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Comparative study on photocatalytic degradation of methylene blue using pristine ZnO and Ni/ZnO composite films

materials Today: Proceedings 2022年 66卷 3168-3173页

作者： Srisai, Jirawan Muangnapoh, Tanyakorn Vas-Umnuay, Paravee Center of Excellence in Particle and Material Processing Technology Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand National Science and Technology Development Agency Pathumthani Klong Luang 12120 Thailand

Industrial dye wastewater is rich in organic molecules that are harmful to all types of living organisms. The present work investigates the potential of the incorporation of Ni nanoparticles into ZnO films in order to enhance the photocatalytic degradation performance. Pristine ZnO has been widely used as a photocatalyst in a photocatalytic degradation treatment of wastewater, however can only be activated by UV light. Incorporation of Ni into ZnO can broaden the light spectrum by using both visible light and UV for the reaction, therefore enhancing the degradation efficiency. The experimental runs were performed to evaluate the effect of incorporation of Ni nanoparticles into ZnO films and morphology of Ni nanoparticles (rod-cubic-like and chain-like shapes) on the photocatalytic degradation efficiency. In this study, methylene blue was used as a model wastewater. The results revealed that addition of Ni enhanced the degradation efficiency to 44% (rod-cubic-like) and 40% (chain-like), compared to that of pristine ZnO of 33%. © 2022

关键词： Zinc oxide

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Investigation of detergent compositions on the effectiveness of alumina and aluminium titanium carbide cleaning

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materials Today: Proceedings 2022年 66卷 3185-3190页

作者： Pattaradamrongchai, Kittikron Prasittichai, Chaiya Chakthranont, Pongkarn Methaapanon, Rungthiwa Center of Excellence in Particle and Material Processing Technology Department of Chemical Engineering Faculty of Engineering Chulalongkorn University 254 Phayathai Road Pathumwan Bangkok 10330 Thailand Department of Chemistry Faculty of Science Kasetsart University Bangkok 10900 Thailand 111 Thailand Science Park Pathum Thani 12120 Thailand

particle contamination on a surface is a critical issue for the electronics manufacturing processes. Detergents that are composed of surfactants and appropriate additives can decrease the natural attraction forces between particles and surface, leading to effective particle removal. This work aims to investigate the influences of detergent pH and additives on the effectiveness in removing inorganic particles from Al2O3 and AlTiC substrates, which are commonly used materials in the electronics industry. In this study, we chose a model detergent comprised of an anionic surfactant, sodium dodecylbenzene sulfonate, and two additives, namely sodium acid pyrophosphate and ethanolamine. Talc particles were employed as a model inorganic contaminant. The effects of pH and ethanolamine concentration on the cleaning effectiveness of the model detergent were examined using optical microscopy and X-ray photoelectron spectroscopy (XPS). The stability of talc suspension in detergent solution, which is related to the possibility of particle recontamination, was determined by zeta potential. Our results indicate that the pH of the detergent directly affects its cleaning efficiency, likely by increasing the electrostatic repulsion between the surface and the talc particles. Similarly, the increasing ethanolamine concentration elevates the pH of the detergent, leading to better cleaning performances on both Al2O3 and AlTiC substrates. © 2022

关键词： Aluminum oxide

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Efficient lignin depolymerization by continuous flow microreactor-assisted electrochemical advanced oxidation in water/co-solvent system

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Green Chemistry 2023年第4期26卷 1889-1900页

作者： Waura-Angkura, Lalida Matsagar, Babasaheb M. Lee, Kevin Pavarajarn, Varong Wu, Kevin C.-W. Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Center of Excellence in Particle and Materials Processing Technology Department of Chemical Engineering Chulalongkorn University Bangkok10330 Thailand Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan Chung-Li Taiwan

This study presented for the first time a continuous flow microreactor system for efficient dealkaline lignin depolymerization applying an electrochemical advanced oxidation process (EAOP). The insolubility of dealkaline lignin in water poses a challenge for its chemical depolymerization via EAOP. To address this limitation, several co-solvent systems were developed and investigated to achieve efficient dealkaline lignin depolymerization. Five water-miscible organic solvents, namely methanol (MeOH), ethanol (EtOH), acetonitrile (MeCN), tetrahydrofuran (THF), and N,N-dimethylformamide (DMF), were used as co-solvents. With the co-solvent fraction of 1% in water, the solubility of dealkaline lignin followed the order of THF > DMF > MeCN > MeOH > EtOH. The electron spin resonance (EPR) of various co-solvents revealed that different co-solvents affected the concentration of in situ OH radical generation, leading to the difference in dealkaline lignin conversions. For dealkaline lignin in water-MeCN system, 72% conversion was observed within 100 s of residence time under ambient conditions with a 1 mA current. Moreover, the two main lignin model compounds (2-phenoxy-1-phenyl ethanol (PPE) containing β-O-4 and benzyl phenyl ether (BPE) containing α-O-4) were used to understand the kinetic analysis and degradation of dealkaline lignin. High conversions of 75% and 92% were achieved for the β-O-4 (PPE) and α-O-4 (BPE) lignin model compounds, respectively. All the products were confirmed using GC-MS analysis. Additionally, mechanistic insights for lignin depolymerization were provided using lignin model compounds. © 2024 The Royal Society of Chemistry.

