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Adsorption of CO2 and H2 on Nitrogen-doped Porous Carbon from Ionic Liquid Precursor

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Chemical Research in Chinese Universities 2015年第1期31卷 130-137页

作者： ZHANG Lingna cai kun ZHANG Feng YUE Qunfeng College of Chemistry and Chemical Engineering Harbin Normal University Harbin 150025 P. R. China

Nitrogen-doped mesoporous carbon material was prepared via a simple one-step thermolysis method via the carbonization of ionic liquid, 1-cyanomethyl-3-methylimidazolium bis（trifluoromethylsulfonyl）imide （[MCNIm]^＋[Nf2T]^-）. The nanostructure of the resultant carbon material was characterized by X-ray diffraction（XRD） and transmission electron microscopy（TEM） and the types of N-containing groups of the carbon material were investigated by X-ray photoelectron spectroscopy（XPS）. The N-content of the carbon material is 18.6%（mass fraction） based on the elemental analysis. The produced mesoporous carbon material was further used as the solid sorbent for H2 and CO2. The hydrogen uptake capacity and H2 isosteric heat of the carbon material were discussed. Furthermore, the nitrogen-containing carbon material as good sorbent shows relatively high adsorption and separation ability for CO2 from CH4, for which the heat of CO2 adsorption（Qst） is 31.8 kJ/mol. The mesoporous structure and nitrogen functionality make the carbon material with high adsorption capacity and selectivity for CO2 and ability to store Ha, indicating that this kind of nitrogen-doped carbon material originated from ionic liquids is a promising sorbent material for high-performance separation and adsorption.

关键词： Nitrogen-doped mesoporous carbon Ionic liquid Gas adsorption

Silicon-Mediated Amelioration of Fe^(2+) Toxicity in Rice (Oryza sativa L.) Roots

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Pedosphere 2012年第6期22卷 795-802页

作者： FU You-Qiang SHEN Hong WU Dao-Ming cai kun-Zheng College of Resources and Environment South China Agricultural UniversityGuangzhou 510642(China) College of Agronomy South China Agricultural UniversityGuangzhou 510642(China)

Silicon (Si) can enhance the resistance of plants to many abiotic stresses. To explore whether Si ameliorates Fe2+ toxicity, a hydroponic experiment was performed to investigate whether and how Si detoxifies Fe2+ toxicity in rice (Oryza sativa L.) roots. Results indicated that rice cultivar Tianyou 998 (TY998) showed greater sensitivity to Fe2+ toxicity than rice cultivar Peizataifeng (PZTF). Treatment with 0.1 mmol L-1 Fe2+ inhibited TY998 root elongation and root biomass significantly. Reddish iron plaque was formed on root surface of both cultivars. TY998 had a higher amount of iron plaque than PZTF. Addition of Si to the solution of Fe treatment decreased the amount of iron plaque on root surface by 17.6% to 37.1% and iron uptake in rice roots by 37.0% to 40.3%, and subsequently restored root elongation triggered by Fe2+ toxicity by 13.5% in the TY998. Compared with Fe treatment, the addition of 1 mmol L-1 Si to the solution of Fe treatment increased xylem sap flow by 19.3% to 24.8% and root-shoot Fe transportation by 45.0% to 78.6%. Furthermore, Si addition to the solution of Fe treatment induced root cell wall to thicken. These results suggested that Si could detoxify Fe2+ toxicity and Si-mediated amelioration of Fe2+ toxicity in rice roots was associated with less iron plaque on root surface and more Fe transportation from roots to shoots.

关键词： cell wall Fe transportation iron plaque xylem sap

Wheat straw biochar amendment suppresses tomato bacterial wilt caused by Ralstonia solanacearum: Potential effects of rhizosphere organic acids and amino acids

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Journal of Integrative Agriculture 2021年第9期20卷 2450-2462页

作者： TIAN Ji-hui RAO Shuang GAO Yang LU Yang cai kun-zheng Guangdong Provincial Key Laboratory of Eco-Circular Agriculture South China Agricultural UniversityGuangzhou 510642P.R.China College of Natural Resources and Environment South China Agricultural UniversityGuangzhou 510642P.R.China Key Laboratory of Tropical Agro-Environment Ministry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642P.R.China

