Layer-by-Layer Assembly of TaO3 Nanosheet/Polycation Composite Nanostructures: Multilayer Film, Hollow Sphere, and Its Photocatalytic Activity for Hydrogen Evolution
Layer-by-Layer Assembly of TaO3 Nanosheet/Polycation Composite Nanostructures: Multilayer Film, Hollow Sphere, and Its Photocatalytic Activity for Hydrogen Evolution
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DOI：
10.1021/cm903733s
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发表时间：
2010-03
影响因子：
8.6
通讯作者：
Jianhua Huang;R. Ma;Y. Ebina;K. Fukuda;K. Takada;T. Sasaki
中科院分区：
文献类型：
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作者：
Jianhua Huang;R. Ma;Y. Ebina;K. Fukuda;K. Takada;T. Sasaki
通过逐层顺序吸附法制备了TaO 3纳米片微晶与聚二甲基二烯丙基氯化铵（PDDA）的多层复合膜。将所得膜暴露于UV光促进纳米片廊中的PDDA的光催化分解以产生无机膜。通过在聚苯乙烯（PS）微球上沉积PDDA/TaO 3多层纳米壳层，然后煅烧除去PS核和PDDA层，制备了新型Ta 2 O 5空心微球。空心微球显示出有效的光催化性能从甲醇水溶液中析氢。形状控制成空心微球后，光催化活性大大提高。结果突出了催化剂的表面积和结晶度在光催化活性中的作用。
Multilayer composite films comprising of TaO3 nanosheet crystallites and poly(diallyldimethylammonium chloride) (PDDA) were assembled via layer-by-layer sequential adsorption. Exposure of the resulting films to UV light promoted photocatalytic decomposition of PDDA in the nanosheet gallery to yield inorganic films. Novel hollow microspheres of Ta2O5 were fabricated by the deposition of a PDDA/TaO3 multilayer nanoshell on polystyrene (PS) beads and the subsequent removal of the PS core and PDDA layers via calcination. The hollow microspheres showed photocatalytic properties effective for hydrogen evolution from an aqueous methanol solution. The shape control into hollow microsphere greatly enhanced the photocatalytic activity. The results highlight the role of the surface area and crystallinity of the catalyst in photocatalytic activity.