摘要
以硫化钠和乙酸镉为原料,通过水热合成法制备十六烷基三甲基溴化铵(CTMAB)改性CdS催化剂。利用XRD、FTIR、FESEM(EDS)和UV-Vis DRS等手段对催化剂进行表征,并在可见光下对甲基橙(MO)进行降解实验。结果表明,经CTMAB改性处理后,CdS的晶体结构未发生破坏但结晶度有所提高,其形貌由原来片层状结构转变为颗粒状,表面也被有机化改性。改性CdS的禁带宽度稍有增大,但吸附和光催化性能有较大提升,0.3CdS表现出最好的光催化活性,对MO的降解速率约为CdS的14倍,光照100 min,降解率接近100%。自由基捕获和循环实验表明,h^(+)、·OH和·O^(-)_(2)均大量存在反应体系中,在经过4个循环的光催化反应后,0.3CdS的催化活性下降约43%。
The CdS catalysts modified with hexadecyltrimethylammonium bromide(CTMAB)were prepared by sodium sulfide and cadmium acetate as raw materials through hydrothermal synthesis method.The catalysts were characterized by XRD,FTIR,FESEM(EDS),UV-Vis DRS and methyl orange(MO)was degraded under visible light.The results showed that crystal structure of CdS after CTMAB modification was not destroyed,but the crystallinity was improved.Meanwhile,morphology of CdS was changed from lamellar structure to granular structure,and the surface was also organically modified.The band gap of modified CdS was slightly increased,but the adsorption and photocatalytic performance was greatly improved.The 0.3CdS catalyst showed the best photocatalytic activity,and the degradation rate of MO was about 14 times that of CdS,and the degradation rate was close to 100%under 100 min of visible light.Radical-Trapping and cycling experiments showed that h^(+),·OH and·O^(-)_(2) were abundant in the reaction system,and the catalytic activity of 0.3CdS decreased by about 43%after four cycles of photocatalytic reaction.
作者
缪绪建
宋瑞雪
毛爱荣
时文澳
蒋仲豪
刘海燕
王爱民
白妮
MIAO Xujian;SONG Ruixue;MAO Airong;SHI Wenao;JIANG Zhonghao;LIU Haiyan;WANG Aimin;BAI Ni(School of Chemistry and Chemical Engineering,Yulin University,Yulin 719000,China;Xi′an Research Institute of Chinese Lacquer,Xi′an 712000,China;Shenmu Dongfeng Metal Magnesium Co.Ltd.,Shenmu 719000,China)
出处
《化工科技》
CAS
2024年第1期50-55,共6页
Science & Technology in Chemical Industry
基金
陕西省科技创新团队计划项目(2023-CX-TD-39)
中国科学院洁净能源创新研究院-榆林学院联合基金项目(2021004)。
关键词
十六烷基三甲基溴化铵改性
CDS
光催化剂
可见光催化降解
甲基橙
Hexadecyltrimethylammonium bromide modification
CdS
Photocatalyst
Visible light catalytic degradation
Methyl orange