Complex interactions based on host plant, rhizosphere microorganisms and soil microenvironment are presumed to be responsible for the suppressive properties of biochar against soil-borne diseases, although the underlying mechanisms are not well understood. This study is designed to evaluate the efficacy of biochar amendment for controlling tomato bacterial wilt caused by Ralstonia solanacearum, and to explore the interactions between biochar-induced changes in rhizosphere compound composition, the pathogen and tomato growth. The results showed that biochar amendment decreased disease incidence by 61–78% and simultaneously improved plant growth. The positive ‘biochar effect' could be associated with enhanced microbial activity and alterations in the rhizosphere organic acid and amino acid composition. Specifically, elevated rhizosphere citric acid and lysine, but reduced salicylic acid, were induced by biochar which improved microbial activity and rendered the rhizosphere unsuitable for the development of R. solanacearum. In addition, nutrients which were either made more available by the stimulated microbial activity or supplied by the biochar could improve plant vigor and potentially enhance tomato resistance to diseases. Our findings highlight that biochar's ability to control tomato bacterial wilt could be associated with the alteration of the rhizosphere organic acid and amino acid composition, however, further research is required to verify these ‘biochar effects' in field conditions.

关键词： rhizosphere compounds microbial activity citric acid lysine salicylic acid

Memristive behaviors in Ag2S nano-particles assembly

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Memristive behaviors in Ag2S nano-particles assembly

Multipolar Structure of Equilibrium Shear Flow Field in Toroidal Plasmas

第八届中国功能材料及其应用学术会议

作者： WU Hong-ya cai kun-peng ZHOU Ji State key laboratory of new ceramic and fine processing School of materials science and engineeringTsinghua University Advanced Materials Institute Shenzhen Graduate SchoolTsinghua University

A memristive phenomenon was observed in bulk silver sulfide(Ag

ISBN: (纸本)9783037859698

A memristive phenomenon was observed in bulk silver sulfide(Ag

关键词： Memristive Silver sulfide Electrochemical

来源： cnki会议评论

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Communications in Theoretical Physics 2019年第1期71卷 91-96页

作者： Liu-Xiu He Ming-Hai Liu Hua-kun cai School of Physics Huazhong University of Science and Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electric Engineering Huazhong University of Science and Technology

The multipolar velocity field structures are investigated by 2D momentum conservation equation with 3D equilibrium sheared flows in the full toroidal system. Numerical results show that the non-existence of radial velocity field in equilibrium surfaces is suitable only for the zero-order term of our 2D simulation. The non-zero-order radial velocity field is still preserved, even when converted to conventional magnetic surface coordinates. The distribution of velocity field vectors of the order of 1, 2, and 3 are presented respectively in 2, 4, and 6 polar fields with the local vortex structure. The excitation mechanisms of these velocity vortices are the coupling effects of the magneto-fluid structure patterns and the toroidal effects. These results can help us understand the complexity of core physics, the transverse transport across magnetic field by the radial plasma flow and the formation of velocity vortices.

关键词： equilibrium shear flow multipolar field vortex structure

High Performance Micro CO Sensors Based on ZnO-SnO_(2) Composite Nanofibers with Anti-Humidity Characteristics

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Chinese Physics Letters 2012年第12期29卷 44-47页

作者： YUE Xue-Jun HONG Tian-Sheng XIANG Wei cai kun XU Xing Key Laboratory of Key Technology on Agricultural Machine and Equipment(Ministry of Education) Engineering CollegeSouth China Agricultural UniversityGuangzhou 5106422Faculty of Engineering and SurveyingUniversity of Southern QueenslandToowoomba QLD 4350Australia

ZnO-SnO_(2) composite nanofibers are synthesized via an electrospinning method and characterized by x-ray diffraction,scanning electron microscopy,and transmission electron *** sensors are fabricated by spinning the nanofibers on Si substrates with Pt signal and heater *** sensors with small areas(600μm×200μm)can detect CO down to 1 ppm at 360℃.The corresponding sensitivity,response time,and recovery time are 3.2,6 s,and 11 s,***,the sensors can operate at high humidity *** sensitivity only decreases to 2.3 when the sensors are exposed to 1 ppm CO at 95%relative *** excellent sensing properties are due to combining the benefits of one-dimensional nanomaterials and the ZnO-SnO_(2) grain boundary in the nanofibers.

