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Enhancing photocatalytic performance by constructing ultrafine TiO2 nanorods/g-C3N4 nanosheets heterojunction for water treatment 被引量:16
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作者 Shiliang Luan Dan Qu +6 位作者 Li An Wenshuai Jiang xiang Gao Shixin Hua Xiang Miao Yuanjing Wen Zaicheng Sun 《Science Bulletin》 SCIE EI CSCD 2018年第11期683-690,共8页
Photocatalysis is considered to be a clean, green and efficient method to purify water. In this report, we first developed a highly efficient ultrafine TiO2 nanorods/g-C3N4 nanosheets (TiO2 NR/CN NS) composites via ... Photocatalysis is considered to be a clean, green and efficient method to purify water. In this report, we first developed a highly efficient ultrafine TiO2 nanorods/g-C3N4 nanosheets (TiO2 NR/CN NS) composites via a simple hydrothermal method. Tiny TiO2 nanorods (diameter: ~1.5 nm and length: ~8.3 nm) were first loaded in situ on the CN NS by adding graphitic carbon nitride (g-C3N4) to the reaction solution. The TiO2 NR/CN NS composites present high charge separation efficiency and broader light absorbance than P25 TiO2. Furthermore, we illustrate that the TiO2 NR/CN NS catalyst possesses high performance for the photocatalytic degradation of the common and stubborn pollutants in water, such as the rhodamine B (RhB) dye and phenol. Under visible light (λ 〉 420 nm) irradiation, the apparent rate of the TiO2 NR/CN NR is 172 and 41 times higher than that of the P25 TiO2 and TiO2 NR, respectively. Additionally, we speculated that the heterojunction formed between TiO2 NR and CN NS, which is the basis for the experiments we have designed and the corresponding results. We demonstrated that reactive oxidative species such as superoxide anion radical and holes play critical roles in the degradation, and the hydroxyl radical contributes nothing to the degradation. 展开更多
关键词 HETEROJUNCTION Photocatalyst tio2 nanorods g-C3N4 nanosheets Water treatment
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Photocatalytic degradation evaluation of N–Fe codoped aligned TiO2 nanorods based on the effect of annealing temperature 被引量:10
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作者 Abbas Sadeghzadeh-Attar 《Journal of Advanced Ceramics》 SCIE CSCD 2020年第1期107-122,共16页
In this paper,a comparative study on the photocatalytic degradation of the Rhodamine B(Rh B)dye as a model compound using N–Fe codoped Ti O2 nanorods under UV and visible-light(λ≥420 nm)irradiations has been perfor... In this paper,a comparative study on the photocatalytic degradation of the Rhodamine B(Rh B)dye as a model compound using N–Fe codoped Ti O2 nanorods under UV and visible-light(λ≥420 nm)irradiations has been performed.Ti O2 photocatalysts were fabricated as aligned nanorod arrays by liquid-phase deposition process,annealed at different temperatures