多重改性制备具有增强光催化性能的Bi_(2)O_(3)/ZrO_(2)复合半导体  

Preparation of Bi_(2)O_(3)/ZrO_(2) Composite Semiconductor with Enhanced Photocatalytic Performance through Multiple Modifications

作　　者：王秋芹 葛金龙[1] 韩林松 陈付良 黄晓晨 WANGg Qiu-qin;GE Jin-long;HAN Lin-song;CHEN Fu-liang;HUANG Xiao-chen(Anhui Provincial Engineering Laboratory of Silicon-based Materials,Bengbu University,Bengbu,233030,Anhui)

机构地区：[1]蚌埠学院安徽省硅基新材料工程实验室,安徽蚌埠233030

出　　处：《蚌埠学院学报》2021年第5期24-28,共5页Journal of Bengbu University

基　　金：安徽省重点研究与开发计划项目(202004a05020017);蚌埠学院材料科学与工程重点学科项目(2017ZDXK03);蚌埠学院自然科学研究项目(2017ZR16)。

摘　　要：以硝酸铋和硝酸锆为原料,采取溶液燃烧合成法快速批量化制备Bi_(2)O_(3)/ZrO_(2)粉体。通过不同热处理温度和掺杂,调控样品的结晶性、粒径尺寸、比表面积和带隙。利用X射线衍射仪(XRD)、激光粒度分布仪、紫外可见吸收光谱等手段对样品进行表征分析。实验结果表明,600℃下制备的Bi_(2)O_(3)/ZrO_(2)粉体具有最优的结晶性和表面积,光催化实验表明其具有最优的光催化性能,紫外光照射4 h后光催化效率可以达到70.3%。通过金属离子掺杂改性,Fe^(3+)掺杂1%时紫外光照射4 h后光催化效率提高至75.3%,Fe^(3+)掺杂引入掺杂能级,既能够拓宽对光谱的响应范围,又能减少光生电子——空穴的复合。Ce^(4+)掺杂2%时紫外光照射4 h最大降解率为85.7%,掺杂后促进氧空穴的形成及体相氧循环,提高催化剂的光催化活性。Bi_(2)O_(3)/ZrO_(2) powder were prepared by solution combustion method with bismuth nitrate and zirconium nitrate as raw materials.The crystallinity,particle size,specific surface area and band gap of the samples were controlled by different heat treatment temperature and doping.The samples were characterized by X-ray diffraction(XRD),laser particle size distribution and UV-Vis absorption spectrum.The results showed that the Bi_(2)O_(3)/ZrO_(2) powder prepared at 600℃has the best crystallinity and surface area.The photocatalytic experiment shows that the Bi_(2)O_(3)/ZrO_(2) powder has the best photocatalytic performance,and the photocatalytic efficiency can reach 70.3%after 4 h of UV irradiation.By doping metal ions,the photocatalytic efficiency increased to 75.3%after UV irradiation for 4 h with 1%Fe^(3+).The doping level of Fe^(3+)can not only broaden the response range to the spectrum,but also reduce the recombination of photogenerated electron hole.When Ce^(4+) was doped with 2%,the maximum degradation rate was 85.7%under UV irradiation for 4 h.The doping promoted the formation of oxygen holes and the bulk oxygen cycle,and improved the photocatalytic activity of the catalyst.

关 键 词：Bi_(2)O_(3)/ZrO_(2)粉体 溶液燃烧法 离子掺杂 光催化 

分 类 号：O643[理学—物理化学] X703[理学—化学]