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International Journal of Minerals,Metallurgy and Materials 2012年第1期19卷 9-14页

作者： Yu-min Liu Hua Lv Tao Qi Yi Zhang College of Chemistry and environmental science Henan Normal University Xinxiang 453007 China Institute of Process engineering Chinese Academy of Sciences Beijing 100080 China

To effectively utilize ilmenite and recycle KOH solution, the extraction behaviours of titanium and other associated impurities in the decomposition process of ilmenite by highly concentrated KOH solution were studied. Experiments on the extraction behaviours of tita- nium as well as other associated impurities of ilmenite such as iron, silicon, calcium, and aluminium were carried out. The effects of various parameters, including reaction temperature, KOH concentration, reaction time, alkali-to-ore mass ratio, and particle size on the extraction rate of titanium and other impurities were examined. When the finely ground ore （58-75 ~tm） reacted with KOH solution （80wt%） in an al- kali-to-ore mass ratio of 7：1 at 260~C for 60 min, almost complete extraction of titanium was achieved, while the extraction rate of aluminium was 78% and that of other impurities was less than 22%. Moreover, high purity （98.2wt%） TiO2 with the anatase structure could be gained in the purification process.

关键词： ilmenite titanium dioxide potassium hydroxide leaching

Development of flexible Li-ion batteries for flexible electronics

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InfoMat 2020年第5期2卷 866-878页

作者： Yifan Zhao Juchen Guo Materials science and engineering Program University of California–RiversideRiversideCalifornia Department of Chemical and environmental engineering University of California–RiversideRiversideCalifornia

We provide a critical review on the recent development of flexible lithium-ion batteries(FLIBs)for flexible electronic *** innovative designs of cell configuration for bendable and stretchable FLIBs,selection of active materials,and evaluation methods for FLIBs are *** grand challenges for FLIBs are energy density and scale-up fabrication as demonstrated in the ***,the lack of quantitative evaluation methods for FLIBs'performance and nondestructive tools to probe the mechanical degradation may significantly hinder the development of FLIB *** for future research directions,based on the current state of progress,are discussed.

关键词： flexible electronic devices flexible Li-ion batteries nondestructive probe

In situ integration of efficient photocatalyst Cu1.8S/ZnxCd1-xS heterojunction derived from a metal-organic framework

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Chinese Chemical Letters 2020年第10期31卷 2795-2798页

作者： Dongpeng Zhang Pengfei Wang Fangyuan Chen Kelei Mu Yi Li Haitao Wang Zhijun Ren Sihui Zhan MOE Key Laboratory of Pollution Processes and environmental Criteria/Tianjin Key Laboratory of environmental Remediation and Pollution Control College of Environmental Science and EngineeringNankai UniversityTianjin 300350China School of Energy and environmental engineering Hebei University of TechnologyTianjin 300401China Department of Chemistry Tianjin UniversityTianjin 300072China

The development of photocatalysts for hydrogen evolution is a promising alternative to industrial hydrogen evolution;however,generation of high active,recyclable,inexpensive heterojunctions are still ***,a novel strategy was developed to synthesize non-noble metal co-catalyst/solid solution heterojunctions using metal-organic frameworks(MOFs)as a precursor *** adjusting the content of MOFs,a series of Cu1.8S/ZnxCd1-xS heterojunctions were obtained,and the Cu1.8S(3.7%)/Zn0.35Cd0.65S sample exhibits a maximum hydrogen evolution rate of 14.27 mmol h^(-1) g^(-1) with an apparent quantum yield of 3.7%at 420 nm under visible-light ***,the relationship between the heterojunction and photocatalytic activity were investigated by detailed characterizations and density functional theory(DFT)calculations,which reveal that loading Cu1.8S can efficiently extend the light absorption,meanwhile,the electrons can efficiently transfer from Zn0.35Cd0.65S to Cu1.8S,thus resulting more photogenerated electrons participating in surface *** result can be valuable inspirations for the exploitation of advanced materials using rationally designed nanostructures for solar energy conversion.

