The contamination of antibiotics in aqueous environment causes increasing concerns recently.Lightassisted activation of peroxydisulfate(PDS)has been demonstrated as an efficient technology for re moval of contaminatio...The contamination of antibiotics in aqueous environment causes increasing concerns recently.Lightassisted activation of peroxydisulfate(PDS)has been demonstrated as an efficient technology for re moval of contamination in water.Herein,a hollow sphere of CuWO_(4)(h-CuWO_(4))was employed as a visible lightactivated photocatalyst for the activation of PDS,and following with high removal efficiency(98%)of antibiotic sulfamethoxazole(SMX).Under visible light irradiation,the degradation rate on hollow structures system is nearly 2 times higher than the traditional solid CuWO_(4) spheres.Furthermore,the underlying mechanism and detailed pathway of SMX degradation were proposed based on density functional theory(DFT)calculations and liquid chromatography-mass spectrometry(LC-MS).This work provides a new feasible way for advanced oxidation processes to remove antibiotics SMX in heterogeneous system,and open up new application possibilities of CuWO_(4)-based materials.展开更多
Herein,a WO3-CuWO4 nanostructured heteroj unction was prepared by a facile two-step hydrothermal method.It is composed of a WO3 square microplate and CuWO4 nanoparticles.Then,the gas sensing properties were investigat...Herein,a WO3-CuWO4 nanostructured heteroj unction was prepared by a facile two-step hydrothermal method.It is composed of a WO3 square microplate and CuWO4 nanoparticles.Then,the gas sensing properties were investigated under optimal operating temperature(120℃).The WO3-CuWO4 heterostructure shows good sensing performance towards n-butanol,with a response value up to 9.4 to towards 30 ppm n-butanol,and the response value is about 3 times higher than that of pristine Wo3.Its detection limit for n-butanol is 0.1 ppm,which indicates a potential application in lower concentration detection.Moreover,the response time of Wo3-CuWO4 nanostructured hete rojunction and the pristine WO3 are 21 s and 240 s respectively,revealing that there is a faster gas sensing process in the heterostructure.A possible sensing mechanism was then proposed on the basis of experimental data and band structure analysis.The significant enhancement of WO3-CuWO4 heterostructure could be attributed to the formation of heterojunction,which brings electronic sensitization and electron transport pathway modulation.The work offered a kind of novel and cost-effective sensing materials,and inspired more novel devices based on nanostructured heterojunction mechanism.展开更多
基金the Guangdong Basic and Applied Basic Research Foundation(No.2020B1515020038)。
文摘The contamination of antibiotics in aqueous environment causes increasing concerns recently.Lightassisted activation of peroxydisulfate(PDS)has been demonstrated as an efficient technology for re moval of contamination in water.Herein,a hollow sphere of CuWO_(4)(h-CuWO_(4))was employed as a visible lightactivated photocatalyst for the activation of PDS,and following with high removal efficiency(98%)of antibiotic sulfamethoxazole(SMX).Under visible light irradiation,the degradation rate on hollow structures system is nearly 2 times higher than the traditional solid CuWO_(4) spheres.Furthermore,the underlying mechanism and detailed pathway of SMX degradation were proposed based on density functional theory(DFT)calculations and liquid chromatography-mass spectrometry(LC-MS).This work provides a new feasible way for advanced oxidation processes to remove antibiotics SMX in heterogeneous system,and open up new application possibilities of CuWO_(4)-based materials.
基金financially support by the National Natural Science Foundation of China as general projects(Nos.21303118 and 21872102)。
文摘Herein,a WO3-CuWO4 nanostructured heteroj unction was prepared by a facile two-step hydrothermal method.It is composed of a WO3 square microplate and CuWO4 nanoparticles.Then,the gas sensing properties were investigated under optimal operating temperature(120℃).The WO3-CuWO4 heterostructure shows good sensing performance towards n-butanol,with a response value up to 9.4 to towards 30 ppm n-butanol,and the response value is about 3 times higher than that of pristine Wo3.Its detection limit for n-butanol is 0.1 ppm,which indicates a potential application in lower concentration detection.Moreover,the response time of Wo3-CuWO4 nanostructured hete rojunction and the pristine WO3 are 21 s and 240 s respectively,revealing that there is a faster gas sensing process in the heterostructure.A possible sensing mechanism was then proposed on the basis of experimental data and band structure analysis.The significant enhancement of WO3-CuWO4 heterostructure could be attributed to the formation of heterojunction,which brings electronic sensitization and electron transport pathway modulation.The work offered a kind of novel and cost-effective sensing materials,and inspired more novel devices based on nanostructured heterojunction mechanism.
