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Highly efficient visible-light-induced photoactivity of Z‑scheme Ag2CO3/Ag/WO3 photocatalysts for organic pollutant degradation
Environmental Science: Nano ( IF 7.3 ) Pub Date : 2017-09-08 00:00:00 , DOI: 10.1039/c7en00713b
Xingzhong Yuan 1, 2, 3, 4, 5 , Longbo Jiang 1, 2, 3, 4, 5 , Xiaohong Chen 6, 7, 8, 9 , Lijian Leng 1, 2, 3, 4, 5 , Hou Wang 1, 2, 3, 4, 5 , Zhibin Wu 1, 2, 3, 4, 5 , Ting Xiong 1, 2, 3, 4, 5 , Jie Liang 1, 2, 3, 4, 5 , Guangming Zeng 1, 2, 3, 4, 5
Affiliation  

A novel and efficient Z-scheme Ag2CO3/Ag/WO3 with excellent visible-light-driven photocatalytic performance was fabricated using a facile deposition and photochemical reduction process. Surface, morphological, and structural properties of the resulting materials were characterized using N2 sorption–desorption and Brunauer–Emmett–Teller (BET) surface area, scanning electron microscopy, transmission electron microscopy, X–ray diffraction, X–ray photoelectron spectroscopy, and UV−vis and photoluminescence spectroscopy. The photocatalytic performance of Ag2CO3/Ag/WO3 composites were evaluated by the degradation of rhodamine B (RhB), methyl orange (MO), ciprofloxacin (CIP), and tetracycline hydrochloride (TC) under visible light irradiation. The results demonstrate that the novel Z-scheme Ag2CO3/Ag/WO3 compositesexhibit higher photocatalytic activity than pure Ag2CO3 rods and WO3 nanoparticles. The enhanced photocatalytic activity of Ag2CO3/Ag/WO3 can be ascribed to extended absorption in the visible light region caused by surface plasmon resonance (SPR) effect, effective separation of photogenerated charges, formation of Z-scheme system. In addition, the photocatalyst exhibits high stability and reusability. This work could offer a new insight into the design and fabrication of advanced materials with Z-scheme structures for photocatalytic applications for organic pollutants removal from wastewater.

中文翻译:

Z方案Ag2CO3 / Ag / WO3光催化剂对有机污染物降解的高效可见光诱导的光活性

利用一种简便的沉积和光化学还原工艺,制备了一种新型的高效Z-方案Ag2CO3 / Ag / WO3,具有优异的可见光驱动的光催化性能。所得材料的表面,形态和结构特性使用N2吸附-解吸和Brunauer-Emmett-Teller(BET)表面积,扫描电子显微镜,透射电子显微镜,X射线衍射,X射线光电子能谱和紫外可见光谱和光致发光光谱。通过在可见光照射下若丹明B(RhB),甲基橙(MO),环丙沙星(CIP)和盐酸四环素(TC)的降解来评估Ag2CO3 / Ag / WO3复合材料的光催化性能。结果表明,新型的Z-方案Ag2CO3 / Ag / WO3复合材料比纯Ag2CO3棒和WO3纳米颗粒具有更高的光催化活性。Ag2CO3 / Ag / WO3的增强的光催化活性可以归因于表面等离振子共振(SPR)效应引起的可见光区域中的吸收扩展,光生电荷的有效分离,Z方案系统的形成。另外,光催化剂显示出高稳定性和可重复使用性。这项工作可以为具有Z方案结构的先进材料的设计和制造提供新的见解,这些材料可用于光催化应用中的废水中有机污染物的去除。Ag2CO3 / Ag / WO3的增强的光催化活性可以归因于表面等离振子共振(SPR)效应引起的可见光区域中的吸收扩展,光生电荷的有效分离,Z方案系统的形成。另外,光催化剂显示出高稳定性和可重复使用性。这项工作可以为具有Z方案结构的先进材料的设计和制造提供新的见解,这些材料可用于光催化应用中的废水中有机污染物的去除。Ag2CO3 / Ag / WO3的增强的光催化活性可以归因于表面等离振子共振(SPR)效应引起的可见光区域中的吸收扩展,光生电荷的有效分离,Z方案系统的形成。另外,光催化剂显示出高稳定性和可重复使用性。这项工作可以为具有Z方案结构的先进材料的设计和制造提供新的见解,这些材料可用于光催化应用中的废水中有机污染物的去除。
更新日期:2017-09-08
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