High Efficient Photoreduction CO2 with H2O on Metal Cu-Modified Graphitic Ordered Mesoporous Carbon Supported TiO2 Catalysts under Simulated Solar

2014 ◽  
Vol 906 ◽  
pp. 39-44
Author(s):  
Cheng Li Zhang ◽  
Shi Fei Kang ◽  
Qian Yu Zhang ◽  
Xi Li
Keyword(s):  
Electron Microscopy ◽  
Mesoporous Carbon ◽  
Nitrogen Adsorption ◽  
High Specific Surface Area ◽  
Ordered Mesoporous Carbon ◽  
Solar Irradiation ◽  
Transmission Electron Microscopy Analysis ◽  
Ordered Mesoporous ◽  
High Efficient ◽  
Electron Microscopy Analysis

Cu-modified graphitic ordered mesoporous carbon supported TiO2 catalyst was synthesized based on a hard template method. X-ray diffraction, nitrogen adsorption-desorption, scanning electron microscopy and transmission electron microscopy analysis techinques were used to characterize the sample. It was observed that copper and anatase TiO2 nanoparticles were well dispersed in the Cu-modified mesoporous graphitic carbon, and the resulting composite with ordered mesostructure and high specific surface area exhibited an exceptionally high activity in the photocatalytic reduction of CO2 with H2O under simulated solar irradiation.

ELECTROCHEMICAL PERFORMANCE OF ORDERED MESOPOROUS CARBON MODIFIED BY OXIDATIVE TREATMENT WITH AQUEOUS NITRIC ACID

2016 ◽  
Vol 78 (3-2) ◽  
Author(s):  
Nur Izzatie Hannah Razman ◽  
Salasiah Endud ◽  
Izan Izwan Misnon ◽  
Zainab Ramli
Keyword(s):  
Electron Microscopy ◽  
Nitric Acid ◽  
Electrochemical Performance ◽  
Mesoporous Carbon ◽  
Nitrogen Adsorption ◽  
Ordered Mesoporous Carbon ◽  
Replication Process ◽  
Oxidative Treatment ◽  
Ordered Mesoporous ◽  
Aqueous Nitric Acid

In this study, ordered mesoporous carbon (OMC) was prepared via nano-casting method by using Santa Barbara Amorphous (SBA)-15 as a template and sucrose as a carbon precursor. The OMC was subsequently oxidized with aqueous nitric acid and referred as MOMC. The physicochemical properties of OMC and MOMC were determined using nitrogen adsorption–desorption analyser, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR). The results proved that the carbon replication process was successful. The electrochemical performance tests were carried out using cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) in 1 M KOH electrolyte for 1000 cycles. After oxidative treatment, the specific surface area and pore volume of OMC decreased but the specific capacitance of the electrode material has significantly increased from 117      F g–1 to 344 F g–1 at a scan rate of 10 mV s–1.   

Ordered Mesoporous Carbon Nano Spheres as Electrode Material for Supercapacitors

2013 ◽  
Vol 320 ◽  
pp. 661-664
Author(s):  
Hai Jing Zhao ◽  
Dong Lin Zhao ◽  
Ji Ming Zhang ◽  
Dong Dong Zhang
Keyword(s):  
Mesoporous Carbon ◽  
Electrode Materials ◽  
Rate Capability ◽  
Nitrogen Adsorption ◽  
Ordered Mesoporous Carbon ◽  
Electrochemical Performances ◽  
Carbon Nanospheres ◽  
Electrochemical Testing ◽  
Ordered Mesoporous ◽  
Coating Method

Ordered mesoporous carbon nanospheres with uniformly penetrating channels have been successfully synthesized by a nanocasting method using mesoporous silica as a template. The ordered mesoporous carbon nanospheres were investigated as electrode materials for supercapacitors via high-resolution transmission electron microscopy, nitrogen adsorption and desorption isotherms and a variety of electrochemical testing techniques. The electrodes with ordered mesoporous carbon nanospheres prepared by coating method exhibited good rate capability and reversibility at high scan rates in electrochemical performances. Ordered mesoporous carbon nanosphere electrode with specific surface area of 904 m2/g maintained a stable specific capacitance of 210 F g-1under specific current of 0.1 A g-1for 500 cycles of charge/discharge.

