本文選題：BiOX + 花狀微球��； 參考：《山東大學(xué)》2015年碩士論文

【摘要】：環(huán)境污染和能源危機(jī)是當(dāng)前世界面臨的兩大難題,半導(dǎo)體可見(jiàn)光催化技術(shù)被認(rèn)為是解決這兩大難題的最具應(yīng)用前景的技術(shù)之一,因其可有效降解有害污染物,以治理環(huán)境污染,同時(shí)可光解水制氫、還原二氧化碳制碳?xì)淙剂系?以緩解能源危機(jī)。傳統(tǒng)的半導(dǎo)體材料如TiO2,因可見(jiàn)光能利用率低而限制了其利用,研發(fā)可見(jiàn)光響應(yīng)的半導(dǎo)體光催化劑己成為目前的研究重點(diǎn)之一。BiOX (X=Cl Br、I)是一類(lèi)具有較高可見(jiàn)光催化效率的鉍系材料,受到人們關(guān)注；通過(guò)調(diào)控其形貌,以增強(qiáng)其光催化活性,是目前研究的熱點(diǎn)之一。我國(guó)鉍資源儲(chǔ)量豐富,開(kāi)發(fā)鉍系可見(jiàn)光催化劑具有重要的現(xiàn)實(shí)意義。本文就鹵氧化鉍多級(jí)結(jié)構(gòu)的制備及其可見(jiàn)光催化性能進(jìn)行了研究,以期為鉍系可見(jiàn)光催化劑的研發(fā)提供依據(jù)。本論文主要研究?jī)?nèi)容及結(jié)論如下：(1)以四丁基碘化銨為碘源和模板,采用水熱法合成了BiOI花狀微球,考察了水熱溫度和時(shí)間對(duì)BiOI微球晶型和形貌的影響；采用X射線衍射(XRD)、掃描電鏡(SEM)、透射電鏡(TEM)、氮?dú)馕矫摳健⒆贤?可見(jiàn)漫反射光譜等技術(shù)對(duì)樣品進(jìn)行了表征；考察了樣品在可見(jiàn)光下對(duì)羅丹明B (RhB)降解的催化活性,發(fā)現(xiàn)160℃水熱30 h所制備樣品的催化效率最高,比BiOI納米片高4倍多,表明形貌對(duì)其催化活性有重要影響。提出了“形貌因子”(比表面積與納米片厚度的比值)參數(shù),發(fā)現(xiàn)其光催化效率隨“形貌因子”增大而增大。另外,BiOI花狀微球具有良好的化學(xué)穩(wěn)定性和可重復(fù)利用性。(2)以次水楊酸鉍為鉍源和模板,采用水熱法合成了BiOX (X=Cl、Br和I)納米帶,并采用XRD、XPS、SEM、TEM、氮?dú)馕矫摳健⒆贤?可見(jiàn)漫反射光譜和熒光光譜等技術(shù)進(jìn)行了表征,考察了樣品在可見(jiàn)光下對(duì)羅丹明B(RhB)降解的催化活性。結(jié)果表明,所制備的BiOX納米帶由高度暴露(010)面的不規(guī)則單晶納米顆粒所組成,其光催化效率遠(yuǎn)高于高度暴露(001)面的BiOX納米片。BiOX納米帶的高光催化活性,緣于其高比表面積和較強(qiáng)的可見(jiàn)光吸收能力。
[Abstract]:Environmental pollution and energy crisis are two major problems facing the world. Semiconductor visible light catalytic technology is considered to be one of the most promising technologies to solve these two problems, because it can effectively degrade harmful pollutants in order to control environmental pollution. At the same time, water can be photolysis to produce hydrogen, carbon dioxide to reduce hydrocarbon fuel, etc. to alleviate the energy crisis. Traditional semiconductor materials, such as TiO2, are limited in their utilization due to the low utilization of visible light energy. The development of visible light-responsive semiconductor photocatalysts has become one of the focuses of current research. BiOX (XCL-Br-I) is a kind of bismuth system materials with high visible light efficiency. In order to enhance its photocatalytic activity, it is one of the hotspots in recent years to control its morphology and enhance its photocatalytic activity. There are abundant reserves of bismuth in China, so it is of great practical significance to develop bismuth system visible light catalyst. In this paper, the preparation of bismuth halide multistage structure and its visible light catalytic properties were studied in order to provide the basis for the research and development of bismuth system visible light catalyst. The main contents and conclusions of this thesis are as follows: (1) BiOI flower-like microspheres were synthesized by hydrothermal method using four Ding Ji ammonium iodide as iodine source and template. The effects of hydrothermal temperature and time on the morphology and morphology of BiOI microspheres were investigated. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption and desorption, UV-Vis diffuse reflectance spectroscopy, and the catalytic activity of the samples for Rhodamine B (RhB) degradation under visible light was investigated. It is found that the catalytic efficiency of the samples prepared at 160 鈩，

本文編號(hào)：2115500