摘要
水热法制备了以聚乙二醇(PEG-200)为模板剂的稀土元素Eu复合Bi VO4光催化剂,并对材料进行XRD、SEM、UV-vis DRS、BET的表征和分析。以光催化降解甲基蓝(MB)效率作为光催化活性的指标,考察Eu复合对Bi VO4光催化活性的影响。结果表明:Eu复合可使Bi VO4的晶型发生转变,同时又抑制四方相晶体生长,使晶粒尺寸变小,比表面积增大。复合样品中,部分Eu3+进入Bi VO4晶格内取代Bi3+,使晶形发生畸变,有利于光催化活性的提高。当Eu的复合量为50%时,光催化降解甲基蓝的效率最高,可见光照射120min降解效率可达到90%,较纯Bi VO4的光降解效率明显提高。
Eu-doped Bi VO4 photocatalysts were synthesized by hydrothermal method using PEG-200 as the template. The material were characterized by XRD,SEM,UV-vis DRS and BET. The photocatalytic degradation rate of methyl blue was used to investigate the influence of the dopants for the photocatalytic activity of Bi VO4. The results revealed that the dopants had a significant effect on the transition of crystal phase,prevention of the crystal growth and the increase of BET. Some Bi3＋ in the Bi VO4 crystal lattice were substituted by Eu3＋ leading to a crystal distortion,which was beneficial for the enhancement of photocatalytic activity. For 50% Eu-doped Bi VO4 nanosheets,it performed with the best photocatalytic activity. The photodegradation rate of MB was 90% after 120 min visible light irradiation,which was much higher than that of pure Bi VO4.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2016年第4期1121-1125,共5页
Chemical Industry and Engineering Progress
基金
国家自然科学基金(51378217)
广东省自然科学基金(2014B050505004)
广东省科技计划(2015B020215004)项目
关键词
水热
制备
催化剂
降解
hydrothermal
preparation
catalyst
degradation
