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Nickel and indium core-shell co-catalysts loaded silicon nanowire arrays for efficient photoelectrocatalytic reduction of CO_(2) to formate 被引量:3
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作者 Wenchao Ma Mingcan Xie +4 位作者 Shunji Xie Longfu Wei Yichen Cai Qinghong Zhang Ye Wang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第3期422-428,共7页
Developing an efficient artificial photosynthetic system for transforming carbon dioxide and storing solar energy in the form of chemical bonds is one of the greatest challenges in modern chemistry.However,the limited... Developing an efficient artificial photosynthetic system for transforming carbon dioxide and storing solar energy in the form of chemical bonds is one of the greatest challenges in modern chemistry.However,the limited choice of catalysts with wide light absorption range,long-term stability and excellent selectivity for CO_(2) reduction makes the process sluggish.Here,a core-shell-structured nonnoble-metal Ni@In co-catalyst loaded p-type silicon nanowire arrays(SiNWs)for efficient CO_(2) reduction to formate is demonstrated.The formation rate and Faradaic efficiency of formate over the Ni@In/SiNWs catalyst reach 58μmol h^(-1) cm^(-2) and 87% under the irradiation of one simulated sunlight(AM 1.5 G,100 mW cm^(-2)),respectively,which are about 24 and 12 times those over the pristine SiNWs.The enhanced photoelectrocatalytic performance for CO_(2) reduction is attributed to the rational combination of Ni capable of effectively extracting the photogenerated electrons and In responsible for the selective activation of CO_(2). 展开更多
关键词 CO_(2)reduction PHOTOELECTROCATALYSIS Core-shell-structured co-catalyst Silicon nanowire arrays
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Direct Z-scheme WO_(3-x) nanowire-bridged TiO_(2) nanorod arrays for highly efficient photoelectrochemical overall water splitting 被引量:2
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作者 Sheng Lin He Ren +7 位作者 Zhi Wu Lan Sun Xia-Guang Zhang Yu-Mei Lin Kelvin H.L.Zhang Chang-Jian Lin Zhong-Qun Tian Jian-Feng Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第8期721-729,I0015,共10页
All-solid-state Z-scheme photocatalysts for overall water splitting to evolve H_(2) is a promising strategy for efficient conversion of solar energy.However,most of these strategies require redox mediators.Herein,a di... All-solid-state Z-scheme photocatalysts for overall water splitting to evolve H_(2) is a promising strategy for efficient conversion of solar energy.However,most of these strategies require redox mediators.Herein,a direct Z-scheme photoelectrocatalytic electrode based on a WO_(3-x)nanowire-bridged TiO_(2)nanorod array heterojunction is constructed for overall water splitting,producing H_(2).The as-prepared WO_(3-x)/TiO_(2)nanorod array heterojunction shows photoelectrochemical(PEC)overall water splitting activity evolving both H_(2) and O_(2)under UV-vis light irradiation.An optimum PEC activity was achieved over a 1.67-WO_(3-x)/TiO_(2)photoelectrode yielding maximum H_(2) and O_(2)evolution rates roughly 11 times higher than that of pure TiO_(2)nanorods without any sacrificial agent or redox mediator.The role of oxygen vacancy in WO_(3-x)in affecting the H_(2) production rate was also comprehensively studied.The superior PEC activity of the WO_(3-x)/TiO_(2)electrode for overall water splitting can be ascribed to an efficient Z-scheme charge transfer pathway between the WO_(3-x)nanowires and TiO_(2)nanorods,the presence of oxygen vacancies in WO_(3-x),and a bias potential applied on the photoelectrode,resulting in effective spatial charge separation.This study provides a novel strategy for developing highly efficient PECs for overall water splitting. 展开更多
