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The modulating effect of N coordination on single-atom catalysts researched by Pt-N_(x)-C model through both experimental study and DFT simulation

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Journal of materials Science & technology 2021年第32期91卷 160-167页

作者： Mengmeng Fan Jiewu Cui Junjie Zhang Jingjie Wu Shuangming Chen Li Song Zixing Wang Ao Wang Robert Vajtai Yucheng Wu Pulickel MAjayan Jianchun Jiang Dongping Sun Nanjing Forestry University Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest ResourcesCollege of Chemical EngineeringNanjing 210037China Rice University Department of Materials Science and NanoEngineeringHoustonTX 77005USA Hefei University of Technology School of Materials Science and EngineeringHefei 230009China University of Cincinnati Department of Chemical and Environmental EngineeringCincinnatiOH 45221USA University of Science and Technology of China National Synchrotron Radiation LaboratoryCAS Center for Excellence in NanoscienceHefei 230026China Nanjing University of Science and Technology Chemicobiology and Functional Materials InstituteNanjing 210094China Key Lab of Biomass Energy and Material Jiangsu ProvinceJiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesInstitute of Chemical Industry of Forest ProductsChinese Academy of ForestryNanjing 210042China

N-doped carbon-based single-atom catalysts(NC-SACs) are widely researched in various electrochemical reactions due to high metal atom utilization and catalytic *** catalytic activity of NC-SACs originates from the coordinating structure between single metal site(M) and the doped nitrogen(N) in carbon matrix by forming M-N_(x)-C structure(1≤x≤4).The M-N4-C structure is widely considered to be the most stable and effective catalytic ***,there is no in-depth research for the "x" modulation in Pt-Nx-C structure and the corresponding catalytic ***,atomically dispersed Pt on N-doped carbon(Pt-NC) with Pt-Nx-C structure(1≤x≤4),as a research model,is fabricated by a ZIF-8 template and applied to catalytic oxygen *** carbonization temperatures are used to control N loss,and then modulate the N coordination of Pt-Nx-C *** Pt-NC has the predictable low half-wave potential(E_(1/2)) of 0.72 V vs RHE compared to the Pt/C 20% of 0.81 V due to low Pt ***,the Pt-NC shows a high onset potential(1.10 V vs RHE,determined for j=-0.1 mA cm^(2)) and a high current density of 5.2 mA cm^(-2),more positive and higher than that of Pt/C 20%(0.96 V) and 4.9 mA cm^(-2),*** the structural characterization and DFT simulation confirmed,the reducing PtN coordination number induces low valence of Pt atoms and low free energy of oxygen reduction,which is responsible for the improved catalytic ***,the Pt-NC shows high mass activity(172 times higher than that of Pt/C 20%),better stability and methanol crossover resistance.

关键词： Modulating effect N coordination Single-atom catalysts Pt-N_(x)-C model DFT simulation

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Surface Modified Zif-8 Nanocomposite Pervaporation Membrane for Efficient Furfural Recovery

SSRN

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SSRN 2022年

作者： Tonthanasutthivong, Chavakorn Faungnawakij, Kajornsak Surananthsatian, Apiwat Tung, Kuo-Lun Klaysom, Chalida Center of Excellence in Particle and Material Processing Technology Department of Chemical Engineering Chulalongkorn University Bangkok10330 Thailand 111 Thailand Science Park Phaholyothin Road Klong Laung Pathumthani12120 Thailand Department of Chemical Engineering National Taiwan University Taipei106 Taiwan Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok Thailand

