室温合成片层花状氧化锌及其光催化

doi:10.3724/SP.J.1095.2014.30215

摘要/Abstract

摘要： 以聚乙烯吡咯烷酮(PVP) 为模板，硝酸锌和氢氧化钠为原材料，采用湿化学法，在室温（25 ℃）下，搅拌2 h合成了大量生长有序的片层花状氧化锌。讨论了物料比、时间和反应温度等条件对合成材料形貌和结构的影响。采用X射线衍射、扫描电子显微镜和高分辨透射电子显微镜（HRTEM）对其晶体结构和形态进行了表征。此外，实验中发现，花状氧化锌对罗丹明B染料有显著的光催化降解特性，在紫外光照射140 min，罗丹明 B的降解率达到98.6%。

关键词: 花状氧化锌, 聚乙烯吡咯烷酮, 光催化, 罗丹明B

Abstract: Lamella flower-like ZnO was prepared in a large-scale via a simple wet chemical method at room temperature(25 ℃) using polyvinylpyrrolidone(PVP) as template and zinc nitrate and sodium hydroxide as source materials. The effects of experimental parameters such as the amounts of reagents, the reaction time and temperature on the morphologies and structures of as-products were investigated in detail. The crystal features and morphologies of the products were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM) and high-resolution transmission electron microscopy(HRTEM), respectively. It was found that flower-like ZnO shows higher photocatalytic activity towards the degradation of rhodamine B under UV irradiation compared to commercial ZnO. The degradation efficiency of flower-like ZnO is up to 98.6% within 140 min.

Key words: flower-like zinc oxide, polyvinylpyrrolidone, photocatalysis, Rhodamine B

中图分类号:

O614

王瑞枝, 王真真, 张明, 李方方, 郭涵, 王爱军, 冯九菊. 室温合成片层花状氧化锌及其光催化[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.30215.

WANG Ruizhi, WANG Zhenzhen, ZHANG Ming, LI Fangfang, GUO Han, WANG Aijun, FENG Jiuju*. Room-temperature Synthesis and Photocatalytic Activity of Lamella Flower-like ZnO[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30215.

参考文献

[1] Hagfeldt A,Boschloo G,Sun L C,et al. Dye-Sensitized Solar Cells[J]. Chem Rev,2010,110(11):6595-6663.

[2] Ahmad R,Tripathy N,Hahn Y B. High-Performance Cholesterol Sensor Based on the Solution-Gated Field Effect Transistor Fabricated with ZnO Nanorods[J]. Biosen Bioelectron,2013,45(15):281-286.

[3] Shi Q,Wang Z L,Liu Y L,et al. Single-Phased Emission-Tunable Mg-Doped ZnO Phosphors for White LEDs[J]. J Alloys Compd,2013,553(15):172-176.

[4] Xu S,Wang Z L. One-Dimensional ZnO Nanostructures:Solution Growth and Functional Properties[J]. Nano Res,2011,4(11):1013-1098.

[5] Yu L G,Zhang G M,Li S Q,et al. Fabrication of Arrays of Zinc Oxide Nanorods and Nanotubes in Aqueous Solution under an External Voltage[J]. J Cryst Growth,2007,299(1):184-188.

[6] Sun Y,Ndifor-Angwafor N G,Riley D J,et al. Synthesis and Photoluminescence of Ultra-Thin ZnO Nanowire/Nanotube Arrays Formed by Hydrothermal Growth[J]. Chem Phys Lett,2006,431(4-6):352-357.

[7] Liu J,Xu L L,Wei B,et al. One-step Hydrothermal Synthesis and Optical Properties of Aluminium Doped ZnO Hexagonal Nanoplates on a Zinc Substrate[J]. Cryst Eng Comm,2011,13(5):1283-1286.

[8] Wang X Z,Liu W,Liu J R,et al. Synthesis of Nestlike ZnO Hierarchically Porous Structures and Analysis of Their Gas Sensing Properties[J]. ACS Appl Mater Interfaces,2012,4(2):817-825.

[9] Feng J J,Liao Q C,Wang A J,et al. Mannite Supported Hydrothermal Synthesis of Hollow Flower-Like ZnO Structures for Photocatalytic Applications[J]. Cryst Eng Comm,2011,13(12):4202-4210.

[10] Wang Y X,Li X Y,Lu G,et al. Highly Oriented 1-D ZnO Nanorod Arrays on Zinc Foil:Direct Growth from Substrate, Optical Properties and Photocatalytic Activities[J]. J Phys Chem C,2008,112(19):7332-7336.

[11] Stankovic A,Dimitrijevic S,Uskokovic D. Influence of Size Scale and Morphology on Antibacterial Properties of ZnO Powders Hydrothemally Synthesized Using Different Surface Stabilizing Agents[J]. Colloid Surf B,2013,102:21-28.

[12] Gu P F,Wang X D,Li T,et al. Synthesis, Characterization and Photoluminescence of ZnO Spindles by Polyvinylpyrrolidone-Assisted Low-Temperature Wet-Chemistry Process[J]. J Cryst Growth,2012,338(1):162-165.

[13] Zeng J H,Jin B B,Wang Y F. Facet Enhanced Photocatalytic Effect with Uniform Single-Crystalline Zinc Oxide Nanodisks[J]. Chem Phys Lett,2009,472(1/3):90-95.

[14] Wang A J,Liao Q C,Feng J J,et al. Apple Pectin-Mediated Green Synthesis of Hollow Double-Caged Peanut-Like ZnO Hierarchical Superstructures and Photocatalytic Applications[J]. Cryst Eng Comm,2012,14(1):256-263.

[15] Chang J,Waclawik E R. Facet-Controlled Self-Assembly of ZnO Nanocrystals by Non-Hydrolytic Aminolysis and Their Photodegradation Activities[J]. Cryst Eng Comm,2012,14(11):4041-4048.