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Simultaneous degradation of RhB and reduction of Cr(Ⅵ) by MIL-53(Fe)/Polyaniline(PANI) with the mediation of organic acid

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Chinese Journal of Chemical Engineering 2022年第2期35卷 55-63页

作者： Wanyuan wang Chengxin Wen Daoyuan Zheng Chunhu Li Junjie Bian Xinbo wang Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education Ocean University of ChinaQingdao 266100China School of Environmental Science and Engineering Shandong UniversityQingdao 266237China

MIL-53(Fe)/polyaniline(PANI) composite was prepared by in situ depositing PANI on the surface of MIL-53(Fe) and their catalytic performances on the simultaneous removal of Rh B and Cr(Ⅵ) were investigated. The elimination efficiency of both RhB and Cr(Ⅵ) reached more than 98% under pH = 2 where hydrochloric acid and citric acid were used to adjust the pH. The results indicated that MIL-53(Fe)/PANI revealed an obvious pH response to the degradation of RhB, while citric acid promoted the Cr(Ⅵ)photoreduction. UV–Vis spectra, EIS, and photocurrent response experiments showed that MIL-53(Fe)/PANI had a better light response and carrier migration ability than MIL-53(Fe). The transient absorption spectra also exhibited that the lifetimes of photo-generated carriers were prolonged after the conductive polymer deposition on the MIL-53(Fe) surface. Scavenger experiments demonstrated that the main active species were·O;-and·OH. Combined with activity evaluation results, and the possible photocatalytic mechanism of MIL-53(Fe)/PANI on RhB oxidation and Cr(Ⅵ) reduction was proposed. The addition of conductive polymer can effectively improve the light response of the catalyst under acidic conditions, and meanwhile citric acid also provided a new mediation for the synergistic degradation of multiple pollutants. Good activity and stability of the catalysts made the scale-up purification of acid water feasible under UV–Vis light.

关键词： Photocatalyst MIL-53(Fe) Polyaniline Synergistic effects Cr(Ⅵ)-RhB coexistence system

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Visible-light-driven heterostructured g-C_(3)N_(4)/Bi-TiO_(2) floating photocatalyst with enhanced charge carrier separation for photocatalytic inactivation of Microcystis aeruginosa

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Frontiers of Environmental Science & Engineering 2021年第6期15卷 367-378页

作者： Jingke Song Chenyang Li Xuejiang wang Songsong Zhi Xin wang Jianhui Sun School of Environment Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control(Ministry of Education)Henan Key Laboratory for Environmental Pollution ControlHenan Normal UniversityXinxiang 453007China College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghai 200092China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials Guangdong Engineering Technology Research Center of Efficient Green Energy and Environment Protection MaterialsSchool of Physics and Telecommunication EngineeringSouth China Normal UniversityGuangzhou 510006China

The increase in occurrence and severity of cyanobacteria blooms is causing increasing concern;moreover,human and animal health is affected by the toxic effects of Microcystin-LR released into the *** this paper,a floating photocatalyst for the photocatalytic inactivation of the harmful algae Microcystis aeruginosa(***)was prepared using a simple sol-gel method,i.e.,coating g-C_(3)N_(4) coupled with Bi-doped TiO_(2) on Al_(2)O_(3)-modified expanded perlite(CBTA for short).The impact of different molar ratios of Bi/Ti on CBTA was *** results indicated that Bi doping in TiO_(2) inhibited photogenerated electron-hole pair *** 6 h of visible light illumination,75.9%of ***(initial concentration=2.7106 cells/L)and 83.7%of Microcystin-LR(initial concentration=100μg/L)could be removed with the addition of 2 g/L CBTA1%(i.e.,Bi/Ti molar ratio=1%).The key reactive oxygen species(ROSs)in the photocatalytic inactivation process are h+and*** induction of the Bi^(4+)/Bi^(3+)species by the incorporation of Bi could narrow the bandgap of TiO_(2),trap electrons,and enhance the stability of CBTA-1%in the solutions with coexisting environmental substances.

