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.

Highly dispersed MoVTeNbO/SiO2 catalysts prepared by the sol–gel method for selective oxidation of propane to acrolein

2009 ◽  
Vol 10 (12) ◽  
pp. 1591-1594 ◽  
Author(s):  
Xiaodong Yi ◽  
Xiaodan Sun ◽  
Xiaobing Zhang ◽  
Chuanjing Huang ◽  
Weizheng Weng ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Highly Dispersed

Visible light photodegradation of phenol on MWNT-TiO2 composite catalysts prepared by a modified sol–gel method

2005 ◽  
Vol 235 (1-2) ◽  
pp. 194-199 ◽  
Author(s):  
Wendong Wang ◽  
Philippe Serp ◽  
Philippe Kalck ◽  
Joaquim Luís Faria
Keyword(s):  
Visible Light ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Composite Catalysts

scholarly journals Mixed Metal Oxides of M1 MoVNbTeOx and TiO2 as Composite Catalyst for Oxidative Dehydrogenation of Ethane

Catalysts ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 71
Author(s):  
Yuxin Chen ◽  
Dan Dang ◽  
Binhang Yan ◽  
Yi Cheng
Keyword(s):  
Metal Oxides ◽  
Oxidative Dehydrogenation ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Mixed Metal Oxides ◽  
Gel Method ◽  
Mixed Metal ◽  
Sol Gel Method ◽  
Composite Catalysts ◽  
Oxidative Dehydrogenation Of Ethane

Composite catalysts of mixed metal oxides were prepared by mixing a phase-pure M1 MoVNbTeOx with anatase-phase TiO2. Two methods were used to prepare the composite catalysts (the simple physically mixed or sol-gel method) for the improvement of the catalytic performance in the oxidative dehydrogenation of ethane (ODHE) process. The results showed that TiO2 particles with a smaller particle size were well dispersed on the M1 surface for the sol-gel method, which presented an excellent activity for ODHE. At the same operating condition (i.e., the contact time of 7.55 gcat·h/molC2H6 and the reaction temperature of 400 °C), the M1-TiO2-SM and M1-TiO2-PM achieved the space time yields of 0.67 and 0.52 kgC2H4/kgcat/h, respectively, which were about ~76% and ~35% more than that of M1 catalyst (0.38 kgC2H4/kgcat/h), respectively. The BET, ICP, XRD, TEM, SEM, H2-TPR, C2H6-TPSR, and XPS techniques were applied to characterize the catalysts. It was noted that the introduction of TiO2 raised the V5+ abundance on the catalyst surface as well as the reactivity of active oxygen species, which made contribution to the promotion of the catalytic performance. The surface morphology and crystal structure of used catalysts of either M1-TiO2-SM or M1-TiO2-PM remained stable as each fresh catalyst after 24 h time-on-stream tests.

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....

Nanocrystalline CNT-TiO2 Composites Produced by an Acid Catalyzed Sol-Gel Method

2008 ◽  
Vol 587-588 ◽  
pp. 849-853 ◽  
Author(s):  
Cláudia G. Silva ◽  
Wen Dong Wang ◽  
Joaquim L. Faria
Keyword(s):  
Carbon Nanotube ◽  
Sol Gel ◽  
Pure Tio2 ◽  
Absorption Properties ◽  
Interphase Interaction ◽  
Gel Method ◽  
Sol Gel Method ◽  
Composite Catalysts ◽  
Acid Catalyzed

Carbon nanotube-TiO2 composites and pure TiO2 are prepared by a modified sol-gel method. The nanoscaled materials obtained are extensively characterized by spectroscopic, microscopic and calorimetric techniques. Their photoactivity is tested in the degradation of phenol under visible illumination. A correlation between the CNT content and the changes in the UV–vis absorption properties was found. The effect induced by CNT on the composite catalysts is explained in terms of an interphase interaction between CNT and TiO2 in the composite catalysts.

Alkaline niobates ANbO3 (A = Li, Na, K) as heterogeneous catalysts for dipropyl sulfide oxidation

RSC Advances ◽  
2016 ◽  
Vol 6 (104) ◽  
pp. 102015-102022 ◽  
Author(s):  
Candelaria Leal Marchena ◽  
Clara Saux ◽  
Robinson Dinamarca ◽  
Gina Pecchi ◽  
Liliana Pierella
Keyword(s):  
Selective Oxidation ◽  
Heterogeneous Catalysts ◽  
Sol Gel ◽  
Sulfide Oxidation ◽  
Type Structure ◽  
Gel Method ◽  
Sol Gel Method ◽  
Perovskite Type ◽  
Perovskite Type Structure

Alkaline ANbO3 (A = Li, Na, K) niobates with perovskite type structure were prepared by sol gel method, extensively characterized and evaluated as heterogeneous catalysts for selective oxidation of dipropyl sulfide to its corresponding sulfoxide.

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.

High yield production of HMF from carbohydrates over silica–alumina composite catalysts

2016 ◽  
Vol 6 (20) ◽  
pp. 7586-7596 ◽  
Author(s):  
Xiangcheng Li ◽  
Qineng Xia ◽  
Van Chuc Nguyen ◽  
Kaihao Peng ◽  
Xiaohui Liu ◽  
...  
Keyword(s):  
Sol Gel ◽  
High Yield ◽  
Efficient Production ◽  
Gel Method ◽  
Sol Gel Method ◽  
Composite Catalysts ◽  
Yield Production ◽  
Silica Alumina ◽  
Alumina Composite ◽  
High Yield Production

Mesoporous AlSiO catalysts have been prepared by a facile sol–gel method with tunable acidity for highly efficient production of HMF.

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