Key Laboratory of Applied Chemistry of Zhejiang Province

of Zhejiang Province, China

Key Laboratory of Applied Chemistry of Zhejiang Province

of Zhejiang Province, China
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Wang J.,Key Laboratory of Applied Chemistry of Zhejiang Province | Wang J.,Zhejiang University | Liu X.,Key Laboratory of Applied Chemistry of Zhejiang Province | Liu X.,Zhejiang University | And 8 more authors.
Catalysis Communications | Year: 2012

TiO 2 nanoparticles with improved photocatalytic activity (TiO 2NPs-NaCl(R)) were synthesized through a well controlled sol-gel process in the presence of NaCl. Instead of being incorporated into the lattice of TiO 2, the added sodium chloride can be completely removed from the resultant TiO 2NPs-NaCl(R) by DI water. The results showed that TiO 2NPs-NaCl(R) has 2 times more surface hydroxyl groups than that in TiO 2NPs prepared without adding NaCl. Consequently TiO 2NPs-NaCl(R) exhibits an enhanced photocatalytic activity for degradation of methylene blue (MB) and HCHO under UV irradiation. This research provides a simple and economic approach to improve photocatalytic performance of TiO 2 related materials.


Sun H.,Zhejiang University | Sun H.,Key Laboratory of Applied Chemistry of Zhejiang Province | Ding Y.,Zhejiang University | Ding Y.,Key Laboratory of Applied Chemistry of Zhejiang Province | And 8 more authors.
Bioresource Technology | Year: 2010

ZrO2 supported La2O3 catalyst prepared by impregnation method was examined in the transesterification reaction of sunflower oil with methanol to produce biodiesel. It was found that the catalyst with 21 wt% loaded La2O3 and calcined at 600 °C showed the optimum activity. The basic property of the catalyst was studied by CO2-TPD, and the results showed that the fatty acid methyl ester (FAME) yield was related to their basicity. The catalyst was also characterized by TG-DTA, XRD, FTIR, SEM and TEM, and the mechanism for the formation of basic sites was discussed. It was also found that the crystallite size of support ZrO2 decreased by loading of La2O3, and the model of the solid-state reaction on the surface of La2O3/ZrO2 catalyst was proposed. Besides, the influence of various reaction variables on the conversion was investigated. © 2009 Elsevier Ltd. All rights reserved.


Feng G.,Zhejiang University | Feng G.,Key Laboratory of Applied Chemistry of Zhejiang Province | Liu Z.,Zhejiang University | Liu Z.,Key Laboratory of Applied Chemistry of Zhejiang Province | And 4 more authors.
RSC Advances | Year: 2014

Solvents play a pivotal role in many chemical reactions as well as in upgrading of pyrolysis bio-oil. Herein we report a systematic study of the effects of solvents such as water, methanol, ethanol, propanol, butanol, acetone, ethyl acetate, tetrahydrofuran and hexane on hydrogenation of a lignin-derived component of pyrolysis bio-oil, phenol, over activated carbon supported palladium catalysts. The solvents were classified into four groups so as to better understand the effect of them. For hydrogen bond donor-hydrogen bond acceptor (HBD-HBA) solvents and hydrogen bond acceptor (HBA) solvents, the conversion of phenol decreased with increasing polarity/polarizability π∗. Phenol was converted completely in hexane or water at 250 °C. However, in methanol or ethanol, it was converted partially. Synergistic action of multiple factors had an effect on the hydrogenation of phenol. To convert phenol better, water and hexane as solvents were excellent in upgrading of pyrolysis bio-oil. This journal is © the Partner Organisations 2014.


Feng G.,Zhejiang University | Feng G.,Key Laboratory of Applied Chemistry of Zhejiang Province | Chen P.,Zhejiang University | Chen P.,Key Laboratory of Applied Chemistry of Zhejiang Province | And 2 more authors.
Catalysis Science and Technology | Year: 2015

Phenol is an important component of pyrolysis bio-oil, especially from lignin, and the conversion of phenol is crucial for the production of biofuel. A cost-effective and efficient catalyst is worth developing in the hydrogenation of phenol. Herein we report that supported palladium nanoparticles on carbon-nitrogen composites with high surface area are highly active for aqueous-phase hydrogenation of phenol. The conversion of phenol was 91.7% within 1 h at 80 °C. Higher activity was achieved at higher temperature. The synergy between palladium nanoparticles and the carbon-nitrogen composite support accelerated the hydrogenation of phenol, which clarified the crucial role played by the support. The hydrogenation of phenol highlights the potential of these catalysts for upgrading bio-oil. © The Royal Society of Chemistry 2015.


Sun H.,Zhejiang University | Sun H.,Key Laboratory of Applied Chemistry of Zhejiang Province | Han J.,Zhejiang University | Han J.,Key Laboratory of Applied Chemistry of Zhejiang Province | And 12 more authors.
Applied Catalysis A: General | Year: 2010

A series of Ca/SBA-15 samples with Ca/Si atomic ratios of 0.1, 0.2, 0.3, 0.4 and 0.5 were prepared by using a one-pot synthesis method. They were used in the transesterification of sunflower oil with methanol. For comparison, 0.3Ca/SBA-15 was also synthesized by an incipient impregnation method (0.3Ca/SBA-15-IM). Small-angle XRD, N2 adsorption, TEM, SEM, TG-DTA, FTIR, CO2-TPD techniques were used to determine the textual structure and physicochemical properties of Ca/SBA-15 samples. The mesoporous structure of SBA-15 was well preserved with Ca/Si ratios up to 0.5. Compared with 0.3Ca/SBA-15-IM sample, the Ca/SBA-15 showed not only a better calcium species distribution, but also higher BET surface area and larger medium basic sites. A biodiesel yield of as high as 99.1% was achieved on the 0.5Ca/SBA-15 catalyst at a reaction temperature of 200 °C for 8 h. In the meantime, no deactivation was found after five cycles on Ca/SBA-15 sample prepared by one-pot synthesis method in the transesterification reaction, which showed a much better stability than that of prepared by conventional impregnation method. Besides, a water content of up to 5% and/or free fatty acids (FFAs) content of 3% did not affect the catalytic activity of Ca/SBA-15 catalyst in the transesterification reaction. © 2010 Elsevier B.V.

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