1、.页眉.页脚Cu2O 论文：Cu_2O-氧化物复合光催化薄膜的制备及光催化性能研究【中文摘要】本文采用电化学沉积法和化学法在导电玻璃(ITO)和普通玻璃基底上制备 Cu2O-氧化物复合光催化薄膜,在可见光照射下,对活性艳红染料废水、敌百虫等目标降解物进行光催化降解反应的研究。分别采用 X 射线衍射(XRD),扫描电子显微镜(SEM),拉曼散射对不同方法、不同工艺条件下制备的复合薄膜的相结构,表面形貌和拉曼散射特性进行了分析与测试。系统研究了各工艺参数对其结构和性能的影响。研究结果如下：采用电化学法,以 ITO 导电玻璃、铂薄片为工作电极,以硫酸铜和乳酸体系沉积 Cu2O 薄膜,以硝酸锌和硝酸钾
2、体系沉积 ZnO 薄膜,确定所制备的薄膜是纯 Cu2O 晶体和纯ZnO 晶体,成功合成了 Cu2O-ZnO 薄膜。通过 SEM 图片观察,所制 Cu2O晶型为粒径均一的立方体结构,ZnO 为扁六方柱晶体。电解液 pH、沉积电流等对薄膜表面形态都有一定的影响；利用化学法,制备出ZnO-Cu2O 复合光催化薄膜,同时制备了 Fe2O3-Cu2O、SnO2-Cu2O、SiO2-Cu2O 复合光催化薄膜,确定所制备的薄膜是纯 ZnO 晶体,属于六角铅锌矿结构；通过 SEM 测定可知,400体系下制备 ZnO 薄膜结晶性很好,分布均匀,颗粒比表面积大,所得的 ZnO-Cu2O 复合薄膜平整且界面清晰。随
3、着退火温度提高,ZnO 晶粒增大；分别采用电化学法和化学法制备复合光催化薄膜对难降解物活性艳红溶液进行光催化研究,结果表明,电化学法制备的薄膜中 Cu2O-ZnO 复合薄膜光.页眉.页脚催化效果最优,相同时间内,10ml 浓度为 25mg/l 的活性艳红降解率达到 99.7%；化学法制备的薄膜中 ZnO-Cu2O 复合膜的光催化效果最优,相同光照时间内,10ml 浓度为 25mg/l 的活性艳红降解率达100%；考察单因素实验得知,最终得出制备 Cu2O-ZnO 复合薄膜的优化工艺条件为：电解液浓度 0.4M,pH 为 7.88,水浴温度为 60,沉积电流为 0.025A,沉积时间为 30mi
4、n；制备 ZnO-Cu2O 的优化工艺：醋酸锌与无水乙醇的摩尔比为 1：85,乳酸 6ml,热处理温度 400,薄膜为 5 层；通过利用不同方法制备的和同种方法不同条件制备的Cu2O-ZnO、ZnO-Cu2O 复合光催化薄膜,对敌百虫进行光催化降解,复合薄膜的降解效果优于单纯薄膜。初始浓度为 60mg/l,光照 10h,各薄膜光催化对敌百虫 COD 的去除率分别达到：电化学法制备 Cu2O-ZnO 91.2%、ZnO-Cu2O 85.4%、Cu2O 51.1%；化学法制备 ZnO-Cu2O88.7%、ZnO 53.6%。说明 Cu2O-ZnO 复合光催化薄膜降解敌百虫取得较好的效果。Cu2O-
5、ZnO 复合光催化薄膜对敌百虫的降解符合一级动力学规律。【英文摘要】In this shudy, Cu2O-Oxide composite photocatalyst thin films were prepared by electrochemical deposition and Chemical method, then some typical wastewater and Organophosphate trichlorfon as the study object was leading research direction.X-ray diffraction(XRD), scan
6、ning electron microscopy(SEM),Raman scattering were used to analysis and testing the phase .页眉.页脚structure of composite films and the morphology of the surface which were prepar in different ways under different conditions.Systematically studied various process parameters on the structure and proper
7、ties.The results sa follows:A conventional two-electrode cell was used with an ITO substrate and a platinum as the working electrode, thin films of Cu2O were electrodeposited in copper sulfate and lactic acid, thin films of ZnO were electrodeposited in zinc nitrate and potassium nitrate, The morphol
8、ogical structure of the photocatalyst particles was characterized by XRD,SEM and so on. The result showed that the product was indeed Cu2O and ZnO which were preparated by electrochemical deposition, the morphology of Cu2O and ZnO particles were uniform cubic structure and hexagonal crystals respect
9、ively,successful synthesis of Cu2O-ZnO thin films at the same time. The pH value of electrolyte, current of electrochemical deposition and so on have influence on the Surface morphology of the films.Preparation of the ZnO-Cu2O composite films by Sol-gel method, use slide as the carrier, preparation
10、of Fe2O3-Cu2O, SnO2-Cu2O, SiO2-Cu2O composite thin film catalyst, the result showed that the product was indeed ZnO which .页眉.页脚were preparated by Sol-gel, and the morphology of ZnO particles was uniform structure of hexagonal zinc, Measured by SEM shows that ZnO thin films prepared at 400system hav
11、e good crystallinity, distribution uniform, large specific surface area of particles,and there are flat and clear interface of Composite films. As the annealing temperature increases, ZnO grain size also increases.Use electrochemical and chemical method respectively to preparation of composite photo
