本文選題：CS/Ag_3PO_4 + C_(60)/Ag_3PO_4��； 參考：《天津科技大學(xué)》2017年碩士論文

【摘要】：環(huán)境問題是人們對工業(yè)發(fā)展的負(fù)面影響沒有及時控制而引起的世界性重要難題。環(huán)境質(zhì)量的下降會嚴(yán)重的影響人類和生態(tài)系統(tǒng)的正�；顒印Ｒ虼巳祟惣毙枰芯恳环N高效環(huán)保材料來緩解和預(yù)防這種由于工業(yè)發(fā)展引起的環(huán)境問題。眾所周知,半導(dǎo)體光催化技術(shù)是通過太陽能照射半導(dǎo)體所產(chǎn)生的光生載流子把污染物氧化還原為對環(huán)境沒有污染的二氧化碳和水。許多碳納米材料本身具有超強(qiáng)吸附、穩(wěn)定性、耐腐蝕以及很難發(fā)生化學(xué)反應(yīng)等優(yōu)點(diǎn)。本文圍繞含碳材料復(fù)合Ag_3PO_4以及鹵氧化鉍系列復(fù)合后的光催化劑模擬降解工業(yè)污水的性能進(jìn)行了以下研究。通過簡單的沉淀法制備了含碳材料的復(fù)合光催化劑CS/Ag_3PO_4,采用X射線衍射儀(XRD),X射線光電子能譜(XPS),透射電子顯微鏡(TEM),紫外-可見分光光度儀(UV-Vis),掃描電子顯微鏡(SEM)等對上述合成的含碳材料的光催化劑的表面構(gòu)成和光學(xué)性能等進(jìn)行了表征。以具有偶氮染料結(jié)構(gòu)的甲基橙(MO)作為目標(biāo)染料,對Ag_3PO_4和CS/Ag_3PO_4的光催化活性進(jìn)行了分析與評價,并探究了不同含量的碳材料對CS/Ag_3PO_4復(fù)合光催化劑催化降解模擬污水效率的影響。研究可知,在制備復(fù)合催化劑的過程中將CS的含量控制在5 mg/L時,才能制備出降解活性最優(yōu)的復(fù)合催化劑CS/Ag_3PO_4。CS/Ag_3PO_4復(fù)合光催化劑在降解染料過程中的可能機(jī)理是CS把Ag_3PO_4導(dǎo)帶上的光生電子儲存起來,這樣避免了光生電子與光生空穴的重合,從而使CS/Ag_3PO_4的光催化活性能夠有效的提高。在降解MO染料過程中,檢測出羥基自由基(·OH)發(fā)揮了主要的降解活性的作用。通過沉淀法制備了 Ag_3PO_4和C_(60)/Ag_3PO_4復(fù)合光催化劑,用XRD,TEM,UV-Vis等對制備的含碳光催化劑的光學(xué)性質(zhì)和表面結(jié)構(gòu)進(jìn)行了表征,同樣以偶氮類染料甲基橙MO作為目標(biāo)反應(yīng)物,系統(tǒng)性地評價了 Ag_3PO_4和C_(60)/Ag_3PO_4的光催化降解活性,并檢測了不同含量的富勒烯C_(60)對復(fù)合催化劑的降解效率的影響。實(shí)驗(yàn)結(jié)果表明,當(dāng)復(fù)合催化劑中富勒烯C_(60)的含量約為5 mg/L時,與Ag_3PO_4復(fù)合后的光催化降解性能表現(xiàn)最優(yōu)秀,這是由于富勒烯C_(60)能夠?qū)⒐馍娮觾Υ嫫饋?能夠起到將光生電子-空穴有效分離的作用,從而提高了復(fù)合催化劑的降解效率及循環(huán)穩(wěn)定性。通過簡便的微波輔助法制備了具有高降解效率的復(fù)合材料BiOCl/BiOBr,用XRD,SEM,UV-Vis等對不同摩爾比的BiOCl/BiOBr的光學(xué)性質(zhì)及降解活性進(jìn)行各種對比表征。結(jié)果表明,在模擬可見光條件下BiOCl/BiOBr材料能夠非常好的降解羅丹明B溶液。而BiOCl/BiOBr復(fù)合光催化劑的光催化降解的可能機(jī)理是由于BiOCl/BiOBr能夠比純的BiOCl和BiOBr更好地分離光生電子與空穴,最終提高了該復(fù)合光催化劑的光催化降解效率。
[Abstract]:Environmental problem is an important problem in the world caused by people's negative impact on industrial development without timely control. The decline of environmental quality will seriously affect the normal activities of human and ecosystem. Therefore, we urgently need to study a kind of efficient environmental protection material to alleviate and prevent the environmental problems caused by industrial development. It is well known that semiconductor photocatalytic technology is a photogenerated carrier produced by solar irradiation of semiconductors to redox pollutants into unpolluted carbon dioxide and water. Many carbon nanomaterials have the advantages of super adsorption, stability, corrosion resistance and difficult chemical reaction. In this paper, the photocatalytic degradation of industrial wastewater by the composite of carbon material AgS3PO4 and bismuth halide has been studied as follows. Carbon containing composite photocatalyst CS/ Ag3PO4 was prepared by simple precipitation method. X-ray diffraction (XRD) X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), UV-Vis spectrophotometer (UV-Vis) and scanning electron microscope (SEM) were used to prepare