关键词 TiO_(2) nanorod arrays WO_(3-x) nanowire Heterostructure PHOTOELECTROCHEMICAL Hydrogen production
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Superior surface electron energy level endows WP_(2) nanowire arrays with N_(2) fixation functions 被引量:1
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作者 Dongdong Han Xiaojing Liu +10 位作者 Jinyan Cai Yufang Xie Shuwen Niu Yishang Wu Yipeng Zang Yanyan Fang Fengqi Zhao Wengang Qu Minghua Chen Gongming Wang Yitai Qian 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第8期55-62,I0003,共9页
Nitrogen reduction reaction(NRR)under ambient conditions is always a long-standing challenge in science,due to the extreme difficulty in breaking the strong N≡N triple bond.The key to resolving this issue undoubtedly... Nitrogen reduction reaction(NRR)under ambient conditions is always a long-standing challenge in science,due to the extreme difficulty in breaking the strong N≡N triple bond.The key to resolving this issue undoubtedly lies in searching superior catalysts to efficiently activate and hydrogenate the stable nitrogen molecules.We herein evaluate the feasibility of WP_(2) for N2 activation and reduction,and first demonstrate WP_(2) with an impressive ammonia yield rate of 7.13 lg h^(-1)cm^(-2),representing a promising W-based catalyst for NRR.DFT analysis further reveals that the NRR catalysis on WP_(2) proceeds in a distal reaction pathway,and the exceptional NRR activity is originated from superior surface electron energy level matching between WP_(2) and NRR potential which facilitates the interfacial proton-coupled electron transfer dynamics.The successfully unraveling the intrinsic catalytic mechanism of WP_(2) for NRR could offer a powerful platform to manipulate the NRR activity by tuning the electron energy levels. 展开更多
关键词 WP_(2) ELECTROCATALYSIS Energy level Nitrogen reduction nanowire arrays
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CdS/SiO_2 nanowire arrays and CdS nanobelt synthesized by thermal evaporation
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作者 YU Ling-min ZHU Chang-chun +2 位作者 FAN Xin-hui QI Li-jun YAN Wen 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2006年第11期1956-1960,共5页
CdS/SiO2 nanowire arrays and CdS nanobelts were synthesized by thermal evaporation of CdS and CdO mixture powders, with highly selective etching occurring on the silicon substrate surfaces. Study of the growth mechani... CdS/SiO2 nanowire arrays and CdS nanobelts were synthesized by thermal evaporation of CdS and CdO mixture powders, with highly selective etching occurring on the silicon substrate surfaces. Study of the growth mechanism of CdS/SiO2 nanowire arrays and the growth process of CdS nanobelts showed that the growth of CdS dendrites plays an important role in the formation of CdS/SiO2 nanowire arrays, and that the mechanism of CdS/SiO2 nanowire arrays growth was in good agreement with “self-assembling nanoelectrochemistry”. In the thermal evaporation process, an interaction between Si from silicon substrate and Cd took place. 展开更多
关键词 CdS/SiO2 nanowire arrays CdS nanobelts CdS dendrites Self-assembling nanoelectrochemistry
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Optimized CeO_(2) Nanowires with Rich Surface Oxygen Vacancies Enable Fast Li-Ion Conduction in Composite Polymer Electrolytes 被引量:2
