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5篇 您的检索式:作者名="Qingda An"
    题名 作者 年代 出处 被引量
1Enzymatic synthesis of ascorbyl palmitate by transesterification in non-aqueous medium显示文摘An Qingda DONG Xiaoli WANG Shao MA Jinhui 2001HECHENG HUAXUE2001,9,2:1
2Pb(II) removal of Fe 3 O 4 @SiO 2 –NH 2 core–shell nanomaterials prepared via a controllable sol–gel process显示文摘Jianming Zhang Shangru Zhai Shi Li Zuoyi Xiao Yu Song Qingda An Ge Tian 2013Chemical Engineering Journal2013,,:1
3Optical absorption and photoluminescence in Sm 3+ - and Eu 3+ -doped rare-earth borate glasses显示文摘Hai Lin Dianlai Yang Guishan Liu Tiecheng Ma Bin Zhai Qingda An Jiayou Yu Xiaojun Wang Xingren Liu Edwin Yue-Bun Pun 2004Journal of Luminescence2004,,1:1
4Hydrogen bond promoted thermal stability enhancement of acetate based ionic liquid显示文摘Acetate-based imidazolium ionic liquids(ILs)are of great importance and widely applied in biomass processing and engineering but under stability issue due to the structure self–rearrangement induced by C2–H deprotonation,by which the IL based biomass processing will be challenging.Herein,we demonstrated that the thermal stability of normal acetate-based imidazolim[C8C1Im][OAc]could be significantly improved by changing its cation and anion environment with the presence of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide IL([C4C1Im][NTf2]).When the molar fraction of[C8C1Im][OAc]was 0.3,the thermal stability of[C8C1Im][OAc]could be significantly improved(ΔT5%dec=+43°C).Detailed information obtained from thermal gravimetric analysis(TGA)and nuclear magnetic resonance(NMR)revealed that the addition of[C4C1 Im][NTf2]played a significant role in enhancing the thermal stability of[C8C1Im][OAc].It was proposed that the formation of an anion–π+structure network between[C8C1 Im][OAc]and[C4C1Im][NTf2]via strong hydrogen bond interactions greatly affects the environment of hydrogen atom in the imidazolium ring of each IL.Ling Zhang Ligang Wei Shangru Zhai Dingwei Zhao Jian Sun Qingda An 2020Chinese Journal of Chemical Engineering2020,28,5:1
5Effects of formaldehyde on fermentable sugars production in the low-cost pretreatment of corn stalk based on ionic liquids显示文摘Low cost processing of lignocellulosic biomass is of great importance for sustainable chemistry and engineering.Herein,a low cost system composed of 1-butyl-3-methylimidazolium chloride([C_(4)C_(1) im]Cl),HCl and formaldehyde(FA)was developed for the pretreatment of corn stalk at 80℃.The efficiency of this technology was compared with that in dioxane system or without FA addition.Due to FA stabilization,the extent of acid-hydrolysis of carbohydrate fraction can be significantly decreased while 70%above of lignin was removed with the pretreatment of[C_(4)C_(1) im]Cl/HCl/FA system at 80℃for 2 h.A maximum reducing sugar yield of 93.7%and glucose concentration of 7.0 mg·ml^(-1) were subsequently obtained from enzymatic hydrolysis of the slurry.There were great differences in compositions of small molecule degraded products obtained with FA addition or not.The present[C_(4)C_(1) im]C_(l) based system exhibits great potential of substituting volatile organic solvents(i.e.dioxane)in developing low cost lignocellulosic biomass pretreatment at low temperature.Also,this work would gain insight into understanding on the roles of stabilization methods on the economic improvement of IL based biomass processing.Kaili Zhang Ligang Wei Qingqin Sun Jian Sun Kunlan Li Shangru Zhai Qingda An Junwang Zhang 2022Chinese Journal of Chemical Engineering2022,35,2:0
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