Direct synthesis of gold nanodispersions in sol–gel derived silicate sols, gels and films

1997 ◽  
pp. 2303-2304 ◽  
Author(s):  
S. Bharathi ◽  
O. Lev
Keyword(s):  
Direct Synthesis ◽  
Sol Gel

Direct Synthesis of 3,5-Dinitropyrazole Catalyzed by Newly Sulfated Nanosolid Superacid TiO2/ SO

2011 ◽  
Vol 391-392 ◽  
pp. 1296-1301
Author(s):  
Li Min Xi ◽  
Xin Xin Zhang
Keyword(s):  
Direct Synthesis ◽  
Sol Gel ◽  
Acid Base ◽  
Direct Transformation ◽  
Acid Base Titration ◽  
Optimal Reaction Condition ◽  
Superacid Catalyst ◽  
Average Size ◽  
Optimal Reaction ◽  
Xrd And Tem

The newly sulfated nanosolid superacid TiO2/SO4 prepared by sol-gel method was broadly characterized by acid base titration, XRD and TEM, which identified that the superfine solid TiO2/SO4 showing good dispersibility with average size of 27 nm belongs to kind of crystalline nanoparticles. With the help of the catalyst TiO2/SO4, the optimal reaction condition for direct transformation of pyrazole and nitrosonitric acid into 3, 5-Dinitropyrazole was n (pyrazol)=0.10 mol, m (TiO2/SO4 )＝1.5g, V(n-octannol)＝90mL, and V(nitrosonitric acid)＝50mL. Moreover, the optimal yield of the catalytic reaction reached up to 59.4% when the reaction time is 7 hours. The nanosolid superacid catalyst is still of high activity after regenerating eight times by calcination at 600。C.

Direct synthesis of La9.33Si6O26 ultrafine powder via sol–gel self-combustion method

2008 ◽  
Vol 458 (1-2) ◽  
pp. 378-382 ◽  
Author(s):  
Changan Tian ◽  
Junliang Liu ◽  
Jun Cai ◽  
Yanwei Zeng
Keyword(s):  
Direct Synthesis ◽  
Sol Gel ◽  
Combustion Method ◽  
Ultrafine Powder

ChemInform Abstract: Direct Synthesis of La9.33Si6O26Ultrafine Powder via Sol-Gel Self-Combustion Method.

ChemInform ◽  
2008 ◽  
Vol 39 (36) ◽  
Author(s):  
Changan Tian ◽  
Junliang Liu ◽  
Jun Cai ◽  
Yanwei Zeng
Keyword(s):  
Direct Synthesis ◽  
Sol Gel ◽  
Combustion Method

Direct synthesis of CeO2/SiO2 mesostructured composite materials via sol–gel process

2009 ◽  
Vol 120 (3) ◽  
pp. 421-425 ◽  
Author(s):  
Jiansheng Li ◽  
Yanxia Hao ◽  
Huijun Li ◽  
Minya Xia ◽  
Xiuyun Sun ◽  
...  
Keyword(s):  
Composite Materials ◽  
Direct Synthesis ◽  
Sol Gel ◽  
Sol Gel Process

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.

Synthesis of Dimethyl Carbonate from Methanol and Carbon Dioxide by Heteropolyacid/Metal Oxide Catalysts

2007 ◽  
Vol 119 ◽  
pp. 287-290 ◽  
Author(s):  
Kyung Won La ◽  
Min Hye Youn ◽  
Jin Suk Chung ◽  
Sung Hyeon Baeck ◽  
In Kyu Song
Keyword(s):  
Carbon Dioxide ◽  
Metal Oxide ◽  
Dimethyl Carbonate ◽  
Batch Reactor ◽  
Direct Synthesis ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Acid Sites ◽  
Pure Ceo2 ◽  
Autoclave Reactor

CexTi1-xO2 and H3PW12O40/CexTi1-xO2 catalysts were prepared by sol-gel method, and they were applied to the direct synthesis of dimethyl carbonate (DMC) from methanol and carbon dioxide in a batch reactor. The reaction was carried out in an autoclave reactor at 170oC and 5 MPa. It was found that CexTi1-xO2 exhibited a higher catalytic performance than pure CeO2 and TiO2. The catalytic performance of CexTi1-xO2 was the maximum when x=0.1. It was also revealed that H3PW12O40/CexTi1-xO2 catalysts showed a remarkably enhanced catalytic performance than the corresponding CexTi1-xO2 catalysts. The amount of DMC produced by 15 wt% H3PW12O40/ Ce0.1Ti0.9O2 catalyst was six times higher than that produced by Ce0.1Ti0.9O2 catalyst. It is concluded that both Brönsted acid sites provided by H3PW12O40 and base sites in CexTi1-xO2 played an important role in improving the catalytic performance of H3PW12O40/CexTi1-xO2.

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