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作者 Lu Gao Nan Wu +7 位作者 Nanping Deng Zhenchao Li Jianxin Li Yong Che Bowen Cheng Weimin Kang Ruiping Liu Yutao Li 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第1期218-223,共6页
Low-cost and flexible solid polymer electrolytes are promising in all-solid-state Li-metal batteries with high energy density and safety.However,both the low room-temperature ionic conductivities and the small Li^(+)t... Low-cost and flexible solid polymer electrolytes are promising in all-solid-state Li-metal batteries with high energy density and safety.However,both the low room-temperature ionic conductivities and the small Li^(+)transference number of these electrolytes significantly increase the internal resistance and overpotential of the battery.Here,we introduce Gd-doped CeO_(2) nanowires with large surface area and rich surface oxygen vacancies to the polymer electrolyte to increase the interaction between Gd-doped CeO_(2) nanowires and polymer electrolytes,which promotes the Li-salt dissociation and increases the concentration of mobile Li ions in the composite polymer electrolytes.The optimized composite polymer electrolyte has a high Li-ion conductivity of 5×10^(-4)4 S cm^(-1) at 30℃ and a large Li+transference number of 0.47.Moreover,the composite polymer electrolytes have excellent compatibility with the metallic lithium anode and high-voltage LiNi_(0.8)Mn _(0.1)Co_(0.1)O_(2)(NMC)cathode,providing the stable cycling of all-solid-state batteries at high current densities. 展开更多
关键词 composite polymer electrolytes Gd-doped CeO_(2)nanowires Li-ion conduction oxygen vacancies surface interaction
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Integration of urchin-like MnCo_(2)O_(4)@C core–shell nanowire arrays within porous copper current collector for superior performance Li-ion battery anodes
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作者 Xue-Ru Zhang Qiong Wu +3 位作者 Yong Zhang Xi-Fei Li Ting Xie Yu-Cheng Wu 《Rare Metals》 SCIE EI CAS CSCD 2024年第2期599-611,共13页
Spinel MnCo_(2)O_(4) is a promising energy storage candidate as anode materials in lithium-ion batteries owing to synergistic effects of two intrinsic solid-state redox couples.However,low conductivity,poor rate capac... Spinel MnCo_(2)O_(4) is a promising energy storage candidate as anode materials in lithium-ion batteries owing to synergistic effects of two intrinsic solid-state redox couples.However,low conductivity,poor rate capacity and rapid capacity fading have seriously impaired its practical applications.To overcome the inferiorities,urchin-like MnCo_(2)O_(4)@C core–shell nanowire arrays have been fabricated directly within a porous copper current collector via a facile hydrothermal method followed by a chemical vapor deposition carbonization process.In a typical nanowire,the core is composed of interconnected MnCo_(2)O_(4)nanoparticles and the shell shows as a thin amorphous carbon layer.The integrated MnCo_(2)O_(4)@C/Cu structure could act as working anodes without using additives or polymer binders.While MnCo_(2)O_(4)@C/Cu possesses slightly longer Li-ion insertion/desertion pathway than that of MnCo_(2)O_(4)/Cu,the carbon shell could effectively prevent the pulverization of MnCo_(2)O_(4) and lower down charge transfer resistance and actively participate in Li-ion cycles.The rearrangement of carbon atoms during lithiation/delithiation cycling could inhibit the formation of passive solid electrolyte interphase films.As a result,the MnCo_(2)O_(4)@C/Cu electrode presents superior rate capacity(600 mAh·g^(−1) at 1 A·g^(−1)) and better stability(797 mAh·g^(−1) after 200 cycles at 100 mA·g^(−1)).The excellent reversible Li ion storage capacity,cycling stability and rate capacity endow MnCo_(2)O_(4)@C/Cu great potential as stable and high output integrated anode materials in Li-ion batteries. 展开更多