关键词： Bi doping Visible light Algal removal Charge carrier separation

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Progress on deep circulation and meridional overturning circulation in the South China Sea

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Science China Earth Sciences 2016年第9期59卷 1827-1833页

作者： wang DongXiao XIAO JinGen SHU YeQiang XIE Qiang CHEN Ju wang Qiang State Key Laboratory of Tropical Oceanography South China Sea Institute of Oceanology Chinese Academy of Sciences College of Earth Sciences University of Chinese Academy of Sciences Institute of Deep Sea Science and Engineering Chinese Academy of Sciences

The deep overflow through the Luzon Strait drives the cyclonic deep circulation in the South China Sea(SCS). In the mean time, the intruding Pacific deep water transforms and upwells due to enhanced diapycnal mixing in the SCS. Both processes greatly contribute to the SCS meridional overturning circulation(SCSMOC). At the same time, both the deep circulation and meridional overturning circulation are modulated by rough topography in the SCS. Furthermore, the spatial structure of the SCSMOC infers a link between the upper-layer circulation and deep circulation in the SCS. This paper reviews recent advances in the SCS deep circulation and meridional overturning circulation, including the driving mechanism of the SCS deep circulation and its modulation by topography, as well as the spatial structure of the SCSMOC and its dynamical mechanism.

关键词： Luzon overflow SCS deep circulation SCSMOC Topography

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Coactive design of explainable agent-based task planning and deep reinforcement learning for human-UAVs teamwork

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Chinese Journal of Aeronautics 2020年第11期33卷 2930-2945页

作者： Chang wang Lizhen WU Chao YAN Zhichao wang Han LONG Chao YU College of Intelligence Science and Technology National University of Defense TechnologyChangsha 410073China College of Liberal Arts National University of Defense TechnologyChangsha 410073China School of Data and Computer Science Sun Yat-sen UniversityGuangzhou 510275China

Unmanned Aerial Vehicles(UAVs)are useful in dangerous and dynamic tasks such as search-and-rescue,forest surveillance,and anti-terrorist *** tasks can be solved better through the collaboration of multiple UAVs under human ***,it is still difficult for human to monitor,understand,predict and control the behaviors of the UAVs due to the task complexity as well as the black-box machine learning and planning algorithms being *** this paper,the coactive design method is adopted to analyze the cognitive capabilities required for the tasks and design the interdependencies among the heterogeneous teammates of UAVs or human for coherent ***,an agent-based task planner is proposed to automatically decompose a complex task into a sequence of explainable subtasks under constrains of resources,execution time,social rules and ***,a deep reinforcement learning approach is designed for the UAVs to learn optimal policies of a flocking behavior and a path planner that are easy for the human operator to understand and ***,a mixed-initiative action selection mechanism is used to evaluate the learned policies as well as the human’s *** results demonstrate the effectiveness of the proposed methods.

关键词： Coactive design Deep reinforcement learning Human-robot teamwork Mixed-initiative Multi-agent system Task planning UAV

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Large-scale laboratory study on the evolution lawof temperature fields in the context of underground coal gasification

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Chinese Journal of Chemical Engineering 2020年第12期28卷 3126-3135页

作者： Zhe wang Yongchao Wei Tengfei Hou Yongchuan Jin Cuilan wang Jie Liang School of Chemical and Environmental Engineering China University of Mining and Technology(Beijing)Beijing 100083China Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining and Technology(Beijing)Beijing 100083China Hebei Provincial Coalfield Geology Bureau Geophysical Prospecting&Survey Administration Xingtai 054000China

This article presents the evolution law of temperature fields in a large-scale laboratory Underground Coal Gasification reactions using Ulanqab lignite under actual *** results show that in the cultivation stage of oxidation zone,the main direction of the temperature field expansion is consistent with the crack direction of the coal *** the gasification stabilization stage,the main direction of the temperature field expansion is along the *** temperature of the coal seam and the overlying rock mass at its interface with the furnace directly above the gasification channel is equivalent to that of the coal seam temperature,and this temperature is much greater than the temperatures observed near both side walls of the gasification channel at the ***,temperatures perpendicular to the axis of the gasification channel are similar at a vertical distance of 40 cm away from the *** temperature distributions indicate that the transmission of heat through the overlying rock mass is more rapid in the vertical direction than in the horizontal ***,some degree of thermal dispersion is observed in the vertical direction near the *** thermal dispersion coefficient is 0.72 and dispersion angle γ is 78.7°.