Zeolitic imidazolate frameworks (ZIF-8) were incorporated into polydimethylsiloxane (PDMS), making a mixed matrix pervaporation membrane for furfural recovery. Effects of filler loading on morphology, properties, and separation performance of the membrane were investigated. ZIF-8 could disperse well in the polymer matrix and also increase the hydrophobic nature and furfural sorption ability of the membranes. The furfural permeability thus increased as the particle loading increased. Moreover, the surface modification of ZIF-8 (SM-ZIF-8) by a silane functional group could further enhance the furfural-affinity which preferably promoted the furfural transportation across the membrane. Furfural permeability of the membranes was improved by around 270% and 550% when ZIF-8 and the silane-modified ZIF-8 were incorporated, respectively. The furfural separation factor was also enhanced by 2-2.5 times. The best membrane performance was achieved when adding 15 wt.% of SM-ZIF-8, offering the furfural permeability of 37.14x105 barrer, separation factor of 26.84, and 10 times furfural product concentration. The separation mechanism of the prepared membranes was dominated by the sorption selectivity control which could be easily manipulated by incorporating a suitable filler. This study showcased the potential of furfural recovery by pervaporation when a promising furfural selective membrane is developed. © 2022, The Authors. All rights reserved.

关键词： Recovery

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Controllable preparation of ultrathin 2D BiOBr crystals for high-performance ultraviolet photodetector

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Science China materials 2021年第1期64卷 189-197页

作者： Pengfei Liu Lei Yin Liping Feng Yu Sun Hanqing Sun Wenqi Xiong Congxin Xia Zhenxing Wang Zhengtang Liu State Key Lab of Solidification Processing College of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an710072China Center for Excellence in Nanoscience CAS Key Laboratory of Nanosystem and Hierarchical FabricationNational Center for Nanoscience and TechnologyBeijing100190China College of Physics and Material Science Henan Normal UniversityXinxiang453007China

Ternary layered compound materials(bismuth oxyhalides and metal phosphorus trichalcogenides)stand out in electronic and optoelectronic fields due to their interesting physical ***,few studies focus on the preparation of high-quality two-dimensional(2D)BiOBr crystals with a typical layered structure,let alone their optoelectronic ***,for the first time,high-quality 2D BiOBr crystals with ultrathin thicknesses(less than 10 nm)and large domain sizes(~100μm)were efficiently prepared via a modified space-confined chemical vapor deposition(SCCVD)*** is demonstrated that a moderate amount of H2O molecules in the SCCVD system greatly promote the formation of high-quality 2D BiOBr crystals because of the strong polarity of H2O *** addition,a linear relationship between the thickness of BiOBr nanosheets and Raman shift of A1g(1)mode was *** theoretical calculations were carried out to verify the experimental ***,the BiOBr-based photodetector was fabricated,exhibiting excellent performances with a responsivity of 12.4 A W-1 and a detectivity of 1.6×1013 Jones at 365 *** study paves the way for controllable preparation of high-quality 2D BiOBr crystals and implies intriguing opportunities of them in optoelectronic applications.

关键词： 2D BiOBr crystals SCCVD method H2O molecule interlayer interaction ultraviolet photodetector

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Synthesis of Ni Nanoparticles for Solar Selective Absorber by Chemical Reduction Method 6

Synthesis of Ni Nanoparticles for Solar Selective Absorber b...

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6th Thailand International Nanotechnology Conference, NanoThailand 2018

作者： Srimara, P. Chevapruk, T. Kumnorkaew, P. Muangnapoh, T. Vas-Umnuay, P. Centre of Excellence in Particle and Material Processing Technology Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok10330 Thailand Department of Materials Engineering Faculty of Engineering Kasetsart University Bangkok10900 Thailand Pathumthani12120 Thailand

Nowadays nanostructured materials have become widely used in applications of concentrating solar power (CSP) system. Solar absorber, one of the most important layers in a multilayer solar selective coating, is used to convert solar energy into heat due to its selective properties. Recently, Ni nanoparticle solar absorbers have attracted considerable attention because they offer maximized absorption and minimized thermal radiation loss. However, only few detailed investigations on the effects of morphology and structure of Ni nanoparticle on the selective absorber properties have been reported. Therefore, in this work we synthesized Ni nanoparticles via a chemical reduction method. The rapid convective deposition was used to fabricate Ni nanoparticle-Al2O3 cermet thin film as the solar selective absorber. The various ratios of [NaOH]/[NiCl2] ranging from 4-20 was investigated in order to study the effects on the morphology of Ni nanoparticles. Characterization of the morphology and structure of Ni nanoparticles and cermet thin film was performed using scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. Emissometer was used to measure the thermal emittance, and UV-Vis-NIR spectrophotometer was used to measure the reflectance of the film. It was found that the formation of chain-like nanostructure of Ni appeared when the molar ratio of [NaOH]/[NiCl2] was 4. Increasing molar ratios resulted in longer chain formation. However, when the molar ratio reached 20, spherical-like Ni nanoparticles were observed. Moreover, at this ratio, Ni nanoparticle-Al2O3 cermet film demonstrated a solar absorptance of 0.64 and a thermal emittance of 0.53, resulting in a solar selectivity of 1.20 which is suitable as solar selective absorbing coating applications. © 2020 Elsevier Ltd.

