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破乳—混凝—光催化化学氧化法处理废切削液新工艺 被引量:2
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作者 程刚 路小彬 李艳 《纺织高校基础科学学报》 CAS 2006年第4期376-380,共5页
先硝酸破乳,再用聚合硫酸铁(PFS)和阳离子聚丙烯酰胺(PAM)复合处理废切削液,当pH为8.0,PFS和PAM的用量分别是1 800mg.L-1和8mg.L-1时混凝效果较好.混凝上清液用UV/H2O2/Fe2+系统氧化,当pH=3,分4次加入H2O2,紫外照射6.5h,结果令人满意.... 先硝酸破乳,再用聚合硫酸铁(PFS)和阳离子聚丙烯酰胺(PAM)复合处理废切削液,当pH为8.0,PFS和PAM的用量分别是1 800mg.L-1和8mg.L-1时混凝效果较好.混凝上清液用UV/H2O2/Fe2+系统氧化,当pH=3,分4次加入H2O2,紫外照射6.5h,结果令人满意.采用该工艺处理废切削液,其COD去除率为99.5%,脱色率100%,出水达到了国家《污水综合排放标准》(GB-8987-1996)一级标准. 展开更多
关键词 破乳 混凝 光催化化学氧化 切削液 UV/HO2/Fe^2+
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生物活性污泥法与化学光催化法对含酚废水处理的比较 被引量:1
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作者 贾海霞 胡瑞生 +2 位作者 白雅琴 蔡丽 苏海全 《现代化工》 CAS CSCD 北大核心 2009年第S2期231-234,共4页
含酚废水是近年来工业生产所产生的主要废水之一,对环境和生物均有严重的危害。介绍了低浓度含酚废水处理方法中的生物活性污泥法与化学光催化法,并对其反应机理、工艺过程及其近期发展情况进行了介绍,并提出今后的发展方向。
关键词 生物活性污泥法 化学光催化 废水处理
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木质素光催化转化反应工艺的综述
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作者 张得伟 李敏 +3 位作者 马修强 郝坤 范启明 宋亮 《山东化工》 CAS 2019年第9期97-100,共4页
本文主要总结了不同催化反应体系下各木质素底物的解聚效率,并分别探讨了抑制光生载流子的复合、扩展光响应范围、h^+、e^-、OH·和O_2·^-等活性反应物种对木质素光催化反应的作用机理,指出了产物生成的选择性不易控制的不足,... 本文主要总结了不同催化反应体系下各木质素底物的解聚效率,并分别探讨了抑制光生载流子的复合、扩展光响应范围、h^+、e^-、OH·和O_2·^-等活性反应物种对木质素光催化反应的作用机理,指出了产物生成的选择性不易控制的不足,并对木质素的发展前景进行了展望。 展开更多
关键词 木质素 光催化化学 反应工艺 反应机理
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空调压缩机公司废切削液处理工艺研究 被引量:1
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作者 路小彬 程刚 陈敏 《科技经济市场》 2006年第1期16-18,共3页
采取先硝酸破乳,然后用聚硫酸铁(PFS)和阳离子聚丙烯酰胺(PAM)复合混凝废切削液,在pH为7.5时,PFS 和PAM的用量分别是1500mg·L^(-1)和8mg·L^(-1)时混凝效果较好。混凝后的废水再用UV/H_2O_2/Fe^(2+)系统氧化。当pH=3时, 分... 采取先硝酸破乳,然后用聚硫酸铁(PFS)和阳离子聚丙烯酰胺(PAM)复合混凝废切削液,在pH为7.5时,PFS 和PAM的用量分别是1500mg·L^(-1)和8mg·L^(-1)时混凝效果较好。混凝后的废水再用UV/H_2O_2/Fe^(2+)系统氧化。当pH=3时, 分四次加入H_2O_2,紫外照射6.5h,结果令人满意,经该方法处理的废切削液,其COD去除率为99.5%,脱色率100%,达到了国家《污水综合排放标准》(GB-8987-1996)二级标准。 展开更多
关键词 破乳 混凝 光催化化学氧化 切削液 UV/H2O2/Fe2+
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单晶碳化硅晶片高效超精密抛光工艺 被引量:9
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作者 何艳 苑泽伟 +1 位作者 段振云 张幼军 《哈尔滨工业大学学报》 EI CAS CSCD 北大核心 2019年第1期115-121,共7页
为改善现有碳化硅抛光方法存在的效率低、有污染、损伤大等问题,提出采用机械研磨与光催化辅助化学机械抛光组合工艺抛光单晶碳化硅晶片.光催化辅助化学机械抛光利用纳米二氧化钛在紫外光照射下生成羟基自由基的强氧化作用原子级去除碳... 为改善现有碳化硅抛光方法存在的效率低、有污染、损伤大等问题,提出采用机械研磨与光催化辅助化学机械抛光组合工艺抛光单晶碳化硅晶片.光催化辅助化学机械抛光利用纳米二氧化钛在紫外光照射下生成羟基自由基的强氧化作用原子级去除碳化硅.通过L9(33)正交试验研制光催化辅助化学机械抛光抛光液,采用对碳化硅晶片表面粗糙度跟踪检测的方法确定优化加工工艺.甲基紫有机显色剂静态氧化试验结果表明:光催化剂对抛光液氧化性的影响最大,其次是电子俘获剂,再次是分散剂;较好的抛光液配方为二氧化钛0.5 g獉L-1、过氧化氢1.5 mol獉L-1、六偏磷酸钠0.1 g獉L-1.确定的优化抛光工艺为:采用5μm和2μm金刚石微粉分别研磨单晶碳化硅晶片30 min,材料去除率分别为8.72μm/h和4.56μm/h;然后采用光催化辅助化学机械抛光单晶碳化硅去除机械研磨带来的损伤,粗抛光选用0.5μm氧化铝微粉抛光60 min,精抛光选用0.05μm氧化铝微粉抛光50 min,粗抛光和精抛光的材料去除率分别为1.81μm/h和1.03μm/h.用该工艺抛光单晶碳化硅,获得的表面粗糙度约为0.47 nm,基本能满足单晶碳化硅高效、超光滑、低损伤的抛光要求. 展开更多
关键词 碳化硅 抛光液 机械研磨 光催化辅助化学机械抛光 抛光工艺
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Photocatalytic activity of Fe-doped diopside 被引量:1
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作者 杨合 杨泽健 +2 位作者 韩冲 李强 薛向欣 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第12期3053-3058,共6页
UV-visible light induced photocatalytic degradation of methylene blue (MB) over Fe-doped diopside was investigated. The structure, composition, morphology and absorption property of UV-visible light of as-prepared sam... UV-visible light induced photocatalytic degradation of methylene blue (MB) over Fe-doped diopside was investigated. The structure, composition, morphology and absorption property of UV-visible light of as-prepared samples were characterized using XRD, SEM, FTIR and UV-vis DRS. The experimental results show that doping Fe3+ induced the formation of some new species in diopside, and promoted light adsorption property of diopside in UV-visible region. Photochemical reactivity of Fe-doped diopside obviously depended on the content of doping Fe3+. The diopside with 1.848% Fe3+ exhibited the superior photocatalytic activity with 95% degradation of MB under UV-visible light for 3 h. The photocatalytic degradation kinetics of MB over all samples showed the first-order reaction nature. 展开更多
