ZnO-AgCl納米復合材料以及鉬系摻雜二氧化鈦納米管陣列的性能研究
發(fā)布時間：2018-10-15 07:33
【摘要】：近幾年來,納米科技的迅速發(fā)展,已經(jīng)對社會的經(jīng)濟發(fā)展、科技進步以及人類生活等方面產(chǎn)生了巨大影響。從一開始的大型器件發(fā)展到如今被社會更加重視的小型器件,納米科技作出了重大的貢獻,它獨特的力學、磁學、量子效應、尺寸效應以及高效的催化特性,都為這方面的研究提供了很大的便利。納米氧化鋅、二氧化鈦在無機功能材料中占據(jù)著重要的地位,而一維納米氧化鋅、二氧化鈦納米管陣列的研究及改性給納米領域的發(fā)展帶來了空前的反響。本論文將研究重點主要放在納米氧化鋅的復合以及納米二氧化鈦的摻雜改性,目的是通過控制反應溫度、原料比例、pH值等研究納米微觀結構生長速度及形貌,并對其光學性能及催化性能進行深入研究。本論文還對實習期間所做的順酐污水處理項目進行了簡要概述,根據(jù)原廠進、出水水質指標的要求,對順酐污水進行厭氧處理,保證污水中殘余的有機物和氨氮能夠達標排放。具體研究內容如下：一、水熱-沉淀兩步法制備ZnO-AgCl復合納米材料通過調整不同原料組成、反應溫度、反應時間以及pH值等方式,對納米ZnO-AgCl復合材料的形貌結構進行調控,制備結構緊密、規(guī)則有序的納米簇結構。通過研究反應條件等因素對納米復合材料的影響,并對其進行機理分析,初步確定了制備納米ZnO-AgCl復合材料的最佳反應條件,即以pH=10、反應溫度為30℃的條件下,以1：1的比例將0.1 mol/LC(NH4Cl)和AgCl(含量為20wt%)在避光的條件下進行反應2h,制得的ZnO-AgCl納米簇形貌最佳。二、陽極氧化法制備Mo摻雜納米二氧化鈦無機功能材料本章著重研究摻雜Mo之后對二氧化鈦納米管陣列的影響,然而摻雜量、外加電壓、pH值以及氧化時問成為主要研究影響因素,通過對以上因素進行控制調節(jié),可制備出形貌可控、排列規(guī)則有序的納米管陣列。在此基礎上,設計正交試驗方案,初步確定最佳反應條件,即最佳鉬含量為1.0wt%,通入外加電壓為40V的直流電源,設定pH值為6在醇水溶劑中氧化4h,即得形貌性質最佳的納米二氧化鈦改性材料。對制備樣品進行光催化性能測試表征分析,摻雜Mo后TiO2納米材料的光催化性能明顯優(yōu)于單一的TiO2納米材料。通過分析樣品的U-V吸收光譜,Mo摻雜后制備的樣品發(fā)生吸收邊紅移現(xiàn)象并且在可見光區(qū)范圍有強的吸收�？梢员砻�,Mo摻雜TiO2樣品在可見光下會有較高的光催化活性。三、厭氧工藝處理順酐污水方案本項目污水種類多、污染物濃度高、成分復雜,進水COD≤20000mg/L。針對此類污水,首先采用“調節(jié)池+溶氣氣浮”工藝對原水進行預處理,降低出水油含量,減少由于水量和水質的波動對生化部分的沖擊,利用水解酸化池對原水進行預算化,將大分子難降解有機物分解為小分子易降解有機物,然后采用我公司自主研發(fā)的專利設備“LIC雙循環(huán)厭氧反應器”去除廢水中絕大多數(shù)有機物質,避免高濃度廢水對后續(xù)生化系統(tǒng)造成不良影響,再采用“A/O工藝+二沉池”對污水進一步處理,去除污水中殘余的有機物和氨氮之后達標排放。
[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，
本文編號：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，
本文編號：2271810
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