关键词： Solar energy

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Composite hollow fiber membranes of modified zeolite Y for biogas upgrading

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materials Today: Proceedings 2020年 23卷 738-744页

作者： Thakorn Wichidit Kajornsak Faungnawakij Chalida Klaysom Center of Excellence in Particle Technology and Material Processing Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand National Nanotechnology Center (NANOTEC) National Science and Technology Development Agency (NSTDA) Pathumthani 12120 Thailand

Biogas production has been globally promoted due to the need for renewable energy. Membrane gas separation is one of the most potential technologies for separating impurity and inert gases from the biogas to meet the fuel standard. Membranes with high selectivity and high permeability are most desirable in membrane gas separation. This study aims to develop the composite hollow fiber membrane for CO 2 separation from CO 2 /CH 4 mixture. The synthesized composite membranes were composed of a support layer of polysulfone (PSF) and a selective layer, containing poly-block-amide (PEBAX1657) and modified zeolite Y as the filler. The effects of filler loading at 0, 5, 10, 15, and 20 on membrane properties and performance were investigated. The defect-free composite membranes were successfully obtained in all filler loadings.

关键词： PEBAX Polyether block amide Zeolite Y CO 2 /CH 4 separation Hollow fiber membrane

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Effect of pyrolysis temperature on characteristics of tunable magnetic biochar synthesized from watermelon rind and its tetracycline adsorption performance

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Journal of the Taiwan Institute of Chemical Engineers 2024年 160卷

作者： Thairattananon, Phisit Le, Giang T.T. Matsumura, Yukihiko Wu, Kevin C.W. Charinpanitkul, Tawatchai Department of Chemical Engineering Faculty of Engineering Center of Excellence in Particle and Material Processing Technology Chulalongkorn University Bangkok10330 Thailand Institute of Fundamental and Applied Sciences Duy Tan University Ho Chi Minh700000 Viet Nam Faculty of Environmental and Chemical Engineering Duy Tan University Da Nang550000 Viet Nam Mechanical Engineering Program Graduate School of Advanced Science and Engineering Kagamiyama Hiroshima Higashi-Hiroshima739-8527 Japan Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Chung-Li Taoyuan Taiwan Research Network of NANOTEC-KU on Nanocatalyst and Nanomaterials for Sustainable Energy and Environment Bangkok10900 Thailand

Background: Tetracycline is an emerging contaminant in water reservoirs, causing undesirable influences on human society. The promising usage of magnetic biochar (MBC) derived from watermelon rind has been explored in the adsorption of various contaminants owing to its high specific surface area and separability;however, the temperature-dependent changes of MBC and its sorption ability toward antibiotics have not been widely examined. Method: Tunable MBCs could be synthesized via simple pyrolysis of watermelon rind impregnated with FeCl3 at different temperatures (700–900 °C). The as-synthesized MBCs were characterized using scanning electron microscopy (SEM), an elemental analyzer, N2 adsorption/desorption, Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffractometry (XRD), and vibrating sample magnetometry (VSM). Then Tetracycline, an emerging contaminant in water reservoirs, was employed as the target contaminant, while adsorption kinetics, isotherm, the effect of pH, and reusability were investigated. Significant findings: The tunability of as-synthesized MBCs could be observed by their distinct changes in structural characteristics when varying pyrolysis temperature. MBC synthesized at 900 °C (MBC900) possessed a high-specific surface area (401 m2.g−1) and saturation magnetization (55.29 emu.g−1), resulting in a greater amount of sorption sites. Tetracycline adsorption by MBCs followed a pseudo-second-order kinetic model and fitted well with the Freundlich model. MBC900 is an excellent adsorbent with a maximum adsorption capacity of 77.6 mg.g−1 and could be used for at least five cycles with an insignificant decrease in the adsorption capacity. © 2024 Taiwan Institute of Chemical Engineers