scholarly journals Synthesis of mesoporous ceria using metal- and halogen-free ordered mesoporous carbon as a hard template

2019 ◽  
Vol 1 (12) ◽  
pp. 4772-4782 ◽  
Author(s):  
Farzeen Sakina ◽  
Juan Manuel Muñoz-Ocaña ◽  
Ainuona Bouziane ◽  
Miguel Lopez-Haro ◽  
Richard T. Baker
Keyword(s):  
Electron Microscopy ◽  
Mesoporous Carbon ◽  
Free Carbon ◽  
Ordered Mesoporous Carbon ◽  
Hard Template ◽  
Carbon Template ◽  
Ordered Mesoporous ◽  
Halogen Free

Nanostructure of ordered mesoporous ceria nanocast from a metal- and halogen-free carbon template determined by physisorption, electron microscopy and tomography.

scholarly journals Three-Dimensional Ordered Mesoporous Carbon Spheres Modified with Ultrafine Zinc Oxide Nanoparticles for Enhanced Microwave Absorption Properties

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Yan Song ◽  
Fuxing Yin ◽  
Chengwei Zhang ◽  
Weibing Guo ◽  
Liying Han ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Mesoporous Carbon ◽  
Three Dimensional ◽  
Ordered Mesoporous Carbon ◽  
Material Research ◽  
Carbon Spheres ◽  
Zno Nps ◽  
Ordered Mesoporous ◽  
High Efficient ◽  
Microwave Absorbing

AbstractCurrently, electromagnetic radiation and interference have a significant effect on the operation of electronic devices and human health systems. Thus, developing excellent microwave absorbers have a huge significance in the material research field. Herein, a kind of ultrafine zinc oxide (ZnO) nanoparticles (NPs) supported on three-dimensional (3D) ordered mesoporous carbon spheres (ZnO/OMCS) is prepared from silica inverse opal by using phenolic resol precursor as carbon source. The prepared lightweight ZnO/OMCS nanocomposites exhibit 3D ordered carbon sphere array and highly dispersed ultrafine ZnO NPs on the mesoporous cell walls of carbon spheres. ZnO/OMCS-30 shows microwave absorbing ability with a strong absorption (− 39.3 dB at 10.4 GHz with a small thickness of 2 mm) and a broad effective absorption bandwidth (9.1 GHz). The outstanding microwave absorbing ability benefits to the well-dispersed ultrafine ZnO NPs and the 3D ordered mesoporous carbon spheres structure. This work opened up a unique way for developing lightweight and high-efficient carbon-based microwave absorbing materials.

Synthesis, Characterization and Physiochemical Properties of Platinum Supported on Mesoporous Carbon

2011 ◽  
Author(s):  
Salam J. J. Titinchi ◽  
Waheed Saban ◽  
Leslie Petrik ◽  
Hanna S. Abbo
Keyword(s):  
Surface Area ◽  
Pore Volume ◽  
Mesoporous Carbon ◽  
Chemical Vapour ◽  
Nitrogen Adsorption ◽  
Ordered Mesoporous Carbon ◽  
Pt Catalyst ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ordered Mesoporous

Ordered mesoporous carbon (OMC) has been prepared by impregnating the pores of the silica template (SBA-15) with liquid petroleum gas (LPG) or sucrose. The desired support (OMC) was obtained after dissolution with NaOH. Platinum nanoparticles were dispersed on ordered mesoporous carbons using Chemical Vapour Deposition (CVD) method and Pt(acac)2 as metal source. The resulting ordered mesoporous carbon possess a large surface area with high microporosity, and a controlled pore size distribution, High-quality carbon replicas of SBA-15 show an X-ray diffraction peak at low angle, which indicates that the structural periodicity of the (111) planes has been maintained. Their pore volume and specific surface area are high and the pore volume is almost entirely microporous. The synthesized Pt/OMC was characterized by powder X-Ray diffraction, HR-TEM, HR-SEM, EDS, thermogravimetric analysis, and nitrogen adsorption. The performance of Pt catalyst supported OMC was evaluated by electrochemical studies, which shows almost similar activity to the commercial catalyst.

