Ho3+掺杂铁酸铋的制备及光催化性

doi:10.11944/j.issn.1000-0518.2019.01.180080

摘要/Abstract

摘要：

为提高铁酸铋磁性和光催化性能,通过低温热分解前驱体快速制备出可磁分离回收的Ho³⁺掺杂铁酸铋复合物Bi_0.95Ho_0.05FeO₃纳米颗粒,并用X粉末衍射仪(XRD)、傅里叶红外变换光谱仪(FT-IR)、紫外可见漫反射光谱仪(DRS),磁强计(VSM)和Zeta电位仪等多种手段对物相和性质进行表征,同时以甲基橙(MO)为降解模型,考察溶液的酸碱性和常见无机阴离子共存下其光催化性能。结果显示,产物以R3c相铁酸铋为主,带隙为1.90 eV,Ho³⁺掺杂后使铁酸铋的磁性增强了4倍,催化性能提高30%。而该催化剂的催化性能受降解溶液本身酸碱性以及共存阴离子的氧化性与酸碱性的影响。另外,对该催化剂的回收也进行了研究。结果表明,所得催化剂可通过磁分离回收,从而反复利用。

关键词: 铁酸铋, Ho³⁺, 甲基橙, 光催化, 磁性

Abstract:

In order to improve photocalytic property and enhance magnetism of BiFeO₃(BFO), nano-sized Bi_0.95Ho_0.05FeO₃(BHFO) particles were prepared through thermal decomposition of coordination precursor at 500 ℃. The material obtained was characterized by X-ray diffractometer(XRD), Fourier transfom infrared(FT-IR) spectrometer, dynamic reflectance spectrometer(DRS), vibrating sample magnetometer(VSM), and Zeta potential analyser. It exhibits rhombohedral R3c phase with a band gap of 1.90 eV, and its magnetism is 5 times stronger than BFO. With methyl orange(MO) as the degradation model, the influence factors on photocatalytic activity of BHFO was found to be affected by the oxidization and acid-base property of anions. At last, BHFO exhibits good photocatalytic stability and can be recovered by magnetical separation.

Key words: BiFeO₃, Ho³⁺, methyl orange, photo-catalysis, magnetic property

李文进, 姚威龙, 徐嘉鑫, 蒋琪英, 邓洪权. Ho³⁺掺杂铁酸铋的制备及光催化性[J]. 应用化学, 2019, 36(1): 91-96.

LI Wenjin, YAO Weilong, XU Jiaxin, JIANG Qiying, DENG Hongquan. Preparation and Photocatalytic Properties of Ho³⁺ Doping BiFeO₃[J]. Chinese Journal of Applied Chemistry, 2019, 36(1): 91-96.

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Ho³⁺掺杂铁酸铋的制备及光催化性

Preparation and Photocatalytic Properties of Ho³⁺ Doping BiFeO₃

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