沉淀法制备Bi2O3的晶相转变过程及其光催化性能

doi:10.3866/PKU.WHXB201602231

物理化学学报 >> 2016, Vol. 32 >> Issue (5): 1247-1256.doi: 10.3866/PKU.WHXB201602231

沉淀法制备Bi₂O₃的晶相转变过程及其光催化性能

刘果¹,卢圆圆¹,张静^1,*(),李智^2,*(),冯兆池³,李灿³

¹ 辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001
² 中国科学院理化技术研究所,光化学转换与功能材料重点实验室,北京100190
³ 中国科学院大连化学物理研究所,催化基础国家重点实验室,辽宁大连116023

收稿日期:2015-11-19 发布日期:2016-05-07
通讯作者: 张静,李智 E-mail:jingzhang_dicp@live.cn;zhili@126.com
基金资助:
国家自然科学基金(21573101);教育部留学回国科研启动基金(教外司留[2013]1792号);辽宁省自然科学基金(2014020107);辽宁省高等学校优秀人才支持计划项目(LJQ2014041);中国科学院理化技术研究所光化学转换与功能材料重点实验室开放课题资助

Phase Transformation and Photocatalytic Properties of Bi₂O₃ Prepared Using a Precipitation Method

Guo LIU¹,Yuan-Yuan LU¹,Jing ZHANG^1,*(),Zhi LI^2,*(),Zhao-Chi FENG³,Can LI³

¹ School of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113001, Liaoning Province, P. R. China
² Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
³ State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, P. R. China

Received:2015-11-19 Published:2016-05-07
Contact: Jing ZHANG,Zhi LI E-mail:jingzhang_dicp@live.cn;zhili@126.com
Supported by:
the National Natural Science Foundation of China(21573101);Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China(教外司留[2013]1792号);Natural Science Foundation of Liaoning Province, China(2014020107);Program for Liaoning Excellent Talents in University, China(LJQ2014041);Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences

摘要/Abstract

摘要：

以硝酸铋为原料,氨水为沉淀剂,通过液相沉淀法制得前驱体Bi(OH)₃,并将Bi(OH)₃分别在不同温度和时间下焙烧。利用X射线衍射(XRD)、拉曼光谱、热重(TG)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)及紫外-可见漫反射光谱(UV-Vis DRS)详细研究了Bi(OH)₃转变为Bi₂O₃的过程及相变过程中粒子形貌、大小、光吸收性质等。结果表明,前驱体Bi(OH)₃经过焙烧之后,发生了如下的转变过程:Bi(OH)₃→Bi₅O₇NO₃→β-Bi₂O₃/Bi₅O₇NO₃→β-Bi₂O₃/Bi₅O₇NO₃/α-Bi₂O₃→α-Bi₂O₃,而且转变过程伴随着粒子长大。在上述转变过程中,与Bi₅O₇NO₃向β-Bi₂O₃转变的过程相比,从β-Bi₂O₃到α-Bi₂O₃相变过程更为迅速。此外,以光催化降解罗丹明B(RhB)为模型反应,考察了不同晶相的Bi₂O₃光催化活性,结果表明Bi₅O₇NO₃和β-Bi₂O₃材料具有优异的光催化性能,而α-Bi₂O₃具有较低的光催化活性。

关键词: Bi₅O₇NO₃, β-Bi₂O₃, α-Bi₂O₃, 氧化铋, 沉淀法, 相变

Abstract:

A Bi(OH)₃ precursor was prepared using a precipitation method using bismuth nitrate as a starting material and ammonia as the precipitation agent. Bi(OH)₃ was then calcined at different temperatures and different time. X-ray diffraction (XRD), Raman spectroscopy, thermogravimetry (TG), scanning electronic microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and UV-Vis diffuse reflectance spectroscopy (UVVis DRS) were used to investigate the phase transformation from Bi(OH)₃ to Bi₂O₃ and the particle size, morphology, and optical properties of Bi₂O₃ during the phase transformation. It was found that Bi(OH)₃ after calcination undergoes the following process: Bi(OH)₃→Bi₅O₇NO₃→β-Bi₂O₃/Bi₅O₇NO₃→β-Bi₂O₃/Bi₅O₇NO₃/α-Bi₂O₃→α-Bi₂O₃. It was observed that the above phase transformation from Bi(OH)₃ to Bi₂O₃ and the growth of the particle size are interrelated. It was also found that the phase transition from β-Bi₂O₃ to α-Bi₂O₃ was faster compared with the phase transition from Bi₅O₇NO₃ to β-Bi₂O₃. Also, the degradation of Rhodamine B (RhB) was studied to investigate and compare the photocatalytic performance of Bi₂O₃ with different crystalline phases. The result indicates that Bi₅O₇NO₃ and β-Bi₂O₃ exhibit excellent photocatalytic performance, while α-Bi₂O₃ has a low photocatalytic activity.

Key words: Bi₅O₇NO₃, β-Bi₂O₃, α-Bi₂O₃, Bismuth oxide, Precipitation method, Phase transformation

刘果,卢圆圆,张静,李智,冯兆池,李灿. 沉淀法制备Bi₂O₃的晶相转变过程及其光催化性能[J]. 物理化学学报, 2016, 32(5), 1247-1256. doi: 10.3866/PKU.WHXB201602231

Guo LIU,Yuan-Yuan LU,Jing ZHANG,Zhi LI,Zhao-Chi FENG,Can LI. Phase Transformation and Photocatalytic Properties of Bi₂O₃ Prepared Using a Precipitation Method[J]. Acta Phys. -Chim. Sin. 2016, 32(5), 1247-1256. doi: 10.3866/PKU.WHXB201602231

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB201602231

https://www.whxb.pku.edu.cn/CN/Y2016/V32/I5/1247

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沉淀法制备Bi₂O₃的晶相转变过程及其光催化性能

Phase Transformation and Photocatalytic Properties of Bi₂O₃ Prepared Using a Precipitation Method

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