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首页> 外文期刊>Applied Surface Science >Fabrication of Ag_2O/TiO_2 composites on nanographene platelets for the removal of organic pollutants: Influence of oxidants and inorganic anions
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Fabrication of Ag_2O/TiO_2 composites on nanographene platelets for the removal of organic pollutants: Influence of oxidants and inorganic anions

机译：在纳米石墨烯薄片上制备Ag_2O / TiO_2复合材料以去除有机污染物：氧化剂和无机阴离子的影响

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Ternary Ag2O/TiO2anographene platelet (Ag2O/TiO2/NGP) composites containing various amounts of NGP were synthesized using a microwave-assisted method and were used as catalysts for degradation of organic dyes in aqueous solution. The composites were characterized by various methods, and their photocatalytic performance was systematically investigated with respect to degradation of methylene blue. Compared with pure TiO2 and Ag2O nanoparticles as well as Ag2O/TiO2 composites, the Ag2O/TiO2/NGP composites exhibited superior photocatalytic performance in the UV and visible light range. The results also indicated that Ag2O/TiO2/NGP composites could be used as efficient broad-spectrum catalysts for the removal of several dye contaminants in aqueous solutions. The correlation between photocatalytic mechanism and physical properties of the catalysts was discussed. The effects of the addition of hydrogen peroxide (H2O2) and persulfate on MB degradation were also investigated. Photocatalytic efficiency was noticeable in the presence of both oxidizers. Because inorganic anions are common substances in natural water, their influence was also evaluated. They were found to inhibit the catalytic activity of Ag2O/TiO2/NGP composites. Their effectiveness in inhibiting photocatalytic degradation of MB was CO32- NO3- HPO4- Cl- SO42-.
机译：采用微波辅助法合成了含有不同量NGP的三元Ag2O / TiO2 /纳米石墨片（Ag2O / TiO2 / NGP）复合材料，并作为催化剂降解水溶液中的有机染料。通过多种方法对复合材料进行了表征，并对亚甲基蓝的降解性能进行了系统的研究。与纯TiO2和Ag2O纳米颗粒以及Ag2O / TiO2复合材料相比，Ag2O / TiO2 / NGP复合材料在紫外和可见光范围内均表现出优异的光催化性能。结果还表明，Ag2O / TiO2 / NGP复合材料可作为有效的广谱催化剂，用于去除水溶液中的几种染料污染物。讨论了光催化机理与催化剂物理性质之间的关系。还研究了添加过氧化氢（H2O2）和过硫酸盐对MB降解的影响。在两种氧化剂的存在下，光催化效率都很明显。由于无机阴离子是天然水中的常见物质，因此还评估了它们的影响。发现它们抑制了Ag2O / TiO2 / NGP复合材料的催化活性。它们抑制MB的光催化降解的有效性为CO32-> NO3-> HPO4-> Cl-> SO42-。

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