Otocatalytic oxidative properties of BiOBr and BiOCl were significantly improved with addition of sulfite. However, the photoreduction of 4-NP on BiOI was enhanced and its photooxidation ability was inhibited in the presence of sulfite, mainly due to its less negative CB. Overall, this study provides a new understanding of sulfite-assisted BiOX photocatalysis, which is an efficient way to significantly improve photocatalyticBiO + 2H + 3e Bi + H2O E = + 0.32 V vsNHE(Weng et al, 2013)(3) BiOCl + 2H+ + 2e- Bi + H2O + Cl- E0 = + 0.16 V vsNHE(Vanysek, 2000) (4) Because the Fermi level of Bi metal ( 0.17 eV) was more positive than the CB potentials of BiOCl ( 1.1 eV) and BiOBr ( 0.5 eV), the generated photoelectrons could be trapped by OVs and then transferred to the metallic Bi, which essentially improved the separation efficiency of photoexcited electron-hole pairs (Hu et al., 2014; Huang et al., 2021). Meanwhile, the SPR effects could excite plasmonic Bi to produce excitons, and the transferred electrons kept Bi metal be in primal state (DongK. Li et al.Journal of Hazardous Materials 418 (2021)Hern dez-Gordillo, A., Romero, A.G., Tzompantzi, F., Oros-Ruiz, S., G ez, R., 2013. a o Visible light photocatalytic reduction of 4-Nitrophenol using CdS in the presence of Na2SO3. J. Photochem. https://www.buyantibody.com . A 257 (4), 449. Hern dez-Gordillo, A., Romero, A.G., Tzompantzi, F., G ez, R., 2014. Kinetic study of a o the 4-Nitrophenol photooxidation and photoreduction reactions using CdS. Appl. Catal. B 144, 50713. Hu, J., Xu, G., Wang, J., Lv, J., Zhang, X., Zheng, Z., Xie, T., Wu, Y., 2014. Photocatalytic properties of Bi/BiOCl heterojunctions synthesized using an in situ reduction method. New J. Chem. 38 (10), 4913921. Huang, Y., Long, B., Li, H., Balogun, M.-S., Rui, Z., Tong, Y., Ji, H., 2015. Enhancing the photocatalytic performance of BiOClxI1 x by introducing surface disorders and Bi nanoparticles as cocatalyst. Adv. Mater. Interfaces 2 (14), 1500249. Huang, Y., Zhu, Y., Chen, S., Xie, X., Wu, Z., Zhang, N., 2021. https://www.buyantibody.com/category/monoclonal-antibodies.html with Bi cocatalyst for taming aqueous phase N2 reduction toward enhanced solar ammonia production. Adv. Sci. 8, 2003626. Humayun, M., Qu, Y., Raziq, F., Yan, R., Li, Z., Zhang, X., Jing, L., 2016. Exceptional visible-light activities of TiO2-coupled N-doped porous perovskite LaFeO3 for 2,4dichlorophenol decomposition and CO2 conversion. Environ. Sci. Technol. 50 (24), 136003610. Jiang, J., Zhang, L., Li, H., He, W., Yin, J.J., 2013. Self-doping and surface plasmon modification induced visible light photocatalysis of BiOCl. Nanoscale 5 (21), 105730581. Jing, Q., Feng, X., Pan, J., Chen, L., Liu, Y., 2018. Facile synthesis of Bi/BiVO4 composite ellipsoids with high photocatalytic activity. Dalton Trans. 47 (8), 2602609. Kim, T.W., Choi, K.-S., 2014. Nanoporous BiVO4 photoanodes with dual-layer oxygen evolution catalysts for solar water splitting. Science 343 (6174), 99094. Lee, D.K., Lee, D., Lumley, M.A., Choi, K.-S., 2019. Progress on ternary oxide-based photoanodes for use in photoelectrochemical cells for solar water splitting. Chem. Soc. Rev. 48 (7), 2126157. Li, H., Shang, J., Ai, Z., Zhang, L., 2015. Efficient visible light nitrogen fixation with BiOBr nanosheets of oxygen vacancies on the exposed 001 facets. J. Am. Chem. https://www.buyantibody.com/category/recombinant-antibodies.html (19), 6393399. Li, H., Shang, J., Yang, Z., Shen, W., Ai, Z., Zhang, L., 2017. Oxygen vacancy associated surface Fenton chemistry: surface structure dependent hydroxyl radicals generat.