关键词 MnCo_(2)O_(4)@C Urchin-like nanowire arrays CORE-SHELL Integrated anode materials Lithium-ion batteries
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Cu_(2)O/Co_(3)O_(4)纳米阵列的制备与性质研究
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作者 厉壬承 朱凯文 +2 位作者 张梦瑶 朱丽丽 孟沂 《山西化工》 CAS 2024年第1期15-16,41,共3页
硫化氢(H2S)被证实是第三种内源性气体信号分子,其异常浓度与许多疾病密切相关。如果能够获得一种快速、高灵敏度的传感器来监测生物体内硫化氢的动态变化,那么这些疾病的可控性就会大大提高。本研究提出了一种基于Cu_(2)O/Co_(3)O_(4)... 硫化氢(H2S)被证实是第三种内源性气体信号分子,其异常浓度与许多疾病密切相关。如果能够获得一种快速、高灵敏度的传感器来监测生物体内硫化氢的动态变化,那么这些疾病的可控性就会大大提高。本研究提出了一种基于Cu_(2)O/Co_(3)O_(4)纳米阵列的生物H2S传感材料,基于界面电导调制和硫化反应,该材料对人体血液中的H2S表现出良好的灵敏度、选择性和稳定性。这项工作证明了Cu_(2)O/Co_(3)O_(4)纳米阵列应用于便携式传感器快速检测生物硫化氢的可靠性。 展开更多
关键词 H_(2)S气体传感器 生物检测 纳米阵列
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用模板法制备TiO_2纳米线阵列膜及光催化性能的研究 被引量:34
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作者 高原 马永祥 力虎林 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2003年第6期1089-1092,共4页
用溶胶 -凝胶技术在多孔阳极氧化铝模板的有序微孔内制备了高度取向的 Ti O2 纳米线阵列膜光催化剂 .用 XRD,AFM和 SEM等手段对样品进行了表征 .结果表明 ,Ti O2 纳米线阵列膜晶型为锐钛矿 ,从AFM图像中可以看出 Ti O2 纳米线线径分布... 用溶胶 -凝胶技术在多孔阳极氧化铝模板的有序微孔内制备了高度取向的 Ti O2 纳米线阵列膜光催化剂 .用 XRD,AFM和 SEM等手段对样品进行了表征 .结果表明 ,Ti O2 纳米线阵列膜晶型为锐钛矿 ,从AFM图像中可以看出 Ti O2 纳米线线径分布均匀一致 ,取向性极好 ,直径与 AAO模板的孔径大小一致 .以其对吖啶橙的降解效果作为评价光催化活性的标准 ,与相同条件下制备的 Ti O2 /玻璃膜相比 ,Ti O2 纳米线阵列膜具有很好的催化活性 . 展开更多
关键词 模板法 制备 TiO2 纳米线阵列膜 光催化性能 光催化剂 吖啶橙 光催化降解 二氧化钛 污染物 治理 多孔阳极氧化铝模板 溶胶-凝胶技术
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Cu_(2)O纳米线阵列的制备与表征
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作者 王佳伟 韦江 +2 位作者 陈威 王日昕 刘秋香 《化工新型材料》 CAS CSCD 北大核心 2023年第S02期389-391,共3页
Cu_(2)O纳米线阵列既保留了纳米线长径比高、比表面积大等优点,又具有规模效应及协同效应,在气敏、光伏等领域具有广阔的应用前景。以泡沫铜为基体,通过化学法制备Cu(OH)_(2)纳米线阵列为前驱体,并在N_(2)气氛中采用两步加热法制备Cu_(... Cu_(2)O纳米线阵列既保留了纳米线长径比高、比表面积大等优点,又具有规模效应及协同效应,在气敏、光伏等领域具有广阔的应用前景。以泡沫铜为基体,通过化学法制备Cu(OH)_(2)纳米线阵列为前驱体,并在N_(2)气氛中采用两步加热法制备Cu_(2)O纳米线阵列,利用X射线衍射(XRD)、扫描电镜(SEM)对Cu_(2)O纳米线阵列结构进行表征。结果表明:只需控制、优化Cu基底的曲率半径和弧度,就能制备出Cu_(2)O纳米线阵列,这为制备Cu_(2)O纳米线阵列薄膜提供了新的思路。 展开更多
关键词 泡沫铜 Cu(OH)_(2)纳米线阵列 Cu_(2)O纳米线阵列 两步加热法
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Co_(2)P_(4)O_(12)/NF纳米线阵列的制备与电解水性能研究
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作者 张卫国 卢宜鹏 +1 位作者 王宏智 姚素薇 《化学工业与工程》 CAS CSCD 北大核心 2023年第2期17-24,共8页
以CoCl_(2)·6H_(2)O为原料,通过溶剂热法和磷化工艺在泡沫镍表面构建Co_(2)P_(4)O_(12)阵列,Co_(2)P_(4)O_(12)纳米线直径约200 nm。采用SEM、TEM和XRD进行形貌和晶体学特性表征,并利用三电极体系在碱性环境下测量电化学性能。在... 以CoCl_(2)·6H_(2)O为原料,通过溶剂热法和磷化工艺在泡沫镍表面构建Co_(2)P_(4)O_(12)阵列,Co_(2)P_(4)O_(12)纳米线直径约200 nm。采用SEM、TEM和XRD进行形貌和晶体学特性表征,并利用三电极体系在碱性环境下测量电化学性能。在析氢过程中,只需要122 mV过电位就能达到10 mA·cm^(-2)电流密度。析氧过程中,仅需要334 mV的过电位就能达到15 mA·cm^(-2)电流密度。组装的电解池在15 mA·cm^(-2)的电流密度下工作40 h后电解槽电压没有发生明显变化,展现出很好的稳定性。Co_(2)P_(4)O_(12)/NF是一种有潜力的双功能催化剂。 展开更多
关键词 Co_(2)P_(4)O_(12) 纳米线阵列 析氢过程 析氧过程 双功能催化剂
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负载高性能MnO2@Ni(OH)2核/壳纳米线阵列碳布电极的非对称超级电容器性能研究 被引量:2
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作者 闫慧君 白建伟 +4 位作者 王玉 周红霞 景晓燕 王君 白雪峰 《材料工程》 EI CAS CSCD 北大核心 2019年第11期115-122,共8页
