本文選題：磷酸鉍 + 薄膜��； 參考：《暨南大學(xué)》2015年碩士論文

【摘要】：光催化降解水中有機(jī)污染物已成為環(huán)境保護(hù)工作中的重點(diǎn)研究課題。近年來,新型的非金屬含氧酸鹽型光催化劑已越來越受人關(guān)注,而磷酸鉍(Bi PO4)因其自身結(jié)構(gòu)的特點(diǎn)而在光催化方面具有巨大的應(yīng)用潛力。光催化目前存在的兩大主要問題分別是光生電子和空穴的高重組率以及反應(yīng)后催化劑和溶液體系難以分離。而光電催化因引入外加偏壓,可有效促使光生電子和空穴的分離和遷移;另一方面,催化劑必須負(fù)載在一定的充當(dāng)電極的基底上,從而在反應(yīng)后能方便地與溶液體系分離。近年來光電催化的相關(guān)報(bào)道越來越多,但系統(tǒng)的研究還比較缺乏,關(guān)于光電催化影響因素的研究還比較少。本文用水熱法合成了Bi PO4粉末,再通過浸漬涂布法在ITO玻璃上制備了Bi PO4薄膜。由SEM、TEM、XRD等方法表征了Bi PO4薄膜的形貌和結(jié)構(gòu),用電化學(xué)阻抗(EIS)、光電流響應(yīng)等方法分析了外加偏壓和光生電子空穴分離和遷移的關(guān)系。通過光催化、電氧化、光電催化降解亞甲基藍(lán)的實(shí)驗(yàn)說明了光電催化對催化降解效果的大幅提高,并考察了p H、電解質(zhì)濃度和種類對光電催化的影響。
[Abstract]:Photocatalytic degradation of organic pollutants in water has become an important research topic in environmental protection. In recent years, new non-metallic oxygenated photocatalysts have attracted more and more attention, while bismuth phosphate bismuth bismuth phosphate (Bi PO 4) has great application potential in photocatalysis because of its own structural characteristics. The two main problems of photocatalysis at present are the high recombination rate of photogenerated electrons and holes and the difficulty of separating the catalyst from the solution system after the reaction. Photocatalysis can effectively promote the separation and migration of photogenerated electrons and holes due to the introduction of applied bias voltage. On the other hand, the catalyst must be supported on a certain substrate to act as the electrode, so that it can be conveniently separated from the solution system after the reaction. In recent years, there are more and more reports on photocatalysis, but the systematic research is still lacking, and the research on the influencing factors of photocatalysis is still rare. In this paper, Bi PO4 powder was synthesized by hydrothermal method and Bi PO4 thin film was prepared on ITO glass by impregnation coating method. The morphology and structure of Bi PO4 thin films were characterized by means of SEMMO-TEMMO-XRD. The relationship between the bias voltage and the hole separation and migration of photogenerated electrons was analyzed by electrochemical impedance spectroscopy (EIS) and photocurrent response. The photocatalytic degradation of methylene blue by photocatalysis, electrooxidation and photocatalysis showed that the photocatalytic degradation of methylene blue was greatly improved, and the effects of pH, electrolyte concentration and type on photocatalytic degradation were investigated.
【學(xué)位授予單位】：暨南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ135.32;TB383.2

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本文編號(hào)：1783073