12、catalytic films,then research the photocatalytic of degradation refractory materials for activity of dye solution. The results show that, preparation Cu20-Zn0 composite film by electrochemical have the best effect in photocatalytic, in the same time,10ml volume concentration of 25mg/1 of the activit
13、y red for the degradation rate is 99.7%.However ZnO-Cu2O composite film which was prepared by chemical method have the best effect of photochemical catalysis, in the same time,10ml volume concentration of 25mg/l of the activity red for the for the degradation rate is 99.7%. The single factor experim
14、ents showed that,the concentration was the most important factor on the photocatalytic activity,followed by the pH and the temperature.The optimum conditions of the Cu2O-ZnO thin .页眉.页脚film were:the concentration of electrolyte was 0.4M,pH was 7.88, temperature was 60, deposition current was 0.025A,
15、 deposition time was 30min. The single factor experiments showed that,the layers is the most important factor on the photocatalytic activity,followed by the lactic acid and the temperature.The optimum conditions of the ZnO- CU2O thin film were:zinc acetate:ethanol=1:85, lactic acid 6ml, five layers
16、and calcination temperature was 400.The Cu2O-ZnO and ZnO- Cu2O which were preparated by different methods and the different preparation conditions of the different method were used to decompose the trichlorfon. The degradation result of the compound membrane is superior to the simple membrane. The i
17、nitial density is 60mg/l, illumination 10h, Removal rate to metrifonate COD respectively reach:electroplating Cu2O-ZnO was 91.2%, electroplating ZnO-Cu2O was 85.4%, Sol-gel ZnO-Cu2O was 88.7%, Sol-gel ZnO was 53.6%, electroplating Cu2O was 51.1%, This shows that Cu2O- ZnO compound photocatalyst dege
18、neration dibaichong obtains the good effect, the degradation of trichlorfon in accordance with level dynamics law.【关键词】Cu2O 复合薄膜 表征 染料废水 敌百虫 光催化.页眉.页脚【英文关键词】Cu2O compound thin film preparation dye wastewater photocatalysis【目录】Cu_2O-氧化物复合光催化薄膜的制备及光催化性能研究 摘要 3-5 Abstract 5-6 第 1章 绪论 9-19 1.1 引言 9 1.2
19、光催化的研究现状 9-17 1.2.1 光催化氧化技术的机理 9-10 1.2.2 光催化材料的研究 10-11 1.2.3 光催化剂的形态研究 11-13 1.2.4 Cu_2O 光催化剂的研究现状 13-14 1.2.5 Cu_2O 薄膜的掺杂与改性 14-17 1.3 选题的目的与意义 17-19 1.3.1 选题的意义 17 1.3.2 研究主要内容 17-19 第 2 章 电化学法制备 Cu_2O-氧化物复合薄膜及其表征 19-27 2.1 电化学沉积的基本原理 19 2.2 实验试剂与仪器、试验流程图、实验装置 19-22 2.2.1 实验试剂 20 2.2.2 实验仪器 20 2
20、.2.3 实验流程图 20-21 2.2.4 实验装置 21-22 2.3 实验内容 22 2.3.1 电化学沉积 Cu_2O-ZnO 复合薄膜 22 2.3.2 电化学沉积 ZnO-Cu_2O 复合薄膜 22 2.4 样品的表征 22-23 2.5 结果与讨论 23-26 2.5.1 制备因素 23 2.5.2 XRD 分析 23-24 2.5.3 SEM 分析 24-26 2.6 小结 26-27 第 3章 化学法制备 Cu_2O-氧化物复合薄膜及其表征 27-37 .页眉.页脚3.1 溶胶-凝胶法的原理 27 3.2 实验试剂与仪器、实验流程图、实验装置 27-29 3.2.1 实验试剂
21、 27 3.2.2 实验仪器 27-28 3.2.3 实验流程图 28 3.2.4 实验装置 28-29 3.3 实验内容 29-30 3.3.1 载玻片的预处理 29 3.3.2 溶胶的制备 29-30 3.3.3 成膜 30 3.4 结果与讨论 30-36 3.4.1 XRD 分析 30-33 3.4.2 SEM 分析 33-36 3.5 小结 36-37 第 4 章 Cu_2O-氧化物薄膜光催化处理染料废水的研究 37-52 4.1 实验设备与试剂 37 4.2 实验内容与分析方法 37 4.2.1 实验内容 37 4.2.2 分析方法 37 4.3 结果与讨论 37-51 4.3.1
22、电化学制备 Cu_2O-氧化物薄膜光催化活性的研究 37-38 4.3.2 化学法制备Cu_2O-化物薄膜光催化活性的研究 38-41 4.3.3 紫外-可见吸收光谱 41-43 4.3.4 重复使用性能考察 43-44 4.3.5 制备薄膜光催化剂工艺参数的确定与优化 44-50 4.3.6 活性艳红初始浓度对薄膜光催化性能的影响 50-51 4.4 小结 51-52 第 5 章 Cu_2O-氧化物薄膜光催化降解敌百虫的研究 52-59 5.1 实验设备与试剂 52 5.2 实验内容与分析方法 52 5.3 结果与讨论 52-55 5.3.1 Cu_2O-氧化物薄膜对敌百虫的光降解研究 52-54 5.3.2 反应物的初始浓度与.页眉.页脚催化剂的活性研究 54-55 5.4 薄膜光催化剂的光催化降解动力学 55-58 5.5 小结 58-59 第6 章 结论与展望 59-61 6.1 结论 59-60 6.2 展望 60-61 参考文献 61-66 致谢 66-67