关键词： Co-catalyst Cu1.8S/Zn0.35Cd0.65S Density functional theory(DFT) Charge separation and transfer

Statistical analysis of residential building energy consumption in Tianjin

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Frontiers in Energy 2014年第4期8卷 513-520页

作者： Jihong LING Luhui ZHAO Jincheng XING Zhiqiang LU School of environmental science and engineering Tianjin University Tianjin 300072 China Shanxi Electric Power Exploration & Design Institute of China engineering Group Taiyuan 030000 China

To analyze the effect of energy conservation policies on energy consumption of residential buildings, the characteristics of energy consumption and indoor thermal comfort were investigated in detail in Tianjin, China, based on official statistical yearbook and field survey data. A comprehensive survey of 305 households indicates that the mean electricity consumption per household is 3215kWh/a, in which annual cooling electricity consumption is 344kWh/a, and the mean natural gas consumption for cooking is 103.2m3/a. Analysis of 3966 households data shows that space heating average intensity of residential buildings designed before 1996 is 133.7kWh/（m^2.a）, that of buildings designed between 1996 and 2004 is 117.2 kWh/（m^2.a）, and that of buildings designed after 2004 is 105.0kWh/（m^2.a）. Apparently, enhancing the performance of envelops is effective in reducing space heating intensity. Furthermore, the results of questionnaires show that 18% of the residents feel slightly warm and hot respectively, while 3% feel slightly cold in winter. Therefore, the electricity consumption in summer will rise for meeting indoor thermal comfort.

关键词： residential building survey statistical analy-sis energy conversation energy intensity indoor thermalcomfort

Discharge Characteristics of DC Arc Water Plasma for environmental Applications

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Plasma science and Technology 2012年第12期14卷 1097-1101页

作者：李天明 Sooseok CHOI Takayuki WATANABE Department of environmental Chemistry and engineering Tokyo Institute of Technology

A water plasma was generated by DC arc discharge with a hafnium embedded rodtype cathode and a nozzle-type anode. The discharge characteristics were examined by changing the operation parameter of the arc current. The dynamic behavior of the arc discharge led to significant fluctuations in the arc voltage and its frequency. Analyses of the high speed image and the arc voltage waveform showed that the arc discharge was in the restrike mode and its frequency varied within several tens of kilohertz according to the operating conditions. The larger thermal plasma volume was generated by the higher flow from the forming steam with a higher restrike frequency in the higher arc current conditions. In addition, the characteristics of the water plasma jet were investigated by means of optical emission spectroscopy to identify the abundant radicals required in an efficient waste treatment process.

关键词： thermal plasma water plasma torch arc movement restrike frequency

Optimization Analysis of High Temperature Heat Pump Coupling to Desiccant Wheel Air Conditioning System

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Transactions of Tianjin University 2014年第3期20卷 182-188页

作者：盛颖张于峰房磊聂金哲马丽筠 School of environmental science and engineering Tianjin University International Centre for Indoor Environment and Energy Technical University of Denmark

The high temperature heat pump and desiccant wheel(HTHP&DW) system can make full use of heat released from the condenser of heat pump for DW regeneration without additional heat. In this study, DW operation in the HTHP&DW system was investigated experimentally, and the optimization analysis of HTHP&DW system was carried out. The performance of DW had influence on the dehumidification(evaluated by dehumidification and regeneration effectiveness) and cooling load(evaluated by thermal and adiabatic effectiveness). The results show that the enthalpy increase occurred in all the experiments. Compared to the isosteric heat, heat accumulation in the desiccant and matrix material and heat leakage from regeneration side to process side have greater influence on the adiabatic effectiveness. Higher regeneration temperature leads to lower adiabatic effectiveness that increases more cooling load of the system. When the regeneration temperature is 63℃, the maximal dehumidification effectiveness is 35.4% and the satisfied adiabatic effectiveness is 88%, which contributes to the optimal balance between dehumidification and cooling.

关键词： desiccant wheel dehumidification adiabatic effectiveness performance optimization

Possibility of using strain F9(Serratia marcescens) as a bio-collector for hematite flotation

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International Journal of Minerals,Metallurgy and Materials 2014年第3期21卷 210-215页

作者： Hui-fen Yang Tian Li Yan-hong Chang Hui Luo Qiong-yao Tang Civil and environmental engineering School University of Science and Technology Beijing State Key Laboratory for High-Efficiency Mining and Safety of Metal Mines Ministry of Education

In this study, we characterized strain F9 and evaluated the interaction between strain F9 and hematite by scanning electron microscopy（SEM）, Fourier transform infrared spectrophotometry（FTIR）, zeta potential, flotation, and other methods. The results showed that strain F9 belongs to Serratia marcescens. This brevibacterium had CH2, CH3, and hydroxyl groups on its cell wall, which imparted a strong hydrophobic and negative charge. Adsorption of strain F9 reduced the zeta potential of the hematite surface and increased the hydrophobicity of the hematite surface, thereby generating hydrophobic hematite agglomerates. At least four groups on strain F9 interacted with the hematite surface, which contributed to chemical interactions of carboxylic groups and hydrophobic association among hydrophobic hematite particles. The possible use of strain F9 as a bio-collector for hematite flotation was proved.

