Both the surface hydroxyl groups and oxygen vacancies play important roles in molecular oxygen activation,and their synergistic regulation of molecular oxygen activation provides an advantageous pathway for achieving the selective degradation of pollutants.In this study,the surface hydroxyl groups and oxygen vacancies of BiOClxI1-x were adjusted by tuning the ratio of I/Cl.The structures,morphologies,surface components and the produced active oxygen species in BiOClxI1-x system were characterized by XRD,SEM,TEM,FT-IR,XPS and ESR.The selective degradation mechanisms of PCPNa and BPA were systematically studied via trapping the active oxygen species during the degradation process.It was found that ·OH and 1O2 were mainly responsible for PCPNa degradation,while e- and 1O2 played the key roles for BPA degradation.We proposed the synergistic regulation of molecular oxygen activation by the surface hydroxyl groups and oxygen vacancies for selective degradation of PCPNa and the direct degradation of BPA.This study provides a novel way for selective degradation of benzene compounds via molecular oxygen activation.
[1] 熊楠,姚小珊,周秀花,等.环境中五氯酚对水生生物的毒理学研究进展[J].武汉工程大学学报,2018,40(2):119-126.
[2] 邓红梅,梁春营,陈永亨.水环境中双酚A的污染及其生态毒理效应[J].环境污染与防治,2009,31(7):70-76.
[3] 周启星,罗义,王美娥.抗生素的环境残留、生态毒性及抗性基因污染[J].生态毒理学报,2007(3):243-251.
[4] Xu L,Guo Z,Zhang X,et al.Effective solar light-driven isothiazolinone degradation by morphology and oxygen vacancy-modified Gd-doped BiOCl[J].New Journal of Chemistry,2024,48(14):6168-6179.
[5] Zhao S,Wen Y,Liu X,et al.Formation of active oxygen species on single-atom Pt catalyst and promoted catalytic oxidation of toluene[J].Nano Research,2020,13(6):1544-1551.
[6] Zhang Z Q,Duan P J,Bai C W,et al.Surface-hydroxylated single-atom catalyst with an isolated Co-O-Zn configuration achieves high selectivity in regulating active species[J].Nature Communications,2025,16(1):2376.
[7] Yu B,Cheng L,Wu J,et al.Surface hydroxyl group dominating aerobic oxidation of met-hane below room temperature[J].Energy & Environmental Science,2024,17(21):8127-8139.
[8] Wang S,Chen Z,Sun L,et al.Synergistic mechanism of disparate surface hydroxyls and oxygen vacancies towards peroxymonosulfate activation for durable water decontamination[J].Chemical Engineering Journal,2025,503:158259.
[9] Zhang H,Wang X,Lin Y,et al.Highly-efficient peroxymonosulfate activation by porous nano-MgO for tetracycline degradation:surface hydroxyl groups and oxygen vacancies synergetic mediated nonradical process[J].Process Safety and Environmental Protection,2024,190:560-573.
[10] Yang Z,Shi Y,Zhang X,et al.Surface hydroxyl manipulation of BiOCl nanosheets for promoted O2 activation and photocatalytic NO removal[J].Sustainability Science and Technology,2024,1(1):014003.
[11] Li Q,Ren J,Hao Y,et al.Insight into reactive species-dependent photocatalytic toluene mineralization and deactivation pathways via modifying hydroxyl groups and oxygen vacancies on BiOCl[J].Applied Catalysis B:Environmental,2022,317:121761.
[12] Li D,Li L,Zhao M,et al.Exploring the activation pathway of photo-induced electrons in facets-dependent I- doped BiOCl nanosheets for PCPNa degradation[J].Nanotechnology,2021,32(49):495707.
[13] Wu L,Jiang G,Wang X,et al.Amorphous iron oxides anchored on BiOCl nanoplates as robust catalysts for high-performance photo-Fenton oxidation[J].Journal of Colloid and Interface Science,2022,622:62-74.
[14] Gao X,Peng W,Tang G,et al.Highly efficient and visible-light-driven BiOCl for photo-catalytic degradation of carbamazepine[J].Journal of Alloys and Compounds,2018,757:455-465.
[15] Song Y,Meng X,Bi M,et al.Effect of hydroxyl groups on the oxygen vacancy and hydr-ogen-sensitive properties of CeO2 in different morphologies[J].International Journal of Hydrogen Energy,2022,47(60):25443-25453.
[16] Wang C Y,Zhang X,Qiu H B,et al.Bi24O31Br10 nanosheets with controllable thickness for visible-light-driven catalytic degradation of tetracycline hydrochloride[J].Applied Catalysis B:Environmental,2017,205:615-623.
[17] Wang S,Guan Y,Wang L,et al.Fabrication of a novel bifunctional material of BiOI/Ag3-VO4 with high adsorption-photocatalysis for efficient treatment of dye wastewater[J].Applied Catalysis B:Environmental,2015,168:448-457.
[18] Yang J,Su H,Wu Y,et al.Facile synthesis of kermesinus BiOI with oxygen vacancy for efficient hydrogen generation[J].Chemical Engineering Journal,2021,420:127607.
[19] Li X,Kang B,Dong F,et al.Enhanced photocatalytic degradation and H2/H2O2 production performance of S-pCN/WO2.72 S-scheme heterojunction with appropriate surface oxygen vacancies[J].Nano Energy,2021,81:105671.
[20] Li D,Pan C,Zong Y,et al.Ru(Ⅲ)-periodate for high performance and selective degradation of aqueous organic pollutants:important role of Ru(Ⅴ) and Ru(Ⅳ)[J].Environmental Science & Technology,2023,57(32):12094-12104.
[21] Wang P,Wang L,Xiao R,et al.Unveiling the mystery of chlorine radical in water by a simple methanol-based spin trapping[J].Water Research,2025:124100.
[22] Dung N T,Thao V D,Thao N P,et al.Turning peroxymonosulfate activation into singlet oxygen-dominated pathway for ofloxacin degradation by co-doping N and S into durian peel-derived biochar[J].Chemical Engineering Journal,2024,483:149099.
PDF
