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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A hybrid composite of hydroxyapatite and Ca-Al layered double hydroxide supported Au nanoparticles for highly efficient base-free aerobic oxidation of glucose
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A hybrid composite of hydroxyapatite and Ca-Al layered double hydroxide supported Au nanoparticles for highly efficient base-free aerobic oxidation of glucose

机译：羟基磷灰石和Ca-Al分层双氢氧化物的杂化复合物负载Au纳米粒子，用于高效无菌的葡萄糖有氧氧化

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摘要

In this work, a new hybrid composite of hydroxyapatite and Ca-Al layered double hydroxide (HAP-LDH) was successfully assembled via an in situ growth route, by which large quantities of small needle-like HAP crystals in situ grew over the lateral surface of large platelet-like CaAl-LDH particles, and applied to immobilize Au nanoparticles for base-free aerobic glucose oxidation in water to produce gluconic acid using molecular oxygen. A combination of characterization techniques and catalytic experiments revealed that the activity of supported Au catalysts was strongly associated with the composition of supports, and the hybrid HAP-LDH supported one with a Au loading amount of about 0.2 wt% delivered a high gluconic acid yield of >98% under optimal reaction conditions, along with a quite high turnover frequency value of similar to 20225 h(-1). High efficiency of the as-formed Au/HAP-LDH was mainly ascribed to cooperation between favorable surface Au species (Au-0/Au delta+) and abundant basic sites. Furthermore, the present catalyst also presented good structural stability, because of the novel hybrid three-dimensional nano/microstructure of the HAP-LDH composite support facilitating the stabilization of active Au species and components of the support. The present synthesis strategy of employing a hybrid composite support provides a new way to design stable and high-performance supported metal nanocatalysts for a variety of advanced heterogeneous catalytic processes.
机译：在这项工作中，通过原位生长途径成功地组装了一种新的羟基磷灰石和Ca-Al层层双氢氧化物（HAP-LDH）的新杂化复合物，通过该途径，大量的小针状Hap晶体原位在横向表面上增长大的血小板甲状腺-LDH颗粒，并施加以固定Au纳米颗粒用于在水中免受无氧的有氧葡萄糖氧化，产生使用分子氧的葡萄糖酸。表征技术和催化实验的组合表明，负载的Au催化剂的活性与载体组合物强烈有关，并且杂交HAP-LDH负载的Au负载量为约0.2wt％的葡萄糖酸产量>在最佳反应条件下> 98％，以及相当高的周转频率值与20225小时（-1）。 AS形成的AU / HAP-LDH的高效率主要归因于良好的表面AU（AU-0 / Au Delta +）和丰富的基本位点之间的合作。此外，本催化剂也呈现出良好的结构稳定性，因为新型杂交三维纳米/微结构的HAP-LDH复合载体促进了活性Au种和载体的组分。采用混合复合材料的本发明的合成策略为各种先进的异质催化过程设计了一种设计稳定和高性能支持的金属纳米催化剂的新方法。

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    Zhuge Yunfeng; Fan Guoli; Lin Yanjun; Yang Lan; Li Feng;

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    Beijing Univ Chem Technol Beijing Adv Innovat Ctr Soft Matter Sci &

    Engn State Key Lab Chem Resources Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Beijing Adv Innovat Ctr Soft Matter Sci &

    Engn State Key Lab Chem Resources Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Beijing Adv Innovat Ctr Soft Matter Sci &

    Engn State Key Lab Chem Resources Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Beijing Adv Innovat Ctr Soft Matter Sci &

    Engn State Key Lab Chem Resources Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Beijing Adv Innovat Ctr Soft Matter Sci &

    Engn State Key Lab Chem Resources Engn Beijing 100029 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;无机化学;
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