carbon containing composite photocatalyst CS/ Ag3PO4, which were compared with each other by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), UV-Vis and scanning electron microscopy (SEM). The surface composition and optical properties of the photocatalyst were characterized. Using methyl orange (MO) with azo dye structure as the target dye, the photocatalytic activity of AgS3PO4 and CS/ Ag3PO4 was analyzed and evaluated. The effect of carbon materials on the efficiency of CS/ Ag3PO4 photocatalytic degradation of simulated sewage was investigated. The results show that when the content of CS is controlled at 5 mg / L during the preparation of the composite catalyst, The possible mechanism of the CS/ Ag3PO4 composite photocatalyst in the degradation of dyes is that CS stores the photogenerated electrons in the Ag3PO4 lead band, thus avoiding the coincidence between photogenerated electrons and photogenerated holes. Thus, the photocatalytic activity of CS/ Ag3PO4 can be improved effectively. During the degradation of MO dyes, hydroxyl radical (OH) was found to play a major role in the degradation of MO dyes. The composite photocatalysts of AgSh _ 3PO _ 4 and C _ (60) / Ag _ 3PO _ 4 were prepared by precipitation method. The optical properties and surface structure of the prepared photocatalysts were characterized by XRDX TEMX UV-Vis, and the methyl orange MO, an azo dye, was also used as the target reactant. The photocatalytic degradation activity of Ag3PO4 and C60 / Ag-3PO4 was systematically evaluated, and the effects of different contents of fullerene C60 on the degradation efficiency of the composite catalyst were examined. The experimental results show that when the content of fullerene C _ (60) in the composite catalyst is about 5 mg / L, the photocatalytic degradation performance of the composite with Ag3PO4 is the best, because fullerene C _ (60) can store photogenerated electrons. It can effectively separate photogenerated electrons and holes, thus improving the degradation efficiency and cycle stability of the composite catalyst. BiOCl / BiOBr composites with high degradation efficiency were prepared by a simple microwave assisted method. The optical properties and degradation activity of BiOCl / BiOBr with different molar ratios were characterized by XRDX SEMN UV-Vis et al. The results show that BiOCl-BiOBr can degrade Rhodamine B solution very well under simulated visible light. The possible mechanism of photocatalytic degradation of BiOCl / BiOBr composite photocatalyst is that BiOCl / BiOBr can separate photogenerated electrons and holes better than pure BiOCl and BiOBr, and finally improve the photocatalytic degradation efficiency of the composite photocatalyst.
【學(xué)位授予單位】：天津科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O643.36;O644.1

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