Pore Size Control of Ordered Mesoporous Carbons and Adsorption Performance of Dye Molecules

2014 ◽  
Vol 548-549 ◽  
pp. 38-42
Author(s):  
Yang Cao ◽  
Jian Zhong Zhu ◽  
Ying Ding ◽  
Gang Han ◽  
Rong Liang Fan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Mesoporous Carbon ◽  
Selective Adsorption ◽  
Size Control ◽  
Ordered Mesoporous Carbon ◽  
Assembly Method ◽  
Ordered Mesoporous

Different kinds of mesoporous carbon materials can be obtained through the use of different templates or control condition. The study describes the adsorption behavior of dyes such as rhodamine B, methylthionine chloride and reactive red from aqueous solution using ordered mesoporous carbon in different pore size distribution. In this study, the method of controlling the aperture of ordered mesoporous carbon is changing the mass ratio of the revised template and carbon source. Ordered mesoporous carbon was synthesized with the evaporation induced self-assembly method in different proportion of template agent (F127) and phenolic resin and employed to evaluate the effects of initial concentration, contact time, pH and temperature on the removal of dye solution in batch experiments. The samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N2 adsorption-desorption. These analyses reveal that the mesoporous carbon have ordered structure. The experimental results indicated the ordered mesoporous carbon in different pore size distribution showed significant differences in the adsorption of different dyes and it was provided with an excellent selective adsorption.

Synthesis and Characterization of Platinum-Containing Ordered Mesoporous Carbon with High Specific Surface Area

2009 ◽  
Vol 79-82 ◽  
pp. 2035-2038 ◽  
Author(s):  
Zhi Hong Ji ◽  
Yan Bin Jiang ◽  
Hao Li ◽  
Li Ye ◽  
Wei Jian Han ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Mesoporous Carbon ◽  
Pt Nanoparticles ◽  
High Specific Surface Area ◽  
Ordered Mesoporous Carbon ◽  
Assembly Method ◽  
Ordered Mesoporous ◽  
Platinum Particles

A Pt-containing ordered mesoporous carbon with a high specific surface area was synthesized through evaporation-induced multi-constituent co-assembly method, wherein soluble resol polymer is used as the carbon precursor, silicate oligomers as the inorganic precursor, triblock copolymer as the template, and H2PtCl6•6H2O as the Pt precursor. After thermopolymerization, the template was removed by calcinations, and silica was removed by NaOH solutions. The resultant sample was characterized by X-ray diffraction, nitrogen sorption and transmission electron microscopy. The results showed that the carbon material exhibited highly ordered mesoporous structure, with a high specific surface area of 1560 m2/g, and the pore size distributions of the sample are very narrow, centering at around 6 nm; and the platinum particles with sizes of less than 8 nm were highly distributed in the carbon matrix. The high specific surface area may be ascribed to plenty of small pores inside carbon walls caused by the removal of silica from the composites. Interaction between the Pt4+ and the resin caused the Pt species to be incorporated into the framework of the resin, which was self-assembled into an ordering structure under the direction of the surfactant. After being subjected to pyrolysis at a high temperature, the Pt4+ ions were gradually reduced to form Pt nanoparticles, which were strongly imbedded in the carbon substrate and thereby thermally stable. The removal of silica may result in the exposure of Pt nanoparticles, which render Pt nanoparticles to contact easily with reactant molecules.

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