- 上一篇：年产1000吨洗模胶车间工艺设计
- 下一篇：MFe2O4-ZnO半导体材料的制备以及阳离子对其光催化还原CO2性能的影响
摘要：通过一个简单的氧化还原路线，对ZnO进行不同程度的表面处理。随后对经过表面处理的氧化锌材料的形貌、表面结构、粒径大小等特性进行了表征。，分别是X射线衍射，N 2物理吸附测量，紫外可见，PL光谱，SEM，TEM和二氧化碳吸附的FTIR。表征结果证实，表面处理后所得的ZnO复合材料具有高比表面积，能减小光的吸附能力，并且不会影响晶体结构的优点。通过反应性能和CO2-FTIR发现，适当的表面氧化处理可以有效地促进CO2吸附和增强生成的b-CO32-中间体，调高H2O2浓度后ZnO催化剂的甲烷产量是纯的ZnO催化剂的上百倍。同时，延长反应时间，ZnO催化剂更偏向于CO2和H2O混合选择性生成CH3OH。可能是由于电子迅速分离传送到催化材料表面的OH基团，这直接关系到甲醇的产量。61831
毕业论文关键词：氧化锌;二氧化碳光催化;二氧化碳吸附中间体;表面处理
Effect of ZnO surface treatment on photocatalytic reduction of CO2
Abstract: Through a simple redox route, the ZnO were treated with different degrees of surface treatment. The morphology, surface structure, particle size and other characteristics of the surface treated Zinc Oxide were characterized. X ray diffraction, N 2 physical adsorption measurements, UV Vis, PL spectroscopy, SEM, TEM and carbon dioxide adsorption of FTIR. Characterization results show that the surface treatment of the resulting ZnO Composite with high specific surface area, can reduce the adsorption capacity of Hikari and will not affect the crystal structure of the advantages. Appropriate surface oxidation treatment can effectively promote adsorption of CO2 and enhanced generation of b-CO32- intermediates, adjustable high H2O2 concentration ZnO catalyst for methane production is a hundred times more than that of the pure ZnO catalyst, found through the reaction performance and CO2-FTIR. At the same time, increasing the reaction temperature, ZnO catalyst is more inclined to the CO2 and H2O mixed selective generation CH3OH. May be due to the rapid separation of electrons transferred to the catalytic material surface of the OH group, which is directly related to the production of methanol.
Keywords: Zinc Oxide; carbon dioxide photo catalysis; carbon dioxide adsorption intermediate;
摘要 i
Abstract i
1.1 研究的意义 2
1.2 研究进展 3
1.3 ZNO的晶体结构 4
1.4 提高光催化的途径 5
1.4.1 半导体复合 5
1.4.2 离子掺杂 5
1.4.3 表面贵金属沉积 5
1.4.4 表面敏化 6
2. 实验部分 6
2.1 药品试剂及实验设备 6
2.1.1 试剂 6
2.1.2 实验器材 6
2.2 半导体材料的制备
-
石墨烯负载ZnO等纳米颗粒的制备及性能研究
-
MFe2O4-ZnO半导体材料的制备...
-
氧化石墨-ZnO-BiOI的制备及...
-
Fe3O4@ZnO复合吸波材料的制备及其性能研究
-
Zn4CO3(OH)6具有多孔结构ZnO发光纳米材料的制
-
锂电池负极材料ZnO/石墨烯电化学性能研究
-
不同形态ZnO纳米晶的制备及光催化性能研究
十二层带中心支撑钢结构...
酸性水汽提装置总汽提塔设计+CAD图纸
中考体育项目与体育教学合理结合的研究
乳业同业并购式全产业链...
当代大学生慈善意识研究+文献综述
杂拟谷盗体内共生菌沃尔...
河岸冲刷和泥沙淤积的监测国内外研究现状
大众媒体对公共政策制定的影响
电站锅炉暖风器设计任务书
java+mysql车辆管理系统的设计+源代码