关键词： Underground coal gasification Temperature distribution Coal seam crack Gasification channel Overlying strata

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Design and validation of a variable camber wing structure

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Chinese Journal of Aeronautics 2024年第2期37卷 1-11页

作者： Xiasheng SUN Jingfeng XUE Jin ZHOU Zhigang wang Wenjuan wang Mengjie ZHANG Chinese Aeronautical Establishment Beijing 100012China School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China Aircraft Strength Research Institute of China Xi’an 710065China Graduate School of Chinese Aeronautical Establishment Yangzhou 225002China

Variable camber wing technology is one of the important development trends of green aviation at *** smooth,seamless,continuous and adaptive change of wing camber,the aerodynamic performance is improved in achieving increase in lift and reduction in resistance and *** on the aerodynamic validation model CAE-AVM,Chinese Aeronautical Establishment(CAE)has carried out the design and validation of a variable camber wing,proposed an aerodynamic deformation matrix for the leading and trailing edges of aircraft wings in takeoff,landing and cruise *** structures and driving schemes are compared,and several key technology problems of leading and trailing edge deformation are solved.A full-size leading edge wind tunnel test piece with a span of 2.7 m and a trailing edge ground function test piece are *** deformation and shape maintenance capabilities of the leading edge is verified under real wind load conditions,and the load bearing and deformation capabilities of the trailing edge is verified under simulated follow-on *** results indicate that the leading and trailing edges of the variable camber wing can achieve the required deformation angle and have a certain load-bearing *** study can provide some insights into the application of variable camber wing technology for civil aircraft.

关键词： Variable camber wing Leading edge Trailing edge Structure Measurement and control Test

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Research progress on catalysts for organic sulfur hydrolysis: Review of activity and stability

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Chinese Journal of Chemical Engineering 2024年第7期71卷 203-216页

作者： Bingning wang Xianzhe wang Song Yang Chao Yang Huiling Fan Ju Shangguan State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of TechnologyTaiyuan 030024China Shanxi Engineering Center of Civil Clean Fuel Taiyuan University of TechnologyTaiyuan 030024China College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China College of Environmental Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

The removal of organic sulfur through catalytic hydrolysis is a significant area of research in the field of *** review provides an overview of recent advancements in catalytic hydrolysis technology of organic sulfur,including the activity,stability,and atmosphere effects of hydrolysis *** emphasis is on strategies for enhancing hydrolysis activity and anti-oxygen poisoning property of *** modification,metal doping and nitrogen doping have been found to improve the activity of *** components modification is the most commonly used method,the formation of oxygen vacancies through metal doping and creation of nitrogen basic sites through nitrogen doping also contribute to the hydrolysis of organic *** strategies for anti-oxygen poisoning are discussed in a systematic *** structural regulation of catalysts is beneficial for the desorption and diffusion of hydrogen sulfide(H_(2)S),thereby effectively inhibiting its *** doping and the addition of electronic promoters such as transition metals can protect active sites and decrease the number of active oxygen *** methods have been proven to enhance the anti-poisoning performance of ***,this article summarizes how different atmospheres affect the activity of hydrolysis *** objective of this review is to pave the way for the development of efficient,stable and widely used catalysts for organic sulfur hydrolysis.

关键词： Organic sulfur Hydrolysis Catalysts Activity Stability

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Solubility determination and comparison ofβ-HMX and RDX in two binary mixed solvents(acetonitrile+water,nitric acid+water)

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Chinese Journal of Chemical Engineering 2024年第5期69卷 238-249页

作者： Yuehua Yao Fan wang Yinguang Xu Zishuai Xu Lizhen Chen Jianlong wang School of Chemistry and Chemical Engineering North University of ChinaTaiyuan 030051China Gansu Yinguang Chemical Industry Group Co.Ltd. Baiyin 730900China

In order to remove hexahydro-1,3,5-trinitro-1,3,5-triazine(RDX),the main impurity,in process of polymorphic transformation of octrahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine(HMX),the solubility ofβ-HMX and RDX in acetonitrile(ACN)+water in the temperature range of 288.15-333.15 K and in nitric acid(HNO_(3))+water in the temperature range of 298.15-333.15 K were measured by laser dynamic *** results showed that the solubility of bothβ-HMX and RDX in binary mixed solvents increased monotonously as the temperature increase at a given solvent composition or with increasing of mole fraction of solvent(ACN and nitric acid).Solubility data were well correlated by the modified Apelblat equation,Jouyban-Acree model,Yaws equation and van't Hoff equation,and the Yaws equation achieved the best fitting results according to the relative error and the mean square error ***,the solubility ofβ-HMX and RDX in binary mixed solvent was compared,based on the solubility difference and the solvent's own properties,the best separation degree ofβ-HMX and RDX was found when the mole fraction of nitric acid was 0.22 at room temperature,which provided data support for HMX crystallization in mixed *** solubility differences between RDX andβ-HMX in mixed solvents were explained from the formation of intermolecular and intramolecular hydrogen bonds.

关键词： Solubility Octrahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine Hexahydro-1,3,5-trinitro-1,3,5-triazine Separation Model Hydrogen bond

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Albumin-based Theranostic Nanosystem for Drug Controlled Release and Magnetic Resonance Imaging Guided Therapy

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Journal of Bionic Engineering 2022年第1期19卷 188-196页

作者： Qiaoying wang Jiali Cai Zihan Xu Shihui Huang Ruiping Zhou Zhiyong wang Leshan Vocational and Technical College Leshan614000China Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Materials Science and EngineeringCenter for Functional BiomaterialsSun Yat-sen UniversityGuangzhou510275China Department of stomatology Shenzhen Yantian District People’s HospitalShenzhen518081China

Chemotherapy is still a kind of important strategy for cancer treatment,but lacking effective delivery system limits the therapeutic *** to the excellent biocompatibility,albumin has been employed as drug vehicle;however,it has to face complicated synthesis procedures and still needs an effective technology for the drug delivery *** this study,a facile method was utilized to prepare a protein-based theranostic system through the self-assembly of albumins with small molecules and drugs;furthermore,the paramagnetic divalent manganese ions were conjugated on the surface of the nanocomposite through a coordination bond and carried out the magnetic resonance *** nanosystem with a stable structure exhibited about 80 nanometer size and 7.7[Mn]mM-1S-1 T1 relaxivity;moreover,the pH-sensitive drug releasing property and the imaging function empower it with theranostic cancer ***,the nanocomposites effectively entered into the cancer cells and showed superior antitumor ability;and these treated cells exhibited significant T1 *** results suggested that the albumin-based nanosystem is a novel chemotherapy drug delivery vehicle and a promising candidate for magnetic resonance imaging.

关键词： Drug delivery system Magnetic resonance imaging Theranostic therapy Self-assembly

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Self-assembly synthesis of phosphorus-doped tubular g-C_(3)N_(4);Ti_(3)C_(2)MXene Schottky junction for boosting photocatalytic hydrogen evolution

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Green Energy & Environment 2023年第1期8卷 233-245页

作者： Kelei Huang Chunhu Li Xiuli Zhang Liang wang Wentai wang Xiangchao Meng Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationCollege of Chemistry and Chemical EngineeringOcean University of ChinaQingdao266100China

Establishing highly effective charge transfer channels in carbon nitride(g-C_(3)N_(4)) to enhance its photocatalytic activity is still a challenging ***,the delaminated 2D Ti_(3)C_(2) MXene nanosheets were employed to decorate the P-doped tubular g-C_(3)N_(4)(PTCN)for engineering 1D/2D Schottky heterojunction(PTCN/TC)through electrostatic *** optimized PTCN/TC exhibited the highest hydrogen evolution rate(565 μmol h^(-1)g^(-1)),which was 4.3 and 2.0-fold higher than pristine bulk g-C_(3)N_(4) and PTCN,*** enhancement may be primarily attributed to the phosphorus heteroatom doped and unique structure of 1D/2D g-C_(3)N_(4)/Ti_(3)C_(2) Schottky heterojunction,enhancing the light-harvesting and charges’***-dimensional pathway of g-C_(3)N_(4) tube and built-in electric field of interfacial Schottky effect can significantly facilitate the spatial separation of photogenerated charge carriers,and simultaneously inhibit their recombination via Schottky *** this composite,metallic Ti_(3)C_(2) was served as electrons sink and photons ***,ultrathin Ti_(3)C_(2) flake with exposed terminal metal sites as a co-catalyst exhibited higher photocatalytic reactivity in H2 evolution compared to carbon materials(such as reduced graphene oxide).This work not only proposed the mechanism of tubular g-C_(3)N_(4)/Ti_(3)C_(2) Schottky junction in photocatalysis,but also provided a feasible way to load ultrathin Ti_(3)C_(2) as a co-catalyst for designing highly efficient photocatalysts.

关键词： Tubular g-C_(3)N_(4) Ti_(3)C_(2)MXene Schottky junction Photocatalyst Hydrogen evolution

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