發(fā)布時(shí)間：2018-05-24 00:53

  本文選題：硅藻土 + 二氧化鈦��； 參考：《北京交通大學(xué)》2017年碩士論文

【摘要】：硅藻土自身是具有天然納米孔徑的重要礦物材料,它具有很好的強(qiáng)吸附性、大的比表面積、高孔隙度等特點(diǎn),并且硅藻土也是一種很好的載體原料。本文采取物理和化學(xué)的方法對(duì)硅藻土進(jìn)行納米Ti02的負(fù)載,研究如何提高納米Ti02/硅藻土復(fù)合材料的光催化性能,制備出具有高催化活性能的光催化材料。以四氯化鈦?zhàn)鳛殁佋?硅藻土作為載體,用水解沉淀法制備納米TiO2/硅藻土光催化材料。利用XRD、SEM、FT-IR、TG等表征方法分析得到不同預(yù)處理方法的硅藻土結(jié)構(gòu)和吸附性能的比較,選出合適的預(yù)處理方法。采取單因素實(shí)驗(yàn)及正交實(shí)驗(yàn)相結(jié)合,從納米Ti02的負(fù)載量、煅燒溫度及鍛燒時(shí)長(zhǎng)三個(gè)因素來(lái)確定制備納米Ti02/硅藻土復(fù)合材料的最佳工藝條件為:納米TiO2負(fù)載量為35%,煅燒溫度為600℃,煅燒時(shí)間為3h。Ti02/硅藻土復(fù)合光催化劑的吸附降解性能研究中,染料降解效率隨著染液初始濃度的增高而降低;染液的降解效率隨著Ti02/硅藻土復(fù)合光催化材料用量的增加也隨之增加;染液的降解效率隨著pH值的增加而逐漸減小。復(fù)合材料對(duì)羅丹明B的去除效果高達(dá)96.77%。利用硅藻土等材料制備成厚度為5毫米的硅藻土板材,并用此板分別與壁紙和壁布進(jìn)行復(fù)合,測(cè)試并分析三種板材其對(duì)甲醛、甲苯的凈化效率和持久性。
[Abstract]:Diatomite itself is an important mineral material with natural nano-pore size, which has good strong adsorption, large specific surface area, high porosity and so on. Diatomite is also a good carrier raw material. In this paper, Ti02 nanoparticles were loaded on diatomite by physical and chemical methods, and how to improve the photocatalytic properties of nano-diatomite composites was studied, and the photocatalytic materials with high catalytic activity were prepared. Nanometer TiO2/ diatomite photocatalytic material was prepared by hydrolysis precipitation method with titanium tetrachloride as titanium source and diatomite as carrier. The structure and adsorption properties of diatomite with different pretreatment methods were analyzed by XRDX SEMT-IRTG and the suitable pretreatment methods were selected. Using single factor experiment and orthogonal experiment, the loading amount of nanometer Ti02 was obtained. Three factors, calcination temperature and calcination time, were used to determine the optimum technological conditions for the preparation of nanosized Ti02/ diatomite composites: the loading amount of nanometer TiO2 was 35, and the calcining temperature was 600 鈩，

本文編號(hào)：1927061