title: Plasmonic Ag-pillared rectorite as catalyst for degradation of 2,4-DCP in the H2O2-containing system under visible light irradiation.
abstract: This study aims at photocatalytic degradation of 2,4-DCP with the assistance of H2O2 in aqueous solution by a composite catalyst of Ag-rectorite. The catalysts were prepared via a novel thermal decomposition method followed after the cation-exchange process. The synthesized nano-materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) surface analyzer, Ultraviolet-visible light (UV-vis) absorption spectra, field-emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM). The different mechanisms of degradation process with or without visible light irradiation were discussed, respectively. Moreover, the degradation efficiency of 2,4-DCP wastewater under Ag-rectorite/H2O2/visible light system was investigated by series of experiments, concerning on effects of major operation factors, such as H2O2 dosage and the initial pH value. The highest degradation rate was observed when adding 0.18 mL H2O2 into 50 mL 2,4-DCP solution, and the optimal pH value was 4 for the reaction. Afterwards, total organic carbon (TOC) experiments were carried out to evaluate the mineralization ratio of 2,4-DCP.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006, Guangdong, China.
authors.forename: Yunfang
authors.initials: Y
authors.lastname: Chen
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006, Guangdong, China; Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System, Guangzhou 510006, China. Electronic address: fangjzh@scnu.edu.cn.
authors.forename: Jianzhang
authors.initials: J
authors.lastname: Fang
authors.affiliation: Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China.
authors.forename: Shaoyou
authors.initials: S
authors.lastname: Lu
authors.affiliation: Institute of Engineering Technology of Guangdong Province, Key Laboratory of Water Environmental Pollution Control of Guangdong Province, Guangzhou 510440, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Institute of Engineering Technology of Guangdong Province, Key Laboratory of Water Environmental Pollution Control of Guangdong Province, Guangzhou 510440, China.
authors.forename: Dazhi
authors.initials: D
authors.lastname: Chen
authors.affiliation: Institute of Engineering Technology of Guangdong Province, Key Laboratory of Water Environmental Pollution Control of Guangdong Province, Guangzhou 510440, China.
authors.forename: Liyan
authors.initials: L
authors.lastname: Huang
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006, Guangdong, China.
authors.forename: Cong
authors.initials: C
authors.lastname: Cheng
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006, Guangdong, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Ren
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006, Guangdong, China.
authors.forename: Ximiao
authors.initials: X
authors.lastname: Zhu
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006, Guangdong, China; Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System, Guangzhou 510006, China.
authors.forename: Zhanqiang
authors.initials: Z
authors.lastname: Fang
keywords: 2,4-DCP; Ag-rectorite; H(2)O(2); Photocatalysis; Thermal decomposition