关键词： Adsorption

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Highly stretchable kirigami-patterned nanofiber-based nanogenerators for harvesting human motion energy to power wearable electronics

材料展望（英文）

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材料展望（英文） 2024年第2期3卷 89-98页

作者： Chuan Ning Shengxin Xiang Xiupeng Sun Xinya Zhao Chuanhui Wei Lele Li Guoqiang Zheng Kai Dong College of Materials Science and Engineering Key Laboratory of Material Processing and Mold(Ministry of Education)Zhengzhou UniversityZhengzhou 450001People's Republic of China Key Laboratory of Materials Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001People's Republic of China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400People's Republic of China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People's Republic of China

Wearable electronics are advancing towards miniaturization and ***,traditional energy supply methods have largely hindered their *** effective solution to this problem is to convert human mechanical energy into electricity to power wearable electronic ***,it is greatly attractive to design flexible,foldable and even stretchable energy harvesting ***,we use the electrospinning and kirigami approach to develop a type of highly stretchable kirigami-patterned nanofiber-based triboelectric nanogenerator(K-TENG).Due to its innovative structural design,the K-TENG can achieve a tensile strain of 220％,independent of the tensile properties of the material *** a person swings their arms,the K-TENG fixed to the clothing can convert mechanical energy from human movement into electrical *** produced electricity can directly drive 50 LED lights and a digital watch,or be stored in a lithium battery to charge the smartwatch and smartphone,*** study employs a new method to fabricate a stretchable triboelectric nanogenerator and demonstrates its promising applications in wearable power technology.

关键词： stretchable triboelectric nanogenerators kirigami energy harvesting wearable electronics

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Recent progress in perovskite solar cells:from device to commercialization

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Science China Chemistry 2022年第12期65卷 2369-2416页

作者： Xinhui Luo Xuesong Lin Feng Gao Yang Zhao Xiaodong Li Liqing Zhan Zexiong Qiu Jin Wang Cong Chen Lei Meng Xiaofeng Gao Yu Zhang Zijian Huang Rundong Fan Huifen Liu Yanrun Chen Xiaoxue Ren Jiahong Tang Chun-Hao Chen Dong Yang Yongguang Tu Xiao Liu Dongxue Liu Qing Zhao Jingbi You Junfeng Fang Yongzhen Wu Hongwei Han Xiaodan Zhang Dewei Zhao Fuzhi Huang Huanping Zhou Yongbo Yuan Qi Chen Zhaokui Wang Shengzhong(Frank)Liu Rui Zhu Jotaro Nakazaki Yongfang Li Liyuan Han State Key Laboratory of Metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Physics and Electronic Science Engineering Research Center of Nanophotonics&Advanced InstrumentMinistry of EducationEast China Normal UniversityShanghai 200241China Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage CenterSolar Energy Research CenterNankai UniversityTianjin 300350China College of Materials Science and Engineering&Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationSichuan UniversityChengdu 610065China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationSchool of Materials Science and EngineeringPeking UniversityBeijing 100871China School of Physics and Electronics Hunan Key Laboratory of Nanophotonics and DevicesCentral South UniversityChangsha 410083China Experimental Center for Advanced Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Jia

Perovskite solar cells(PSCs) are undergoing rapid development and the power conversion efficiency reaches 25.7% which attracts increasing attention on their commercialization *** this review,we summarized the recent progress of PSCs based on device structures,perovskite-based tandem cells,large-area modules,stability,applications and ***,the challenges and perspectives are discussed,aiming at providing a thrust for the commercialization of PSCs in the near future.

