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Boosting Peroxymonosulfate Activation via Co-Based LDH-Derived Magnetic Catalysts:A Dynamic and Static state Assessment of Efficient Radical-Assisted Electron Transfer Processes

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Energy & Environmental materials 2024年第5期7卷 301-312页

作者： Wenhan Yang Junming Xia Fanfan Shang Ge Ge Yang Bin Wang Hairui Cai Lingyun Jing Hao Zhu Shengchun Yang Chao Liang Guosheng Shao MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of PhysicsNational Innovation Platform(Center)for Industry-Education Integration of Energy Storage TechnologyXi'an Jiaotong UniversityXi'an 710000China State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(1AM) Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjing 210023China College of Petroleum and Chemical Engineering Lanzhou University of TechnologyLanzhou 730050China Key Laboratory of Western China's Environmental Systems(Ministry of Education)and Gansu Engineering Research Center of Fine Particles Pollution Control Technology and Equipment College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China State Center for International Cooperation on Designer Low-Carbon&Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China

Heterogeneous catalysts promoting efficient production of reactive species and dynamically stabilized electron transfer mechanisms for peroxomonosulfates(PMS)still lack systematic ***,a more stable magnetic layered double oxides(CFLDO/N-C),was designed using self-polymerization and high temperature carbonization of *** CFLDO/N-C/PMS system effectively activated PMS to remove 99%(k=0.737 min^(-1))of tetracycline(TC)within 10 *** CFLDO/N-C/PMS system exhibited favorable resistance to inorganic anions and natural organics,as well as satisfactory suitability for multiple *** magnetic properties of the catalyst facilitated the separation of catalysts from the liquid phase,resulting in excellent reproducibility and effectively reducing the leaching of metal *** electronic bridge was constructed between cobalt(the active platform of the catalyst)and PMS,inducing PMS to break the O-O bond to generate the active *** combination of static analysis and dynamic evolution confirmed the effective adsorption of PMS on the catalyst surface as well as the strong radical-assisted electron transfer ***,we further identified the sites where the reactive species attacked the TC and evaluated the toxicity of the *** findings offer innovative insights into the rapid degradation of pollutants achieved by transition metals in SR-AOPs and its mechanistic elaboration.

关键词： advanced oxidation process degradation mechanisms electron transport layered double hydroxide reactive species

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High-entropy alloy nanocrystals boosting photocatalytic hydrogen evolution coupled with selective oxidation of cinnamyl alcohol

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Chinese Journal of Catalysis 2025年第1期68卷 326-335页

作者： Xianglin Xiang Bei Cheng Bicheng Zhu Chuanjia Jiang Guijie Liang Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430078HubeiChina College of Environmental Science and Engineering Nankai UniversityTianjin 300350China Hubei Key Laboratory of Low Dimensional Arts and Science Hubei University of Arts and ScienceXiangyang 441053HubeiChina

Photocatalysis provides a promising solution to the worldwide shortages of energy and industrially important raw materials by utilizing sunlight for coupled hydrogen(H_(2))production with controllable organic ***,we demonstrate that PtFeNiCoCu high-entropy alloy(HEA)nanocrystals can act as efficient cocatalysts for H_(2)evolution coupled with selective oxidation of cinnamyl alcohol to cinnamaldehyde by cubic cadmium sulfide(CdS)quantum dots(QDs)with uniform sizes of 4.0±0.5 *** nanocrystals were prepared via a simple solvothermal approach,and were successfully integrated with CdS QDs by an electrostatic self-assembly method to construct HEA/CdS *** optimized HEA/CdS sample presented an enhanced photocatalytic H_(2)production rate of 7.15 mmol g^(-1)h^(-1),which was 13 times that of pure CdS ***,a cinnamyl alcohol conversion of 96.2%with cinnamaldehyde selectivity of 99.5%was achieved after photoreaction for 3 *** integration of HEA with CdS QDs extended the optical absorption edge from 475 to 484 *** d-band center analysis,Pt atoms in the HEA are the active sites for H_(2)evolution,exhibiting higher catalytic activity than pure ***,the band structure of the CdS QDs enables the oxidative transformation of cinnamyl alcohol to cinnamaldehyde with high ***,femtosecond transient absorption spectroscopy shows that HEA can significantly promote the separation of photogenerated carriers in CdS,which is vital for achieving enhanced photocatalytic *** work inspires atomic-level design of photocatalytic materials for coordinated production of green energy carriers and value-added products.

