Sol-gel preparation of crystalline Ni12P5/N-doped carbon and amorphous Ni-P-C catalysts and their high catalytic performances toward hydrogenation reduction reaction of 4-nitrophenol

2021 ◽  
Author(s):  
Pingyun Li ◽  
Haitao Ni ◽  
Shengxiang Jiang ◽  
Han Wang
Keyword(s):  
Sol Gel ◽  
Reduction Reaction ◽  
Tube Furnace ◽  
Gel Method ◽  
Sol Gel Method ◽  
Gel Preparation ◽  
Catalytic Performances

Sol-gel method was conducted to prepare Ni12P5/N-doped carbon and amorphous Ni-P-C materials where heating treatments of the dried gel precursors were operated under N2 protecting atmosphere in a tube furnace....

scholarly journals A Simulation Study of Effect of Mn-Ce/γ-Al2O3on NOxStorage and Reduction over Pt-Ce-Ba/γ-Al2O3Catalysts

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Lili Lei ◽  
Chuan Sun ◽  
Bo Zhang ◽  
Wenye Gu
Keyword(s):  
Simulation Study ◽  
Sol Gel ◽  
Reduction Reaction ◽  
No Oxidation ◽  
Reduction Of No ◽  
Gel Method ◽  
Sol Gel Method

A series of Pt-Ce-Ba/γ-Al2O3and Mn-Ce/γ-Al2O3catalysts were synthesized by a sol-gel method and the samples were characterized by XRD, SEM, and EDS. The effect of Mn-Ce/γ-Al2O3on the storage and reduction of NOxover Pt-Ce-Ba/γ-Al2O3catalysts was studied in a fix-bed reactor with simulation gases NO, O2, and N2. The results indicated that NO oxidation to NO2was reduced with the increase of inlet NO concentration, which was up to 83% when the concentration of NO was 500 ppm but reduced to 76% with the concentration of NO increasing to 1000 ppm. Comparing with the Pt-Ce-Ba/γ-Al2O3catalysts, the rate of NOxstorage and reduction was remarkably increased over Pt-Ce-Ba/γ-Al2O3combined with Mn-Ce/γ-Al2O3catalysts. However, the reductant used for NOxreduction reaction over Pt-Ce-Ba/γ-Al2O3catalysts was consumed under the treatment of Mn-Ce/γ-Al2O3catalyst, which caused the NOxconversion to obviously drop, but the rate of NOxabsorption declined slightly.

The Self-Cleaning Effect of Sol-Gel Preparation of Nano-Diamond and Nano-SiC Film was Compared

2019 ◽  
Vol 807 ◽  
pp. 68-73
Author(s):  
Xiu Xia Zhang ◽  
Hai Sheng Zhang ◽  
Guan Nan Du ◽  
Shu Yi Wei ◽  
Kai Nan Zhang ◽  
...  
Keyword(s):  
Glass Substrate ◽  
Sol Gel ◽  
Contrast Material ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Gel Method ◽  
Sol Gel Method ◽  
Long Time ◽  
Self Cleaning ◽  
Gel Preparation

Through continuous experiments, scientists have found that nanomaterials have self-cleaning properties. Solar cells coated with nanometer film can keep their surface clean for a long time and maintain high photoelectric conversion efficiency. nanodiamond films were prepared on glass substrate by sol-gel method. nanosilicon carbide was also selected as the contrast material. Silicon carbide (SiC) has good chemical stability, corrosion resistance and other characteristics. nanosic films were prepared by sol-gel method on glass substrate. The production cost of sol-gel method was relatively low, the coating uniformity was suitable for mass production

Direct synthesis of V–W–Ti nanoparticle catalysts for selective catalytic reduction of NO with NH3

RSC Advances ◽  
2015 ◽  
Vol 5 (56) ◽  
pp. 45172-45183 ◽  
Author(s):  
Kai Cheng ◽  
Jian Liu ◽  
Zhen Zhao ◽  
Yuechang Wei ◽  
Guiyuan Jiang ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Direct Synthesis ◽  
Sol Gel ◽  
Reduction Of No ◽  
Gel Method ◽  
Sol Gel Method ◽  
Nanoparticle Catalysts ◽  
Catalytic Performances

A series of V–W–Ti nanoparticle catalysts with variable V doping amounts were directly synthesized by the sol–gel method, and their catalytic performances were tested for the selective catalytic reduction of NO with ammonia.

ZnO nanorods covered with a TiO2 layer: simple sol–gel preparation, and optical, photocatalytic and photoelectrochemical properties

2015 ◽  
Vol 3 (24) ◽  
pp. 12748-12760 ◽  
Author(s):  
Maciej Kwiatkowski ◽  
Igor Bezverkhyy ◽  
Magdalena Skompska
Keyword(s):  
Sol Gel ◽  
Zno Nanorods ◽  
Core Shell ◽  
Photoelectrochemical Properties ◽  
Tio2 Layer ◽  
Gel Method ◽  
Sol Gel Method ◽  
Ito Electrode ◽  
Gel Preparation

In this work, composite core–shell ZnO/TiO2 materials were fabricated by deposition of TiO2 layers via sol–gel method on ZnO nanorods hydrothermally grown on ITO electrode.