from 400 to 800℃.The effects of annealing temperature on the phase structure,crystallinity,BET surface area,and resulting photocatalytic activity of N–Fe codoped Ti O2 nanorods were also investigated.The degradation studies confirmed that the nanorods annealed at 600℃composed of both anatase(79%)and rutile phases(21%)and offered the highest activity and stability among the series of nanorods,as it degraded 94.8%and 87.2%Rh B in 120 min irradiation under UV and visible-light,respectively.Above 600℃,the photocatalytic performance of nanorods decreased owning to a phase change,decreased surface area and bandgap,and growth of Ti O2 crystallites induced by the annealing temperature.It is hoped that this work could provide precious information on the design of 1 D catalyst materials with more superior photodegradation properties especially under visible-light for the further industrial applications. 展开更多
关键词 N–Fe codoped tio2 nanorods liquid-phase deposition annealing temperature photocatalytic degradation
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In situ growth of single-crystal TiO2 nanorod arrays on Ti substrate: Controllable synthesis and photoelectro- chemical water splitting 被引量:4
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作者 Tingting Zhang Zia Ur Rahman +3 位作者 Ning Wei Yupeng Liu Jun Liang Daoai Wang 《Nano Research》 SCIE EI CAS CSCD 2017年第3期1021-1032,共12页
Despite one-dimensional (1D) semiconductor nanostructure arrays attracting increasing attention due to their many advantages, highly ordered TiO2 nanorod arrays (TiO2 NR) are rarely grown in situ on Ti substrates.... Despite one-dimensional (1D) semiconductor nanostructure arrays attracting increasing attention due to their many advantages, highly ordered TiO2 nanorod arrays (TiO2 NR) are rarely grown in situ on Ti substrates. Herein, a feasible method to fabricate TiO2 NRs on Ti substrates by using a through-mask anodization process is reported. Self-ordered anodic aluminum oxide (AAO) overlaid on Ti substrate was used as a nanotemplate to induce the growth of TiO2 NRs. The NR length and diameter could be controlled by adjusting anodization parameters such as electrochemical anodization voltage, anodization time and temperature, and electrolyte composition. Furthermore, according to the proposed NR formation mechanism, the anodized Ti ions migrate and deposit in the AAO nanochannels to form Ti(OH)4 or amorphous TiO2 NRs under electric field, owing to the confinement effect of the template. Photoelectrochemical tests indicated that, after hydrogenation, the TiO2 NRs presented higher photocurrent density under simulated sunlight and visible light illuminations, suggesting their potential use in photoelectrochemical water splitting, photocatalysis, solar cells, and sensors. 展开更多
关键词 HYDROGENATION tio2 nanorod arrays in situ preparation through-hole anodic alu-minum oxide (AAO) mask PHOTOELECTROCHEMICAL