关键词： Artificial photosynthesis d-Band center Photocatalytic hydrogen evolution Quantum dots Value-added organic synthesis

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Fabrication and Property of SiC Ceramic with Large Thickness/Diameter Ratios

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Journal of Wuhan University of technology(materials Science) 2020年第3期35卷 506-513页

作者： TAN Lin HE Qianglong HU Lanxin TIAN Tian WANG Weimin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Silicon carbide ceramics with different thicknesses/diameter ratios were prepared by using ultra-fine silicon carbide powder with the sintering additives of 1.0 wt% boron and 1.5 wt% carbon. The influence of thickness/diameter ratio on the microstructure and density of SiC ceramics was investigated in detail. The experimental results show that the addition of boron and carbon sintering aids can promote the densification process of SiC ceramic, leading to the low sintering temperature and improve mechanical properties. At 1950 ℃, SiC ceramic with a density of 99% exhibits Young's modulus, hardness, and flexural strength of 476 MPa, 28.3 GPa, and 334 MPa, respectively. It is found that long holding time has a positive effect on the uniformity of the microstructure and density distribution of SiC ceramics with large thickness/diameter ratios. Additionally, the sintering additive of boron can solid-solve into SiC, and then facilitate the phase transformation of SiC to form 6H-SiC and 4H-SiC composite ceramics.

关键词： SiC large thickness/diameter ratios mechanical properties uniformity

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Structure and enhanced dielectric temperature stability of BaTiO3- based ceramics by Ca ion B site-doping

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Journal of Materiomics 2021年第2期7卷 295-301页

作者： Xuewen Jiang Hua Hao Yang Yang Enhao Zhou Shujun Zhang Ping Wei Minghe Cao Zhonghua Yao Hanxing Liu Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan528200China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Material Science and EngineeringWuhan University of TechnologyWuhan430070China Institute for Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongWollongongNSW2500Australia Nanostructure Research Centre Wuhan University of TechnologyWuhan430070China

Capacitor is an important part of many electronic devices,so the temperature stability as one key parameter of capacitor needs to be improved constantly for meeting the requirements of various application ***,combined with the X-ray diffraction(XRD),selected area electron diffraction(SAED)and Vienna Ab-initio Simulation Package(VASP)calculation,it was confirmed that Ca ion can substitute the Ti site in the BaTi1-xCaxO3-x[BTC100](0≤x≤0.05)ceramics synthesized by solid-phase method which greatly improved the low-temperature stability of dielectric ***,introducing Bi3þand Zn^(2+) into BTC4 to form(1-y)BaTi0.6Ca0.04O2.96-yBi(Zn_(0.5)Ti_(0.5))O_(3)[(1-y)BTC4-yBZT](0.1≤y≤0.2)ceramics can further improve the dielectric-temperature stability by means of diffused phase transition and core-shell *** importantly,the 0.85BTC4-0.15BZT ceramics with a pseudocubic perovskite structure possessed a temperature coefficient of capacitance at 25℃(TCC25℃)being less than±15%over a wide temperature range of 55℃-200℃and a temperate dielectric constant(ε=1060)and low dielectric loss(tanδ=1.5%),which measure up to the higher standard in the current capacitor industry such as X9R requirements.

关键词： BaTiO3 Ca substituted X9R capacitors Dielectric properties

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Flame-retardant Cotton Fabric based on Electrostatic Layer-by-layer Assembly of Vermiculite 16

Flame-retardant Cotton Fabric based on Electrostatic Layer-b...

