Documents disponibles écrits par cet auteur

Highly sensitive and selective alcohol sensors based on ag-doped In2 O3 coating / Yidong Zhang in Industrial & engineering chemistry research, Vol. 49 N° 8 (Avril 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 8 (Avril 2010) . - pp. 3539-3543 Titre : Highly sensitive and selective alcohol sensors based on ag-doped In2 O3 coating Type de document : texte imprimé Auteurs : Yidong Zhang, Auteur ; Zhi Zheng, Auteur ; Fengling Yang, Auteur Année de publication : 2010 Article en page(s) : pp. 3539-3543 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Alcohol  Sensors  Ag-Doped  In2  O3  Coating Résumé : In this paper, we describe how to synthesize Ag-doped In2O3 nano particles and fabricate highly sensitive and selective alcohol sensors by solid-state reaction treatment from In(NO3)3·5H2O and AgNO3 mixtures at room temperature followed by calcination at 600 °C for 2 h. The samples were characterized by X-ray diffraction, scanning electronic microscopy, X-ray photoelectron spectroscopy. The diameter of the as-synthesized particle diameter is 80 nm under different dosage of Ag doping. In comparison with pure In2O3 sensor, all of the Ag-doped sensors showed better sensing performance in sensitivity, selectivity and optimum operating temperature. The effects of Ag content, alcohol vapor concentration, and operating temperature on the sensing characteristics of the Ag-doped In2O3 sensors were also investigated. We found that the Ag-doped sensor containing 10.0 mol % Ag exhibited the maximum sensitivity to alcohol vapor at 150 °C. A possible mechanism for the influence of Ag on the alcohol-sensing properties of Ag-doped In2O3 sensors was proposed. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100197b?prevSearch=Highly%2Bsensitive%2Ban [...] [article] Highly sensitive and selective alcohol sensors based on ag-doped In2 O3 coating [texte imprimé] / Yidong Zhang, Auteur ; Zhi Zheng, Auteur ; Fengling Yang, Auteur . - 2010 . - pp. 3539-3543. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 8 (Avril 2010) . - pp. 3539-3543 Mots-clés : Alcohol  Sensors  Ag-Doped  In2  O3  Coating Résumé : In this paper, we describe how to synthesize Ag-doped In2O3 nano particles and fabricate highly sensitive and selective alcohol sensors by solid-state reaction treatment from In(NO3)3·5H2O and AgNO3 mixtures at room temperature followed by calcination at 600 °C for 2 h. The samples were characterized by X-ray diffraction, scanning electronic microscopy, X-ray photoelectron spectroscopy. The diameter of the as-synthesized particle diameter is 80 nm under different dosage of Ag doping. In comparison with pure In2O3 sensor, all of the Ag-doped sensors showed better sensing performance in sensitivity, selectivity and optimum operating temperature. The effects of Ag content, alcohol vapor concentration, and operating temperature on the sensing characteristics of the Ag-doped In2O3 sensors were also investigated. We found that the Ag-doped sensor containing 10.0 mol % Ag exhibited the maximum sensitivity to alcohol vapor at 150 °C. A possible mechanism for the influence of Ag on the alcohol-sensing properties of Ag-doped In2O3 sensors was proposed. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100197b?prevSearch=Highly%2Bsensitive%2Ban [...]

Novel process for 1 , 3 - dihydroxyacetone production from glycerol. 1. / Zhi Zheng in Industrial & engineering chemistry research, Vol. 51 N° 9 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3715-3721 Titre : Novel process for 1 , 3 - dihydroxyacetone production from glycerol. 1. : Technological feasibility study and process design Type de document : texte imprimé Auteurs : Zhi Zheng, Auteur ; Min Luo, Auteur ; Jianer Yu, Auteur Année de publication : 2012 Article en page(s) : pp. 3715-3721 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Design  Production Résumé : A novel and efficient conversion process of glycerol to 1,3-dihydroxyacetone (DHA) via indirect oxidation was developed. The idea is to oxidize the middle hydroxyl group of glycerol to a carbonyl group with the help of a group protection technique, and then the protection reagent is removed by hydrolysis. With this new process, the conversion is conducted in three steps, namely, acetalization, oxidation, and hydrolysis. The oxidation step is the focus of this conversion process. In our work, three oxidant systems (CrO3 anion resin oxidant system, TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl)/NaBr/NaClO system, and TEMPO/NaBr/Air system) were experimentally examined to verify the feasibility of this new process. The process of this conversion is also preliminarily designed on the basis of the laboratory procedure described in the experimental section, which offers a potential foundation for the large-scale production of DHA from glycerol. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25595800 [article] Novel process for 1 , 3 - dihydroxyacetone production from glycerol. 1. : Technological feasibility study and process design [texte imprimé] / Zhi Zheng, Auteur ; Min Luo, Auteur ; Jianer Yu, Auteur . - 2012 . - pp. 3715-3721. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3715-3721 Mots-clés : Design  Production Résumé : A novel and efficient conversion process of glycerol to 1,3-dihydroxyacetone (DHA) via indirect oxidation was developed. The idea is to oxidize the middle hydroxyl group of glycerol to a carbonyl group with the help of a group protection technique, and then the protection reagent is removed by hydrolysis. With this new process, the conversion is conducted in three steps, namely, acetalization, oxidation, and hydrolysis. The oxidation step is the focus of this conversion process. In our work, three oxidant systems (CrO3 anion resin oxidant system, TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl)/NaBr/NaClO system, and TEMPO/NaBr/Air system) were experimentally examined to verify the feasibility of this new process. The process of this conversion is also preliminarily designed on the basis of the laboratory procedure described in the experimental section, which offers a potential foundation for the large-scale production of DHA from glycerol. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25595800