关键词 DIOPSIDE methylene blue FE3+ PHOTOCATALYSIS photocatalytic activity KINETICS first-order reaction
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In situ electrochemical synthesis of MOF-5 and its application in improving photocatalytic activity of BiOBr 被引量:14
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作者 杨慧敏 刘宪 +3 位作者 宋秀丽 杨太来 梁镇海 樊彩梅 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第12期3987-3994,共8页
Metal-organic frameworks(MOFs) are important functional materials. MOF-5(IL)(Zn4O(BDC)3(BDC=1,4-benzenedicarboxylate) was in situ synthesized by the electrochemical method using a tunable ionic liquid(IL), ... Metal-organic frameworks(MOFs) are important functional materials. MOF-5(IL)(Zn4O(BDC)3(BDC=1,4-benzenedicarboxylate) was in situ synthesized by the electrochemical method using a tunable ionic liquid(IL), 1-butyl-3-methylimidazolium chloride, as template. The crystallization of distinctly spherical MOF-5(IL) synthsized in ionic liquid by the electrochemical method is attributed to π-π stacking effect, ionic bond, and coordination bond. The analysis results show that the product MOF-5(IL) exhibits better crystallinity and higher thermal stability than MOF-5 generated using the solvothermal method. The cyclic voltammetry reveals that the electrosynthesis reaction is irreversible and controlled by the diffusion. The experiments on methylorange degradation show that the unique structure characteristics of MOF-5(IL) can enhance the photocatalytic ability of Bi OBr. Therefore, MOFs can replace noble metals to improve the photocatalytic properties of bismuth oxyhalide. 展开更多
关键词 metal-organic framewok(MOF) ionic liquids template agent in situ electrochemical synthesis Bi OBr PHOTOCATALYTIC
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二维纳米材料MXenes的性质及应用研究进展 被引量:9
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作者 王剑 周榆力 《西华大学学报(自然科学版)》 CAS 2020年第3期76-89,共14页
二维层状过渡金属碳/氮化物(MXenes)以其独特的晶体特征和结构特性受到越来越多的关注,尤其是在能源、催化、环境等领域的应用中体现出优异的性能。本文系统地综述MXenes独特的稳定性、机械性能、电子性质、磁性质、光学性质、热电性能... 二维层状过渡金属碳/氮化物(MXenes)以其独特的晶体特征和结构特性受到越来越多的关注,尤其是在能源、催化、环境等领域的应用中体现出优异的性能。本文系统地综述MXenes独特的稳定性、机械性能、电子性质、磁性质、光学性质、热电性能、铁电及压电性质,同时总结分析MXenes在电池领域、电化学电容器领域及催化领域的应用所取得的最新进展及研究成果,最后对MXenes及其复合材料的未来发展前景及面临的挑战进行探讨。 展开更多
关键词 二维纳米材料 过渡金属碳/氮化物 MXenes 物理化学性质 化学储能领域 化学/光催化领域
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基于纳米技术的钼丝镀金实验研究
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作者 扈春鹤 魏巧莲 《广东化工》 CAS 2014年第7期74-75,共2页
以n-TiO2-film/Mo为基体,采用光催化化学镀法制备了Au/n-TiO2-film/Mo,并就还原剂用量以及光照时间对镀金液的稳定性以及镀金速率进行了研究。经试验得到合适的光照条件以及光催化镀金液配方,且制备的镀金钼丝表面覆盖的金层与基体具有... 以n-TiO2-film/Mo为基体,采用光催化化学镀法制备了Au/n-TiO2-film/Mo,并就还原剂用量以及光照时间对镀金液的稳定性以及镀金速率进行了研究。经试验得到合适的光照条件以及光催化镀金液配方,且制备的镀金钼丝表面覆盖的金层与基体具有良好的结合力。 展开更多
关键词 光催化化学 镀金液稳定性 镀金速率
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Preparation of Zr-doped CaTiO_3 with enhanced charge separation efficiency and photocatalytic activity 被引量:1
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作者 黄晓俊 严欣 +5 位作者 吴海燕 方莹 闵亚红 李文生 王双印 吴振军 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第2期464-471,共8页