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16th Textile Bioengineering and Informatics Symposium, TBIS 2023

作者： Cheng, Hong-Bin Liu, Xiao-Shu Xiao, Shi-Li School of Textile Science and Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials & Advanced Processing Technology Wuhan430200 China

ISBN: (纸本)9781713879473

Flame-retardant cotton fabric, in clothing and decoration, can reduce the damage in a fire. This study reports a facile way to prepare vermiculite-assembled cotton fabrics using layer by layer assemble technique. The vermiculite-assembled cotton fabrics synthesized are characterized by SEM, FTIR, Instron and a vertical inflammability test. The results show that vermiculite assembled on cotton fabrics could improve the mechanical property and endow the fabric with the good flame-retardant property. © TBIS 2023. All rights reserved.

关键词： Cotton fabrics

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Red/NIR emission carbonized polymer dots based on citric acid-benzoylurea and their application in lymph nodes imaging

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Chinese Chemical Letters 2023年第11期34卷 225-230页

作者： Feishi Shan Tingrui Zhang Chengshuang Liao Xue Yue Jing Zhang Li Yan Yanman Liu Zhixing Cao Min Wang Yahui Zhang Leyong Wang Zhouyu Wang Xiaoqi Yu Sichuan Engineering Research Center for Molecular Targeted Diagnostic&Therapeutic Drugs Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan ProvinceResearch and Application of Small Organic Chiral Molecules Key Laboratory of Yibin CityDepartment of ChemistryXihua UniversityChengdu 610039China State Key Laboratory of Southwestern Chinese Medicine Resources Pharmacy SchoolChengdu University of Traditional Chinese MedicineChengdu 611137China State Key Laboratory of Analytical Chemistry for Life Science Key Laboratory of Mesoscopic Chemistry of MOEJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Identification of lymph nodes(LNs)is critical for studies of the structure,the role in disease development,and the efficacy of disease *** polymer dots(CPDs)are expected to be potential LNs-targeted imaging agents due to their excellent properties with special structure,better photoluminescence(PL)and great ***,a red/near infrared(NIR)emission CPDs(RCPDs)with one and two-photon bioimaging based on citric acid(CA)and benzoylurea(BU)are ***,the RCPDs are capable of targeting LNs for *** homing has been demonstrated to be the cellular mechanism of RCPDs target LNs *** work has developed a new nanomaterial for targeted imaging of LNs,while the biological applications of CPDs have been expanded and deepened.

关键词： Carbonized polymer dots Red/NIR emission LNs-targeting Lymphocyte homing

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A new strategy to access Co/N co-doped carbon nanotubes as oxygen reduction reaction catalysts

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Chinese Chemical Letters 2021年第1期32卷 535-538页

作者： Bingshuai Liu Huang Zhou Huihui Jin Jiawei Zhu Zhe Wang Chenxi Hu Lvhan Liang Shichun Mu Daping He State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center of RF-Microwave Technology and Application Wuhan University of TechnologyWuhan 430070China

Carbon nanotubes(CNTs),as one-dimensional nanomaterials,show great potential in energy conversion and storage due to their efficient electrical conductivity and mass ***,the security risks,time-consuming and high cost of the preparation process hinder its further ***,we develop that a negative pressure rather than a following gas environment can promote the generation of cobalt and nitrogen co-doped CNTs(Co/N-CNTs) by using cobalt zeolitic imidazolate framework(ZIF-67) as a precursor,in which the negative pressure plays a key role in adjusting the size of cobalt nanoparticles and stimulating the rearragement of carbon atoms for forming ***,the obtained Co/N-CNTs,with high content of pyridinic nitrogen and abundant graphitized structure,exhibit superior catalytic activity for oxygen reduction reaction(ORR) with half-wave potential(E_(1/2)) of 0.85 V and durability in terms of the minimum current loss(2%) after the 30,000 s *** development provides a new pathway for large-scale and cost-effective preparation of metal-doped CNTs for various applications.

关键词： Negative pressure Cobalt zeolitic imidazolate framework Cobalt and nitrogen co-doped Carbon nanotubes Oxygen reduction reaction

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Fabrication and Characterization of Pressure Sensors Based on Xanthan Gum and Pullulan 16

Fabrication and Characterization of Pressure Sensors Based o...

