摘要:以浓硫酸,高锰酸钾,石墨粉,硝酸钠为原料,采用氧化还原法制作石墨烯。以Nb2O5,KOH,尿素为原料,合成铌酸钾微球。在温室条件下通过简单搅拌制备得到了氧化石墨烯包覆的铌酸钾微球。利用XRD表征了产物的结构,通过透射电镜获得了铌酸钾微球的形貌。对不同浓度下的对硝基苯酚,铌酸钾微球的降解效率进行了试验。比较了纯铌酸钾微球与石墨烯包覆的铌酸钾微球对对硝基苯酚的降解效率。10mg的铌酸钾微球和石墨烯包覆的铌酸钾微球在25 mL 10 mg/L的对硝基苯酚溶液中进行充分的吸附脱附后,在紫外光的照射下进行降解,实验结果表明石墨烯包覆的铌酸钾微球对对硝基苯酚的降解效率更高。62015
毕业论文关键词:铌酸钾微球;降解;制备;光催化
Potassium niobate microspheres/oxide preparation and characterization of graphene/Ag composites
Abstract:With concentrated sulfuric acid, potassium permanganate, graphite powder, sodium nitrate as raw material, using REDOX legal system for graphene.With Nb2O5, KOH, urea as raw materials, synthesis of potassium niobate microspheres.Under the condition of greenhouse by simple mixing of preparation of the graphene oxide coated potassium niobate microspheres.Utilizing the means such as ultraviolet spectral characterization of the structure and morphology.Compared with the pure potassium niobate microspheres with graphene coated potassium niobate microspheres on the nitro phenol degradation efficiency.10 mg of potassium niobate microspheres and graphene coated potassium niobate microspheres in 25 ml of 10 mg/L of nitro phenol solution to fully adsorption is attached below, degradation under uv irradiation, the experimental results show that the graphene coated potassium niobate microspheres on the nitro phenol degradation efficiency is higher
目录
1引言 1
1.1 文献综述 1
1.2 石墨烯的性质和制备方法 2
1.2.1 石墨烯的结构和性质 2
1.2.2 石墨烯的制备方法 2
1.3 铌酸钾制备方法和形貌调控 3
1.3.1 铌酸钾的制备方法 2
1.4铌酸钾的应用 6
1.4.1铌酸钾在光催化方面的应用 6
1.4.2 铌酸钾复合体系在光催化方面的应用 6
1.5 选题意义及主要研究内容 7
2实验部分 8
2.1 实验仪器与试剂 8
2.1.1 主要试剂 8
2.1.2 主要仪器设备 8
2.2 实验步骤 8
2.2 1 石墨烯的制备 9
2.2.2 铌酸钾微球的制备 9
2.2.3 石墨烯/铌酸钾微球复合催化剂的制备 9
2.2.4 对硝基苯酚溶液的制备 9
2.2.5 10%盐酸的稀释 10
2.2.6 光催化性能测试 10
3 结果与讨论 12
3.1 样品的XRD分析 12
3.2 紫外-可见漫反射光谱分析 13
4 结论 21
致谢 22