本文選題：水熱法 + 介孔TiO2　； 參考：《大連工業(yè)大學(xué)》2015年碩士論文

【摘要】：隨著環(huán)境污染的日益加劇,提高治理污染的手段變得尤為重要。有機污染及重金屬污染是當(dāng)前水環(huán)境污染治理中極其需要解決的兩大難題。納米介孔TiO2材料具有比表面積大、無毒、無害、無二次污染等特點,對二氧化鈦基納米材料進行改性并進行相關(guān)光催化及重金屬吸附性能考察是近年來水處理催化領(lǐng)域的重點研究方向之一。本論文重點研究如下內(nèi)容:1、以TBOT為鈦源,P123為模板劑,通過水熱法制備了介孔TiO2樣品。利用XRD、TEM、N2吸附-脫附及BET分析、FT-IR分析、熱重-失重分析等手段探討了不同合成條件對樣品晶型、性質(zhì)、形貌、光催化性能的影響,并確定最佳合成條件:A液中乙醇添加量為60mL,P123添加量為2g,水熱溫度60℃,pH=4,煅燒溫度為500℃。最佳制備條件下樣品介孔TiO2樣品為銳鈦礦相,平均粒徑在10nm左右,具有不規(guī)則、蠕蟲狀介孔結(jié)構(gòu),在模擬太陽光下對10mg/L甲基橙溶液光反應(yīng)120min后,染料降解率為73.0%。2、利用浸漬法制備了雙硫腙摻雜的介孔TiO2樣品,探討了不同合成條件對樣品性質(zhì)、形貌、光催化、重金屬Cd吸附性能等的影響,確定了樣品吸附重金屬溶液Cd的最佳制備條件:pH=5、水浴溫度60℃、雙硫腙與介孔TiO2質(zhì)量比為0.1。最佳制備條件下雙硫腙摻雜的介孔TiO2樣品粒徑較均勻,粒徑在20nm左右,摻雜雙硫腙介孔TiO2樣品的最佳Cd吸附效果達(dá)到98.3%,而介孔TiO2僅為18.2%。在模擬太陽光下對10mg/L甲基橙溶液光反應(yīng)120min后,最佳染料降解率為91.3%,相對純介孔二氧化鈦樣品的73.0%降解率有了顯著提高。說明摻雜樣品的吸附性能、光催化性能均比較理想。
[Abstract]:As environmental pollution intensifies day by day, it becomes more and more important to improve the means of pollution control. Organic pollution and heavy metal pollution are the two most difficult problems in water pollution control. Nanometer mesoporous TiO2 materials have the characteristics of large specific surface area, non-toxic, harmless, no secondary pollution and so on. In recent years, it is one of the important research directions in the field of water treatment catalysis to modify titanium-based nanomaterials and investigate their photocatalytic and heavy metal adsorption properties. In this thesis, the mesoporous TiO2 samples were prepared by hydrothermal method with Tbot as the templating agent. The effects of different synthesis conditions on the crystal form, properties, morphology and photocatalytic properties of the samples were investigated by means of XRDX TEMN 2 adsorption desorption, BET FT-IR analysis and thermogravimetric analysis. The optimum synthesis conditions were determined as follows: the amount of ethanol added in the solution of: a was 60 mL / L P123 was 2 g, the hydrothermal temperature was 60 鈩，

本文編號：2069188