Tuning of metal oxides photocatalytic performance using Ag nanoparticles integration
Tuning of metal oxides photocatalytic performance using Ag nanoparticles integration
复制标题
DOI：
10.1016/j.molliq.2020.113588
复制
发表时间：
2020-09-15
影响因子：
6
通讯作者：
Karimi, Fatemeh
中科院分区：
文献类型：
--
作者：
Karimi-Maleh, Hassan;Kumar, Baskaran Ganesh;Karimi, Fatemeh
水污染在发展中国家和欠发达国家日益成为一个重要问题。水污染的主要原因是工业染料和有毒化学品。因此，正在开发许多技术来去除有毒物质的污染。光催化降解染料是一种简单有效的水净化技术。在各种光催化剂中，过渡金属基氧化物（TiO 2、NiO和ZnO）是最先进的光催化材料。但是，金属氧化物具有大的带隙，并且遭受其主要吸收紫外线区域的辐射的事实。但是，任何可行的光催化技术都需要在可见光区域中吸收，以便利用免费的太阳光。在此，我们通过整合Ag金属纳米颗粒来调整和利用金属氧化物。利用PXRD、HRTEM、UV、XPS和BET等仪器对合成材料进行了全面的分析。所有的TiO 2/Ag，NiO/Ag和ZnO/Ag纳米复合材料进行光催化降解使用可见光。该纳米复合材料作为光催化剂，降解彩色的甲基橙子和无色有毒的4-氯苯酚。在上述三种样品中，TiO 2/Ag表现出最好的性能比ZnO/Ag和NiO/Ag。我们归因于光催化活性的增强，由于等离子体激元辅助和纳米级制度的光催化剂。总之，我们使用Ag纳米颗粒表面等离子体共振来调节金属氧化物的光催化性能。(C)2020爱思唯尔B. V.保留所有权利。
Water contamination is increasingly an important issue in developing and under developed countries. The main cause of water contaminations are industrial dyes and toxic chemicals. Hence many technologies are being developed to de-contaminate the toxic materials. The photocatalytic de-contamination of dyes is an effective and simple technology to purify water. Among various photocatalysts, the transition metal based oxides (TiO2, NiO and ZnO) being the state-of art photocatalytic material. But, the metal oxides have large band gap and suffers from the fact that it predominantly absorbs the Ultra Violet region of irradiation. But, any viable photocatalytic technology demands absorption in the visible light region, so as to utilize the cost-free sun light. Herein, we tune and utilize the metal oxides through the integration of Ag metal nanopartides. The synthesized materials were completely analyzed by PXRD, HRTEM, UV, XPS and BET instruments. All TiO2/Ag, NiO/Ag and ZnO/Ag nanocomposites were subjected to photocatalytic degradation using visible light. The nanocomposites acted as photocatalyst and degrade the colorful methyl orange and colorless toxic 4-chlorophenol. Among the aforementioned three samples, TiO2/Ag exhibited best performance than ZnO/Ag and NiO/Ag. We attributed the enhancement of photocatalytic activity due to Plasmons assistance and nanoscale regime of photocatalyst. In summary, we tuned the metal oxide photocatalytic performance using the Ag nanoparticle surface Plasmon resonance. (C) 2020 Elsevier B.V. All rights reserved.