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16th Textile Bioengineering and Informatics Symposium, TBIS 2023

作者： Zhang, Ya-Qi Liu, Shi-Yao Tao, Yong-Zhen State Key Laboratory for Textile Materials and Advanced Processing Technology Wuhan Textile University Wuhan China College of Material Science and Engineering Wuhan Textile University Wuhan China

ISBN: (纸本)9781713879473

Conductive hydrogels based on biopolymers have potential applications in the field of wearable devices, implantable devices, and human-machine interfaces due to their biocompatibility as well as conductivity. However, hydrogels are prone to water loss under dry atmospheres. In this paper, a biopolymer-based pressure sensor with water retention was designed. Xanthan gum (XG) and pullulan (P) were cross-linked with sodium trimetaphosphate (STMP) to prepare XG5-P-STMP, and polyethylene glycol with a molecular weight of 200 (PEG200) was added into hydrogels to improve moisture retention. The mechanical properties of the hydrogels were investigated by rheologic measurements such as time sweep, frequency sweep, and strain sweep. The results showed that the addition of PEG200 enhanced strength and moisture retention of the hydrogels, and high PEG200 content hindered the recovery property of the hydrogels. Furthermore, the XG5-P-PEG-STMP hydrogel with ionic conductivity and recoverability was explored as a pressure sensor, and the resistance change ratio exhibited repeatable profile. This work provides some valuable information for further applications of natural polysaccharides as intelligent flexible elections. © TBIS 2023. All rights reserved.

关键词： Hydrogels

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Structure stability, electronic property and voltage profile of LiFe_(1-n)NnP_(1-m)M_(m)O_(4) olivine cathode material

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Rare Metals 2021年第12期40卷 3512-3519页

作者： Zhi-Hong Cui Xue-Feng Lu Jian-Hua Luo Xin Guo Hong-Tao Xue Fu-Ling Tang State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal Department of Materials Science and EngineeringLanzhou University of TechnologyLanzhou 730050China

First-principles computational studies under density functional theory(DFT) framework were used to investigate the structural stability, conductivity and voltage profile of LiFe_(1-n)NnP_(1-m)M_(m)O_(4)(N, M = Si or S) electrode materials. It is found that the Li FeP_(7/8)Si_(1/8)O_(4) system has the most stable structure. After doping, the band gap values of the systems decrease gradually, and LiFe_(7/8)S_(1/8)PO_(4) system has a minimum band gap of 1.553 e V, attributed to the hybridization of the Fe-d and S-p orbital electrons. The Li Fe P7/8 S1/8 O4 system demonstrates the characteristic of n-type semiconductor, and other doping systems have the feature of p-type semiconductor. Charge density difference maps show that the covalent property of Si-O bond is enhanced in the Li FeP_(7/8)Si_(1/8)O_(4) system. The average distance of Li and O atoms in the S doping systems increases from 0.21026 to 0.21486 and 0.21129 nm, respectively,indicating that doping broadens significantly the channel of Li ion de-intercalation in LiFe_(7/8)S_(1/8)PO_(4) and LiFeP_(7/8)S_(1/8)O_(4). Additionally, the results of lithium intercalation potential imply that the voltages of the doping systems fallinto the range of 2.23-2.86 V.

关键词： Energy storage materials First principles Battery cathode LiFePO_(4) Doping Electronic properties

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High-pressure Sintering of Boron Carbide-Titanium Diboride Composites and Its Densification Mechanism

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Journal of Wuhan University of technology(materials Science) 2020年第2期35卷 356-362页

作者： GAO Jiancheng WANG Dangqiang LEI Liwen ZHANG Fan ZHANG Jinyong FU Zhengyi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

A high-pressure hot-pressing process was applied to densify a commercial boron carbide-titanium diboride (B4C-TiB2) powder *** fully dense (98.6%) materials were obtained at 1700℃ under a pressure of *** to the sintering temperature required to achieve similar results when a pressure of only 30MPa was applied,the sintering temperature was found to decrease by about 200℃ under pressure of 100 *** of the thermodynamics and microstructure showed that the plastic deformation of the B4C grains induced by high pressure dominated the densification mechanism when high pressure was ***,higher pressure resulted in remarkably improved mechanical properties of the composites,which could be traced back to the generation of stacking faults in the B4C grains and aggregation of TiB2.

关键词： hot-pressing high-pressure sintering densification TiB2-B4C

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