ZnO-AgCl纳米复合材料以及钼系掺杂二氧化钛纳米管阵列的性能研究
发布时间：2018-10-15 07:33
【摘要】：近几年来,纳米科技的迅速发展,已经对社会的经济发展、科技进步以及人类生活等方面产生了巨大影响。从一开始的大型器件发展到如今被社会更加重视的小型器件,纳米科技作出了重大的贡献,它独特的力学、磁学、量子效应、尺寸效应以及高效的催化特性,都为这方面的研究提供了很大的便利。纳米氧化锌、二氧化钛在无机功能材料中占据着重要的地位,而一维纳米氧化锌、二氧化钛纳米管阵列的研究及改性给纳米领域的发展带来了空前的反响。本论文将研究重点主要放在纳米氧化锌的复合以及纳米二氧化钛的掺杂改性,目的是通过控制反应温度、原料比例、pH值等研究纳米微观结构生长速度及形貌,并对其光学性能及催化性能进行深入研究。本论文还对实习期间所做的顺酐污水处理项目进行了简要概述,根据原厂进、出水水质指标的要求,对顺酐污水进行厌氧处理,保证污水中残余的有机物和氨氮能够达标排放。具体研究内容如下：一、水热-沉淀两步法制备ZnO-AgCl复合纳米材料通过调整不同原料组成、反应温度、反应时间以及pH值等方式,对纳米ZnO-AgCl复合材料的形貌结构进行调控,制备结构紧密、规则有序的纳米簇结构。通过研究反应条件等因素对纳米复合材料的影响,并对其进行机理分析,初步确定了制备纳米ZnO-AgCl复合材料的最佳反应条件,即以pH=10、反应温度为30℃的条件下,以1：1的比例将0.1 mol/LC(NH4Cl)和AgCl(含量为20wt%)在避光的条件下进行反应2h,制得的ZnO-AgCl纳米簇形貌最佳。二、阳极氧化法制备Mo掺杂纳米二氧化钛无机功能材料本章着重研究掺杂Mo之后对二氧化钛纳米管阵列的影响,然而掺杂量、外加电压、pH值以及氧化时问成为主要研究影响因素,通过对以上因素进行控制调节,可制备出形貌可控、排列规则有序的纳米管阵列。在此基础上,设计正交试验方案,初步确定最佳反应条件,即最佳钼含量为1.0wt%,通入外加电压为40V的直流电源,设定pH值为6在醇水溶剂中氧化4h,即得形貌性质最佳的纳米二氧化钛改性材料。对制备样品进行光催化性能测试表征分析,掺杂Mo后TiO2纳米材料的光催化性能明显优于单一的TiO2纳米材料。通过分析样品的U-V吸收光谱,Mo掺杂后制备的样品发生吸收边红移现象并且在可见光区范围有强的吸收。可以表明,Mo掺杂TiO2样品在可见光下会有较高的光催化活性。三、厌氧工艺处理顺酐污水方案本项目污水种类多、污染物浓度高、成分复杂,进水COD≤20000mg/L。针对此类污水,首先采用“调节池+溶气气浮”工艺对原水进行预处理,降低出水油含量,减少由于水量和水质的波动对生化部分的冲击,利用水解酸化池对原水进行预算化,将大分子难降解有机物分解为小分子易降解有机物,然后采用我公司自主研发的专利设备“LIC双循环厌氧反应器”去除废水中绝大多数有机物质,避免高浓度废水对后续生化系统造成不良影响,再采用“A/O工艺+二沉池”对污水进一步处理,去除污水中残余的有机物和氨氮之后达标排放。
[Abstract]:In recent years, the rapid development of nano-technology has had a great influence on the social economic development, scientific and technological progress and human life. The development of large-scale devices from the beginning to the small-sized devices now being paid more attention by society has made great contributions to the nano-technology, and its unique mechanical, magnetic, quantum effect, size effect and high-efficiency catalytic properties provide great convenience for the research in this field. nano-zinc oxide and titanium dioxide occupy an important position in inorganic functional materials, and the research and modification of one-dimensional nano zinc oxide and titanium dioxide nanotube arrays has brought an unprecedented response to the development of the nano-field. This paper mainly focuses on the compounding of nano-zinc oxide and the doping modification of nano-TiO _ 2. The aim is to study the growth speed and morphology of nano-structure by controlling the reaction temperature, the ratio of raw materials and pH value, and to deeply study its optical properties and catalytic performance. The paper also gives a brief overview of the wastewater treatment project during the internship period. According to the requirements of the original factory inlet and outlet water quality index, anaerobic treatment is carried out on the sewage in Fushun, so as to ensure that the residual organic matter and ammonia nitrogen in the sewage can reach the standard. The specific research content is as follows: 1, the water heat-precipitation two-step method prepares the ZnO-alumina composite nano material by adjusting the composition of different raw materials, the reaction temperature, the reaction time and the pH value and the like, and the morphology structure of the nano ZnO-alumina composite material is regulated and the preparation structure is compact, a regularly ordered nanoclusters structure. By studying the influence of reaction conditions and other factors on the nano-composites, the optimum reaction conditions for preparing nano-ZnO-alumina composites were preliminarily determined, that is, with pH = 10 and reaction temperature of 30 鈩，
本文编号：2271810
[Abstract]:In recent years, the rapid development of nano-technology has had a great influence on the social economic development, scientific and technological progress and human life. The development of large-scale devices from the beginning to the small-sized devices now being paid more attention by society has made great contributions to the nano-technology, and its unique mechanical, magnetic, quantum effect, size effect and high-efficiency catalytic properties provide great convenience for the research in this field. nano-zinc oxide and titanium dioxide occupy an important position in inorganic functional materials, and the research and modification of one-dimensional nano zinc oxide and titanium dioxide nanotube arrays has brought an unprecedented response to the development of the nano-field. This paper mainly focuses on the compounding of nano-zinc oxide and the doping modification of nano-TiO _ 2. The aim is to study the growth speed and morphology of nano-structure by controlling the reaction temperature, the ratio of raw materials and pH value, and to deeply study its optical properties and catalytic performance. The paper also gives a brief overview of the wastewater treatment project during the internship period. According to the requirements of the original factory inlet and outlet water quality index, anaerobic treatment is carried out on the sewage in Fushun, so as to ensure that the residual organic matter and ammonia nitrogen in the sewage can reach the standard. The specific research content is as follows: 1, the water heat-precipitation two-step method prepares the ZnO-alumina composite nano material by adjusting the composition of different raw materials, the reaction temperature, the reaction time and the pH value and the like, and the morphology structure of the nano ZnO-alumina composite material is regulated and the preparation structure is compact, a regularly ordered nanoclusters structure. By studying the influence of reaction conditions and other factors on the nano-composites, the optimum reaction conditions for preparing nano-ZnO-alumina composites were preliminarily determined, that is, with pH = 10 and reaction temperature of 30 鈩，
本文编号：2271810
本文链接：https://www.wllwen.com/kejilunwen/cailiaohuaxuelunwen/2271810.html
