以Bi(NO3)35H2O为铋源,SnCl45H2O为锡源和部分氯源,乙二醇为溶剂,尿素为沉淀剂,利用溶剂热法原位合成了不同尺寸的Sn4+掺杂BiOCl(简称Sn4+/BiOCl)。对罗丹明B的降解结果表明,当Sn掺杂量为8%,水热温度为110℃,水热时间为3h时制备的BiOCl光催化性能最好。可见光照3h后罗丹明B完全降解。X射线衍射和扫描电镜表征结果显示Sn的掺杂使BiOCl的晶化温度显著降低,Sn4+/BiOCl为片层结构排列较为紧密规整的花状微球,粒径约1～2.5μm。紫外-可见光谱表明掺杂Sn4+明显增强了BiOCl对可见光的光响应性能。
Using Bi(NO3)35H2O as the source of bismuth,SnCl45H2O as the source of stannum and chlorine,glycol as the solvent and urea as the additive,the Sn4+-doped BiOCl photocatalysts with different sizes were prepared by sol-thermal method.Using Rhodamine B as the degradant,the results showed that the photocatalytic performance of Sn4+/BiOCl was best when the doping amount was 8%,the hydrothermal temperature was 110℃,and the hydrothermal time was 3 h.After irradiated for 3 h under visible light,Rhodamine B was completely degraded.The XRD and SEM characterization results showed that Sn doping significantly reduced the crystallization temperature of BiOCl and the microspheres presented flower-like microspheres with compact and regular lamellar structure,which particle size was about 1～2.5μm.The UV-Vis spectra showed that doping Sn4+ significantly enhanced optical response of BiOCl to visible light.
[1] Fujishima A,Honda K.Electrochemical photolysis of water at a semiconductor electrode[J].Nature,1972,238:37-38.
[2] Serpone A N,Emeline V.Semiconductor photocatalysis-past,present,and future outlook[J].The Journal of Physical Chemistry Letters,2012,3(5):673-677.
[3] Prashant V,Kamat Song J.Semiconductor photocatalysis:“tell us the complete story!”[J].ACS Energy Letters,2018,3(3):622-623.
[4] Tang J,Zou Z,Ye J.Efficient photocatalytic decomposition of organic contaminants over CaBi2O4 under visiblelight irradiatio[J].Angewandte Chemie International Edition,2004,43(34):4463-4466.
[5] Zhang L,Wang H,Chen Z,et al.Bi2WO6 micro/nanostructures:synthesis,modifications and visible light-driven photocatalytic applications[J].Applied Catalysis B:Environmental,2011,106:1-13.
[6] Ye L Q,Su Y R,Jin X L,et al.Recent advances in BiOX(X=Cl,Br and I) photocatalysts:synthesis,modification,facet effects and mechanisms[J].Environmental Science-Nano,2014,1:90-112.
[7] 李晓芳,郭宇煜,张煜星,等.Tb掺杂BiOCl光催化剂的制备及其光催化性能研究[J].化工新型材料,2019,47(8):143-147.
[8] He Z Q,Shi,Y Q,Gao C,et al.BiOCl/BiVO4 p-n heterojunction with enhanced photocataly-tic activity under visible-light irradiation[J].The Journal of Physical Chemistry C,2014,118(1):389-398.
[9] Du M,Zhang S Y,Xing Z P,et al.All-solid Z-scheme Bi-BiOCl/AgCl heterojunction microspheres for improved electron-hole separation and enhanced visible light-driven photo-catalytic performance[J].Langmuir,2019,35(24):7887-7895.
[10] Ning S,Ding L,Lin Z,et al.One-pot fabrication of Bi3O4Cl /BiOCl plate-on-plate heterojunction with enhanced visible-light photocatalytic activity[J].Applied Catalysis B:Environmental,2016,185:203-212.
[11] Chakraborty A K,Rawal S B,Han S Y,et al.Enhancement of visiblelight photocatalytic efficiency of BiOCl/ Bi2O3 by surface modification with WO3[J].Applied Catalysis A:General,2011,407(1/2):217-223.
[12] 单文杰,张莹.铋系复合光催化剂的制备及其对双酚A光催化降解研究[J].化工新型材料,2019,47(4):200-203.
