Department of Chemistry, University of Agriculture, Faisalabad, 38040, Pakistan.
Department of Physics, University of Agriculture, Faisalabad, 38040, Pakistan.
Environ Sci Pollut Res Int. 2022 Jan;29(5):6552-6567. doi: 10.1007/s11356-021-16094-5. Epub 2021 Aug 28.
The increase in environmental pollution has led to an increased investigation in the development of novel ternary photocatalytic systems for remediation. These photocatalytic systems exhibit superior photocatalytic action for the removal of pollutants because of their visible light active bandgaps. A highly effective visible light active ternary heterojunction was fabricated using a hydrothermal method assisted by ultrasonication. Herein, we report the in situ hydrothermal synthesis of Mn-doped BiWOGO/ MoS photocatalyst, efficiently exhibiting greater photocatalytic activity for the wastewater treatment under solar light. The binary metal sulphide (MoS) used as a co-catalyst, acted as an electron collector and graphene oxide (GO) as a support material for interfacial electron transfer to and from bismuth tungstate and MoS. The as-prepared samples were characterized using SEM-EDX, FT-IR, XRD, XPS, BET, PL, and UV-Vis techniques. The bandgap of the novel photocatalyst was found in the visible region (2.2 eV) which helped in suppressing photoinduced electron-hole pairs recombination. The ternary Mn-doped BiWO-GO/MoS showed 99% methylene blue removal after 60 minutes of sunlight irradiation at the optimum conditions of pH 8, catalyst dose 50 mg/100ml, and initial MB concentration of 10ppm under sunlight irradiation. The doped ternary heterostructure has proved to be an effective sunlight-active photocatalyst that can be reused without substantial loss in photocatalytic efficiency.
环境污染的增加促使人们开发新型三元光催化体系以进行修复。这些光催化体系由于具有可见光活性的能带隙，表现出优异的光催化作用，可去除污染物。本文采用水热法结合超声辅助法制备了高效的可见光活性三元异质结。在此，我们报告了原位水热合成 Mn 掺杂的 BiWOGO/MoS 光催化剂，该催化剂在太阳光下处理废水时表现出更高的光催化活性。所使用的二元金属硫化物（MoS）作为共催化剂，充当电子收集器，氧化石墨烯（GO）作为界面电子从和向钨酸铋和 MoS 的转移的支撑材料。采用 SEM-EDX、FT-IR、XRD、XPS、BET、PL 和 UV-Vis 技术对所制备的样品进行了表征。新型光催化剂的带隙位于可见光区（2.2eV），有助于抑制光致电子-空穴对的复合。在最佳条件下（pH8、催化剂剂量 50mg/100ml、初始 MB 浓度为 10ppm），在太阳光照射下，三元 Mn 掺杂的 BiWO-GO/MoS 在 60 分钟内可将亚甲基蓝去除 99%。掺杂的三元异质结构已被证明是一种有效的阳光活性光催化剂，可重复使用，而光催化效率没有明显损失。