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Synergistic antibacterial activity of physical-chemical multi-mechanism by TiO2 nanorod arrays for safe biofilm eradication on implant 被引量:8
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作者 Xiangyu Zhang Guannan Zhang +3 位作者 Maozhou Chai Xiaohong Yao Weiyi Chen Paul KChu 《Bioactive Materials》 SCIE 2021年第1期12-25,共14页
Treatment of implant-associated infection is becoming more challenging,especially when bacterial biofilms form on the surface of the implants.Developing multi-mechanism antibacterial methods to combat bacterial biofil... Treatment of implant-associated infection is becoming more challenging,especially when bacterial biofilms form on the surface of the implants.Developing multi-mechanism antibacterial methods to combat bacterial biofilm infections by the synergistic effects are superior to those based on single modality due to avoiding the adverse effects arising from the latter.In this work,TiO2 nanorod arrays in combination with irradiation with 808 nearinfrared(NIR)light are proven to eradicate single specie biofilms by combining photothermal therapy,photodynamic therapy,and physical killing of bacteria.The TiO2 nanorod arrays possess efficient photothermal conversion ability and produce a small amount of reactive oxygen species(ROS).Physiologically,the combined actions of hyperthermia,ROS,and puncturing by nanorods give rise to excellent antibacterial properties on titanium requiring irradiation for only 15 min as demonstrated by our experiments conducted in vitro and in vivo.More importantly,bone biofilm infection is successfully treated efficiently by the synergistic antibacterial effects and at the same time,the TiO2 nanorod arrays improve the new bone formation around implants.In this protocol,besides the biocompatible TiO2 nanorod arrays,an extra photosensitizer is not needed and no other ions would be released.Our findings reveal a rapid bacteria-killing method based on the multiple synergetic antibacterial modalities with high biosafety that can be implemented in vivo and obviate the need for a second operation.The concept and antibacterial system described here have large clinical potential in orthopedic and dental applications. 展开更多
关键词 Titanium implants tio2 nanorod Anti-biofilm Physical insertion Light-triggered therapy
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Photoelectrocatalytic activity of an ordered and vertically aligned TiO2 nanorod array/BDD heterojunction electrode 被引量:4
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作者 Yanhe Han Lei Zhang +2 位作者 Yafei Wang Haimin Zhang Shanqing Zhang 《Science Bulletin》 SCIE EI CAS CSCD 2017年第9期619-625,共7页
