Solar-driven efficient degradation of emerging contaminants by g-C3N4-shielding polyester fiber/TiO2 composites

被引：71

作者：

Chen, Yi ^{[1
]}

Lu, Wangyang ^{[1
]}

Shen, Haibin ^{[1
]}

Gu, Yan ^{[1
]}

Xu, Tiefeng ^{[1
]}

Zhu, Zhexin ^{[1
]}

Wang, Gangqiang ^{[1
]}

Chen, Wenxing ^{[1
]}

机构：

[1] Zhejiang Sci Tech Univ, Natl Engn Lab Text Fiber Mat & Proc Technol Zheji, Hangzhou 310018, Zhejiang, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2019年 / 258卷

基金：

中国国家自然科学基金;

关键词：

g-C3N4-shielding PET; TiO2; Photocatalytic degradation; Emerging contaminants; Solar irradiation; GRAPHITIC CARBON NITRIDE; IN-SITU SYNTHESIS; AQUEOUS SEMICONDUCTOR SUSPENSIONS; VISIBLE-LIGHT; GRAPHENE OXIDE; PHOTOCATALYZED DEGRADATION; MECHANICAL-PROPERTIES; ASSISTED SYNTHESIS; WATER; OXIDATION;

D O I：

10.1016/j.apcatb.2019.117960

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Solar-driven photocatalysis has shown tremendous potential for environmental remediation, but photocatalysts with the strong oxidation ability usually destroy some organic carriers. Herein, we constructed a graphitic carbon nitride (g-C3N4)-shielding polyester fiber (PET)/titanium dioxide (TiO2) composite (g-C3N4-TiO2@LMPET) by using g-C3N4 as an isolation layer to protect the PET from the oxidation damage by hydroxyl radicals ((OH)-O-center dot). The results of photoluminescence and photocurrent indicated that the g-C3N4-TiO2@LMPET has lower photogenerated charge recombination rate. Meanwhile, g-C3N4 broadens the absorption range of the composite to visible region. Therefore, the g-C3N4-TiO2@LMPET composite exhibited a significantly enhanced photo catalytic performance toward the degradation of sulfaquinoxaline (SQX) and thiamethoxam under solar irradiation. Moreover, the g-C3N4-TiO2@LMPET exhibited good repeatability in cyclic experiments. Finally, the possible degradation pathways and mechanisms of SQX and thiamethoxam were proposed. Overall, our work provides a feasible method for constructing efficient and stable photocatalytic materials to eliminating emerging contaminants.

引用

页数：12

共 82 条

[41] Graphitic Carbon Nitride (g-C3N4)-Based Photocatalysts for Artificial Photosynthesis and Environmental Remediation: Are We a Step Closer To Achieving Sustainability? [J].