In Situ Synthesis of Bi2O3 Nanoparticles on ZincMe (Me=Al or Cr) Layered Double Hydroxide Frameworks for Photocatalytic Oxygen Evolution from Water under Solar‐Light Activation,ChemCatChem

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In Situ Synthesis of Bi2O3 Nanoparticles on ZincMe (Me=Al or Cr) Layered Double Hydroxide Frameworks for Photocatalytic Oxygen Evolution from Water under Solar‐Light Activation
ChemCatChem ( IF 3.8 ) Pub Date : 2018-02-22 , DOI: 10.1002/cctc.201701749
Gabriela Carja ₁ , Diana Gilea ₁ , Pegie Cool ₂ , Elena M. Seftel _{2,

3}

Affiliation

A key target to boost solar‐to‐chemical conversion processes is to fabricate an efficient solar‐light‐responsive photocatalyst. Herein, we report the in situ synthesis of nanoparticles (NPs) of Bi₂O₃ directly on Zn‐based layered double hydroxide (LDHs) frameworks. The in situ synthesis of Bi₂O₃NPs is done at room temperature, is ligand free and explores the ability of calcined ZnMeLDHs to reconstruct their layered structures in Bi(NO₃)₃ aqueous solution. The in situ formation of Bi₂O₃NPs on ZnMeLDHs is assessed by transmission electron microscopy (TEM), X‐ray photoelectron spectroscopy (XPS), powder X‐ray diffraction (XRD), and UV/Vis spectroscopy and compared with the features of a corresponding Bi₂O₃NPs/LDH prepared by the conventional impregnation route. The rapid photocatalytic response of the Bi₂O₃NPs/ZnMeLDH (Me=Al, Cr) heterostructures is confirmed by O₂ generation from water under solar‐light irradiation. The rate of O₂ generation increases by a factor of approximately 2 for the ZnCrLDH based catalysts as compared to that of the family of ZnAlLDH catalysts. Further, the presence of the bismuth phase and its nano‐dimension leads to increased efficiency for the in situ prepared Bi₂O₃NPs/LDHs as compared to that of impregnated Bi₂O₃/LDH and the pristine LDHs.

中文翻译：

在ZincMe（Me = Al或Cr）层状双氢氧化物骨架上原位合成Bi2O3纳米粒子，用于在太阳光激活下从水中释放光催化的氧气

促进太阳能到化学转化过程的关键目标是制造高效的太阳能响应型光催化剂。本文中，我们报道了直接在基于锌的层状双氢氧化物（LDHs）框架上原位合成Bi ₂ O ₃纳米颗粒（NPs）。Bi ₂ O ₃ NPs的原位合成是在室温下完成的，没有配体，并且探索了煅烧的Zn Me LDHs在Bi（NO ₃）₃水溶液中重建其分层结构的能力。Zn Me上Bi ₂ O ₃ NPs的原位形成通过透射电子显微镜（TEM），X射线光电子能谱（XPS），粉末X射线衍射（XRD）和UV / Vis光谱对LDH进行评估，并将其与相应的Bi ₂ O ₃ NPs / LDH的特征进行比较通过常规的浸渍途径。Bi ₂ O ₃ NPs / Zn Me LDH（Me = Al，Cr）异质结构的快速光催化反应可以通过在太阳光照射下从水中生成O ₂来证实。O ₂的比率与基于ZnAlLDH的催化剂系列相比，基于ZnCrLDH的催化剂的生成量增加了约2倍。此外，与浸渍的Bi ₂ O ₃ / LDH和原始的LDHs相比，铋相及其纳米级的存在导致原位制备的Bi ₂ O ₃ NPs / LDHs的效率提高。

更新日期：2018-02-22

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