镧掺杂SnO2光催化材料及其性能研究
景德镇陶瓷大学, 材料科学与工程学院, 江西景德镇 333403
| 摘 要： | 二氧化锡（SnO2）是一种n型半导体材料，在光催化方面具有潜在的应用前景，通过适当的掺杂处理，可改变二氧化锡的带隙宽度和电子结构，进一步提高其光催化性能；以五水四氯化锡、十二胺、油酸、氧化镧为原料，采用溶剂热法合成不同镧掺杂量的二氧化锡纳米粉体，利用XRD、SEM、EDS等对样品进行表征，探究了不同氧化镧掺杂量对二氧化锡粉体形貌、结构的影响，且以罗丹明B溶液为模拟污染物研究了不同镧掺杂量、不同罗丹明B初始浓度、不同光催化剂投加量对二氧化锡粉体的光催化性能的影响。结果表明：镧成功地掺入SnO2中，合成的镧掺杂SnO2过程中并无其他杂质引入，都为单一四方晶相；镧掺杂改变了SnO2的电子结构，导致其带隙宽度发生了变化，5%的镧掺杂下SnO2带隙宽度减小到3.2 ev；氧化镧的掺杂对二氧化锡的光催化性能有促进作用，掺杂量为5%时，对罗丹明B的降解率达到最高，即镧掺杂量5%样品投加80mg至100ml的10mg/L罗丹明B中，2h降解率达到100%. |
| 关 键 词： | 镧掺杂; SnO2纳米粉体; 光催化 |
| DOI： | 10.57237/j.wjese.2024.02.003 |
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收稿日期: 2024-04-29
接受日期: 2024-05-21
在线出版日期: 2024-05-27
The Study of Lanthanum-Doped SnO2 Photocatalytic Materials and Their Properties
School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen 333403, China
| Abstract: | Tin dioxide (SnO2) is an N-type semiconductor material, which has a potential application prospect in photocatalysis. The band gap width and electronic structure of tin dioxide can be changed by proper doping treatment, and its photocatalytic performance can be further improved. Using stannous tetrachloride pentahydrate, dodecylamine, oleic acid and lanthanum oxide as raw materials, tin dioxide nano-powders with different lanthanum doping amounts were synthesized by solvothermal method. XRD, SEM and EDS were used to characterize the samples, and the effects of different lanthanum oxide doping amounts on the morphology and structure of tin dioxide powder were investigated. Using Rhodamine B solution as the simulated pollutant, the effects of La doping, Rhodamine B initial concentration and photocatalyst dosage on the photocatalytic performance of tin dioxide powder were studied. The results show that lanthanum is successfully incorporated into SnO2, and no other impurities are introduced in the synthesis of lanthanum doped SnO2, which is a single tetragonal phase; and The electronic structure of SnO2 is changed by lanthanum doping, and the band gap width of SnO2 is reduced to 3.2ev by 5% lanthanum doping. The doping of lanthanum oxide can promote the photocatalytic performance of tin dioxide. When the doping amount is 5%, the degradation rate of Rhodamine B reaches the highest, that is, the degradation rate of Rhodamine B is 100% when the sample with the doping amount of lanthanum 5% is added to 10mg/L Rhodamine B with 80mg to 100ml. |
| Keywords: | Lanthanum Doping; Stannic Oxide Nanometer Powder; Photocatalysis |
基金
| 1. | 景德镇市级科技计划项目(Nos. 20234NY006, 20234SF009)、景德镇陶瓷大学研究生创新创业项目 (No. JYC202312) |
| 2. | 大学本科生创新项目(Nos. X202310408145, X202310408140) |
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