Ni-CH 3 CH 2 NH 2 /H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 复合层状钙钛矿的合

发布时间：2021-10-24 03:49

　　自从分解水产氢被首次报道以来,许多光催化剂被开发出来并用于光催化分解水产氢.然而,由于光生电子和空穴的复合率普遍较高,大部分的光催化剂分解水产氢效率都很低.因此,开发新型高效的光催化材料至关重要.具有（Bi₂O₂）²⁺(A_m-1M_mO_3m+1)^2-通式的Aurivillius相层状钙钛矿材料因具有独特的层状结构、元素可调性以及优异的电荷传输和分离能力而广泛应用于光催化分解水和去除有机污染物.此外,当该类层状钙钛矿被剥离成超薄纳米片时,其光催化性能进一步提高.为了进一步提高层状钙钛矿的载流子分离能力,将客体（如贵金属,半导体等）通过化学反应的途径插入到层状钙钛矿的层间区域,从而合成出复合层状钙钛矿被广泛发展和应用.然而,引入的客体主要是贵金属和半导体,这类客体的高成本和不均匀分布制约了其进一步的应用.由于廉价、无毒和稳定等优点,镍基材料如Ni,NiO,Ni₂O₃,NiS,NiS₂

【文章来源】：催化学报. 2017,38(12)北大核心SCICSCD

【文章页数】：9 页

【文章目录】：
1. Introduction
2. Experimental
    2.1. Chemicals
    2.2. Sample preparation
        2.2.1. Synthesis of Sr Bi2Nb2O9 platelets
        2.2.2. Synthesis of H1.78Sr0.78Bi0.22Nb2O7 platelets
        2.2.3. Synthesis of H1.78Sr0.78Bi0.22Nb2O7 nanosheets
        2.2.4. Synthesis of Ni-CH3CH2NH2/H1.78Sr0.78Bi0.22Nb2O7 hybrid layered perovskite
    2.3. Characterization
    2.4. Photocatalytic H2 evolution
3. Results and discussion
    3.1. Crystal structures of the photocatalysts
    3.2. FTIR and XPS results
    3.3. Formation process of the Ni-EA/HSN Ns hybrid layered perovskite
    3.4. Optical properties of the photocatalysts
    3.5. Photocatalytic activities
    3.6. Mechanism of the enhanced photocatalytic activity
4. Conclusions



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