燃料对溶液燃烧合成ZnO纳米棒微观形貌和光催化性能的影响

doi:10.3724/SP.J.1077.2013.12634

无机材料学报 ›› 2013, Vol. 28 ›› Issue (8): 880-884.DOI: 10.3724/SP.J.1077.2013.12634 CSTR: 32189.14.SP.J.1077.2013.12634

燃料对溶液燃烧合成ZnO纳米棒微观形貌和光催化性能的影响

李家科, 刘欣

(1. 景德镇陶瓷学院材料科学与工程学院, 景德镇 333001; 2. 江西省先进陶瓷材料重点实验室, 景德镇 333001)

收稿日期:2012-10-21 修回日期:2012-12-03 出版日期:2013-08-20 网络出版日期:2013-07-15

Effects of Fuel on Morphology and Photocatalytic Performance of ZnO Nanorods Synthesized by Solution Combustion Method

LI Jia-Ke, LIU Xin

(1. School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001, China; 2. Key Laboratory of Jiangxi Province for Advanced Ceramic Materials, Jingdezhen 333001, China)

Received:2012-10-21 Revised:2012-12-03 Published:2013-08-20 Online:2013-07-15

摘要/Abstract

摘要： 以蔗糖、柠檬酸、乙二醇和尿素为燃料, Zn(NO₃)₂为氧化剂/锌源, 采用溶液燃烧法合成ZnO纳米棒。借助XRD、SEM、比表面分析和光谱吸收等测试方法, 考察了不同燃料对粉体的物相组成、微观形貌、比表面积和光催化性能的影响。结果表明: 在点燃温度500℃下, 各燃料配制的前驱体溶液均可发生燃烧反应合成六方相ZnO纳米棒, 其平均径向尺寸小于100 nm, 且以尿素为燃料合成的ZnO晶形更完整, 以蔗糖为燃料合成的ZnO粉体具有最大的比表面积(24.83 m²/g)。光催化实验表明, 以蔗糖为燃料合成的ZnO粉体光催化能力最佳, 在高压汞灯照射60 min条件下, 其对甲基橙溶液(10 mg/L)的降解率可达98.2%, 且光催化反应符合一级动力学方程。

关键词: 溶液燃烧法, 燃料, ZnO, 微观形貌, 光催化性能

Abstract: ZnO nanorods was synthesized by solution combustion method using sucrose, citric acid, glycol (or urea) as fuel, and Zn (NO₃)₂ as oxidant. Effects of fuels (namely sucrose, citric acid, glycol or urea) on phase composition, morphology, specific surface area and photocatalytic performance of as-synthesized ZnO were investigated by means of XRD, SEM, BET and absorption spectrum. The results show that ZnO nanorods (average radial size less than 100?nm) with a hexagonal crystal structure can be synthesized at ignition temperature of 500℃. ZnO owns the best crystallization or the highest specific surface area (24.83 m²/g) when using urea or sucrose as fuel, respectively. Photocatalytic tests show that as-synthesized ZnO using sucrose as fuel owns the best photocatalytic performance. The photodegradation efficiency to methyl orange solution (10 ml/L) is 98.2% under the high-pressure mercury lamp irradiation for 60?min, and the reaction is described as the pseudo first order kinetics equation.

Key words: solution combustion method, fuel, ZnO, morphology, photocatalytic performance

中图分类号:

O614

李家科, 刘欣. 燃料对溶液燃烧合成ZnO纳米棒微观形貌和光催化性能的影响[J]. 无机材料学报, 2013, 28(8): 880-884.

LI Jia-Ke, LIU Xin . Effects of Fuel on Morphology and Photocatalytic Performance of ZnO Nanorods Synthesized by Solution Combustion Method[J]. Journal of Inorganic Materials, 2013, 28(8): 880-884.

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燃料对溶液燃烧合成ZnO纳米棒微观形貌和光催化性能的影响

Effects of Fuel on Morphology and Photocatalytic Performance of ZnO Nanorods Synthesized by Solution Combustion Method

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