通过两步法在碳布(CC)上成功制备MnO2@Ni(OH)2核/壳纳米线阵列(NWAs),并应用于柔性全固态非对称超级电容器(ASCs)中。Ni(OH)2纳米片整齐地包覆在每个MnO2纳米线上,与纯MnO2纳米线相比获得了更高的比电容值(在扫描速率为5mV/s时,比电容值... 通过两步法在碳布(CC)上成功制备MnO2@Ni(OH)2核/壳纳米线阵列(NWAs),并应用于柔性全固态非对称超级电容器(ASCs)中。Ni(OH)2纳米片整齐地包覆在每个MnO2纳米线上,与纯MnO2纳米线相比获得了更高的比电容值(在扫描速率为5mV/s时,比电容值为432.8F/g)。该电极材料同时具有良好的循环稳定性,在5A/g下充放电2000圈后,仍保持初始比电容的92.3%。自组装的MnO2@Ni(OH)2//MnO2 ASC具有1.8V的宽电势窗口,输出了高能量密度(69.2Wh/kg)和高功率密度(当54.6Wh/kg时4.5kW/kg)。结果表明,MnO2@Ni(OH)2 NWAs以碳布作为柔性基底,拥有高比表面积可以被大规模地应用在超级电容器领域中。 展开更多
关键词 MnO2@Ni(OH)2纳米线阵列 核/壳结构 碳布 非对称电容器 能量存储
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Hierarchical TiO2-B nanowire@α-Fe2O3 nanothorn core-branch arrays as superior electrodes for lithium-ion microbatteries 被引量:7
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作者 Hui Xia Wen Xiong +3 位作者 Chiew Keat Lim Qiaofeng Yao Yadong Wang Jianping Xie 《Nano Research》 SCIE EI CAS CSCD 2014年第12期1797-1808,共12页
This paper reports a simple yet efficient method for the synthesis of hierarchical TiO2-B nanowire@α-Fe2O3 nanothorn core-branch arrays based on a stepwise hydrothermal approach. The as-fabricated hybrid arrays show ... This paper reports a simple yet efficient method for the synthesis of hierarchical TiO2-B nanowire@α-Fe2O3 nanothorn core-branch arrays based on a stepwise hydrothermal approach. The as-fabricated hybrid arrays show impressive performance as a high-capacity anode for lithium-ion batteries. The key design in this study is a core-branch hybrid architecture, which not only provides large surface active sites for lithium ion insertion/extraction, but also enables fast charge transport owing to the reduced diffusion paths for both electrons and lithium ions. The peculiar combination of attributes of TiO2 (good structural stability) and Fe2O3 (large specific capacity) provides the hybrid array electrodes with several desirable electrochemical features: large reversible capacity (-800 mA.h.g^-1 for specific mass capacity and -750 μA.h-cm^-2 for specific areal" capacity), good cycling stability, and high rate capability. The impressive electrochemical performance, together with the facile synthesis procedure, may provide an efficient platform to integrate the TiO2 nanowire@Fe2O3 nanothorn core-branch arrays as a three-dimensional thin film electrode for lithium-ion microbatteries. 展开更多
关键词 TiO2-B Fe2O3 nanowire arrays hierarchicalhybrid MICROBATTERIES
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Enhanced Photocatalytic Degradation of Rhodamine B by Cu_2O Coated Silicon Nanowire Arrays in Presence of H_2O_2 被引量:7
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作者 Chengtao Yang Jinliang Wang +1 位作者 Lirun Mei Xiaoyu Wang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2014年第11期1124-1129,共6页
Highly ordered Cu2O coated silicon nanowire arrays (SiNWAs) were fabricated as photocatalyst via depositing Cu nanoparticles on silver-assisted electroless-etched SiNWAs and subsequently annealing. The as-prepared s... Highly ordered Cu2O coated silicon nanowire arrays (SiNWAs) were fabricated as photocatalyst via depositing Cu nanoparticles on silver-assisted electroless-etched SiNWAs and subsequently annealing. The as-prepared samples have been characterized by scanning electron microscopy, X-ray diffraction and UV-VIS-NIR spectrophotometry. The photocatalytic properties of the Cu2O coated SiNWAs were investigated by degradation of Rhodamine B (RhB) under simulated solar light with a cut-off filter (λ 〉 420 nm). The results indicated that H2O2 could greatly improve the photocatalytic properties of Cu2O coated SiNWAs, and exhibited strong synergy effect between them. The hybrid nanowire arrays will be promising photocatalytic materials in the field of energy and environment. 展开更多
