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In situ biosynthesis of bacterial cellulose hydrogel spheroids with tunable dimensions

Journal of Bioresources and Bioproducts 2024年第1期9卷 90-101页

作者： Bianjing Sun Ping Wang Jingang Zhang Jianbin Lin Lingling Sun Xiaokun Wang Chuntao Chen Dongping Sun institute of Chemicobiology and Functional Materials School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094China zhonghao chenguang chemical research institute Co. Ltd.Zigong 643201China

Bacterial cellulose(BC)hydrogel spheroid plays a significant role in diverse fields due to its spatial 3D structure and *** the present work,a series of BC spheroids with controllable size and shape was obtained via an in situ *** factors for fabricating BC spheroid in-cluding inoculum concentration of 1.35×10^(3)CFU/mL,shaking speeds at 100 r/min,and 48-96 h incubation time during the biosynthetic process,were comprehensively *** operable mechanism model for tuning the size of BC spheroids from 0.4 to 5.0 mm was proposed with a fresh feeding medium strategy of dynamic *** resulting BC spheroids exhibit an inter-active 3D network of nanofibers,a crystallinity index of 72.3%,a specific surface area of 91.2 m^(2)/g,and good *** study reinforces the understanding of BC spheroid forma-tion and explores new horizons for the design of BC spheroids-derived functional matrix materials for medical care.

关键词： In situ biosynthesis Bacterial cellulose Hydrogel Spheroid Tunable dimension

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Recent catalytic syntheses of trifluoromethylthio-containing organic compounds by transition metals,chiral organocatalysts,and photocatalysts

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Chinese chemical Letters 2017年第4期28卷 719-728页

作者： Yong Guo Mei-Wei Huang Xiao-Lin Fu Chao Liu Qing-Yun Chen Zhi-Gang Zhao Ben-Zhong Zeng Jiong Chen Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China College of Chemistry and Environment Protection Engineering Southwest University for Nationalities Chengdu 610041 China zhonghao chenguang research institute of chemical industry Zigong 643201 China

This review summarizes the recent advances in the catalytic syntheses of CFS-containing organic molecules using various nucleophilic or electrophilic trifluoromethylthiolating reagents.C-halogen and C—H bonds in various molecules have been transformed to C—SCFbonds by transition-metal-catalyzed reactions,such as cross-coupling of aryl *** reactions controlled by chiral metal complexes or chiral organocatalysts have afforded many trifluoromethylthiolated chiral architectures,such as β-ketoesters and *** recently,visible-light-induced photoredox trifluoromethylthiolations have been developed,providing versatile CFS-containing structures efficiently.

关键词： Trifluoromethylthiolation Catalysis Transition metal Chiral Photoredox

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High-purity helical carbon nanotubes by trace-water- assisted chemical vapor deposition： Large-scale synthesis and growth mechanism

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Nano research 2018年第6期11卷 3327-3339页

作者： Fanbin Meng Ying Wang Qiang Wang Xiaoling Xu Man Jiang Xuesong Zhou Ping He Zuowan Zhou Key Laboratory of Advanced Technologies of Materials (Ministry of Education) School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 China zhonghao Heiyuan research institute of chemical industry Zigong 643201 China

Helical carbon nanotubes （HCNTs） are highly desirable due to their unique geometrical elegance and inherent physical properties; however, high-efficiency synthesis of high-purity HCNTs with high yield and full elucidation of their growth mechanism remains challenging. Traditional methods to achieve the high-yield growth of HCNTs mainly focus on controlling the size of catalytic particles. Herein, we found that addition of trace water greatly benefits large-scale synthesis of HCNTs. Uniform HCNTs with - 100% purity can be obtained, and the yield of HCNTs can reach ~ 8,078% in a run of 6 h, much higher than that obtained without trace water and any of the reported yields. Experiments and theoretical simulations are performed to reveal that the trace water can react with the dangling bond on carbon, thus inhibiting the generation of amorphous species. Furthermore, the trace water can enhance the anisotropy of the catalyst surface. This results in different segregation rates of carbon atoms coming out of different crystal planes and further periodic mismatch of the graphite layers, thus leading to the formation of HCNTs. Therefore, this new and efficient method is promising for practical, large-scale production of HCNTs.

关键词： helical carbon nanotubes trace water assist high yield and purity first-principles study growth mechanism

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Applied catalysis for sustainable development of chemical industry in China

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National Science Review 2015年第2期2卷 167-182页

作者： Zaiku Xie Zhicheng Liu Yangdong Wang zhonghao Jin China Petroleum & chemical Corporation Sinopec Shanghai research institute of Petrochemical Technology

Progressing green chemical technologies is signiicant to the sustainable development of chemical industry in China, as the energy and environment problems increasingly became great challenges to the whole society. he scientiic connotation of sustainable energy chemical engineering can be generalized as green carbon/hydrogen science which means optimization of carbon/hydrogen atom economics based on high eicient catalysis and low-carbon emission. his review illustrated recent advances in developing sustainable technologies for applied catalysis in chemical industry of China, including the ields of high eicient conversion of heavy oil, green petrochemical catalytic technologies, clean utilization of coal and natural gas, promoting sustainable resources and clean energy, etc. Moreover, from the view of industrial point, some important common scientiic problems were discussed and summarized, such as the relation between molecular difusion and catalyzing eiciency, homogeneous catalysis in heterogeneous catalysts,in situ or operando characterization of industrial catalysis, etc., aiming to supplying a forward roadmap to academia and/or industry.

关键词： applied catalysis catalytic eiciency green carbon/hydrogen science green petrochemical technology coal chemical technology bioma

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Synthesis of Special Morphology ZnO Materials and the Performance for Reaction Adsorption Desulfurization of Thiophene

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应用物理前沿（中英文版） 2013年第1期1卷 9-15页

作者： Jingcheng Zhang Jun Nan Zhangyong Liu Haibin Yu Shan Geng Yulin Shi Xiaolong Qu chenguang Liu Hongguang Liu CNOOC Tianjin chemical research & Design institute Tianjin 300131 China Shandong Zhonghai chemical industry Co. Ltd China State Key Laboratory of Heavy Oil Processing China University of Petroleum Qingdao 266555 China

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Focus on the Chinese revolution of catalysis based on catalytic solutions for the vital demands of society and economy

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Chinese Journal of Catalysis 2018年第7期39卷 1147-1156页

作者： Yangdong Wang Jing Shi zhonghao Jin Zaiku Xie State Key Laboratory of Green chemical Engineering and Industrial Catalysis SINOPEC Shanghai Research Institute of Petrochemical TechnologyShanghai 201208China China Petroleum ＆ chemical Corporation Beijing 100027China

Catalysis is one of the most cross-cutting technologies in the chemical industry, intensely influenc-ing our daily society. Its practical application is closely related to the engineering disciplines. At present, the academic and industrial research on catalysis in our country has made great break-throughs in fields like hydrocarbon production, oil-quality upgrading processes, green chemical engineering, and other energy and chemical users of catalysis. In this paper, we attempt to summa-rize the industrial catalysis achievements and present a discussion on the direction and the devel-opment strategy for catalysis, based on economic and social demands.

关键词： Catalysis Industrialization Hydrocarbon production Green technology Catalytic development

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