Preparation of ultrafine silicon oxycarbide fiber mats via electrospinning/sol–gel method: Investigation of the solution spinnability

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040004
Author(s):  
Yixuan Wang ◽  
Ting Zhang ◽  
Xiaoyu Yue ◽  
Junyao Wu ◽  
Wei Gao
Keyword(s):  
Sol Gel ◽  
Silicon Oxycarbide ◽  
Solution Viscosity ◽  
Free Standing ◽  
Electrospinning Technique ◽  
Fiber Mats ◽  
Gel Method ◽  
Sol Gel Method ◽  
Wide Range ◽  
Gel Preparation

Ultrafine silicon oxycarbide (SiOC) fiber mats were prepared through a sol–gel method combined electrospinning technique. The influence of sol–gel solution viscosity on its spinnability has been studied. By partially removing solvents after the sol–gel preparation, the solution could be stably spun and resulted in fiber mats with an average fiber diameter of 560 nm. The formation, morphology and composition of the SiOC fiber mats have been studied by TGA, FT-IR, SEM, XPS and XRD. Due to flexibility and free-standing property, the SiOC fiber mats will have a wide range of applications.

Efficient V2O5/TiO2 composite catalysts for dimethoxymethane synthesis from methanol selective oxidation

RSC Advances ◽  
2015 ◽  
Vol 5 (31) ◽  
pp. 24795-24802 ◽  
Author(s):  
Zhihong Fan ◽  
Heqin Guo ◽  
Kegong Fang ◽  
Yuhan Sun
Keyword(s):  
Selective Oxidation ◽  
Sol Gel ◽  
Methanol Conversion ◽  
Gel Method ◽  
Sol Gel Method ◽  
Composite Catalysts ◽  
Methanol Selective Oxidation ◽  
Catalytic Performances

The figure presented the catalytic performances of composite supported V2O5–TiO2–SiO2 catalyst prepared by improved sol–gel method. V2O5–TiO2–SiO2 catalyst showed efficient activity of 51% methanol conversion and 99% DMM selectivity at 413 K.

scholarly journals The catalytic performances and reaction mechanism of nanoparticle Cd/Ce–Ti oxide catalysts for NH3-SCR reaction

RSC Advances ◽  
2017 ◽  
Vol 7 (79) ◽  
pp. 50127-50134 ◽  
Author(s):  
Zhichen Duan ◽  
Kebin Chi ◽  
Jian Liu ◽  
Juan Shi ◽  
Zhen Zhao ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Sol Gel ◽  
Oxide Catalysts ◽  
Incipient Wetness Impregnation ◽  
Gel Method ◽  
Sol Gel Method ◽  
Nanoparticle Catalysts ◽  
Nh3 Scr ◽  
Incipient Wetness ◽  
Catalytic Performances

Ce0.3–TiOxnanoparticle carrier was prepared by the sol–gel method, and a series of Cd–Ce–Ti nanoparticle catalysts with variable Cd contents were prepared by the means of an improved incipient-wetness impregnation.

Preparation and Photoluminescence of Red, Green and Blue Fluorescent Dyes Co-Doped Nanoporous Silica by a Sol-Gel Method

2014 ◽  
Vol 668-669 ◽  
pp. 48-51
Author(s):  
Jun Ling Wang ◽  
Xu Liang Zhou ◽  
Zhuan Li ◽  
Chun Mei Liu
Keyword(s):  
Fluorescent Dyes ◽  
Sol Gel ◽  
Molar Ratio ◽  
Nanoporous Silica ◽  
Gel Method ◽  
Sol Gel Method ◽  
Sol Gel Process ◽  
Key Factor ◽  
Gel Preparation ◽  
Co Doped

One sol-gel method is explored to prepare red, green and blue (RGB) fluorescent dyes co-doped nanoporous silica at low temperature in air. All of the dyes covers blue-emitting 2, 5-bis (5-tert-butyl-2-benzoxazolyl)- thiophene (BBOT), green-emitting Coumarin 152A (Coumarin) and red-emitting Lumogen red R305 (Lumogen), contributing to the photoluminescence (PL) of the hybrid. As a key factor, the molar ratio of reactants TEOS/Dioxane/ H2O is 3:12:4 during the sol-gel process. The maximum doping concentration of dyes is the result of dyes dispersing into nanoporous silica, which supported by Infrared Spectroscopy (IR) and X-ray diffraction (XRD) technology. So this sol-gel preparation can enrich the inorganic luminescent materials at a simple style, especially for PL materials or electroluminescent (EL) materials in thin films state.

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