Enhanced degradation of tetracycline by gas-liquid discharge plasma coupled with g-C_(3)N_(4)/TiO_(2)  

作　　者：Zhenhai WANG Zikai ZHOU Sen WANG Zhi FANG 王振海;周子凯;王森;方志(College of Electrical Engineering and Control Science,Nanjing Tech University,Nanjing 211816,People’s Republic of China)

机构地区：[1]College of Electrical Engineering and Control Science,Nanjing Tech University,Nanjing 211816,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第9期69-78,共10页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.52277151 and 51907088);Innovative Talents Team Project of‘Six Talent Peaks’of Jiangsu Province(No.TD-JNHB-006).

摘　　要：Plasma-catalysis is considered as one of the most promising technologies for antibiotic degradation in water.In the plasma-catalytic system,one of the factors affecting the degradation effect is the performance of the photocatalyst,which is usually restricted by the rapid recombination of electrons and holes as well as narrow light absorption range.In this research,a photocatalyst g-C_(3)N_(4)/TiO_(2) was prepared and coupled with gas-liquid discharge(GLD)to degrade tetracycline(TC).The performance was examined,and the degradation pathways and mechanisms were studied.Results show that a 90%degradation rate is achieved in the GLD with g-C_(3)N_(4)/TiO_(2) over a 10 min treatment.Increasing the pulse voltage is conducive to increasing the degradation rate,whereas the addition of excessive g-C_(3)N_(4)/TiO_(2) tends to precipitate agglomerates,resulting in a poor degradation efficiency.The redox properties of the g-C_(3)N_(4)/TiO_(2) surface promote the generation of oxidizing active species(H2O2,O3)in solution.Radical quenching experiments showed that·OH,hole(h^(+)),play important roles in the TC degradation by the discharge with g-C_(3)N_(4)/TiO_(2).Two potential degradation pathways were proposed based on the intermediates.The toxicity of tetracycline was reduced by treatment in the system.Furthermore,the g-C_(3)N_(4)/TiO_(2) composites exhibited excellent recoverability and stability.

关 键 词：gas-liquid discharge PLASMA-CATALYSIS g-C_(3)N_(4)/TiO_(2) TC degradation 

分 类 号：O53[理学—等离子体物理]