Ba4In2O7的自蔓延燃烧合成及其光催化性能*

doi:10.11901/1005.3093.2014.286

材料研究学报

2015, Vol. 29

Issue (1): 39-44 DOI: 10.11901/1005.3093.2014.286

本期目录 | 过刊浏览

Ba₄In₂O₇的自蔓延燃烧合成及其光催化性能*

张钦库^1,²,姚秉华^1,³(

),彭超¹,孙路康¹

1. 西安理工大学应用化学系西安 710048
2. 榆林学院建筑工程系榆林 719000
3. 陕西省尾矿资源综合利用重点实验室(商洛学院) 商洛 726000

Self-propagating Combustion Synthesis of Ba₄In₂O₇ and Its Photocatalytic Activity

Qinku ZHANG^1,²,Binghua YAO^1,^3,^**(

),Chao PENG¹,Lukang SUN¹

1. Department of Applied Chemistry, Xi’an University of Technology, Xi’an 710048, China
2. Department of Building Engineering, Yulin University, Yulin 719000, China
3. Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources (Shangluo University), Shangluo 726000, China

引用本文:

张钦库,姚秉华,彭超,孙路康. Ba₄In₂O₇的自蔓延燃烧合成及其光催化性能*[J]. 材料研究学报, 2015, 29(1): 39-44.
Qinku ZHANG, Binghua YAO, Chao PENG, Lukang SUN. Self-propagating Combustion Synthesis of Ba₄In₂O₇ and Its Photocatalytic Activity[J]. Chinese Journal of Materials Research, 2015, 29(1): 39-44.

全文: PDF(900 KB) HTML

摘要:

以Ba(NO₃)₂和In(NO₃)₃为起始物, 以甘氨酸为燃料, 用自蔓延燃烧合成法制备四方晶系Ba₄In₂O₇, 用X射线衍射(XRD)、热重-差热分析(TG-DTA)、紫外-可见漫反射光谱(UV-vis DRS) 和氮气吸附-脱附等温线(BET)等手段对样品进行表征, 研究了合成条件对产物的形成和性能的影响。以罗丹明B(RhB)为降解模型, 研究了焙烧温度(T)、焙烧时间(t)、钡铟摩尔比(Ba/In)、甘氨酸与金属离子摩尔比(G/M)和RhB初始浓度对样品光催化性能的影响。结果表明, 在T=800℃、t=1 h、Ba/In= 2∶1和G/M=2∶1条件下合成的Ba₄In₂O₇具有四方晶系结构, 纯度高, 光催化活性优异。用高压汞灯(125 W)辐照3 h可将5 mg/L的RhB溶液有效降解, 其脱色率达到96.5%, 降解过程服从一级动力学模型。

关键词 ：无机非金属材料, Ba₄In₂O₇, 光催化, 自蔓延燃烧合成, 罗丹明B

Abstract：

The compounds of tetragonal Ba₄In₂O₇were synthesized by self-propagating combustion synthesis method from raw materials of Ba(NO₃)₂, In(NO₃)₃and Glycine. The effect of synthesis conditions on the formation and photocatalytic activity of the compounds was investigated. The synthesized Ba₄In₂O₇ was characterized by X-ray diffraction (XRD), thermogravimetric analysis-differential thermal analysis (TG-DTA), UV-visible diffuse reflectance spectroscopy (UV-vis DRS) and N₂ adsorption-desorption isotherms (BET), respectively. With rhodamine B (RhB) as a model degradation compound, the effect of calcinations temperature (T), calcinations time (t), Ba to In molar ratio (Ba/In), Glycine to metal ion molar ratio(G/M) and the initial concentration of RhB on the photocatalytic activity of Ba₄In₂O₇ was investigated. The results show that the synthetic Ba₄In₂O₇, prepared by conditions of T=800℃, t=1 h, Ba/In= 2∶1 and G/M=2∶1, has tetragonal structure, higher purity and excellent photocatalytic activity. The RhB (5 mg/L) can be completely decomposed in 3 h under lighting of a high pressure mercury lamp (125 W), and the decolorization rate of RhB can reach 96.5%. The degrading process fits the first-order kinetic model.

Key words： inorganic non-metallic materials Ba₄In₂O₇ photocatalysis self-propagating combustion synthesis rhodamine B

收稿日期: 2014-06-16

基金资助:* 国家自然科学基金项目21276208, 陕西省教育厅专项基金11JK0569, 陕西省尾矿资源综合利用重点实验室(商洛学院)开放基金2014SKY-WK003和西安理工大学博士学位论文创新基金207-002J1304资助。

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https://www.cjmr.org/CN/10.11901/1005.3093.2014.286 或 https://www.cjmr.org/CN/Y2015/V29/I1/39

图1 Ba4In2O7样品的XRD谱

图2 Ba4In2O7的UV-vis DRS谱及(αhν)2-hν曲线

图3 Ba4In2O7前驱体的TG-DTA曲线

图4 Ba4In2O7样品的吸(脱)附曲线和孔径分布图

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