A series of Zr-doped CaTiO3 powders were prepared with the mild co-precipitation method and calcined at 850℃ for 3 h. The as-prepared Zr-doped CaTiO3 samples were characterized by scanning electron microscopy (SEM)... A series of Zr-doped CaTiO3 powders were prepared with the mild co-precipitation method and calcined at 850℃ for 3 h. The as-prepared Zr-doped CaTiO3 samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Vis diffuse reflectance spectra (DRS) and X-ray photoelectron spectra (XPS). XRD result revealed the presence of single perovskite phase of CaTiO3. UV-Vis diffusive reflection spectra of Zr-doped CaTiO3 indicated that the absorbance obviously increased in the visible light irradiation. XPS analysis showed that two types of oxygen existed on the photocatalyst surface, including lattice oxygen and absorbed oxygen. Their photocatalytic activity in the case of the degradation of methyl orange in water and photoelectrochemical activity were also tested. The 5%Zr-doped (mole fraction) CaTiO3 sample showed the highest photocatalytic activity. The enhanced photocatalytic activity was ascribed to the change of the lattice structure, existence of oxygen vacancies and increase of the photogenerated charge separation efficiency. 展开更多
关键词 CATIO3 ZR doping CO-PRECIPITATION PHOTOCATALYSIS PHOTOELECTROCHEMISTRY
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Engineering vacancies for solar photocatalytic applications 被引量:5
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作者 Mingce Long Longhui Zheng 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2017年第4期617-624,共8页
In contrast to the exploration of novel photocatalytic materials,vacancy engineering of traditionalphotocatalysts comprising earth‐abundant elements represents an effective method for enhancingphotocatalytic performa... In contrast to the exploration of novel photocatalytic materials,vacancy engineering of traditionalphotocatalysts comprising earth‐abundant elements represents an effective method for enhancingphotocatalytic performance without introducing alien elements.This minireview analyzes the latestprogress in engineering vacancies in photocatalysts,remarks on state‐of‐the‐art characterizationtechniques for vacancies,and reviews the formation chemistry and fundamental benefits of anionand cation vacancies in typical photocatalysts.Although knowledge of these vacancies is increasing,challenges remain in this field,and possible further research is therefore also discussed. 展开更多
关键词 Oxygen vacancy Hydrogenated treatment PHOTOCATALYSIS CHEMISORPTION Titanium vacancy
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Photocatalytic H2 generation via CoP quantum-dot-modified g-C3N4 synthesized by electroless plating 被引量:11
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作者 Kezhen Qi Wenxiu Lv +1 位作者 Iltaf Khan Shu-yuan Liu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第1期114-121,共8页
Photocatalytic water splitting is a promising method for hydrogen production.Numerous efficient photocatalysts have been synthesized and utilized.However,photocatalysts without a noble metal as the co-catalyst have be... Photocatalytic water splitting is a promising method for hydrogen production.Numerous efficient photocatalysts have been synthesized and utilized.However,photocatalysts without a noble metal as the co-catalyst have been rarely reported.Herein,a CoP co-catalyst-modified graphitic-C3N4(g-C3N4/CoP)is investigated for photocatalytic water splitting to produce H2.The g-C3N4/CoP composite is synthesized in two steps.The first step is related to thermal decomposition,and the second step involves an electroless plating technique.The photocatalytic activity for hydrogen evolution reactions of g-C3N4 is distinctly increased by loading the appropriate amount of CoP quantum dots(QDs).Among the as-synthesized samples,the optimized one(g-C3N4/CoP-4%)shows exceptional photocatalytic activity as compared with pristine