关键词： perovskite solar cells device engineering stability application

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Mechanoluminescent hybrids from a natural resource for energy-related applications

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InfoMat 2021年第11期3卷 1272-1284页

作者： Chunfeng Wang Ronghua Ma Dengfeng Peng Xianhu Liu Jing Li Boru Jin Aixian Shan Yu Fu Lin Dong Wenchao Gao Zhong Lin Wang Caofeng Pan Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenChina CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingChina Key Laboratory of Materials Processing and Mold(Ministry of Education) Henan Key Laboratory of Diamond Optoelectronic Materials and DevicesKey Laboratory of Material PhysicsMinistry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhouChina Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface ScienceSchool of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijingChina Department of Civil Engineering Monash UniversityClaytonAustralia

Mechanoluminescent(ML)materials that directly convert mechanical energy into photon emission have emerged as promising candidates for various *** the recent advances in the development of both novel and conventional ML materials,the limited access to ML materials that simultaneously have the attributes of high brightness,low cost,self-recovery,and stability,and the lack of appropriate designs for constructing ML devices represent significant challenges that remain to be addressed to boost the practical application of ML ***,ML hybrids derived from a natural source,waste eggshell,with the aforementioned attributes are *** introduction of the eggshell not only enables the preparation of the hybrid in a simple and cost-effective manner but also contributes to the homochromatism(red,green,or blue emission),high brightness,and robustness of the resultant ML *** significant properties of the ML hybrids,together with the proposed structural design,such as porosity or core–shell structure,could expedite a series of mechanic-optical applications,including the self-luminous shoes for the conversion of human motions into light and light generators that efficiently harvest water wave *** fascinating properties,versatile designs,and the efficient protocol of“turning waste into treasure”of the ML hybrids represent significant advances in ML materials,promising a leap to the practical applications of this flouring material family.

关键词： blue energy harvesting eggshell waste mechanoluminescent hybrids smart sensing

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Synthesis of Ni Nanoparticles for Solar Selective Absorber by Chemical Reduction Method

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materials Today: Proceedings 2020年 23卷 720-725页

作者： P. Srimara T. Chevapruk P. Kumnorkaew T. Muangnapoh P. Vas-Umnuay Centre of Excellence in Particle and Material Processing Technology Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand Department of Materials Engineering Faculty of Engineering Kasetsart University Bangkok 10900 Thailand National Nanotechnology Center (NANOTEC) National Science and Technology Development Agency (NSTDA) Pathumthani 12120 Thailand

Nowadays nanostructured materials have become widely used in applications of concentrating solar power (CSP) system. Solar absorber, one of the most important layers in a multilayer solar selective coating, is used to convert solar energy into heat due to its selective properties. Recently, Ni nanoparticle solar absorbers have attracted considerable attention because they offer maximized absorption and minimized thermal radiation loss. However, only few detailed investigations on the effects of morphology and structure of Ni nanoparticle on the selective absorber properties have been reported. Therefore, in this work we synthesized Ni nanoparticles via a chemical reduction method. The rapid convective deposition was used to fabricate Ni nanoparticle-Al 2 O 3 cermet thin film as the solar selective absorber. The various ratios of [NaOH]/[NiCl 2 ] ranging from 4-20 was investigated in order to study the effects on the morphology of Ni nanoparticles. Characterization of the morphology and structure of Ni nanoparticles and cermet thin film was performed using scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. Emissometer was used to measure the thermal emittance, and UV-Vis-NIR spectrophotometer was used to measure the reflectance of the film. It was found that the formation of chain-like nanostructure of Ni appeared when the molar ratio of [NaOH]/[NiCl 2 ] was 4. Increasing molar ratios resulted in longer chain formation. However, when the molar ratio reached 20, spherical-like Ni nanoparticles were observed. Moreover, at this ratio, Ni nanoparticle-Al 2 O 3 cermet film demonstrated a solar absorptance of 0.64 and a thermal emittance of 0.53, resulting in a solar selectivity of 1.20 which is suitable as solar selective absorbing coating applications.

关键词： Solar selective absorber Convective deposition Cermet Ni nanoparticle-Al 2 O 3

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