文献类型：期刊文献

英文题名：ZnO Nanoparticles Modified by Carbon Quantum Dots for the Photocatalytic Removal of Synthetic Pigment Pollutants

作者：Xu, Jing -Jing[1];Lu, Yi-Ning[1];Tao, Fei-Fei[1];Liang, Peng-Fei[1];Zhang, Ping-An[1]

机构：[1]Shaoxing Univ, Dept Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China

年份：0

外文期刊名：ACS OMEGA

收录：SCI-EXPANDED(收录号：WOS:000934871500001)、、Scopus(收录号：2-s2.0-85148471051)、WOS

基金：This work was supported by the National Natural Science Foundation of China (NSFC, Grant No. 51372154 and 20901051) and by the Zhejiang Provincial Natural Science Foundation of China under Grant No. LY21B010005. The authors thank Tong Li (Department of Chemistry and Chemical Engineering, Shaoxing University) for the help in the synthesis of the photocatalysts.

语种：英文

外文摘要：Synthetic pigment pollutants caused by the rapid development of the modern food industry have become a serious threat to people's health and quality of life. Environmentally friendly ZnO-based photocatalytic degradation exhibits satisfactory efficiency, but some shortcomings of large band gap and rapid charge recombination reduce the removal of synthetic pigment pollutants. Here, carbon quantum dots (CQDs) with unique up-conversion luminescence were applied to decorate ZnO nanoparticles to effectively construct the CQDs/ ZnO composites via a facile and efficient route. The ZnO nanoparticles with a spherical-like shape obtained from a zinc-based metal organic framework (zeolitic imidazolate framework-8, ZIF-8) were coated by uniformly dispersive quantum dots. Compared with single ZnO particles, the obtained CQDs/ZnO composites exhibit enhanced light absorption capacity, decreased photoluminescence (PL) intensity, and improved visible-light degradation for rhodamine B (RhB) with the large apparent rate constant (kapp). The largest kapp value in the CQDs/ZnO composite obtained from 75 mg of ZnO nanoparticles and 12.5 mL of the CQDs solution (similar to 1 mg center dot mL-1) was 2.6 times that in ZnO nanoparticles. This phenomenon may be attributed to the introduction of CQDs, leading to the narrowed band gap, an extended lifetime, and the charge separation. This work provides an economical and clean strategy to design visible-light-responsive ZnO-based photocatalysts, which is expected to be used for the removal of synthetic pigment pollutants in food industry.