关键词： fibers composite humidity

Physiological response and phenolic metabolism in tomato (Solanum lycopersicum) mediated by silicon under Ralstonia solanacearum infection

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Journal of Integrative Agriculture 2018年第10期17卷 2160-2171页

作者： FAN Xue-ying LIN Wei-peng LIU Rui JIANG Ni-hao cai kun-zheng College of Natural Resources and Environment/Key Laboratory of Tropical Agro-environment Ministry of Agriculture South China Agricultural University Laboratory of Ecotoxicity and Environmental Safety Guangdong Detection Center of Microbiology Guangdong Institute of Microbiology Tea Research Institute Guangdong Academy of Agricultural Sciences

Bacterial wilt, caused by Ralstonia solanacearum（Rs） is a serious soil-borne disease and silicon can enhance tomato resistance against this disease. However, few studies have focused on the mechanisms of Si-mediated pathogen resistance from the rhizosphere perspective. In this study, two tomato genotypes, HYT（susceptible） and H7996（resistant）, were used to investigate the effects of silicon application on disease inhibition, root growth, and organic acid content in both roots and root exudates under R. solanacearum infection. The results showed that Si application significantly suppressed bacterial wilt in HYT, but had no effect in H7996. Silicon concentrations in roots, stems and leaves of tomato were significantly increased by Si treatment under R. solanacearum inoculation. In HYT, Si application increased root dry weight by 22.8-51.6% and leaf photosynthesis by 30.6-208.0%, and reduced the concentrations of citric acid in root exudates by 71.4% and in roots by 83.5%. However, organic acids did not influence R. solanacearum growth. Results also demonstrated that salicylic acid（SA） content in roots was significantly increased by silicon addition for H7996 and exogenous SA application could reduce bacterial wilt disease index. Collectively, these results suggest that Si-modulated phenolic compound metabolism in roots or root exudates, especially citric acid and SA, may be a potential mechanism in the amelioration of bacterial wilt disease by Si.

关键词： silicon root root exudates Solanum lycopersicum Ralstonia solanacearum organic acids

Unusual thermal properties of graphene origami crease:A molecular dynamics study

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Green Energy & Environment 2022年第1期7卷 86-94页

作者： Ning Wei Yang Chen kun cai Yingyan Zhang Qingxiang Pei Jin-Cheng Zheng Yiu-Wing Mai Junhua Zhao Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology Jiangnan UniversityWuxi214122China Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringShanghai UniversityShanghai200072China School of Engineering RMIT UniversityBundooraVIC3083Australia Institute of High Performance Computing A^(*)STAR138632Singapore Department of Physics and the Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices Xiamen UniversityXiamen361005China Xiamen University Malaysia 439000SepangSelangorMalaysia Centre for Advanced Materials Technology(CAMT) School of AerospaceMechanical and Mechatronic Engineering J07The University of SydneySydneyNSW2006Australia

Graphene is a two-dimensional material that can be folded into diverse and yet interesting nanostructures like macro-scale paper *** of graphene not only makes different morphological configurations but also modifies their mechanical and thermal *** by paper origami,herein we studied systemically the effects of creases,where sp^(2)to sp^(3)bond transformation occurs,on the thermal properties of graphene origami using molecular dynamics(MD)*** MD simulation results show that tensile strain reduces(not increases)the interfacial thermal resistance owing to the presence of the *** unusual phenomenon is explained by the micro-heat flux migration and stress *** findings on the graphene origami enable the design of the next-generation thermal management devices and flexible electronics with tuneable properties.

关键词： Graphene Origami Bond transformation Interfacial thermal resistance Molecular dynamics

Evaluation of specific fecal protein biochips for the diagnosis of colorectal cancer

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World Journal of Gastroenterology 2014年第5期20卷 1332-1339页

作者： Hui-Peng Wang Yang-Yun Wang Jie Pan Rong Cen Yuan-kun cai Department of General Surgery The 5thPeople’s Hospital of Shanghai Fudan University Department of endoscopy Shanghai Shuguang Hospital Shanghai University of Traditional Chinese Medicine

AIM: To develop and initially test a potential fecal protein biochip for the screening of colorectal cancer (CRC).

关键词： Protein biochip Feces Colorectal cancer Fibroblast growth factor-23 Thrombopoietin