g-C3N4,generating H2 at a rate of 936μmol g^-1 h^-1,even higher than that of g-C3N4 with 4 wt%Pt(665μmol g^-1 h^-1).The UV-visible and optical absorption behavior confirms that g-C3N4 has an absorption edge at 451 nm,but after being composited with CoP,g-C3N4/CoP-4%has an absorption edge at 497 nm.Furthermore,photoluminescence and photocurrent measurements confirm that loading CoP QDs to pristine g-C3N4 not only enhances the charge separation,but also improves the transfer of photogenerated e--h+pairs,thus improving the photocatalytic performance of the catalyst to generate H2.This work demonstrates a feasible strategy for the synthesis of highly efficient metal phosphide-loaded g-C3N4 for hydrogen generation. 展开更多
关键词 Photocatalysis CoP quantum dots Electroless plating H2 generation g-C3N4
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ZnIn_2S_4 flowerlike microspheres embedded with carbon quantum dots for efficient photocatalytic reduction of Cr(Ⅵ) 被引量:7
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作者 Baibai Liu Xinjuan Liu +6 位作者 Lei Li Jianwei Li Can Li Yinyan Gong Lengyuan Niu Xinsheng Zhao Chang Q.Sun 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第12期1901-1909,共9页
Development of efficient heterostructured photocatalysts that respond to visible light remains a considerable challenge.We herein show the synthesis of ZnIn2S4/carbon quantum dot hybrid photocatalysts with flowerlike ... Development of efficient heterostructured photocatalysts that respond to visible light remains a considerable challenge.We herein show the synthesis of ZnIn2S4/carbon quantum dot hybrid photocatalysts with flowerlike microspheres via a facile solvothermal method.The ZnIn2S4/carbon quantum dot flowerlike microspheres display enhanced photocatalytic and photoelectrochemical activity compared with that of pure ZnIn2S4.With a content of only 0.5 wt%carbon quantum dots,93%of Cr(VI)is reduced under visible‐light irradiation at 40 min.As a co‐catalyst,the carbon quantum dots improve the light absorption and lengthen the lifetime of charge carriers,consequently enhancing the photocatalytic and photoelectrochemical activity. 展开更多
关键词 ZnIn2S4 Carbon quantum dots Flowerlike microspheres Co‐catalyst Photoelectronchemical
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Facile synthesis and photoelectrochemical properties of novel TiN/C3N4/CdS nanotube core/shell arrays 被引量:2
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作者 Changzhi Ai Li Tong +5 位作者 Zhipeng Wang Xidong Zhang Guizhen Wang Shengjue Deng Jin Li Shiwei Lin 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第10期1645-1653,共9页
Recently, the g-C3N4-based heterojunctions have been widely investigated for their greatly enhanced photogenerated carrier separation efficiency. However, most studies are based on the study of g-C3N4 powders. In this... Recently, the g-C3N4-based heterojunctions have been widely investigated for their greatly enhanced photogenerated carrier separation efficiency. However, most studies are based on the study of g-C3N4 powders. In this study, a novel TiN/C3N4/CdS nanotube arrays core/shell structure is designed to improve the photoelectrochemical catalytic performance of the g-C3N4-based heterojunctions. Among them, TiN nanotube arrays do not respond to simulated solar light, and thus only serve as an excellently conductive nanotube arrays backbone for supporting g-C3N4/CdS heterojunctions. g-C3N4 prepared by simple liquid atomic layer deposition, which possesses appropriate energy band position, mainly acts as the electron acceptor to transport and separate electrons. Deposited CdS quantum dots obtained by successive ionic layer adsorption reaction can effectively absorb