Morphology modulation and performance optimization of nanopetal-based Ag-modified Bi2O2CO3 as an inactivating photocatalytic material

被引：23

作者：

Wang, Fengguang ^{[1
]}

Zhou, Feng ^{[1
]}

Zhan, Su ^{[1
]}

He, Qiuchen ^{[1
]}

Song, Yupeng ^{[1
]}

Zhang, Chenglin ^{[1
]}

Lai, Jianfu ^{[1
]}

机构：

[1] Dalian Maritime Univ, Key Lab Ship Machinery Maintenance & Manufacture, Minist Transport, Dalian 116026, Peoples R China

来源：

ENVIRONMENTAL RESEARCH | 2021年 / 198卷

基金：

中国国家自然科学基金;

关键词：

Photocatalytic; Inactivate marine microorganisms; Surface plasmon resonance Effect (SPR); Ag; VISIBLE-LIGHT; FABRICATION; MICROSPHERES;

D O I：

10.1016/j.envres.2021.111256

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The use of photocatalytic technology to kill bacteria on marine vessel surface coatings has been paid more attention by research scholars. In this paper, petal-like microspheres with Ag nanoparticles were prepared by a simple one-step process combining the hydrothermal method and photodeposition. The 0.7% Ag/Bi2O2CO3 composite photocatalyst exhibited the highest photocatalytic efficiency for bacterial removal under visible light irradiation and had the highest photogenerated carrier separation efficiency, and the sterilization rate was doubled compared with that of pure Bi2O2CO3, reaching 95%. Using X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy, the existence of Ag nanoparticles was confirmed, and their size was approximately 10 nm. The surface plasmon resonance (SPR) effect of Ag nanoparticles was investigated by ultraviolet-visible diffuse reflectance spectroscopy (DRS). It was shown that the surface plasmon resonance effect of Ag improved the spectral utilization of the Ag/Bi2O2CO3 composite photocatalyst and enhanced the stability of the catalyst. This caused the Ag/Bi2O2CO3 composite photocatalyst to have superior photocatalytic activity to pure Bi2O2CO3. The results of electrochemical impedance characterization and transient photocurrent response show that 0.7% Ag/Bi2O2CO3 has a high efficiency of photogenerated carrier separation. By the free radical capture test, hydroxyl radicals were the primary active substance, and Ag+ improved the photocatalytic sterilization activity.

引用

页数：9

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