Rutile TiO_2 nanorod(TiNR) arrays were fabricated on a boron-doped diamond(BDD) substrate by a simple hydrothermal synthesis method. A fluorine-doped tin oxide(FTO) electrode grown with TiNR arrays was also prepared u... Rutile TiO_2 nanorod(TiNR) arrays were fabricated on a boron-doped diamond(BDD) substrate by a simple hydrothermal synthesis method. A fluorine-doped tin oxide(FTO) electrode grown with TiNR arrays was also prepared using the same technology for comparison. Field-emission scanning electron microscopy results show that oriented TiNR arrays can grow vertically on the surface of BDD and FTO electrodes. TiNR arrays grown on both electrodes had the same length(3 μm). In comparison with the TiNR/FTO electrode, the TiNR/BDD electrode demonstrated a higher photoelectrocatalytic activity for the degradation of water and organic compounds, which is mostly attributed to the formation of a p-n heterojunction between the TiNR arrays and BDD at high potential, apart from the density of TiNR. A linear relationship between the photoelectrocatalytic current and the organic concentration can be observed on both electrodes. However, the linear range between net photoelectrocatalytic current values and organic compound concentrations for the TiNR/BDD electrode are much greater than those for the TiNR/FTO electrode, which makes the TiNR/BDD electrode a versatile material for the photocatalytic degradation and sensing of organic compounds. 展开更多
关键词 Rutile Ti02 nanorods One-dimensioned nanomaterials Boron-doped diamond Photoelectrocatalysis p-n heterojunction
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均相沉淀法制备锐钛矿型TiO2纳米棒 被引量:3
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作者 尹艳红 许泽辉 +2 位作者 杨书廷 杨宝宁 李承斌 《河南师范大学学报(自然科学版)》 CAS CSCD 北大核心 2009年第2期161-164,共4页
采用均相沉淀法,在加入相同浓度沉淀剂的溶液中,以四氯化钛为钛源,控制不同的酸度环境,从而制备出不同粒径的二氧化钛纳米粉体.用透射电镜、X射线衍射仪、比表面积分析仪、差热分析仪和紫外可见光谱仪等,对所制备的纳米粉体进行了表征.... 采用均相沉淀法,在加入相同浓度沉淀剂的溶液中,以四氯化钛为钛源,控制不同的酸度环境,从而制备出不同粒径的二氧化钛纳米粉体.用透射电镜、X射线衍射仪、比表面积分析仪、差热分析仪和紫外可见光谱仪等,对所制备的纳米粉体进行了表征.分析其反应机理及酸度的影响.结果证明:只要把反应溶液的酸度值控制在0.5-3.0之间,总能制备出不同尺寸大小锐钛矿型二氧化钛纳米棒,尺寸分布较窄,纯度高,晶型单一.酸度在制备过程中,只改变其粒径的大下,并不影响二氧化钛的晶型. 展开更多
关键词 均相沉淀法 二氧化钛纳米棒 酸度
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TiO2纳米棒阵列薄膜的制备及其光催化还原Cr(Ⅵ) 被引量:3
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作者 王滨松 夏华 +1 位作者 郑晟良 肖林飞 《环境化学》 CAS CSCD 北大核心 2015年第1期150-155,共6页
采用水热法在导电玻璃(FTO)上合成具有一维结构的TiO2纳米棒阵列薄膜.用扫描电子显微镜,广角X-射线粉末衍射,紫外可见分光光谱等手段对薄膜进行了表征,研究了不同浓度钛酸四丁酯和水热反应时间对FTO-TiO2纳米棒阵列薄膜形貌的影响及FTO-... 采用水热法在导电玻璃(FTO)上合成具有一维结构的TiO2纳米棒阵列薄膜.用扫描电子显微镜,广角X-射线粉末衍射,紫外可见分光光谱等手段对薄膜进行了表征,研究了不同浓度钛酸四丁酯和水热反应时间对FTO-TiO2纳米棒阵列薄膜形貌的影响及FTO-TiO2纳米棒阵列薄膜光催化还原Cr(Ⅵ)的反应性能.结果表明,当钛酸四丁酯浓度为0.05 mol·L-1和水热反应时间为20 h时制备的FTO-TiO2纳米棒阵列薄膜形貌最优,一维FTO-TiO2纳米棒阵列薄膜光催化还原Cr(Ⅵ)的性能优于商业化二氧化钛P25制备的薄膜. 展开更多
关键词 FTO-tio2纳米棒 阵列 薄膜 光催化 还原 Cr(Ⅵ)
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CdS 修饰金红石/锐钛矿混合晶相 TiO2双异质结薄膜的光催化性能研究 被引量:3
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作者 王成伟 潘自蔚 +3 位作者 李燕 侯显 青瑶 鄢建军 《西北师范大学学报(自然科学版)》 CAS 北大核心 2014年第3期39-43,共5页
