本文選題：氧化亞錫 + 二氧化錫　； 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：隨著社會的發(fā)展和工業(yè)化進(jìn)程的繼續(xù),能源緊缺和環(huán)境保護(hù)向人類提出了嚴(yán)峻的挑戰(zhàn)。光催化反應(yīng)具有無毒、高效、無二次污染等優(yōu)點(diǎn),是解決能源和環(huán)境問題的一種重要途徑。本論文系統(tǒng)的介紹了目前光催化技術(shù)的基本原理和應(yīng)用,然后詳細(xì)的闡述了氧化亞錫(SnO)、氧化亞錫/二氧化錫(SnO/SnO_2)、聚苯胺/二氧化錫(PANI/SnO_2)三類光催化材料的制備,并采用XRD、SEM、TEM、UV-Vis、XPS、PL以及光催化降解實(shí)驗(yàn)等檢測手段對合成的光催化材料的結(jié)構(gòu)、形貌以及光催化性能、光催化機(jī)理等進(jìn)行了研究。主要研究內(nèi)容如下:1、以SnCl_2·2H_2O和NaOH為原料采用水熱法制備SnO,通過控制溶劑的配比來合成不同形貌的SnO,同時(shí)對不同形貌的SnO進(jìn)行XRD、SEM、TEM等表征和甲基橙(MO)的光催化活性測試。光催化實(shí)驗(yàn)結(jié)果表明花球狀SnO的光催化活性比方片狀SnO的光催化活性高1.5倍。光催化機(jī)理研究表明花球狀SnO光催化性能增強(qiáng)主要原因:花球狀形貌導(dǎo)致入射光子在材料表面多次反射,增加了對光子的吸收。2、以SnCl_2·2H_2O、SnCl_4·5H_2O和氨水為原料采用水熱法,通過對原料的比例控制合成了異質(zhì)結(jié)結(jié)構(gòu)的SnO/SnO_2,改性后光催化活性得到較大的提升。在對MO的光催化活性測試中發(fā)現(xiàn):當(dāng)SnO:SnO_2=1:1時(shí),SnO/SnO_2的光催化活性最佳,在20 min內(nèi)MO降解率達(dá)到99.8%。光催化機(jī)理研究表明異質(zhì)結(jié)結(jié)構(gòu)抑制SnO/SnO_2光生電子空穴對的復(fù)合,顯著地增強(qiáng)了光催化性能。3、以花球狀SnO_2和導(dǎo)電PANI為原料,制備了不同復(fù)合比例的球狀PANI/SnO_2復(fù)合光催化材料。通過對PANI/SnO_2復(fù)合光催化劑進(jìn)行XRD、SEM、TEM、FR等表征和MO的光催化活性測試。光催化實(shí)驗(yàn)表明,PANI能顯著提高SnO_2微球的光催化活性,其光催化降解MO的反應(yīng)符合準(zhǔn)一級動力學(xué)規(guī)律。1%PANI/SnO_2能較好的實(shí)現(xiàn)電子-空穴對的分離,光催化活性最高。PL測試結(jié)果證明,PANI能抑制光生電子空-穴對的復(fù)合,從而提高其光催化性能。
[Abstract]:With the development of society and the process of industrialization, energy shortage and environmental protection have posed severe challenges to human beings. Photocatalytic reaction has the advantages of non-toxicity, high efficiency and no secondary pollution. It is an important way to solve energy and environmental problems. In this paper, the basic principle and application of photocatalytic technology are introduced systematically, and then the preparation of three kinds of photocatalytic materials, tin oxide / SnO / SnO _ 2, Polyaniline / tin dioxide / PANI- / SnO-2, are described in detail. The structure, morphology, photocatalytic properties and photocatalytic mechanism of the synthesized photocatalytic materials were studied by means of XRDX, SEMX, UV-VisTX, XPS PL and photocatalytic degradation experiments. The main contents are as follows: (1) Sno was prepared by hydrothermal method using SnCl_2 2H_2O and NaOH as raw materials. Sno with different morphologies was synthesized by controlling the proportion of solvent. The SnO with different morphologies was characterized by XRDX SEM Tem and the photocatalytic activity of methyl orange moths was tested. The photocatalytic activity of flower spherical SnO was 1.5 times higher than that of flake SnO. The study of photocatalytic mechanism shows that the main reason for the enhancement of photocatalytic performance of spherical SnO is that the spherical morphology of the flower leads to multiple reflection of incident photons on the surface of the material and increases the absorption of photons. The hydrothermal method is used to use SnCl_2 _ 2H _ 2O _ 2SnCl _ 4 5H_2O and ammonia water as raw materials. Sno / SnOs _ 2 with heterojunction structure was synthesized by controlling the proportion of the raw materials, and the photocatalytic activity of the modified Sno / SnO _ s _ 2 was greatly improved. In the photocatalytic activity test of MO, it was found that the photocatalytic activity of Sno / SnO-2 was the best when SnO:SnO_2=1:1 was used, and the degradation rate of MO reached 99.8% within 20 min. The photocatalytic mechanism showed that the heterojunction structure inhibited the photocatalytic properties of SnO/SnO_2 photogenerated electron hole pairs, and significantly enhanced the photocatalytic activity of .3.The spherical PANI/SnO_2 composite photocatalytic materials with different ratios were prepared by using spherical SnO_2 and conductive PANI as raw materials. The PANI/SnO_2 composite photocatalyst was characterized by XRDX SEMX TEMN FR and the photocatalytic activity of MO was tested. The photocatalytic experiments showed that the photocatalytic activity of SnO_2 microspheres was significantly improved by pani. The photocatalytic degradation of MO was in accordance with the quasi-first-order kinetic law. 1 / SnO2 could achieve the separation of electron-hole pairs. The photocatalytic activity of pani was the highest. The results showed that pani could inhibit the combination of photogenerated electron voids and holes and thus improve its photocatalytic performance.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O643.36

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