visible light and thus act as a light absorber. The TiN/C3N4/CdS nanotube arrays core/shell structure could be verified by X-ray diffractions, Raman spectra, scanning electron microscopy, transmission electron microscopy, energy dispersive spectroscopy elemental mappings and X-ray photoelectron spectroscopy. Compared with TiN/C3N4 nanotube arrays, the TiN/C3N4/CdS samples greatly improve the photoelectrochemical performance, which can be evaluated by photoelectrochemical tests and photoelectrochemical catalytic degradation. Especially, the optimized photocurrent density of TiN/C3N4/CdS has almost 120 times improvement on TiN/C3N4 at 0 V bias under simulated sunlight, which can be ascribed to the effective expansion of the light absorption range and separation of electron-hole pairs. 展开更多
关键词 TIN g-C3N4/CdS PEC catalysis Degradation Nanotube arrays
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Catalytic effects of [Ag(H_2O)(H_3PW_(11)O_(39))]^(3-)on a TiO_2 anode for water oxidation 被引量:1
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作者 Jiansheng Li Lei Wang +3 位作者 Wansheng You Meiying Liu Lancui Zhang Xiaojing Sang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第3期534-541,共8页
A[H3AgI(H2O)PW11O39]3?‐TiO2/ITO electrode was fabricated by immobilizing a molecular polyoxometalate‐based water oxidation catalyst,[H3AgI(H2O)PW11O39]3?(AgPW11),on a TiO2electrode.The resulting electrode was charac... A[H3AgI(H2O)PW11O39]3?‐TiO2/ITO electrode was fabricated by immobilizing a molecular polyoxometalate‐based water oxidation catalyst,[H3AgI(H2O)PW11O39]3?(AgPW11),on a TiO2electrode.The resulting electrode was characterized by X‐ray powder diffraction,scanning electron microscopy,and energy dispersive X‐ray spectroscopy.Linear sweep voltammetry,chronoamperometry,and electrochemical impedance measurements were performed in aqueous Na2SO4solution(0.1molL?1).We found that a higher applied voltage led to better catalytic performance by AgPW11.The AgPW11‐TiO2/ITO electrode gave currents respectively10and2.5times as high as those of the TiO2/ITO and AgNO3‐TiO2/ITO electrodes at an applied voltage of1.5V vs Ag/AgCl.This result was attributed to the lower charge transfer resistance at the electrode‐electrolyte interface for the AgPW11‐TiO2/ITO electrode.Under illumination,the photocurrent was not obviously enhanced although the total anode current increased.The AgPW11‐TiO2/ITO electrode was relatively stable.Cyclic voltammetry of AgPW11was performed in phosphate buffer solution(0.1mol L?1).We found that oxidation of AgPW11was a quasi‐reversible process related to one‐electron and one‐proton transfer.We deduced that disproportionation of the oxidized[H2AgII(H2O)PW11O39]3?might have occurred and the resulting[H3AgIIIOPW11O39]3?oxidized water to O2. 展开更多
关键词 Water oxidation ELECTROCATALYSIS PHOTOELECTROCHEMISTRY TIO2 POLYOXOMETALATE Ag+ complex
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Photoelectrocatalysis for high‐value‐added chemicals production 被引量:2
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作者 Yucong Miao Mingfei Shao 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第3期595-610,共16页
