Ru-nanoparticle deposition on naturally available clay and rice husk biomass materials—Benzene hydrogenation catalysis and synthetic strategies for green catalyst development
Ru-nanoparticle deposition on naturally available clay and rice husk biomass materials—Benzene hydrogenation catalysis and synthetic strategies for green catalyst development
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DOI：
10.1039/c1cy00269d
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发表时间：
2012-03
影响因子：
5
通讯作者：
O. Shawkataly;R. Jothiramalingam;Farook Adam;T. Radhika;T. Tsao;M. K. Wang
中科院分区：
文献类型：
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作者：
O. Shawkataly;R. Jothiramalingam;Farook Adam;T. Radhika;T. Tsao;M. K. Wang
我们证明了钌纳米粒子的快速合成支持自然可分离的土壤粘土和二氧化铈改性稻壳二氧化硅生物质。钌纳米颗粒在纳米粘土（粘土颗粒<100 nm）和稻壳二氧化硅上的沉积通过高压氢化过程进行。钌有机金属化合物用作钌纳米颗粒形成的前体。采用XRD、FT-IR、SEM-EDX和TEM等分析手段对合成材料的理化性质进行了表征。通过XRD和FT-IR分析证实了钌纳米颗粒成功地结合在纳米粘土（Ru/Nanoclay-A）和二氧化铈改性的稻壳二氧化硅（Ru/Ce-RHS-B）上。本文还合成了负载钌的Ce-Ce/RHS-C催化剂，并对其进行了表征。对于Ru/纳米粘土-A，观察到60-80 nm之间的球形颗粒。而生物质来源的Ru/Ce-RHS-B和Ru-Ce/RHS-C材料则表现出聚集形态。在上述三种催化剂Ru/Nanoclay-A、Ru/Ce-RHS-B和Ru-Ce/RHS-C的存在下，研究了高压条件下苯加氢反应。与其它催化剂相比，Ru/Ce-RHS-B催化剂的最高转化率为85%，环己烯选择性为72%。
We demonstrate the rapid synthesis of ruthenium nanoparticle supported on naturally available isolated soil clay and ceria-modified rice husk silica biomass. Ruthenium nanoparticle deposition on nanoclay (clay particles of <100 nm) and on rice husk silica was performed via a high pressure hydrogenation process. A ruthenium organometallic compound was used as a precursor for ruthenium nanoparticle formation. The physico-chemical characteristics of the synthesized materials were analyzed by XRD, FT-IR, SEM-EDX and TEM analysis. The successful incorporation of ruthenium nanoparticle on nanoclay (Ru/Nanoclay-A) and on ceria-modified rice husk silica (Ru/Ce-RHS-B) was confirmed by XRD and FT-IR analysis. Ruthenium deposition on ceira-modified rice husk silica catalyst (Ru-Ce/RHS-C) has also been synthesized and characterized for a comparison study. The spherical shaped particles were observed between 60–80 nm for Ru/Nanoclay-A. However Ru/Ce-RHS-B and Ru-Ce/RHS-C material derived from biomass showed an aggregated morphology. Benzene hydrogenation under high pressure conditions has been studied in presence of the aforementioned three types of catalysts, Ru/Nanoclay-A, Ru/Ce-RHS-B and Ru-Ce/RHS-C. The Ru/Ce-RHS-B catalyst showed maximum conversion of 85% with selectivity of 72% towards cyclohexene formation, compared with other catalysts.