Synthesis of SBA-15/Ni/TiO2/CNTs composites and their photocatalytic activities

doi:10.3969/j.issn.0438-1157.2014.09.057

Abstract

Abstract: SBA-15/NiO/TiO₂ nanocomposites were prepared by coating nano-TiO₂ doped with nickel on SBA-15 support using the sol-gel method. Then carbon nanotubes (CNTs) were grown by in-situ chemical vapor deposition (CVD) on the surface of the SBA-15/NiO/TiO₂ with metallic nickel reduced in TiO₂ as catalyst. The prepared SBA-15/Ni/TiO₂/CNTs nanocomposite photocatalysts were characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, UV-Vis absorption spectroscope and Raman spectra. The photocatalytic activities of the samples were investigated by the photocatalytic degradation of methylene blue. The photocatalytic activities of SBA-15/Ni/TiO₂/CNTs increased significantly in comparison with SBA-15/NiO/TiO₂. The photocatalytic activities of the nanocomposite by twice coating with TiO₂ doped with nickel on SBA-15 was also higher than once coating.

Key words: SBA-15, TiO₂, CNTs, photocatalysis

摘要： 通过溶胶凝胶法，经多次涂覆在SBA-15上负载掺杂镍的纳米TiO₂，得到SBA-15/NiO/TiO₂复合物；再以TiO₂中还原态金属镍为催化剂，通过化学气相沉积法（CVD），在SBA-15/NiO/TiO₂表面原位生长碳纳米管，制得SBA-15/Ni/TiO₂/CNTs复合材料。通过XRD、SEM、TEM、UV-Vis和Raman等方法考察了SBA-15/Ni/TiO₂/CNTs复合材料的结构和性能，并通过降解亚甲基蓝溶液评价其光催化活性。结果表明，SBA-15/Ni/TiO₂/CNTs复合光催化剂的催化活性较SBA-15/NiO/TiO₂显著提高。二次涂覆掺杂镍的二氧化钛制得的复合光催化剂的催化活性高于一次涂覆。

关键词: SBA-15, TiO₂, 碳纳米管, 光催化

CLC Number:

TB383

SUN Xiuli, CHEN Aiping, LÜ Hui, HE Hongbo, HE Tiantian, LIN Qizhi, LI Chunzhong. Synthesis of SBA-15/Ni/TiO₂/CNTs composites and their photocatalytic activities[J]. CIESC Journal, 2014, 65(9): 3718-3723.

孙秀丽, 陈爱平, 吕慧, 何洪波, 何田田, 林启志, 李春忠. SBA-15/Ni/TiO₂/CNTs复合材料的制备及其光催化性能[J]. 化工学报, 2014, 65(9): 3718-3723.

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Synthesis of SBA-15/Ni/TiO₂/CNTs composites and their photocatalytic activities

SBA-15/Ni/TiO₂/CNTs复合材料的制备及其光催化性能

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