Ag/g-C3N4复合材料可见光降解磺胺甲基嘧啶的效能及机理研究
Degradation effect and mechanism of sulfamerazine by Ag/g-C3N4 under visible light irradiation
-
摘要: 以g-C3N4为光催化材料，聚乙烯吡咯烷酮为抑制剂，采用光还原法合成了Ag/g-C3N4复合材料，考查其在可见光条件下降解磺胺甲基嘧啶的效能和机理.结果表明：在可见光照射下，Ag/g-C3N4复合材料对磺胺甲基嘧啶具有良好的降解效果，照射30 min后，磺胺甲基嘧啶的降解效率达97.3%；光生空穴和·O2-是降解磺胺甲基嘧啶的主要活性物质，在二者的作用下，磺胺甲基嘧啶的降解途径主要有S-N键断裂、苯环的羟基化、-NH2的硝基化、-CH3甲基的羧基化等.Abstract: Ag/g-C3N4 was synthesized by a photo-reduction method in the presence of g-C3N4 as the photocatacytic material and polyvinylpyrrolidone as an inhibitor. The degradation effect and mechanism of sulfamerazine by Ag/g-C3N4 was studied in the presence of visible lightir irradiation. The results indicated that sulfamerazine could be effectively degraded by Ag/g-C3N4. The degradation rate of sulfamerazine was 97. 3% after being irradiated for 30 min. Photogenerated hole and ·O2- were the main active species, which could regrade sulfamerazine by the cleavage of S-N bond, the hydroxylation of the benzene ring, the nitration of amino and the carboxylation of methyl.
-
Key words:
- Ag/g-C3N4 /
- visible light irradiation /
- sulfamerazine /
- mechanism of degradation
-
-
[1]
GBYLIK-SIKORSKA M, POSYNIAK A, SNIEGOCKI T, et al. Liquid chromatographytandem mass spectrometry multiclass method for the determination of antibiotics residues in water samples from water supply systems in food-producing animal farms[J]. Chemosphere,2015, 119:8.
-
[2]
BARAN W, ADAMEK E, ZIEMIA ŃSKA J, et al. Effects of the presence of sulfonamides in the environment and their influence on human health[J]. Journal of Hazardous Materials, 2011,196(30):1.
-
[3]
SUN Q,LI M Y,MA C,et al. Seasonal and spatial variations of PPCP occurrence, removal and mass loading in three wastewater treatment plants located in different urbanization areas in Xiamen, China[J]. Environmental Pollution, 2016,208:371.
-
[4]
LIN A Y,YU T,LATEEF S K. Removal of pharmaceuticals in secondary wastewater treatment processes in Taiwan[J]. Journal of Hazardous Materials, 2009,167(1/2/3):1163.
-
[5]
BU Q W,WANG B,HUANG J,et al. Pharmaceuticals and personal care products in the aquatic environment in China:a review[J]. Journal of Hazardous Materials,2013,262(15):189.
-
[6]
LI S,SHI W Z,LIU W,et al. A duodecennial national synthesis of antibiotics in China's major rivers and seas (2005-2016)[J]. Science of the Total Environment,2018,615(15):906.
-
[7]
SONG Y L, GAO S S, TIAN J Y, et al. Construction of Ag/TiO2 composites with uniformsized Ag nanoparticles and the application for sulfisoxazole degradation in the presence of visible radiation[J]. Journal of Environmental Chemical Engineering,2020,8(5):104390.
-
[8]
宋亚丽. TiO2基可见光催化剂降解水中典型磺胺类抗生素的研究[D]. 哈尔滨:哈尔滨工业大学,2018.
-
[9]
康蓓蓓,冉全,潘丽丽,等. 紫外光活化过硫酸盐降解磺胺甲嘧啶[J]. 山东化工,2018,47(2):27.
-
[10]
张嘉凝,何静,蔡言安,等. 不同混凝剂对四环素及磺胺甲基嘧啶的吸附性能[J]. 青岛理工大学学报,2020,41(4):64.