关键词 Silicon nanowire arrays CU2O p-n junction H2O2 Photocatalytic degradation
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Single-crystal TiO2/SrTiO3 core–shell heterostructured nanowire arrays for enhanced photoelectrochemical performance 被引量:5
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作者 Ying Chen Shi Li +3 位作者 Ruo-Yu Zhao Wei Li Zhao-Hui Ren Gao-Rong Han 《Rare Metals》 SCIE EI CAS CSCD 2019年第5期369-378,共10页
Vertically aligned TiO2/SrTiO3 core–shell heterostructured nanowire arrays with different shell thicknesses(5–40 nm)were fabricated on fluorine-doped tin oxide substrate via a hydrothermal process.Microstructural ch... Vertically aligned TiO2/SrTiO3 core–shell heterostructured nanowire arrays with different shell thicknesses(5–40 nm)were fabricated on fluorine-doped tin oxide substrate via a hydrothermal process.Microstructural characterization demonstrated that the TiO2 nanowires were uniformly coated by the singlecrystal SrTiO3 shell,where continuous and large-area interface could be clearly observed.By this means,significantly enhanced photoelectrochemical water splitting properties(0.78 mA·cm^-2 at 1.23 V vs.RHE)were successfully realized in well-designed sample(with a shell thickness of 5–10 nm)compared with those of pristine TiO2(0.38 mA·cm^-2 at 1.23 V vs.RHE).The improvement of photoelectrochemical properties was attributed to the improved charge injection and charge separation,which are calculated by the results of water oxidation and sulfite oxidation measurements.Based on these results,a mechanism was proposed that SrTiO3 shell acted as an electron–hole separation layer to improve the photocurrent density.On the other hand,the sample with an over-thick SrTiO3 shell(20–40 nm)exhibited slightly reduced photoelectrochemical properties(0.66 mA·cm^-2),which could be explained by the increase of the recombination rate in thethicker SrTiO3 shell.This work provided a facile strategy to improve and modulate the photoelectrochemical performance of heterostructured photoanodes. 展开更多
关键词 TiO2/SrTiO3 heterostructured nanowire arrays PHOTOELECTROCHEMICAL water splitting SHELL thickness Band alignment
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Hierarchical mesoporous Co_3O_4@ZnCo_2O_4 hybrid nanowire arrays supported on Ni foam for high-performance asymmetric supercapacitors 被引量:9
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作者 Menggang Li Weiwei Yang +1 位作者 Yarong Huang Yongsheng Yu 《Science China Materials》 SCIE EI CSCD 2018年第9期1167-1176,共10页
In this paper, hierarchical mesoporous Co3O4@ZnCo2O4 hybrid nanowire arrays(NWAs) on Ni foam were prepared through a two-step hydrothermal process associated with successive annealing treatment. The Co3O4@ZnCo2O4 hy... In this paper, hierarchical mesoporous Co3O4@ZnCo2O4 hybrid nanowire arrays(NWAs) on Ni foam were prepared through a two-step hydrothermal process associated with successive annealing treatment. The Co3O4@ZnCo2O4 hybrid NWAs exhibited excellent electrochemical performances with a high specific capacity of 1,240.5 C g^-1 at a current density of 2 mA cm^-2, with rate capability of 59.0%shifting from 2 to 30 mA cm^-2, and only a 9.1% loss of its capacity even after 3,000 cycles at a consistent current density of 10 mA cm^-2. An asymmetric supercapacitor(Co3O4@ZnCo2O4 NWAs||activated carbon) was fabricated and exhibited a high specific capacity of 168 C g^-1 at a current density of 1 A g^-1. And a preferable energy density of 37.3 W h kg^-1 at a power density of 800 W kg^-1 was obtained. The excellent electrochemical performances indicate the promising potential application of the hierarchical mesoporous Co3O4@ZnCo2O4 hybrid NWAs in energy storage field. 展开更多
