BiVO4/WO3-x. S型异质结通过增强内建电场提升光热催化活性

打开文本图片集

Abstract：Modulating the internal electric field （IEF） remains acritical challenge for S-scheme heterojunction photocatalysts. The BiVO4ΛNO3-x S-scheme heterojunctions were successfullyprepared to purify the wastewater environment where tetracycline （TC）and Cr（VI） coexist under visible light ilumination.The BiVO4NO3-x with 0% （wt） WO3-x （2号 （BVOMO3-x-0） demonstrated superior photocatalytic efficiency，which coulddegrade 78.5% TCand reduce 85.3% Cr（V|） in 60min .The photocatalyticactivity BV0NV03-x-0 displayedenhancedremoval efficiencyin themixed system.The removal ability TCand Cr（V|） was increased by .29and .32 times，respectively.Based on infrared thermography （IR） thermographymeasurements， theelevated reaction system temperatures were ascribed to the photothermal effect WO3-x Oxygen vacancies （OVs） could amplify the energy band difference between WO3-x and BiVO4 ，which strengthens the IEF and accelerates the separation carriers.Adetailed degradationpathway and intermediate toxicity were caried out using the mung bean experiment and the results the Liquid Chromatograph Mass Spectrometer （LC-MS）. Ingeneral，this work provided new insights for regulating IEF to enhance thedegradationeficiencyinmixed wastewaterand thecarriersseparation intheS-scheme heterojunction the photothermal-catalyticsystem.

Key Words：S-scheme heterojunction;Internal electric field;Photothermal efect;Tetracycline；Cr（Vl）

中图分类号：0643

1 引言

环境废水中通常含有有害污染物，包括重金属和抗生素，如六价铬 （Cr（VI）） 和四环素（TC），这些污染物对人类健康和水生生态系统都有不利影响[-5]。（剩余21405字）