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Preparation of Novel C/N-Doped LaFeO3 Type Perovskite for Efficient Photocatalytic Degradation of Sodium Humate
ACS Omega ( IF 3.7 ) Pub Date : 2023-10-26 , DOI: 10.1021/acsomega.3c06161
Pengcheng Hao 1 , Yanli Suo 1 , Rui Shi 1 , Juan Zhang 1 , Bo Li 1 , Zhen Yan 1 , Jing Wang 1 , Bo Liu 1 , Zhongzhi Wang 1 , Xin Qiao 1
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LaFeO3 chalcocite precursor was prepared by solid-phase milling method, and LaFeO3-type chalcocite composite catalyst, referred to as LFCN catalyst, was synthesized by in situ doping of carbon and nitrogen (urea, melamine, dicyandiamide, and carbon powder), The catalytic performance of the catalysts was investigated by the different mass ratios of LaFeO3 chalcocite precursor and carbon and nitrogen (1:1, 1:2, and 2:1) and the degradation mechanism. Various characterization analyses, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brunauer–Emmett–Teller (BET), showed that the doped composite LFCN catalysts exhibited a hemispherical network structure with a larger specific surface area than that of the pure phase LaFeO3 material. In addition, the LaFeO3 material adjusted the electronic structure of the original LaFeO3 chalcogenide material to a certain extent after in situ doping with organic C and N elements, which enhanced its lattice oxygen oxidation ability. In the study of the catalytic degradation of sodium humate solution under natural light conditions, the catalytic performance was significantly improved compared to that of the pure phase LaFeO3, and 10 mg of the catalyst degraded 30 mg/L of sodium humate solution in 50 min, with a degradation rate increasing from 40 to 98%. The degradation rate increased from 40 to 98% after 4 applications, indicating that the LFCN catalyst has good stability and significant catalytic degradation performance.

中文翻译:

新型C/N掺杂LaFeO3型钙钛矿的制备及其高效光催化降解腐植酸钠

采用固相球磨法制备了LaFeO 3辉铜矿前驱体,通过原位掺杂碳、氮(尿素、三聚氰胺、双氰胺、碳粉)合成了LaFeO 3型辉铜矿复合催化剂,简称LFCN催化剂,通过LaFeO 3辉铜矿前驱体与碳、氮的不同质量比(1:1、1:2和2:1)考察了催化剂的催化性能和降解机理。X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和Brunauer-Emmett-Teller(BET)等各种表征分析表明,掺杂的复合LFCN催化剂表现出半球形网络结构比纯相LaFeO 3材料具有更大的比表面积。另外,LaFeO 3材料原位掺杂有机C、N元素后,在一定程度上调整了原有LaFeO 3硫系材料的电子结构,增强了其晶格氧氧化能力。在自然光条件下催化降解腐植酸钠溶液的研究中,催化性能较纯相LaFeO 3显着提高,10 mg催化剂在50 min内降解30 mg/L腐植酸钠溶液,降解率从40%增加到98%。使用4次后降解率从40%提高到98%,表明LFCN催化剂具有良好的稳定性和显着的催化降解性能。
更新日期:2023-10-26
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