水熱法制備銅鋅錫硫及其性能的研究
發(fā)布時(shí)間：2018-07-13 18:55
【摘要】：伴隨著工業(yè)的繁榮發(fā)展,各種環(huán)境問題以及能源危機(jī)現(xiàn)實(shí)都擺在人們的面前,這迫切需要探索工業(yè)、環(huán)境、能源之間的可持續(xù)發(fā)展模式。作為一種妥善解決環(huán)境污染問題的途徑,半導(dǎo)體光催化技術(shù)能夠利用清潔無污染、取之不盡的太陽能,在較為溫和的條件下,將廢水中的有機(jī)污染物徹底分解。這種技術(shù)避免了對(duì)環(huán)境造成次生災(zāi)害,同時(shí)光催化技術(shù)具有綠色、低成本等優(yōu)點(diǎn),所以逐漸受到工業(yè)發(fā)展的重視。由于光伏材料的最佳禁帶寬度與化合物Cu2ZnSnS4(CZTS)的固有禁帶寬度非常相似,并具有較大的吸收系數(shù),另外其組成元素豐富、無毒,因而在薄膜太陽能電池吸收層領(lǐng)域、光催化反應(yīng)領(lǐng)域都有著廣闊的應(yīng)用前景。本課題從CZTS化合物的制備合成與性能特點(diǎn)等方面進(jìn)行探究。主要工作如下:(1)CZTS粉末的制備與表征。采用水熱法,選取PVP作為制備過程的表面活性劑,從CN2H4S(硫脲)、CuCl2、ZnCl2、SnCl4四種原料中合成提取CZTS粉末,同時(shí)觀察反應(yīng)條件中溫度和PVP含量對(duì)CZTS產(chǎn)物外觀和結(jié)構(gòu)的影響。借助于XRD、SEM、EDS及UV-Vis等途徑來對(duì)CZTS進(jìn)行質(zhì)量及微觀結(jié)構(gòu)上的表征。從結(jié)果中發(fā)現(xiàn):具有良好結(jié)晶性的CZTS粉末,呈現(xiàn)出鋅黃錫礦結(jié)構(gòu)時(shí)能較好的響應(yīng)可見光,它的光學(xué)帶隙是1.49 eV。(2)CZTS粉末光催化性能的研究。模擬廢水處理過程,采用羅丹明B溶液為目標(biāo)對(duì)象,在可見光照射環(huán)境下測(cè)試CZTS粉末的光催化特性。數(shù)據(jù)顯示:CZTS在可見光環(huán)境中有很好的催化特性,5小時(shí)催化反應(yīng)時(shí)間下,羅丹明溶液中RhB的降解率高達(dá)70.75%。(3)CZTS薄膜的制備及其光電性能實(shí)驗(yàn)研究。采用水熱法在FTO玻璃襯底上沉積CZTS薄膜,之后對(duì)樣品進(jìn)行物相鑒定、形貌分析及線性I-V曲線的測(cè)試。結(jié)果表明CZTS薄膜是由均勻且致密的球體狀粒子所組成,薄膜的禁帶寬度為1.51 e V,在光照的條件比在黑暗條件下展現(xiàn)出更低的電阻率。
[Abstract]:With the prosperity and development of industry, all kinds of environmental problems and energy crisis are facing people. It is urgent to explore the sustainable development model between industry, environment and energy. As a way to solve the problem of environmental pollution, semiconductor photocatalytic technology can make use of clean and unpolluted and inexhaustible solar energy. Under mild conditions, the organic pollutants in the wastewater are thoroughly decomposed. This technology avoids the secondary disasters to the environment, has the advantages of green and low cost with time catalysis technology, so it is gradually paid attention to industrial development. Due to the best band gap of photovoltaic materials and the inherent forbidden bandwidth of compound Cu2ZnSnS4 (CZTS) The degree is very similar and has a large absorption coefficient, and the other components are rich and non-toxic. Therefore, in the field of absorption layer of thin film solar cells, the field of photocatalytic reaction has a broad application prospect. This topic is explored from the preparation and properties of CZTS compounds and properties. The main work is as follows: (1) preparation of (1) CZTS powder By using hydrothermal method, PVP was selected as the surface active agent in the preparation process, and CZTS powder was synthesized from four kinds of raw materials, CN2H4S (thiourea), CuCl2, ZnCl2, SnCl4, and the effect of temperature and PVP content on the appearance and structure of CZTS products in the reaction conditions. The quality and microcosmic were carried out by means of XRD, SEM, EDS and UV-Vis. Structural characterization. It is found from the results that good crystalline CZTS powder can respond to visible light in a zinc yellow tin structure, and its optical band gap is a study of the photocatalytic performance of 1.49 eV. (2) CZTS powder. The simulated wastewater treatment process is targeted by Luo Danming B solution, and CZTS is tested under visible light irradiation environment. The photocatalytic properties of the powder show that CZTS has good catalytic properties in the visible light environment. In the 5 hour catalytic reaction time, the degradation rate of RhB in Luo Danming solution is up to the preparation of 70.75%. (3) CZTS film and the experimental study of its photoelectric properties. The CZTS film is deposited on the FTO glass substrate by hydrothermal method. The results show that the CZTS thin film is composed of uniform and compact spheroid particles, and the band gap of the film is 1.51 e V, and the light condition shows a lower resistivity than in the dark condition.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X703;O643.36
[Abstract]:With the prosperity and development of industry, all kinds of environmental problems and energy crisis are facing people. It is urgent to explore the sustainable development model between industry, environment and energy. As a way to solve the problem of environmental pollution, semiconductor photocatalytic technology can make use of clean and unpolluted and inexhaustible solar energy. Under mild conditions, the organic pollutants in the wastewater are thoroughly decomposed. This technology avoids the secondary disasters to the environment, has the advantages of green and low cost with time catalysis technology, so it is gradually paid attention to industrial development. Due to the best band gap of photovoltaic materials and the inherent forbidden bandwidth of compound Cu2ZnSnS4 (CZTS) The degree is very similar and has a large absorption coefficient, and the other components are rich and non-toxic. Therefore, in the field of absorption layer of thin film solar cells, the field of photocatalytic reaction has a broad application prospect. This topic is explored from the preparation and properties of CZTS compounds and properties. The main work is as follows: (1) preparation of (1) CZTS powder By using hydrothermal method, PVP was selected as the surface active agent in the preparation process, and CZTS powder was synthesized from four kinds of raw materials, CN2H4S (thiourea), CuCl2, ZnCl2, SnCl4, and the effect of temperature and PVP content on the appearance and structure of CZTS products in the reaction conditions. The quality and microcosmic were carried out by means of XRD, SEM, EDS and UV-Vis. Structural characterization. It is found from the results that good crystalline CZTS powder can respond to visible light in a zinc yellow tin structure, and its optical band gap is a study of the photocatalytic performance of 1.49 eV. (2) CZTS powder. The simulated wastewater treatment process is targeted by Luo Danming B solution, and CZTS is tested under visible light irradiation environment. The photocatalytic properties of the powder show that CZTS has good catalytic properties in the visible light environment. In the 5 hour catalytic reaction time, the degradation rate of RhB in Luo Danming solution is up to the preparation of 70.75%. (3) CZTS film and the experimental study of its photoelectric properties. The CZTS film is deposited on the FTO glass substrate by hydrothermal method. The results show that the CZTS thin film is composed of uniform and compact spheroid particles, and the band gap of the film is 1.51 e V, and the light condition shows a lower resistivity than in the dark condition.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X703;O643.36
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