Department of Chemistry, Dongguk University, Seoul, 04620, South Korea; Institue of Green Chemistry and Chemical Technology, Jiangsu University, Zhenjiang, 212013, China.
Department of Physics, Dongguk University, Seoul, 04620, South Korea.
Chemosphere. 2021 Jul;275:130052. doi: 10.1016/j.chemosphere.2021.130052. Epub 2021 Feb 23.
In this study, we report the construction of a novel composite photocatalyst (BiVO/rGH) composed of quantum dots (QDs) self-decorated BiVO-nanoparticels (NPs) and reduced graphene hydrogel (rGH). The composite structures were prepared using an in-situ growth method. The BiVO/rGH composite photocatalysts exhibited excellent photocatalytic efficiency for the degradation of tetracycline hydrochloride (TCHCl). The promoted photocatalytic activity of the BiVO/rGH is attributed to the synergetic effects of the unique structure involving QDs self-decorated BiVO NPs and a 3D network structure of rGH, which resulted in higher number of photogenerated charge carriers, surplus active sites, and enhanced charge separation. In addition, trapping measurements showed that ·O and h, as the main active species, play a crucial role in the degradation of TCHCl over the composite photocatalyst. This study facilitates the design and construction of high efficiency hybrid photocatalysts with multifunctional materials for the removal of water pollutants.
在这项研究中，我们报告了一种新型复合光催化剂（BiVO/rGH）的构建，该催化剂由量子点（QDs）自修饰的 BiVO-纳米粒子（NPs）和还原氧化石墨烯水凝胶（rGH）组成。复合结构是通过原位生长法制备的。BiVO/rGH 复合光催化剂在降解盐酸四环素（TCHCl）方面表现出优异的光催化效率。BiVO/rGH 的光催化活性的提高归因于 QDs 自修饰的 BiVO NPs 和 rGH 的 3D 网络结构的协同作用，这导致了更多的光生载流子、过剩的活性位点和增强的电荷分离。此外，捕获测量表明，·O 和 h，作为主要的活性物种，在复合光催化剂上对 TCHCl 的降解起着关键作用。这项研究促进了具有多功能材料的高效混合光催化剂的设计和构建，以去除水中污染物。
