不同基底对FeOOH-TiO_2复合膜光催化性能的影响
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摘要
应用分子自组装法,以外侧官能团为巯基(-SH)的自组装单层为模板,在TiCl_4-HCl、Fe(NO_3)_3-HNO_3液相反应体系中,分别在活性炭(AC)和石英玻璃片基底上负载了FeOOH-TiO_2纳米复合膜。利用透射电子显微镜(TEM)、扫描电子显微镜(SEM)等技术手段对实验样品进行测试表征。研究分析复合材料对甲基橙溶液的吸附及光催化性能。研究结果表明不同基材表面FeOOH晶型为针铁矿,TiO_2晶型为锐钛矿。虽然晶型相同,但是二者显微形貌有所区别,且FeOOH/TiO_2/AC材料的吸附性能及光催化性能明显高于石英基FeOOH-TiO_2复合膜性能。根据实验结果分析认为基材性质的不同是造成表面形貌、微结构、吸附性能以及光催化活性差异的主要原因。
Through the molecular self-assembly method, the SAMs whose outer functional group is-SH were adopted as the template for loading the FeOOH-TiO_2 nano-composite respectively on AC and quartz glass substrates in aqueous systems of TiCl_4-HCl, Fe(NO_3)_3-HNO_3. The samples were characterized by TEM and SEM. The adsorption and photocatalytic degradation of methyl orange solution by FeOOH-TiO_2 composite film were analyzed. Results indicate that the crystal form of FeOOH is goethite and the crystal form of TiO_2 is anatase. Although the crystal forms are the same, their microstructures are quite different. The adsorption and photocatalytic degradation properties of FeOOH/TiO_2/AC are significantly higher than those of quartz based FeOOH-TiO_2 materials. Due to these experimental results, it can be considered that the property differences of substrates mainly cause the divergence in surface morphology,adsorption properties and photocatalytic activity.
Through the molecular self-assembly method, the SAMs whose outer functional group is-SH were adopted as the template for loading the FeOOH-TiO_2 nano-composite respectively on AC and quartz glass substrates in aqueous systems of TiCl_4-HCl, Fe(NO_3)_3-HNO_3. The samples were characterized by TEM and SEM. The adsorption and photocatalytic degradation of methyl orange solution by FeOOH-TiO_2 composite film were analyzed. Results indicate that the crystal form of FeOOH is goethite and the crystal form of TiO_2 is anatase. Although the crystal forms are the same, their microstructures are quite different. The adsorption and photocatalytic degradation properties of FeOOH/TiO_2/AC are significantly higher than those of quartz based FeOOH-TiO_2 materials. Due to these experimental results, it can be considered that the property differences of substrates mainly cause the divergence in surface morphology,adsorption properties and photocatalytic activity.
引文
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[20] 姚青倩,许瑞梅,赵文霞.电镜能谱仪中过渡金属元素的化学价态分析[J].电子显微学报,2016,35(3):212-216.
[21] SUN Z, HE X, DU J, et al. Synergistic effect of photocatalysis and adsorption of nano-TiO2 self-assembled onto sulfanyl/activated carbon composite[J]. Environmental Science & Pollution Research International,2016, 23(21):1-8.
[2] 李金华,孔雅玲,惠增哲,等.铈掺杂TiO2多孔材料的制备及光催化性能[J]. 化学研究,2017,28(6):691-694.
[3] 卢月洁,王鑫,毕先均. 微波超声强化银掺杂TiO2催化剂光催化活性的研究[J]. 化学研究,2016,27(6):748-755.
[4] 苏广慧,陈龙,崔佳萌,等. CuAl(1.6)Fe(0.4)O4/凹凸棒石复合材料的制备及可见光催化性能研究[J].电子显微学报,2014,33(3):204-208.
[5] 李西营, 齐亚辉, 李明杰,等. α-Fe2O3的制备及α-Fe2O3@SiO2复合纳米材料的吸附性能[J].化学研究, 2016, 27(4):470-475.
[6] XU Z, ZHANG M, WU J, et al. Visible light-degradation of azo dye methyl orange using TiO2/β-FeOOH as a heterogeneous photo-Fenton-like catalyst.[J]. Water Science & Technology A Journal of the International Association on Water Pollution Research, 2013, 68(10):2178-2185.
[7] RAWAL S B,CHAKRABORTY A K,WAN I L. FeOOH/TiO2 heterojunction for visible light photocatalyst heterojunction of FeOOH and TiO2 for the formation of visible light photocatalyst[J]. Bulletin of the Korean Chemical Society, 2009, 30(11):2613-2616.
[8] CHEN D, HU S, LI G. Preparation and photocatalytic activity of TiO2/FeOOH nanocomposite[J]. Advanced Materials Research, 2012, 535-537:219-222.
[9] 陈崧哲,张彭义,祝万鹏,等. 不同基材上TiO2膜的表征和光催化活性评价[J]. 催化学报, 2004, 25(8):641-647.
[10] 任学昌,史载锋,孔令仁. 纳米TiO2薄膜在不同基质表面的负载及光催化性能[J]. 中国环境科学, 2005, 25(5):535-539.
[11] 杨宁宁,雅菁,胡凤娇,等. 不同基底对TiO2和SiO2薄膜的光学性能的影响[J]. 无机化学学报,2015,31(7):1315-1320.
[12] 谢裕兴,孙振亚,李涵,等. 石英基多层纳米TiO2-FeOOH复合材料的制备和显微结构的表征[J]. 电子显微学报,2017, 36(3):207-213.
[13] 周道坤,孙振亚,何小军,等. 复合顺序对三维花状TiO2-FeOOH复合材料吸附及光催化性能的影响[J]. 化工环保,2017, 37(3):304-308.
[14] 周尧, 孙振亚. 氧化硅基FeOOH/TiO2纳米复合膜的自组装制备与表征[J]. 武汉理工大学学报,2013,35(7):16-20.
[15] 王双,郭世赣,林长青,等. Ag/AgCl/GO可见光催化剂的制备及其性能[J]. 化学研究,2016,27(3):323-326.
[16] 康宏平,孙振亚,刘建永,等. Ag+-TiO2/AC复合材料的可见光吸附-光催化协同作用[J]. 环境工程学报,2015,9(4):1620-1624.
[17] XIANG Q, YU J. Photocatalytic activity of hierarchical flower-like TiO2, superstructures with dominant {001} facets[J]. Chinese Journal of Catalysis,2011,32(3/4):525-531.
[18] 钱柏太,沈自求. 控制表面氧化法制备超疏水CuO纳米花膜[J]. 无机材料学报,2006, 21(3):747-752.
[19] 吴诗嫣,裴静远,孟杰,等.室温合成BaTiO3纳米晶的生长机制研究[J].电子显微学报,2018,37(2):110-115.
[20] 姚青倩,许瑞梅,赵文霞.电镜能谱仪中过渡金属元素的化学价态分析[J].电子显微学报,2016,35(3):212-216.
[21] SUN Z, HE X, DU J, et al. Synergistic effect of photocatalysis and adsorption of nano-TiO2 self-assembled onto sulfanyl/activated carbon composite[J]. Environmental Science & Pollution Research International,2016, 23(21):1-8.