采用化学气相沉积法在Ti基上制备了金红石相TiO2纳米棒(A-TiO2 NRs),将其在低浓度的TiO2溶胶中浸泡后退火得到锐钛矿/金红石混合晶相TiO2核壳结构(A/R-TiO2 NRs).采用化学水浴沉积法在该结构表面修饰CdS纳米晶颗粒,得到CdS纳米晶粒修饰... 采用化学气相沉积法在Ti基上制备了金红石相TiO2纳米棒(A-TiO2 NRs),将其在低浓度的TiO2溶胶中浸泡后退火得到锐钛矿/金红石混合晶相TiO2核壳结构(A/R-TiO2 NRs).采用化学水浴沉积法在该结构表面修饰CdS纳米晶颗粒,得到CdS纳米晶粒修饰的锐钛矿/金红石混合晶相TiO2三元双异质结(CdS-A/R-TiO2 NRs)薄膜.将该纳米复合薄膜用做光催化剂在模拟太阳光照射下降解目标污染物甲基橙.实验结果表明,A/R-TiO2 NRs薄膜样品的光催化活性优于纯R-TiO2 NRs样品;而CdS-A/R-TiO2 NRs混合晶相双异质结薄膜的光催化活性有更显著的增强. 展开更多
关键词 CdS修饰 tio2 纳米棒 光催化降解
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Sb2S3纳米粒子敏化TiO2分枝纳米棒阵列杂化太阳电池的研究 被引量:2
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作者 郝彦忠 钱近 +2 位作者 栗靖琦 裴娟 李英品 《功能材料》 EI CAS CSCD 北大核心 2020年第5期5060-5064,共5页
采用两步水热法在导电玻璃(FTO)上制备TiO2分枝纳米棒(B-NR)阵列。利用低温化学浴沉积法(CBD)在TiO2分枝纳米棒阵列(B-NRA)基底上沉积Sb2S3纳米粒子(NPs)。接着分别旋涂P3HT和Spiro-OMeTAD组装成TiO2(B-NRA)/Sb2S3/P3HT/Spiro-OMeTAD为... 采用两步水热法在导电玻璃(FTO)上制备TiO2分枝纳米棒(B-NR)阵列。利用低温化学浴沉积法(CBD)在TiO2分枝纳米棒阵列(B-NRA)基底上沉积Sb2S3纳米粒子(NPs)。接着分别旋涂P3HT和Spiro-OMeTAD组装成TiO2(B-NRA)/Sb2S3/P3HT/Spiro-OMeTAD为光活性层的杂化太阳电池。通过对杂化太阳电池的光电性能测试,结果表明,TiO2分枝纳米棒阵列具有高的吸光强度,较大的比表面积和多级电荷传输通道,由TiO2(B-NRA)/Sb2S3/P3HT/Spiro-OMeTAD复合膜结构组装的杂化太阳电池的能量转换效率(PCE)是4.67%。 展开更多
关键词 tio2分枝纳米棒 Sb2S3纳米粒子 水热法 化学浴沉积 杂化太阳电池
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水热法合成金红石型TiO2微米花的研究 被引量:1
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作者 张一兵 谈军 江雷 《电子元件与材料》 CAS CSCD 北大核心 2008年第7期27-29,共3页
采用水热法在玻璃基板上制备了TiO2微米花,研究了反应物TiCl3的起始浓度、反应温度和反应时间对生成产物的形貌与晶型影响,并对产物进行SEM和XRD表征。结果表明:生成的TiO2晶体为金红石型,TiO2微米花的直径约2μm,它由TiO2纳米棒自组装... 采用水热法在玻璃基板上制备了TiO2微米花,研究了反应物TiCl3的起始浓度、反应温度和反应时间对生成产物的形貌与晶型影响,并对产物进行SEM和XRD表征。结果表明:生成的TiO2晶体为金红石型,TiO2微米花的直径约2μm,它由TiO2纳米棒自组装而成,TiO2纳米棒呈现长方体形,棒径约50nm,棒长大约1μm。 展开更多
关键词 无机非金属材料 tio2 合成 微米花 纳米棒 水热法
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Growth of TiO_2 Nanorods by Sol-gel Template Process 被引量:1
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作者 A.Sadeghzadeh Attar Sh.Mirdamadi +1 位作者 F.Hajiesmaeilbaigi M.Sasani Ghamsari 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2007年第5期611-613,共3页
In this work, TiO2 nanorods with uniform diameter of about 100 nm and a length of several micrometers were successfully prepared by the sol-gel template method. Also the influence of molar ratios of precursor on the m... In this work, TiO2 nanorods with uniform diameter of about 100 nm and a length of several micrometers were successfully prepared by the sol-gel template method. Also the influence of molar ratios of precursor on the morphology and structure of TiO2 nanorods has been investigated. The prepared samples were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD results indicated that the TiO2 nanorods were crystallized in the anatase and rutile phases, after annealing to 400-700℃ up to 2 h. 展开更多
关键词 tio2 nanorods Sol-gel process Template-based growth
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基于ZnO纳米棒阵列的钙钛矿太阳电池研究