关键词 Co3O4@ZNCo2O4 nanowire arrays specific capacity asymmetric supercapacitor
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Cu_(2)Sb decorated Cu nanowire arrays for selective electrocatalytic CO_(2)to CO conversion 被引量:5
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作者 Shiyong Mou Yonghao Li +9 位作者 Luchao Yue Jie Liang Yonglan Luo Qian Liu Tingshuai Li Siyu Lu Abdullah M.Asiri Xiaoli Xiong Dongwei Ma Xuping Sun 《Nano Research》 SCIE EI CSCD 2021年第8期2831-2836,共6页
The advancement of cost-effective and selective electrocatalyst towards CO_(2) to CO conversion is crucial for renewable energy conversion and storage,thus to achieve carbon-neutral cycle in a sustainable manner.In th... The advancement of cost-effective and selective electrocatalyst towards CO_(2) to CO conversion is crucial for renewable energy conversion and storage,thus to achieve carbon-neutral cycle in a sustainable manner.In this communication,we report that CujSb decorated Cu nanowire arrays on Cu foil act as a highly active and selective electrocatalyst for CO_(2) to CO conversion.In CO_(2)-saturated 0.1 M KHCO_(3),it achieves a high Faraday efficiency(FE)of 86.5%for CO,at-0.90 V vs.reversible hydrogen electrode(RHE).The H_(2)/CO ratio is tunable from 0.08:1 to 5.9:1 by adjusting the potential.It is worth noting that HCOO-product was totally suppressed on such catalyst,compared with Sb counterpart.The improving selectivity for CO could be attributed to the bimetallic effect and nanowire arrays structure. 展开更多
关键词 Cu_(2)Sb nanowire arrays electrochemical CO_(2)reduction CO_(2)to CO conversion
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CeO2@NiCo2O4 nanowire arrays on carbon textiles as high performance cathode for Li-O2 batteries 被引量:2
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作者 Zhen-Dong Yang Zhi-Wen Chang +2 位作者 Ji-Jing Xu Xiao-Yang Yang Xin-Bo Zhang 《Science China Chemistry》 SCIE EI CAS CSCD 2017年第12期1540-1545,共6页
The successful development of Li-O_2 battery technology depends on developing a stable and efficient cathode. As an important step toward this goal, for the first time, we report the development of CeO_2 nanoparticles... The successful development of Li-O_2 battery technology depends on developing a stable and efficient cathode. As an important step toward this goal, for the first time, we report the development of CeO_2 nanoparticles modified NiCo_2O_4 nanowire arrays(NWAs) grown on the carbon textiles as a new carbon-free and binder-free cathode system. In this study, the Li-O_2 battery with the CeO_2@NiCo_2O_4 NWAs has exhibited much reduced overpotentials, a high discharge capacity, an improved cycling stability,outperforming the Li-O_2 battery with NiCo_2O_4 NWAs. These improvements can be attributed to both the tailored morphology of discharge product and improved oxygen reduction reaction(ORR) and oxygen evolution reaction(OER) activity after CeO_2 NPs deposition. To a considerable extent, this idea of cathode construction including structure design and composition optimization can provide guidance for further researches in developing more powerful cathode for Li-O_2 battery. 展开更多
关键词 Li-O2 battery efficient cathode design CeO2 nanoparticles NiCo2O4 nanowire arrays improved electrochemical performances
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Fabrication and Growth Mechanism of Single-crystalline Rutile TiO_2 Nanowires by Liquid-phase Deposition Process in a Porous Alumina Template 被引量:4