Photoelectrocatalysis(PEC)is a promising approach that can convert renewable solar energy into chemical energy,while most concern is concentrated on PEC water splitting to obtain high‐value‐added fuel—hydrogen.In p... Photoelectrocatalysis(PEC)is a promising approach that can convert renewable solar energy into chemical energy,while most concern is concentrated on PEC water splitting to obtain high‐value‐added fuel—hydrogen.In practice,more economic benefits can be produced based on PEC technique,such as H_(2)O oxidative H_(2)O_(2) synthesis,organic selective oxidation,organic pollutants degradation and CO_(2) reduction.Although there are plenty of excellent reviews focusing on the PEC water splitting system,the production of various high‐value‐added chemicals in PEC systems has not been discussed synthetically.This Account will focus on the production process of various high‐value‐added chemicals through PEC technology.The photoelectrode design,reaction environment and working mechanisms of PEC systems are also discussed in detail.We believe that this comprehensive Account of the expanded application of photoelectrocatalysis can add an inestimable impetus to the follow‐up development of this technology. 展开更多
关键词 PHOTOELECTROCATALYSIS High‐value‐added chemicals PHOTOELECTRODE Organic oxidation Carbon dioxide reduction
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Recent progress in production and usage of hydrogen peroxide 被引量:10
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作者 Shunichi Fukuzumi Yong-Min Lee Wonwoo Nam 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第8期1241-1252,共12页
Hydrogen peroxide has attracted increasing interest as an environmentally benign and green oxidant that can also be used as a solar fuel in fuel cells.This review focuses on recent progress in production of hydrogen p... Hydrogen peroxide has attracted increasing interest as an environmentally benign and green oxidant that can also be used as a solar fuel in fuel cells.This review focuses on recent progress in production of hydrogen peroxide by solar-light-driven oxidation of water by dioxygen and its usage as a green oxidant and fuel.The photocatalytic production of hydrogen peroxide is made possible by combining the e^(-)and 4e-oxidation of water with the e^(-)reduction of dioxygen using solar energy.The catalytic control of the selectivity of the e^(-)vs.4e-oxidation of water is discussed together with the selectivity of the e^(-)vs.4e-reduction of dioxygen.The combination of the photocatalytic e^(-)oxidation of water and the e^(-)reduction of dioxygen provides the best efficiency because both processes afford hydrogen peroxide.The solar-light-driven hydrogen peroxide production by oxidation of water and by reduction of dioxygen is combined with the catalytic oxidation of substrates with hydrogen peroxides,in which dioxygen is used as the greenest oxidant. 展开更多
关键词 Hydrogen peroxide production Water oxidation Dioxygen reduction Photocatalytic oxygenation Reaction kinetics and mechanism
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Photochemical route for preparing atomically dispersed Pd_1/TiO_2 catalysts on(001)-exposed anatase nanocrystals and P25 被引量:8
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作者 Pengxin Liu Jie Chen Nanfeng Zheng 《Chinese Journal of Catalysis》 CSCD 北大核心 2017年第9期1574-1580,共7页
Atomically dispersed catalysts have shown promising prospects in catalysis studies.Among all of the developed methods for synthesizing atomically dispersed catalysts,the photochemical approach has recently aroused muc... Atomically dispersed catalysts have shown promising prospects in catalysis studies.Among all of the developed methods for synthesizing atomically dispersed catalysts,the photochemical approach has recently aroused much attention owing to its simple procedure and mild preparation conditions involved.In the present study,we demonstrate the application of the photochemical method to synthesize atomically dispersed Pd catalysts on(001)‐exposed anatase nanocrystals and commercial TiO2(P25).The as‐prepared catalysts exhibit both high activity and stability in the hydrogenation of styrene and catalytic oxidation of CO. 展开更多