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作者 肖冠南 梁桃华 甘尚坤 《四川轻化工大学学报(自然科学版)》 CAS 2024年第3期9-16,共8页
在钙钛矿太阳电池中利用水热法制备ZnO纳米棒阵列时,TiO_(2)薄膜一般是制备ZnO种子层以及后续生长ZnO纳米棒阵列的基础。因此TiO_(2)薄膜的致密和平滑程度对ZnO纳米棒阵列的生长及相应太阳电池的光伏性能有重要影响。本文通过使用水解-... 在钙钛矿太阳电池中利用水热法制备ZnO纳米棒阵列时,TiO_(2)薄膜一般是制备ZnO种子层以及后续生长ZnO纳米棒阵列的基础。因此TiO_(2)薄膜的致密和平滑程度对ZnO纳米棒阵列的生长及相应太阳电池的光伏性能有重要影响。本文通过使用水解-热解法以NbCl5为铌源在FTO导电基底上制备了Nb掺杂的TiO_(2)致密层,有效提升了TiO_(2)薄膜的致密程度,并在此基础上通过水热法成功沉积生长了具有不同长度、直径和面密度的ZnO纳米棒阵列。通过两步连续沉积法在所得ZnO纳米棒阵列上制备了摩尔比为CH3NH3I/CH3NH3Br=85/15的CH3NH3PbI3-xBrx钙钛矿薄膜。使用spiro–OMeTAD作为空穴传输层,组装了基于Nb掺杂TiO_(2)致密层的ZnO纳米棒阵列钙钛矿太阳电池,在相对湿度55%的空气中获得了13.97%的光电转换效率。 展开更多
关键词 Nb掺杂 tio2致密层 ZNO纳米棒阵列 钙钛矿太阳电池 光伏性能
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Composite Semiconductor Quantum Dots CdSe/CdS Co-sensitized TiO_2 Nanorod Array Solar Cells 被引量:1
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作者 汪竞阳 章天金 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2012年第5期876-880,共5页
CdSe/CdS semiconductor quantum dots co-sensitized TiO2 nanorod array was fabricated on the transparent conductive fluorine-doped tin oxide (FTO) substrate using the hydrothermal and successive ionic layer adsorption... CdSe/CdS semiconductor quantum dots co-sensitized TiO2 nanorod array was fabricated on the transparent conductive fluorine-doped tin oxide (FTO) substrate using the hydrothermal and successive ionic layer adsorption and reaction (SILAR) process. The structural and morphological properties of the samples were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). The results indicate that CdSe/CdS QDs are uniformly coated on the surface of the TiO2 nanorods. The shift of light absorption edge was monitored by taking UV-visible absorption spectra. Compared with the absorption spectra of the TiO2 nanorod array, deposition of CdSe/CdS QDs shifts the absorption edge to the higher wavelength. The enhanced light absorption in the visible-light region of CdSe/CdS/TiO2 nanorod array indicates that CdSe/CdS layers can act as co-sensitizers in quantum dots sensitized solar cells (QDSSCs). By optimizing the CdSe layer deposition cycles, a photocurrent of 5.78 mA/cm2, an open circuit photovoltage of 0.469 V and a conversion efficiency of 1.34 % were obtained under an illumination of 100 mw/cm2. 展开更多
关键词 quantum dots tio2 nanorod array solar cells photovoltaic performance
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TiO2-PTPAT纳米核/壳结构复合膜的制备及电致变色性能
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作者 欧阳密 陈璐 +6 位作者 胡旭明 李裕文 戴大程 屠袁波 白茹 吕晓静 张诚 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2020年第12期2796-2803,共8页