-
[11]
SONG Y L,HUANG L,ZHANG X J,et al. Synergistic effect of persulfate and TiO2 under simulated solar light irradiation:Implication for the degradation of sulfamethoxazole[J]. Journal of Hazardous Materials,2020,393(5):122379.
-
[12]
宋亚丽,张肖静,朱艺博,等. Ag/TiO2可见光催化技术降解水中磺胺嘧啶的研究[J]. 轻工学报,2019,34(6):72.
-
[13]
SONG Y L,TIAN J Y,GAO S S,et al. Photodegradation of sulfonamides by TiO2 under visible light irradiation:effectiveness, mechanism and pathways[J]. Applied Catalysis B:Environmental,2017,210:86.
-
[14]
DEHGHAN S, JAFARI A J, FARZADKIA M, et al. Visible-light-driven photocatalytic degradation of metalaxyl by reduced graphene oxide/Fe3O4/ZnO ternary nanohybrid:influential factors, mechanism and toxicity bioassay[J]. Journal of Photochemistry and Photobiology A:Chemistry,2019,375(15):280.
-
[15]
EGHBALI P, HASSANI A, SÜNDÜ B, et al. Strontium titanate nanocubes assembled on mesoporous graphitic carbon nitride (SrTiO3/mpTiO2):preparation, characterization and catalytic performance[J]. Journal of Molecular Liquids, 2019, 290(15):111208.
-
[16]
WANG J,YANG Z,GAO X X,et al. Core-shell TiO2@ZnO composites as photoanodes with double synergistic effects for enhanced visiblelight photoelectrocatalytic activities[J]. Applied Catalysis B:Environmental,2017,217:169.
-
[17]
ZHANG Y W, LIU J H, WU G, et al. Porous graphitic carbon nitride synthesized via direct polymerization of urea for efficient sunlight-driven photocatalytic hydrogen production[J]. Nanoscale,2012,4(17):5300.
-
[18]
YANG Y X,GUO Y N,LIU F Y,et al. Preparation and enhanced visible-light photocatalytic activity of silver deposited graphitic carbon nitride plasmonic photocatalyst[J]. Applied Catalysis B:Environmental, 2013, 142/143:828.
-
[19]
SHAN G Y,HAO H W,WANG X M,et al. The effect of PVP on the formation and optical properties ZnO/Ag nanocomposites[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects,2012,405(5):1.
-
[20]
WANG Q,WANG W,ZHONG L L,et al. Oxygen vacancy-rich 2D/2D BiOCl-TiO2 ultrathin heterostructure nanosheets for enhanced visible-light-driven photocatalytic activity in environmental remediation[J]. Applied Catalysis B:Environmental,2018,220:290.
-
[21]
PALIWAL M K,MEHER S K. 3D-heterostructured NiO nanofibers/ultrathin TiO2 holey nanosheets:an advanced electrode material for all-solid-state asymmetric supercapacitors with multi-fold enhanced energy density[J]. Electrochimica Acta,2020,358:136871.
-
[22]
HE Q C, ZHOU F, ZHAN S, et al. Enhancement of photocatalytic and photoelectrocatalytic activity of Ag modified mpTiO2 composites[J]. Applied Surface Science,2017,391:423.
-
[23]
LIU N Y, HAN M M, SUN Y, et al. ATiO2 based photoelectrochemical cell using O2/H2O redox couples[J]. Energy & Environmental Science,2018,11(7):1841.
-
[24]
HOU W B, CRONIN S B. A review of surface plasmon resonance-enhanced photocatalysis[J]. Advanced Functional Materials, 2013,23(13):1612.
-
[25]
SONG Y L,QI J Y,TIAN J Y,et al. Construction of Ag/TiO2 photocatalysts with visiblelight photocatalytic activity for sulfamethoxazole degradation[J]. Chemical Engineering Journal, 2018,341(1):547.
-
[1]
-
点击查看大图
计量
- PDF下载量: 19
- 文章访问数: 1354
- 引证文献数: 0
下载:
