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Removal of methylene blue from dye wastewater by cattail leaf-based porous carbon materials

Environmental technology Reviews 2024年第1期13卷 663-679页

作者： Li, Weiwei Chen, Shuhui Tian, Mengmeng Ke, Guizhen State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan China

In this work, cattail leaf-based porous carbon materials (KCL-800-2 and PCL-500-2) with high specific surface were prepared from cattail leaf powder. The structure and morphology of cattail leaf-based porous carbon materials were characterized using SEM and BET. The results showed that the cattail leaf-based porous carbon materials have well-developed pore structure. The highest adsorption capacity of KCL (199.995 mg·g−1) was obtained with an alkaline-carbon ratio of 4:1, an activation temperature of 800°C and an activation time of 2 h. The highest adsorption capacity of PCL (92.0675 mg·g−1) was obtained with a phosphoric acid-carbon ratio of 2:1, an activation temperature of 500°C and an activation time of 2 h. The conditions for the adsorption of methylene blue on the KCL-800-2 and PCL-500-2 were investigated by a one-factor test. The optimization of the adsorption of methylene blue by KCL-800-2 and PCL-500-2 was carried out by a one-way test, and the results showed that the optimal adsorption conditions were temperature 298.15 K, PH 7, adsorption time 12 h, adsorbent dosage of 15, 20 mg, and the initial concentration of MB solution of 100 mg·L−1, 50 mg·L−1, and the adsorption capacity of the adsorbent under the conditions reached 127.3337 mg·g−1, 44.9886 mg·g−1 and 44.9886 mg·g−1, respectively. 44.9886 mg·g−1, respectively. The adsorption data of KCL-800-2 and PCL-500-2 on methylene blue (MB) fitted well with the Langmuir isothermal model and pseudo-second-order model. The adsorption process was a spontaneous, heat-absorbing entropy, monomolecular layer adsorption process. © 2024 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Chemical activation

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Multifunctional dual-anion compensation of amphoteric glycine hydrochloride enabled highly stable perovskite solar cells with prolonged carrier lifetime

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Nano Research 2024年第6期17卷 5131-5137页

作者： Lina Qin Mengfei Zhu Yuren Xia Xingkai Ma Daocheng Hong Yuxi Tian Zuoxiu Tie Zhong Jin State Key Laboratory of Coordination Chemistry MOE Key Laboratory of Mesoscopic ChemistryMOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Nanjing Tieming Energy Technology Co.Ltd. Nanjing 210093China Suzhou Tierui New Energy Technology Co.Ltd. Suzhou 215228China

Throughout years,the two-step spin-coating process is the most common method to prepare organic lead halide perovskite ***,the short reaction time of dropping the solution at the second step means that PbI2 cannot be completely transformed into perovskite *** solve this problem,we report the introduction of glycine hydrochloride(GlyHCl)into the second step of the two-step spin-coating process to prepare a FA_(0.9)MA_(0.1)PbI_(3-x)%-GlyHCl perovskite material(namely FAMA-x%-GlyHCl,where FA=formamidinium,MA=methylammonium,and x%stands for the molar ratio of GlyHCl added in FA iodide/MA iodide(FAI/MAI)precursor solution).The Cl−ion in GlyHCl assists the formation ofα-phase perovskite,and the-COO−group coordinates with Pb2+cation in a bridging way,making up for the anion vacancy in perovskite lattice and resulting in high absorption *** perovskite solar cells(PSCs)based on FAMA-9%-GlyHCl achieve a long carrier lifetime(527.0 ns),a photoelectric conversion efficiency(PCE)of 19.40%and good thermal stability,maintaining 85.8%of the initial PCE after being continuously heated at 60℃for 500 *** study helps to solve the problem of incomplete reaction in the two-step spin-coating process and puts forward a new solution for preparing high coverage perovskite films with large grain size.

关键词： dual-anion compensation glycine hydrochloride perovskite solar cells carrier lifetime thermal and moisture stability

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Hydrogenation kinetic of alkenes and aromatics over NiMo hydrotreatment catalysts

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Chinese Journal of Chemical Engineering 2025年第3期79卷 11-22页

作者： Wenbo Li Xinyao Fu Weiming Zhai Xingyang Huang Wenbin Chen Chen Zhang Wei Zhang Cuiqing Li Yong Luo Feng Liu Mingfeng Li Beijing Key Laboratory of Enze Biomass Fine Chemicals School of New Materials and Chemical Engineering Beijing Institute of Petrochemical Technology SINOPEC Research Institute of Petroleum Processing Co. LTD State Key Laboratory of Organic-Inorganic Composites Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical Technology

Hydrotreatment is a critical process in the petrochemical industry to produce gasoline or *** kinetic models and accurate kinetic parameters of hydrotreatment reactions are important for the industrial reactor design and scale-up *** this work,hydrogenation kinetics of alkene and aromatic model compounds were studied thoroughly to provide deep understanding on alkene and aromatic hydrogenation behaviors in gasoline and diesel *** NiMo hydrotreatment catalysts were used to obtain experimental data of hydrogenation *** ne,1-octene,naphthalene and phenanthrene were used as model compounds of alkenes and *** ns hel wood-Hougen-Watson（LHHW） kinetic models for hydro treatment reactions were *** addition,phase equilibrium calculations were combined with kinetic study,and it is discovered that using calculated liquid phase compositions as kinetic model input could greatly enhance the accuracy of kinetic models and the quality of kinetic parameters,leading to higher accordance with experimental *** kinetic models and phase equilibrium analysis,the effect of reaction conditions（temperature,pressure,and H2/oil ratio） on reaction rates were also predicted and *** importance of phase equilibrium in kinetic analysis for hydrotreating reactions was demonstrated in this study,which provides an effective approach for future hydrotreatment reactor design and catalyst optimization.

关键词： H2/oil ratio Hydrogenation Kinetic Phase equilibria

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Strength-toughness improvement of 13Cr4NiMo martensitic stainless steel with thermal cyclic heat treatment

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Journal of Iron and Steel Research International 2023年第8期30卷 1499-1510页

作者： Jie Xiong Yao-lin Tong Jie-long Peng Sheng-hua Zhang State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materialsand School of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004GuangxiChina Key Laboratory of High Performance Structural Materials and Thermo-Surface Processing Education Department of Guangxi Zhuang Autonomous RegionGuangxi UniversityNanning 530004GuangxiChina

To improve the strength-toughness of 13Cr4NiMo martensitic stainless steel(13-4MSS),a thermal cyclic heat treatment(TCHT)combined with the advantage of tempering was *** microstructures were characterized by scanning electron microscopy,X-ray diffraction and electron backscattered diffraction,and the mechanical behaviors in terms of tensile properties and impact toughness were analyzed in correlation with microstructural *** was found that grains and the martensitic matrix were refined by TCHT through the cyclic quenching transformation and austenite recrystallization,which was conducive to more nucleation quantity of reversed austenite during ***-sphericalcap nucleation model was used to explain the effect of refined grains of TCHT on the nucleation of reversed *** refinement by TCHT improved the brittle fracture stress to reduce the ductile-brittle transition temperature and thus improved the cryogenic impact toughness of *** austenite distributed at the martensitic lath boundary enhances the crack arrest performance and increases the britle fracture *** is concluded that reasonable TCHT plus tempering process significantly improves the strength-toughness of 13-4MSS,reflecting the comprehensive effect of grain refinement and reversed austenite.

关键词： Strength-Toughness 13Cr4NiMo martensitic stainless steel Thermal cyclic heat treatment Grain refinement Reversed austenite

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Reduced graphene oxide-induced in-situ uniform growth of hydrated WO_(3) film for enhanced electrochromic performance

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Nano Research 2025年第4期18卷 569-577页

作者： Rui Fang Yang Liu Chunyu Shi Huihui Jin Zibo Chen Haohao Sun Ben Lv Daping He Xusheng Zheng Yuli Xiong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China School of Science Wuhan University of TechnologyWuhan 430070China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya 572000China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

WO_(3)-graphene electrochromic materials are widely used in electrochromic devices including smart windows and electronic displays,due to their ability to adjust optical transmittance in the visible and near-infrared ranges under low electrode ***,the uniformity of the film remains a challenge for the widely used physical mixing-coating *** this study,we present a two-dimensional material-assisted synthesis of a porous hydrated WO_(3) film(WH-rGO)based on reduced graphene oxide(rGO)nanosheets and WO_(3)(rGO-WO_(3))seed layer via a hydrothermal *** incorporation of rGO not only promotes the uniform growth of hydrated WO_(3) film,enhancing ion transport but also introduces oxygen vacancies,creating an efficient conduction pathway for charge *** resulting WH-rGO film exhibits impressive performance,achieving 71% optical modulation at 700 nm,with bleaching and coloring times of 4.2 and 1.0 *** coloration efficiency is calculated at 156.11 cm^(2)·C^(-1),and the optical modulation is maintained at 93% of the initial optical modulation after 1000 cycles applied in the +1.0 and -1.1 V potential *** work offers new insights into the role of oxygen vacancies in enhancing the electrochromic properties of hydrated WO_(3) films through the addition of *** also provides a promising approach for the synthesis of electrochromic materials,facilitating their application in smart window technologies.

关键词： electrochromic film hydrated tungsten oxide reduced graphene oxide oxygen vacancy

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Analytical and numerical study of chirped optical solitons in a spatially inhomogeneous polynomial law fiber with parity-time symmetry potential

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Communications in Theoretical Physics 2023年第2期75卷 28-38页

作者： Yu Zhong Houria Triki Qin Zhou Research Group of Nonlinear Optical Science and Technology School of Mathematical and Physical SciencesWuhan Textile UniversityWuhan 430200China Radiation Physics Laboratory Department of PhysicsFaculty of SciencesBadji Mokhtar UniversityP.O.Box 1223000 AnnabaAlgeria State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China

This work studies the dynamical transmission of chirped optical solitons in a spatially inhomogeneous nonlinear fiber with cubic-quintic-septic nonlinearity,weak nonlocal nonlinearity,self-frequency shift and parity-time(PT)symmetry potential.A generalized variable-coefficient nonlinear Schr?dinger equation that models the dynamical evolution of solitons has been investigated by the analytical method of similarity transformation and the numerical mixed method of split-step Fourier method and Runge–Kutta *** analytical self-similar bright and kink solitons,as well as their associated frequency chirps,are derived for the first *** found that the amplitude of the bright and kink solitons can be controlled by adjusting the imaginary part of the PT-symmetric ***,the influence of the initial chirp parameter on the soliton pulse widths is quantitatively *** is worth emphasizing that we could control the chirp whether it is linear or nonlinear by adjusting optical fiber *** simulation results of bright and kink solitons fit perfectly with the analytical ones,and the stabilities of these soliton solutions against noises are checked by numerical simulation.

关键词： solitons symmetry inhomogeneous

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Alamouti code based on block repetition in FBMC/OQAM systems

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Digital Communications and Networks 2022年第1期8卷 58-63页

作者： Dejin Kong Xing Zheng Yukang Tian Tao Jiang Yue Zhang School of Electronic and Electrical Engineering Wuhan Textile UniversityWuhanChina State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhanChina Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhanChina Department of Engineering University of LeicesterLeicesterLEI 7RHUK

In this paper,we address the Alamouti code in Filter-Bank Multicarrier with Offset Quadrature Amplitude Modulation(FBMC/OQAM)and propose a novel block-wise Alamouti code,in which a repeated block is designed to eliminate the imaginary interference among FBMC/OQAM *** proposed approach exhibits a higher spectral efficiency than the conventional block-wise Alamouti scheme,as only one column of zero symbols is used as a guard interval instead of ***,compared to the conventional scheme,the bit error ratio is improved in the proposed block-wise Alamouti,as the assumption on channel invariance at two adjacent sub-carriers is not *** results indicate that,with a significantly reduced overhead,the proposed Alamouti scheme achieves better performance over the conventional block-wise Alamouti scheme.

关键词： Alamouti Filter-bank multicarrier Block repetition Imaginary interference

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Preparation of Kenaf Biochar and Its Adsorption Properties for Methylene Blue

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Journal of Renewable materials 2022年第12期10卷 3391-3404页

作者： Xin Wan Zhigang Xia Xiaoli Yang Chenfeng Zhou Yuanming Zhang Haoxi Ben Guangting Han Wei Jiang College of Textiles Qingdao UniversityQingdao260000 China State Key Laboratory of Bio Fibers and Eco-Textiles Qingdao UniversityQingdao266071China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan430000China Key Laboratory of Textile Fiber and Products(Wuhan Textile University) Ministry of EducationWuhan430200China

The toxic dyestuff's from printing and dyeing wastewater have caused serious damages to the ecological environ-ment,thus exploring effective methods to remove them having become a key ***,a series of biochar sam-ples were synthesized form kenaf to adsorb methylene blue(MB),which was acted as the dye representative for the test of adsorption capacity due to the presence of abundant double bond and aroma tic heterocyclic *** tuning the raw materials and pyrolysis temperature,a super adsorption capacity about 164.21 mg·g^(-1) was obtained over the biochar that pyrolyzed at 700℃ with the kenaf fiber as raw material Through the physical adsorption,elemental analysis,FTIR spectra and NH_(3)-TPD,it was found the high surface area and pore volume of biochar played a key role in the adsorption of MB,and the acidic sites would also assist the adsorption ***,the adsorption kinetic model was ftted and calculated,implying the MB physically adsorbed on the bio-char rapidly and then occurred chemical adsorption on the acidic *** addition,through KBC700 recycling experiments,it was found that kenaf biochar had a good binding force to MB,which effectively avoided secondary *** work provides important insights for the adsorption mechanism of MB by biochar,also offers some guidance for the further synthesis of biochar from various biomass.

关键词： Kenaf biochar pyrolysis temperature adsorption methylene blue kinetic analysis

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One-step solvothermal preparation of Fe-doped Ni_(0.85)Se/NF:An efficient catalyst for the oxygen evolution reaction

ChemPhysMater

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ChemPhysMater 2025年第1期4卷 78-85页

作者： Longqi Zhu Runze Wang Chen Wang Shuhan Yang Haizhen Liu Bo Xing Honghui Cheng Kuikui Wang Institute of Materials for Energy and Environment Laboratory of New Fiber Materials and Modern TextileGrowing Basis for State Key LaboratoryCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China National Engineering Laboratory of Circular Economy Sichuan University of Science and EngineeringZigong 643000China School of Mechanical Engineering Yangzhou UniversityYangzhou 225127China Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Changzhou UniversityChangzhou 213164China

Metal-cation doping is a fundamental strategy for enhancing catalyst ***-doped Ni_(0.85)Se/NF(Fe-Ni_(0.85)Se/NF)nanoparticles were prepared at 80°C via Fe^(2+)etching *** addition of Fe altered the coordination environment of the Ni species along with the catalyst's morphology,creating additional active ***,the synergistic interaction between the bimetallic components augmented the built-in activity and accelerated reaction *** Fe-Ni_(0.85)Se/NF electrocatalysts demonstrated remarkable catalytic activity for the oxygen evolution reaction(OER),with an acceptable overpotential of 276 mV and a Tafel slope of 58.1 mV dec^(−1)at 100 mA cm^(−2).Moreover,they demonstrated exceptional *** situ Raman and X-ray photoelectron spectroscopy(XPS)analyses showed that the excellent OER performance stemmed from the reconstruction-induced hydroxyl *** study offers a novel approach for streamlining the synthesis procedures and reducing the experimental costs for developing high-efficiency electrocatalysts.

关键词： Doping Selenylation Hydrothermal reaction Oxygen evolution reaction Electrocatalysts

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Bifunctional optical probe based on La_(3)Mg_(2)SbO_(9):Mn^(4+)phosphors for temperature and pressure sensing

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Journal of materials Science & technology 2024年第27期194卷 98-109页

作者： Zhanglin Chen Songmo Du Fei Li Shijia Zhang Shuo Zhao Zhaobo Tian Jie Zhang Xuanyi Yuan Guanghua Liu Kexin Chen State Key Laboratory of New Ceramics&Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China School of Microelectronics Southern University of Science and TechnologyShenzhen 518055China Advanced Ceramics and Structures Center Yongjiang LaboratoryNingbo 315021China Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-nano Devices Department of PhysicsRenmin University of ChinaBeijing 100872China

Photoluminescent materials,serving as optical probes,constitute a significant medium for reliable re-mote sensing of fundamental state parameters such as temperature and ***,we report a novel Mn^(4+)-activated perovskite-type La_(3) Mg2 SbO9 phosphor(LMS:Mn^(4+))for bifunctional application in both thermometry and *** excitation with 341 nm,LMS:Mn^(4+)(0.7%Mn^(4+))emits a bright narrow-band red light peaking at 705 nm with an FWHM(full width at half maximum)of 32 *** a thermometer,when the temperature surpasses 298 K,non-radiative transitions from the ^(2)Eg excited state lead to a sharp decrease in decay lifetimes with increasing *** allows for lifetime-based luminescence thermometry with a relative sensitivity of 2.52%K^(−1) at 391 ***,LMS:Mn^(4+)was processed into a temperature-sensing coating and its non-contact thermometry functionality was *** manometry applications,the LMS:Mn^(4+)probe experiences substantial pressure-dependent redshift with a sensitivity of 1.20 nm GPa^(−1) in the testing range of 9.48 GPa,which is about 3.3 times that of conventional ruby ***,its FWHM consistently remains below 37 nm,which con-tributes to a high reliability of pressure *** above results indicate that the LMS:Mn^(4+)constitutes a promising bifunctional luminescence probe material in thermometry and manometry.

关键词： Perovskite Phosphors Thermometry Manometry

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