通过水热法在氟掺杂氧化锡(FTO)导电玻璃基底上制备了垂直生长的二氧化钛(TiO2)纳米棒阵列,以TiO2纳米棒阵列为模板采用电化学聚合法,原位制备了TiO2-聚三[2-(4-噻吩)苯]胺(PTPAT)纳米核/壳结构的复合薄膜,相比于纯PTPAT薄膜,TiO2-PTPA... 通过水热法在氟掺杂氧化锡(FTO)导电玻璃基底上制备了垂直生长的二氧化钛(TiO2)纳米棒阵列,以TiO2纳米棒阵列为模板采用电化学聚合法,原位制备了TiO2-聚三[2-(4-噻吩)苯]胺(PTPAT)纳米核/壳结构的复合薄膜,相比于纯PTPAT薄膜,TiO2-PTPAT复合薄膜显示出更好的电致变色(EC)性能.PTPAT薄膜在600 nm波长下的对比度为28%,在1100 nm波长下的对比度为60%,其褪色时间为3.86 s,着色时间为5.52 s;TiO2-PTPAT复合薄膜在600 nm波长下的对比度为43%,在1100 nm波长下的对比度为79%,其褪色时间为3.35 s,着色时间为4.43 s,表明核/壳复合结构薄膜的光学对比度和响应时间性能更加优异.将PTPAT薄膜和TiO2-PTPAT复合薄膜作为电致变色层组装成固态EC器件,基于复合薄膜的器件具有更好的循环稳定性和更高的耐受电压.复合薄膜在保持PTPAT薄膜原有的EC性能的基础上,由于有序生长的纳米阵列结构的引入增加了薄膜的比表面积,为电致变色过程中离子的掺杂和脱掺杂提供了更多有序通道,从而加快了离子扩散速度.TiO2阵列的引入也改善了聚合物薄膜与透明导电电极之间的界面结合情况,从而提升了器件的稳定性. 展开更多
关键词 二氧化钛纳米棒阵列 聚三[2-(4-噻吩)苯]胺 纳米复合 电致变色 电化学聚合
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Effect of hydroxyl on dye-sensitized solar cells assembled with TiO_2 nanorods
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作者 孟立建 杨涛 +1 位作者 云斯宁 李灿 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第1期75-79,共5页
YiO2 nanorods have been prepared on ITO substrates by dc reactive magnetron sputtering technique. The hydroxyl groups have been introduced on the nanorods surface. The structure and the optical properties of these nan... YiO2 nanorods have been prepared on ITO substrates by dc reactive magnetron sputtering technique. The hydroxyl groups have been introduced on the nanorods surface. The structure and the optical properties of these nanorods have been studied. The dye-sensitized solar cells (DSSCs) have been assembled using these TiO2 nanorods as photoelectrode. And the effect of the hydroxyl groups on the properties of the photoelectric conversion of the DSSCs has been studied. 展开更多
关键词 hydroxyl groups tio2 nanorod dye-sensitized solar cells SPUTTERING
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420nm thick CH_3NH_3PbI_(3-x)Br_x capping layers for efficient TiO_2 nanorod array perovskite solar cells
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作者 李龙 史成武 +3 位作者 邓新莲 王艳青 肖冠南 倪玲玲 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第1期104-108,共5页
The rutile TiO2 nanorod arrays with 240 nm in length, 30 nm in diameter, and 420 btm 2 in areal density were prepared by the hydrothermal method to replace the typical 200-300 nm thick mesoporous TiO2 thin films in pe... The rutile TiO2 nanorod arrays with 240 nm in length, 30 nm in diameter, and 420 btm 2 in areal density were prepared by the hydrothermal method to replace the typical 200-300 nm thick mesoporous TiO2 thin films in perovskite solar cells. The CH3NH3PbI3 xBrx capping layers with different thicknesses were obtained on the TiO2 nanorod arrays using different concentration PbI2.DMSO complex precursor solutions in DMF and the photovoltaic performances of the corresponding solar cells were compared. The perovskite solar cells based on 240 nm long TiO2 nanorod arrays and 420 nm thick CH3NH3PbI3 xBrx capping layers showed the best photoelectric conversion efficiency (PCE) of 15.56% and the average PCE of 14.93 ± 0.63% at the relative humidity of 50%-54% under the illumination of simulated AM 1.5 sunlight (100 mW.cm-2). 展开更多
