共查询到18条相似文献,搜索用时 171 毫秒
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采用水热法制备得到颗粒状MIL-101(Cr)-NH2,随后用油浴法将ZnIn2S4纳米片原位生长均匀分散在MIL-101(Cr)-NH2表面,成功制得ZnIn2S4/MIL-101(Cr)-NH2光催化材料.通过X射线衍射(XRD),扫描电镜(SEM),固体紫外-可见漫反射光谱(UV-Vis DRS)和傅立叶红外光谱... 相似文献
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银、氟双元素改性TiO2光催化材料的性能 总被引:1,自引:0,他引:1
以多孔泡沫镍为载体,采用水热合成法制备了Ag修饰和Ag-F共改性多孔TiO2光催化材料,用多种方法对其进行了表征,并评价了其对水中罗丹明B的降解性能. 罗丹明B的光催化降解反应符合零级动力学规律,TiO2中主要成分为锐钛矿型纳米TiO2晶体,经500℃煅烧0.5 h后光催化性能提高. Ag修饰TiO2的光催化性能随Ag修饰量的增加先升高后下降,Ag修饰量大于0.6%时,其光催化性能又提高,最佳Ag修饰量为1.2%. 煅烧处理使样品的光催化性能提高,当Ag修饰量为0.8%时,其光催化性能最优. 1.2% Ag和2.0% F共改性的多孔光催化材料的光催化性能远优于单一Ag修饰材料. 相似文献
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以溴代十六烷基吡啶(CPBr)为模板剂,采用水热法制备出系列Mn2+掺杂的ZnIn2S4多孔光催化剂.通过XHD、FESEM、UV-Vis、XPS等分析手段对催化剂进行了表征,考察了掺杂Mn2+浓度对多孔ZnIn2S4光催剂的形貌结构和可见光催化产氢性能的影响.实验结果表明,Mn2+掺杂影响催化剂的晶体结构及其微观形貌... 相似文献
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二氧化钛光催化氧化技术的研究进展 总被引:3,自引:0,他引:3
在阐明光催化氧化反应机理的基础上分析了国内外TiO2光催化氧化反应的研究现状。提出目前国内外主要是从TiO2负载基材、TiO2光催化剂的修饰、改性以及TiO2光催化反应的影响参数几个方面进行研究,指出某些掺杂金属或非金属的TiO2光催化剂可使TiO2薄膜的吸光范围拓宽至可见光区,具有良好的应用前景。 相似文献
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硫脲为改性剂,P25为改性对象,采用研磨-共煅烧的方法制备了具有可见光催化活性的硫改性P25(S-P25)。利用XPS能谱、拉曼光谱、紫外-可见吸收光谱和元素分析等测试手段对其结构、光谱性质进行了表征。结果表明,S以S4+和S2-的形式分别替换了P25中的少量晶格Ti4+和O2-,光响应波长范围扩大,紫外、可见光区均产生较强吸收。以亚甲基蓝水溶液的光催化降解为模型反应,评价了该催化剂在可见光照射下的光催化活性,500℃煅烧2 h得到的试样的可见光活性最佳。 相似文献
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采用水热法制备出系列Cu2+掺杂的ZnIn2S4多孔光催化剂。通过XRD、SEM、UV-Vis、XPS等分析手段对催化剂进行了表征,考察了掺杂Cu2+浓度对多孔ZnIn2S4光催剂的形貌结构和可见光催化产氢性能的影响。实验结果表明,Cu2+掺杂会影响催化剂的晶体结构及其微观形貌,掺杂后的Zn In2S4光催化剂产氢活性显著提高,其中Cu2+(0.1%)-Zn In2S4光催化剂表现出最优产氢活性,产氢速率达到1967.4μmol/(h·g)。 相似文献
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In this paper, ZnIn(2)S(4) perpendicular nanosheet films have been directly deposited on FTO substrates by a facile hydrothermal method and investigated as the electrode materials for solar cells. The crystal structure, morphology, and optical properties of the obtained ZnIn(2)S(4) films were characterized by measurements such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive spectrum (EDS), X-ray photoelectron spectrum (XPS) and UV-vis spectra. The results revealed a uniform perpendicular ZnIn(2)S(4) film with thickness of 4 μm and with an average nanosheet thickness of about 30 nm on FTO substrate, along with the band gap of 2.35 eV. The reaction conditions influencing the formation of ZnIn(2)S(4) films, such as the substrate treatment and reaction time were investigated. A possible mechanism for the formation of ZnIn(2)S(4) films on FTO substrates under hydrothermal conditions has been proposed. Furthermore, after heat treatment, the ZnIn(2)S(4) film electrode exhibited a photoelectrical conversion efficiency of 0.23% in FTO/ZnIn(2)S(4)/polysulfide/Au liquid-junction solar cell under AM 1.5 (100 mW cm(-2)). 相似文献
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以十六烷基三甲基溴化铵(CTAB)为模板剂,采用微波-水热法制备了多孔ZnIn2S4光催化剂,通过XRD、SEM、UV-Vis、EDS等分析手段对催化剂的晶型结构、形貌及化学组成进行了表征。考察了模板剂浓度、pH值、微波时间与温度对多孔ZnIn2S4光催化剂形貌结构及催化降解甲基橙的影响。制备的最佳条件为:CTAB模板剂的加入量为0.54g、pH值为2.0、温度为140℃、时间为1.0h。当催化剂用量为0.01g,催化降解甲基橙降解率可达64.3%。 相似文献
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Basaleh A. S. Amin M. S. Mahmoud M. H. H. 《Journal of Inorganic and Organometallic Polymers and Materials》2021,31(9):3829-3841
Journal of Inorganic and Organometallic Polymers and Materials - The present work offers beneficial method for Hg (II) elimination from aqueous solution. ZnIn2S4/g-C3N4 nanocomposites were... 相似文献
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纳米TiO_2光催化剂的改性进展 总被引:1,自引:0,他引:1
较低的光量子效率是限制TiO2光催化技术实用化的主要原因,对其改性是提高TiO2光量子效率的重要手段。介绍了采用掺杂过渡金属、表面光敏化、表面螯合及衍生、贵金属沉积、复合半导体和添加电子捕获剂等方法对TiO2光催化剂进行改性,并对这些方面研究所取得的进展进行了简单的评述。 相似文献
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Jing Ma Shangyuan Xu Jia Chu Juanqin Xue Jieli Tang Liangsheng Qiang 《Journal of Porous Materials》2017,24(1):45-54
In this paper, a series of metal supported TiO2/SBA-16 photocatalysts were successfully synthesized by wet impregnation method. The synthesized samples were characterized by X-ray diffraction (XRD), Raman spectra, N2 adsorption–desorption, transmission electron microscopy (TEM), UV–visible absorption spectra (UV-vis) and X-ray photoelectron spectroscopy (XPS). It was found that SBA-16 retained the ordered mesostructure after modification. The results shown that loading different metal elements was found to have significant influences on the crystallographic structure and physical properties. Moreover, the prepared materials were evaluated on photodegradation of Rhodamine B (RhB). Experiment results showed that the degradation of RhB by these catalysts follows the pseudo-first-order kinetic model. The effect of metal element on photocatalytic activity can be attributed that the appropriate amounts of metal concentration can enhance the photocurrent due to the reduced electron–hole recombination, which can improve the efficiency of photocatalytic reactions. 相似文献