Visible light active graphene oxide modified Ag/Ag2O/BiPO4/Bi2WO6 for photocatalytic removal of organic pollutants and bacteria in wastewater
Visible light active graphene oxide modified Ag/Ag2O/BiPO4/Bi2WO6 for photocatalytic removal of organic pollutants and bacteria in wastewater
复制标题
可见光活性氧化石墨烯修饰Ag/Ag2O/BiPO4/Bi2WO6光催化去除废水中的有机污染物和细菌
DOI：
10.1016/j.chemosphere.2022.135512
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发表时间：
2022
期刊：
影响因子：
8.8
通讯作者：
Yang Yingnan
中科院分区：
文献类型：
--
作者：
Ma Qiansu;Ming Jie;Sun Xiang;Liu Na;Chen Guoping;Yang Yingnan
由于抗生素和细菌污染对陆生生物的危害和健康风险，废水问题已成为主要的环境问题。为了获得抗生素和细菌的高效去除途径，本研究采用可见光催化高级氧化技术对水体中的细菌和抗生素进行高效去除，减少水体中的细菌和抗生素的产生。制备了2D/2D GO−Ag/P/BWO异质结构光催化剂（GO：graphene oxide，Ag：Ag，Ag 2 O; P：BiPO 4; BWO：Bi 2 WO 6），用于有效净化抗生素和细菌污染废水。分别制备了GO（I）-Ag/P/BWO和GO（II）-Ag/P/BWO，并通过FT-IR、XRD、拉曼、XPS、SEM、TEM、TG、UV-VIS、PL、光电流密度、EIS等测试手段对GO（I）-Ag/P/BWO和GO（II）-Ag/P/BWO进行了表征。以罗丹明B（Rh B）和阿莫西林（AMX）为模拟有机污染物和抗生素，考察了所制备光催化剂的可见光催化活性。革兰氏阴性菌大肠埃希菌（E.大肠杆菌）为模型菌。结果表明，成功制备了GO（II）-Ag/P/BWO光催化剂，其结晶度高，产生的电子-空穴复合率低，光电流密度高。该体系能产生含能活性物种（h+、O2自由基dot-和自由基dotOH），对Rh B、AMX和E的去除表现出上级性能。大肠杆菌在可见光照射下。与已报道的GO改性Bi基光催化剂相比，GO（II）-Ag/P/BWO对Rh B、AMX和E的光催化降解性能更强。大肠杆菌中，表明其在环境废水处理中具有良好的应用前景。
Wastewater problems caused by antibiotics and bacteria contamination have become the primary environmental concern due to their harm to terrestrial organisms and health risk. To obtain the efficient removal approach of antibiotics and bacteria, visible driven advanced oxidation process by photocatalyst for the efficient removal and reducing waterborne disease was demonstrated in this study. 2D/2D GO−Ag/P/BWO heterostructure photocatalyst (GO: graphene oxide, Ag: Ag, Ag2O; P: BiPO4; BWO: Bi2WO6) were synthesized for effectively purification of antibiotics and bacteria contaminated wastewater. GO added in synthesis of BWO (1st-hydrothermal) and induced of Ag dopants (2nd-hydrothermal) of GO–Ag/P/BWO were fabricated separately and marked as GO(I)–Ag/P/BWO and GO(II)–Ag/P/BWO, characterized by different tests (FT-IR, XRD, Raman, XPS, SEM, TEM, TG, UV-VIS, PL, photocurrent density, and EIS). To testify the visible light driven photocatalytic activity of the fabricated photocatalysts, Rhodamine B (Rh B) and amoxicillin (AMX) was chosen as model emerging organic contaminants and antibiotics, respectively. While gram-negative strainEscherichia coli(E. coli) was selected as model waterborne bacteria. The results showed that GO(II)–Ag/P/BWO photocatalyst was synthesized successfully, and possessed high crystallinity, low generated electron-hole recombination rate, and high photocurrent density. The system can produce energetic active species (h+, O2radical dot−and radical dotOH), exhibiting a superior performance towards removal of Rh B, AMX andE. coliunder visible light irradiation. Comparing to other reported GO modified Bi based photocatalyst, GO(II)–Ag/P/BWO had stronger photocatalytic performance in degradation of Rh B, AMX andE. coli, which indicated its high prospects for practical application in environmental wastewater treatment.