关键词 rutile tio2 nanorod array CH3NH3PbI3 xBrx capping layer perovskite solar cell
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氮掺杂SrTiO3/TiO2纳米棒异质结的制备及光催化活性 被引量:6
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作者 李雨遥 李治 +6 位作者 王云芸 张翼飞 曹晓雨 桂嘉悦 冯波 段可 周杰 《功能材料》 EI CAS CSCD 北大核心 2020年第1期1189-1195,共7页
通过水热反应和直接浸渍法在FTO导电玻璃上制备得到了高度有序的氮掺杂SrTiO3/TiO2纳米棒异质结阵列(N-STO/TNR),利用扫描电子显微镜(SEM),X射线衍射(XRD)和X射线光电子能谱(XPS)对其表面形貌,晶体结构和元素价态进行了分析。同时,采用... 通过水热反应和直接浸渍法在FTO导电玻璃上制备得到了高度有序的氮掺杂SrTiO3/TiO2纳米棒异质结阵列(N-STO/TNR),利用扫描电子显微镜(SEM),X射线衍射(XRD)和X射线光电子能谱(XPS)对其表面形貌,晶体结构和元素价态进行了分析。同时,采用荧光光谱(FL)、紫外可见漫反射光谱(UV-DRS),电化学阻抗谱(EIS)和莫特肖特基(MS)对异质结的光电性能进行了测试。最后以甲基橙为模拟污染物,考察了异质结材料在可见光下的光催化活性。结果表明,SrTiO3/TiO2异质结构能有效的分离光生载流子,同时N元素的掺杂将异质结的光谱响应范围扩展到可见光区,得益于半导体复合和能级修饰策略的协同增强效应,N-STO/TNR展现出优异的光电性能,N-STO/TNR的光催化效率是未改性的TNR样品的5.7倍。 展开更多
关键词 SrTiO3/tio2 异质结 tio2纳米棒 氮掺杂 光催化
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Pt/H-TiO2催化剂制备及其甲醇电催化氧化性能 被引量:3
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作者 韩金 周志有 +3 位作者 汪强 吕妙强 陈驰 孙世刚 《电化学》 CAS CSCD 北大核心 2014年第2期110-115,共6页
以四氯化钛为前驱体,采用水热法合成二氧化钛纳米棒(TiO2,白色),在纯H:气氛,将其550oC热处理2h,即得有氧缺陷和T一填隙原子的二氧化钛纳米棒(H—TiO2,灰黑色).将Pt纳米粒子(~1.9nm)负载于此两种二氧化钛纳米棒上,制得P... 以四氯化钛为前驱体,采用水热法合成二氧化钛纳米棒(TiO2,白色),在纯H:气氛,将其550oC热处理2h,即得有氧缺陷和T一填隙原子的二氧化钛纳米棒(H—TiO2,灰黑色).将Pt纳米粒子(~1.9nm)负载于此两种二氧化钛纳米棒上,制得Pt/TiO2和Pt/H—TiO2催化剂.XRD和XPS测试表明,氢处理TiO2晶型没有变化,仍属金红石型,但增加了Ti—OH表面物种.电化学测试表明,H—TiO2载体能够增强氧在Pt表面的吸脱附能力,从而提高其甲醇电催化氧化活性,Pt/H—TiO2电极甲醇氧化峰电流密度为Pt/TiO2电极的1.6倍、Pt/C电极的2.1倍. 展开更多
关键词 铂纳米粒子 tio2纳米棒 氢处理 甲醇电氧化 氧缺陷 Ti3+填隙原子
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氢化TiO2纳米棒的制备及其对Q235碳钢的光生阴极保护特性 被引量:2
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作者 冯敏 刘盈 +3 位作者 张赛楠 卫宁 吉利 王道爱 《中国表面工程》 EI CAS CSCD 北大核心 2019年第4期115-122,共8页
随着海洋开发的逐步推进,海洋工程中的金属防腐蚀问题显得愈加重要。目前,可利用半导体的光电效应实现对金属的光生阴极保护,为改善常用的TiO2光电极材料的弱光吸收和低转换效率问题,文中利用水热法在FTO导电玻璃表面构建一维有序TiO2... 随着海洋开发的逐步推进,海洋工程中的金属防腐蚀问题显得愈加重要。目前,可利用半导体的光电效应实现对金属的光生阴极保护,为改善常用的TiO2光电极材料的弱光吸收和低转换效率问题,文中利用水热法在FTO导电玻璃表面构建一维有序TiO2纳米棒阵列,并通过氢化处理提高TiO2对太阳光的吸收和光电流密度。考察了氢化TiO2纳米棒阵列在海水环境下对Q235碳钢的光生阴极保护特性,结果表明氢化TiO2纳米棒的光电流密度达到了2.12 mA/cm2,且稳定性良好;当Q235碳钢耦连于模拟太阳光照下的氢化TiO2纳米棒电极时,其界面反应电阻变小,电极电位较原先的腐蚀电位降低约349 mV,说明氢化TiO2纳米棒阵列能够对碳钢产生良好的光生阴极保护效应,且该效应在无光条件下能保持至少7 h。 展开更多
关键词 tio2纳米棒 氢化处理 Q235碳钢 光生阴极保护 腐蚀
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TiO2纳米棒阵列的可控合成及其光电性能 被引量:1
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作者 赵宇龙 顾修全 《微纳电子技术》 北大核心 2018年第1期51-56,共6页
采用简单的水热路线合成出TiO2纳米棒阵列,作为染料敏化太阳电池(DSSC)光阳极,并对其形貌、结构和光电特性进行表征。探讨了前驱体溶液总量、Ti源加入量等对产物形貌以及DSSC性能的影响。研究结果表明:增加前驱体溶液中Ti源的加入量... 采用简单的水热路线合成出TiO2纳米棒阵列,作为染料敏化太阳电池(DSSC)光阳极,并对其形貌、结构和光电特性进行表征。探讨了前驱体溶液总量、Ti源加入量等对产物形貌以及DSSC性能的影响。研究结果表明:增加前驱体溶液中Ti源的加入量将使纳米棒长度和直径同时增加,最终导致形成"蒲公英"状产物,DSSC性能有所提高,同时暗电流也会随之增大;增加前驱体溶液总量也会使纳米棒更长、更密,但DSSC性能提高幅度不大,暗态电流密度-电压(J-V)曲线几乎没有变化。研究将有助于人们更清楚地认识TiO2纳米棒阵列的生长动力学机制,进而优化纳米棒阵列光电器件的性能。 展开更多
关键词 二氧化钛 纳米棒 阵列 染料敏化太阳电池 水热法
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