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作者 Abbas Sadeghzadeh Attar Zahra Hassani 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2015年第8期828-833,共6页
TiO2 nanowire arrays were successfully fabricated by liquid-phase deposition method using porous alumina templates. The obtained TiO2 nanowires were characterized using Raman spectroscopy, X-ray diffraction (XRD), s... TiO2 nanowire arrays were successfully fabricated by liquid-phase deposition method using porous alumina templates. The obtained TiO2 nanowires were characterized using Raman spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), field emission scanning electron microscopy (FE- SEM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED) analysis. Results of electron microscopic observations indicated that the nanowires were smooth and uniform with a diameter of about 50-80 nm and several micrometers in length. SAED, Raman, and XRD mea- surements showed that TiO2 nanowires were single-crystalline with a pure rutile structure after heating at 800 ~C for 10 h. In this situation, the nanowire constituents grew preferentially along the 〈001〉 direction. Furthermore, the formation process and mechanistic study of the Ti02 nanowire arrays were proposed and discussed in detail. The nanowires are clearly produced by the deposition of TiO2 particles on the inner wall of the template nanochannels. 展开更多
关键词 TiO2 nanowire arrays Single crystal Rutile phase Liquid-phase deposition process
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Oxygen vacancy engineering on cerium oxide nanowires for room-temperature linalool detection in rice aging 被引量:4
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作者 Jinyong XU Chao ZHANG 《Journal of Advanced Ceramics》 SCIE EI CAS CSCD 2022年第10期1559-1570,共12页
It is a huge challenge for metal oxide semiconductor gas sensors to inspect volatile organic compounds(VOCs)at room temperature(RT).Herein,the effective utilization of cerium oxide(CeO_(2))nanowires for RT detection o... It is a huge challenge for metal oxide semiconductor gas sensors to inspect volatile organic compounds(VOCs)at room temperature(RT).Herein,the effective utilization of cerium oxide(CeO_(2))nanowires for RT detection of VOCs was realized via regulating its surface chemical state.Oxygen vacancy engineering on CeO_(2) nanowires,synthesized via hydrothermal method,can be manipulated by annealing under various controlled atmospheres.The sample annealed under 5%H_(2)+95%Ar condition exhibited outstanding RT sensing properties,displaying a high response of 16.7 towards 20 ppm linalool,a fast response and recovery time(16 and 121 s,respectively),and a low detection of limit of 0.54 ppm.The enhanced sensing performance could be ascribed for the synergistic effects of its nanowire morphology,the large specific surface area(83.95 m^(2)/g),and the formation of extensive oxygen vacancy accompanied by an increase in Ce^(3+).Additionally,the practicability of the sensor was verified via two varieties of rice(Indica and Japonica rice)stored in various periods(1,3,5,7,15,and 30 d).The experimental results revealed that the sensor was able to distinguish Indica rice from Japonica rice.Accordingly,the as-developed sensor delivers a strategic material to develop high-performance RT electronic nose equipment for monitoring rice quality. 展开更多
关键词 erium oxide(CeO_(2)) nanowire oxygen vacancy LINALOOL gas sensor
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