Highly Efficient Photocatalytic Degradation of RhB and Inactivation of E. coli with CQDs/Bi2WO6 Composite and Its Enhanced Visible Light Photocatalytic Activity
ZHAO Yanyan1,*, FAN Jingyu1, WEI Jing1, SHI Huanxian2
1 College of Biology Pharmacy and Food Engineering, Shangluo University, Shangluo 726000, Shaanxi, China 2 School of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
Abstract: In this work, a CQDs/Bi2WO6 composite with good stability and outstanding photocatalytic activity was successfully prepared by doping CQDs. Fourier transform infrared spectroscopy(FTIR), X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), Scanning electron microscopy(SEM), transmission electron microscopy(TEM)and UV-visible diffuse reflection(UV-vis)were employed to characterize the prepared photocatalysts. The photocatalytic activity of CQDs/Bi2WO6 composite was evaluated by photodegradation of RhB, and the visible light driven photocatalytic inactivation of E. coli and the possible bactericidal mechanisms were also studied. The results indicated that the CQDs doping can effectively improve the photocatalytic activity of Bi2WO6. About 99.98% of RhB could be degraded with CQDs/Bi2WO6 composite under visible light irradiation for 40 min, and approximately 44.82% of E. coli can be inactivated under visible light irradiation for 6 h. Mechanism studies showed that h+ was the major active species, while e- was the minor active species. A large number of ·O2- and ·OH were produced during the photocatalytic process, which participated in the oxidation-reduction reaction to degrade organic dyes and inactivate E. coli. This work provi-ded an important reference to wastewater photocatalytic treatment towards pathogenic bacteria and organic pollutant.
赵艳艳, 范敬煜, 魏景, 施欢贤. 碳量子点/Bi2WO6复合材料高效光催化降解RhB和杀灭大肠杆菌及其催化活性增强机理研究[J]. 材料导报, 2023, 37(5): 21060126-8.
ZHAO Yanyan, FAN Jingyu, WEI Jing, SHI Huanxian. Highly Efficient Photocatalytic Degradation of RhB and Inactivation of E. coli with CQDs/Bi2WO6 Composite and Its Enhanced Visible Light Photocatalytic Activity. Materials Reports, 2023, 37(5): 21060126-8.
1 Yao X, Tang X, Wang X, et al. Materials Reports, 2021, 35(1), 01105(in Chinese). 姚希燕, 唐晓宁, 王晓楠, 等. 材料导报, 2021, 35(1), 01105. 2 Shi H, Wang C, Zhao Y, et al. Applied Catalysis B:Environmental, 2019, 254, 403. 3 Li J, Yin Y, Liu E, et al. Journal of Hazardous Materials, 2017, 321, 183. 4 Matsunaga T, Tomoda R, Nakajima T, et al. Fems Microbiology Letters, 1985, 29(1-2), 211. 5 Long Y, Wang Y, Zhang D, et al. Journal of Colloid and Interface Science, 2016, 481, 47. 6 Zhao Y, Liang X, Hu X, et al. Journal of Colloid and Interface Science, 2021, 589, 336. 7 Wang C, Shi H, Yang M, et al. Materials Research Bulletin, 2020, 124, 110730. 8 He Y, Xu L, Xia Y, et al. Chemical Industry and Engineering Progress, 2021, 40(2), 908(in Chinese). 何源, 许磊, 夏仡, 等. 化工进展, 2021, 40(2), 908. 9 Zhao C, Liao Z, Liu W, et al. Journal of Hazardous Materials, 2020, 381, 120957. 10 Rashmita D, Rajib B, Panchanan P. Materials Today Chemistry, 2018, 8, 96. 11 Ankit T, Kumud M T, Narendra S, et al. RSC Advances, 2016, 6, 72423. 12 Zhao Y, Liang X, Wang Y, et al. Journal of Colloid and Interface Science, 2018, 523, 7. 13 Sara S, Aziz H Y, Solmaz F, et al. Separation and Purification Technology, 2020, 250, 117179. 14 Li P, Zhou Z, Wang Q, et al. Journal of the American Chemical Society, 2020, 142, 12430. 15 Li S, Wang Q. Journal of Liaocheng University(Natural Science Edition), 2019, 32(3), 46(in Chinese). 李沛珅, 王强. 聊城大学学报(自然科学版), 2019, 32(3), 46.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2023, Vol. 37 