关键词 Single‐atom catalyst Photochemical preparation Ultraviolet‐assisted preparation Styrene hydrogenation Carbon monoxide oxidation
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Effect of high-voltage discharge non-thermal plasma on g-C_3N_4 in a plasma-photocatalyst system 被引量:3
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作者 Xiaoping Wang Yixia Chen +2 位作者 Min Fu Zihan Chen Qiulin Huang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第10期1672-1682,共11页
The synergistic effect of high voltage discharge non‐thermal plasma(NTP)and photocatalysts on contaminant removal has repeatedly confirmed by plenty of researches.Most previous plasma‐photocatalyst synergistic syste... The synergistic effect of high voltage discharge non‐thermal plasma(NTP)and photocatalysts on contaminant removal has repeatedly confirmed by plenty of researches.Most previous plasma‐photocatalyst synergistic systems focused on the utilization of the ultraviolet light but ignored the visible light generated by high voltage discharge.Graphitic carbon nitride(g‐C3N4),a metal‐free semiconductor that exhibits high chemical stability,can utilize both the ultraviolet and visible light from high voltage discharge.However,the synergistic system of NTP and g‐C3N4 has been researched little.In this paper,the effect of NTP generated by dielectric barrier discharge(DBD)on g‐C3N4 is studied by comparing the photocatalytic activities,the surface physical structure and the surface chemical characteristics of pristine and plasma treated g‐C3N4.Experimental results indicate that the DBD plasma can change the physical structure and the chemical characteristics and to further affect the photocatalytic activity of g‐C3N4.The effect of NTP on g‐C3N4 is associated with the discharge intensity and the discharge time.For a long time scale,the effect of NTP on g‐C3N4 photocatalysts presents a periodic change trend. 展开更多
关键词 g‐C3N4 Non‐thermal plasma Photocatalytic activity Physical structure Chemical characteristic
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Photocatalytic conversion of waste plastics to low carbon number organic products 被引量:3
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作者 Kaiyi Su Huifang Liu +1 位作者 Chaofeng Zhang Feng Wang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第3期589-594,共6页
As a great threat to all livings on earth,waste artificial plastics now are everywhere,from oceans to our cells[1].The world cannot withstand the growing waste plastic in million tonnes every year,which has already ca... As a great threat to all livings on earth,waste artificial plastics now are everywhere,from oceans to our cells[1].The world cannot withstand the growing waste plastic in million tonnes every year,which has already caused environmental pollution and economic losses[2].Besides the efforts for preparing novel plastics with the self‐decomposition ability,methods are needed to clear away these waste plastics leftover from history or recycle well this organic carbon resource[3].Photocatalysis is a potential solution for the conversion of waste plastics under mild conditions.In this perspective,we highlight the effect of photocatalytic approaches toward the generation of low carbon number organic products(C_(n) products,n≤8)from waste plastics,which can proceed under an inert or aerobic atmosphere.Notably,critical analysis of the carbon source in products is necessary to reveal the active species for the C–X bonds(X=C,N,and O)cleavage of plastics.Finally,we outline potential avenues for further development of this emerging field to enhance the yield of C_(n)(n≤8)products from waste plastics. 展开更多
关键词 PHOTOCATALYSIS PLASTICS C–C bond cleavage Fuel CHEMICALS
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