نتایج جستجو برای: graphene oxide decorated with ceo2 nanoparticles

تعداد نتایج: 9350984  

Journal: :Lab on a chip 2012
Seung-Kon Lee Xiaoying Liu Víctor Sebastián Cabeza Klavs F Jensen

We present a successive microfluidic approach to create and characterize hierarchical catalyst structures consisting of metal-decorated nanoparticles that are assembled into porous microparticles ("supraball" catalysts). First, using a silicon microreactor, platinum nanoparticles with a very narrow size distribution are grown and immobilized uniformly onto iron oxide/silica core-shell nanospher...

Journal: :Nanoscale 2013
Baocang Liu Qin Wang Shengli Yu Tuo Zhao Jiaxing Han Peng Jing Wenting Hu Lixia Liu Jun Zhang Ling-Dong Sun Chun-Hua Yan

We report the design and realization of double shelled @CeO2/M@M/TiO2 (M = Au and/or Pd) nanospheres with dual noble metal nanoparticles encapsulated in metal oxide shells via a layer-by-layer deposition process followed by an alkali etching method. The resulting nanospheres possess uniform sizes, variable shell components and thicknesses, adjustable noble metal nanoparticles encapsulated, regu...

Journal: :Sustainable Materials and Technologies 2022

This paper reports a novel approach to the use of carbon, in form reduced graphene oxide, as reducing agent for Au(III) chloride complex ions. allows fabrication composite material [email protected]r single-step process. The reduction ions was performed using high pressure, 50 bar, and temperature, 250°C, reactor. average diameter obtained gold nanoparticles below 3 nm. advantage oxide is its s...

2014
Duangdao Channei Sukon Phanichphant

The Fe3O4/CeO2 magnetic photocatalyst was prepared by coating directly onto the surface of magnetic Fe3O4 particles. However a direct contact of CeO2 onto the surface of magnetic Fe3O4 particles presented unfavorable heterojunction, thus the SiO2 barrier layer between magnetic Fe3O4 and CeO2 was prepared as a core-shell stucture to reduce the negative effect by combining three steps of the hydr...

2016
Rebeca Ortega-Amaya Yasuhiro Matsumoto Andrés M Espinoza-Rivas Manuel A Pérez-Guzmán Mauricio Ortega-López

This work describes the formation of reduced graphene oxide-coated copper oxide and copper nanoparticles (rGO-Cu2ONPs, rGO-CuNPs) on the surface of a copper foil supporting graphene oxide (GO) at annealing temperatures of 200-1000 °C, under an Ar atmosphere. These hybrid nanostructures were developed from bare copper oxide nanoparticles which grew at an annealing temperature of 80 °C under nitr...

2016
Panpan Guan Yongjian Li Jie Zhang Wei Li

Copper oxide (CuO)-decorated cerium oxide (CeO₂) nanoparticles were synthesized and used to detect glucose non-enzymatically. The morphological characteristics and structure of the nanoparticles were characterized through transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The sensor responses of electrodes to glucose were investigated via an electrochemic...

2017
P. Tamizhdurai Subramanian Sakthinathan Shen-Ming Chen K. Shanthi S. Sivasanker P. Sangeetha

Cerium oxide nanoparticles (CeO2 NPs) are favorable in nanotechnology based on some remarkable properties. In this study, the crystalline CeO2 NPs are successfully prepared by an efficient microwave combustion (MCM) and conventional route sol-gel (CRSGM) methods. The structural morphology of the as-prepared CeO2 NPs was investigated by various spectroscopic and analytical techniques. Moreover, ...

Journal: :Molecules 2017
Shan Zhang Jie Shi Qianchun Deng Mingming Zheng Chuyun Wan Chang Zheng Ya Li Fenghong Huang

Herein, a promising carrier, graphene oxide (GO) decorated with ZnO nanoparticles, denoted as GO/ZnO composite, has been designed and constructed. This carrier was characterized by X-ray powder diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and thermogravimetry. Then, Candida rugosa lipase (CRL) was immobilized onto the GO-based materials via physical adsorpt...

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