摘要
采用简单的溶剂热反应获得片状CdS纳米材料,然后将其与不同量的富勒烯羧酸衍生物(C60C(COOH)2)进一步复合,从而制备了一系列C60C(COOH)2的质量分数范围为0.25%~1.25%的二元复合材料CdS/C60C(COOH)2。在对该复合材料进行表征之后,研究了其对可见光下罗丹明B(RhB)的催化降解效果,结果表明有利于光生电子和空穴分离的C60C(COOH)2可以有效提高单一半导体CdS纳米材料的吸附性和光催化活性,改善了可见光下RhB的降解速率。实验还表明,当C60C(COOH)2负载量为0.50%时,其光催化降解RhB的效率最高,并且采用CdS/C60C(COOH)2作为催化剂时,经过4次循环使用后,在可见光下对RhB的降解率仍可维持在80%以上,表明该复合材料能够有效改善自身光腐蚀现象。最后初步探讨了光催化反应的机理。
The CdS nanosheet was prepared by simple solvothermal method firstly,and a series of CdS/C60C(COOH)2 composites over the mass fraction range of 0.25% to 1.25% were fabricated by C60C(COOH)2combining with the flaky CdS nanomaterial.After being characterized by different techniques in detail,the CdS/C60C(COOH)2 composites were used as the catalysts for degradation of Rhodamine B(RhB)under visible light.Experiments results revealed that CdS/C60C(COOH)2 composites possessed higher absorption ability and photocatalytic activity due to efficient separation of photogenerated electron-hole pairs of C60 derivatives than sole CdS nanosheets.It was also found that CdS/C60C(COOH)2 nanocomposite with C60C(COOH)2(0.50%)exhibited the highest photocatalytic degradation efficiency of RhB.Moreover,after four cycles,the efficiency of this composite as a catalyst for RhB degradation was also above 80%,which indicated that the composites were relative stable and could avoid the self-photocorrosion.At last,the response mechanism was studied briefly.
作者
吴芳辉
李晓柠
赵自豪
程源晟
王淼
储心萍
WU Fang-hui;LI Xiao-ning;ZHAO Zi-hao;CHENG Yuan-sheng;WANG Miao;CHU Xin-ping(School of Chemistry and Chemical Engineering,Anhui University of Technology,Ma’anshan 243002)
出处
《分析科学学报》
CAS
CSCD
北大核心
2019年第1期19-24,共6页
Journal of Analytical Science
基金
国家自然科学基金(No.21271006)
安徽省自然科学基金(No.1808085MB36)
安徽省教育厅自然科学重点基金(No.KJ2015A024)
安徽省大学生创新创业训练计划(No.201710360194)