关键词： microorganisms Serratia marcescens flotation hydrophobicity hematite

Transformation of triclosan by a novel cold-adapted laccase from Botrytis sp. FQ

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Frontiers of environmental science & engineering 2017年第3期11卷 79-86页

作者： Yuanyuan Shi Deyang Kong Jiayang Liu Junhe Lu Xiaoming Yin Quansuo Zhou College of Resources and environmental science Nanjing Agricultural University Nanjing 210095 China Nanjing Institute of environmental science Ministry of Environmental Protection of PRC Nanjing 210042 China School of Bioengineering Huanghuai University Zhumadian 463000 China

This work investigated the transformation of triclosan （TCS） by the laccase produced by a pathogen isolated from rotten tomato. The pathogen was characterized as Bot^tis sp. FQ, belonging to subphylum Deuteromw＇otina. The laccase exhibited cold-adaptation with relatively high activity at 20℃. The laccase could effectively transform TCS. Approximately 62% TCS could be removed at dose of 1.0 unit·mL^-1 in 120min. The reaction rate appeared to be pseudo-first-order to the concentration of the substrate, suggesting the laccase activity remained stable during the reaction. Transformation products of TCS were analyzed by mass spectrometry and it was revealed that TCS dimers were formed via radical coupling pathways. During this process, laccase catalyzed oxidation of TCS to form a radical intermediate is the rate limiting step. However, this step can be reversed by humic acid. Overall, the laccase showed great potential in the treatment of phenolic contaminants. Since laccase is widely presented in natural environment, this study also revealed an important pathway involved in the transformation of phenolic contaminants in the environment.

关键词： Laccase Botrytis cinerea cinerea Triclosan Transformation Kinetics

Discharge Characteristics of Series Surface/Packed-Bed Discharge Reactor Diven by Bipolar Pulsed Power

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Plasma science and Technology 2016年第3期18卷 254-258页

作者：胡健姜楠李杰商克峰鲁娜吴彦水野彰 Key Laboratory of Industrial Ecology and environmental engineering MOEDalian University of Technology School of environmental science & Technology Dalian University of Technology School of Electrical engineering Dalian University of Technology Department of Environment and Life science Toyohashi University of Technology

The discharge characteristics of the series surface/packed-bed discharge （SSPBD） reactor driven by bipolar pulse power were systemically investigated in this study. In order to evaluate the advantages of the SSPBD reactor, it was compared with traditional surface discharge （SD） reactor and packed-bed discharge （PBD） reactor in terms of the discharge voltage, discharge current, and ozone formation. The SSPBD reactor exhibited a faster rising time and lower tail voltage than the SD and PBD reactors. The distribution of the active species generated in differ- ent discharge regions of the SSPBD reactor was analyzed by optical emission spectra and ozone analysis. It was found that the packed-bed discharge region （3.5 mg/L）, rather than the surface discharge region （1.3 mg/L） in the SSPBD reactor played a more important role in ozone gener- ation. The optical emission spectroscopy analysis indicated that more intense peaks of the active species （e.g. N2 and OI） in the optical emission spectra were observed in the packed-bed region.

关键词： electrical characteristics bipolar pulsed power DBD ozone concentration,optical emission spectra

Structural Feature and Internal Motion of Hyperbranching Cluster System with Low Polydispersity and Featured Pattern in Dilute Solutions

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Chinese Journal of Polymer science 2022年第12期40卷 1515-1521,I0006页

作者： Si-Qi Huang Mo Zhu Jin-Xian Yang Lian-Wei Li College of Chemistry and environmental engineering Shenzhen UniversityShenzhen 518060China Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China

This work reports the structural feature and internal motion of one novel hyperbranching cluster system in dilution *** cluster system is composed of HB-PS_(300)-g-Pt BA_(45) hypergraft copolymer chains with uniform subchain,high molar mass and low polydispersity(M_(w)=1.73×106 g/mol and≈1.07),where HB-PS and Pt BA represent hyperbranched polystyrene core and poly(tert-butyl polyacrylate)graft,*** the selective solvent of PS blocks(cyclohexane,T_(θ)=34.5℃),the aggregation kinetics and structural feature are found to be precisely tunable for assembled clusters by the aggregation temperature(11℃

关键词： Hyperbranching cluster Structural feature Internal motion