关键词： Lignin

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Scalable one-step wet-spinning of triboelectric fibers for large-area power and sensing textiles

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Nano Research 2023年第5期16卷 7518-7526页

作者： Chuan Ning Chuanhui Wei Feifan Sheng Renwei Cheng Yingying Li Guoqiang Zheng Kai Dong Zhong Lin Wang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China College of Materials Science and Engineering Key Laboratory of Material Processing and Mold(Ministry of Education)Henan Key Laboratory of Advanced Nylon Materials and ApplicationZhengzhou UniversityZhengzhou 450001China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China School of Material Science and Engineering Georgia Institute of TechnologyAtlantaGeorgia 30332USA

Textile-based electronic devices have attracted increasing interest in recent years due to their wearability,breathability,*** them,textile-based triboelectric nanogenerators(T-TENGs)exhibit remarkable advantages in mechanical energy harvesting and self-powered ***,there are still some key challenges to the development and application of triboelectric fibers(the basic unit of T-TENG).Scalable production and large-scale integration are still significant factors hindering its *** the same time,there are some difficulties to overcome in the manufacturing process,such as achieving good stretchability and a quick production,overcoming incompatibility between conductive and triboelectric *** this study,triboelectric fibers are produced continuously by one-step coaxial wet *** are only 0.18 mm in diameter and consist of liquid metal(LM)core and polyurethane(PU)*** to the good mechanical properties between them,there is no interface incompatibility of the triboelectric *** addition,triboelectric fibers can be made into large areas of T-TENG by means of digital embroidery and plain *** T-TENGs can be used for energy harvesting and self-powered *** they are fixed on the forearm can monitor various strokes in *** work provides a promising strategy for the large-scale fabrication and large-area integration of triboelectric fibers,promotes the development of wearable T-TENGs.

关键词： triboelectric nanogenerators coaxial wet spinning scale production large-area integration self-powered sensing

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Enhanced Magnetic Interaction between Ga and Fe in Two-Dimensional van der Waals Ferromagnetic Crystal Fe_(3)GaTe_(2)

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Chinese Physics Letters 2023年第8期40卷 108-112页

作者：查鹤鸣李炜张高节刘文晶邓力玮姜琦叶茂武浩常海欣乔山 State Key Laboratory of Functional Materials for Informatics Center for Excellence in Superconducting ElectronicsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Department of Physics and State Key Laboratory of Surfac Physics Fudan UniversityShanghai 200433China State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan National High Magnetic Field Center and Institute for Quantum Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Shenzhen R&D Center of Huazhong University of Science and Technology Shenzhen 518000China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Fe_(3)GaTe_(2),a recently discovered van der Waals ferromagnetic crystal with the highest Curie temperature and strong perpendicular magnetic anisotropy among two-dimensional(2D)magnetic materials,has attracted significant attention and makes it a promising candidate for next-generation spintronic *** with Fe_(3)GeTe_(2),which has the similar crystal structure,the mechanism of the enhanced ferromagnetic properties in Fe_(3)GaTe_(2)is still unclear and needs to be ***,by using x-ray magnetic circular dichroism measurements,we find that both Ga and Te atoms contribute to the total magnetic moment of the system with antiferromagnetic coupling to Fe *** first-principles calculations reveal that Fe_(3)GaTe_(2)has van Hove singularities at the Fermi level in nonmagnetic state,resulting in the magnetic instability of the system and susceptibility to magnetic phase *** addition,the calculation results about the density of states in ferromagnetic states of two materials suggest that the exchange interaction between Fe atoms is strengthened by replacing Ge atoms with Ga *** findings indicate the increase of both the itinerate and local moments in Fe_(3)GaTe_(2)in view of Stoner and exchange interaction models,which results in the enhancement of the overall magnetism and a higher Curie *** work provides insight into the underlying mechanism of Fe_(3)GaTe_(2)’s remarkable magnetic properties and has important implications for searching 2D materials with expected magnetic properties in the future.

关键词： magnetic ferromagnetic mechanism

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Anisotropic robustness of talc particles after surface modifications probed by atomic force microscopy force spectroscopy

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Particuology 2021年第5期19卷 308-315页

作者： Vipada Dokmai Kitiphat Sinthiptharakoon Witchukorn Phuthong Varong Pavarajarn Center of Excellence in Particle and Materials Processing Technology Department of Chemical EngineeringFaculty of EngineeringChulalongkorn UniversityBangkok 10330Thailand National Nanotechnology Center(NANOTEC) National Science and Technology Development Agency(NSTDA)111 Thailand Science ParkPhahonyothin RoadKhlong NuengKhlong LuangPhathum Thani 12120Thailand Department of Physics Faculty of ScienceKasetsart UniversityLadyaoChatuchakBangkok 10900Thailand

As a versatile mineral,the crystalline hydrated magnesium silicate talcum,or talc,has been widely used in numerous industries from pharmaceutical formulations to composite material *** efficient application as filler/additives incorporates the improvement in concomitant properties within materials,e.g.,strength,which involves interactions between talc particles and aqueous/nonaqueous *** property enhancement imposes ideal mixing and homogenous adhesion within a talc particle,but they are limited by the coexistence of face and edge surfaces of talc,which exhibit different level of ***,using atomic force microscopy force spectroscopy,we showed that although hydrophilic talc particles obtained from acid treatment or aminosilanization better adhered with materials representing a matrix,the anisotropic characters of the two surface types ***,the degree of talc’s surface anisotropy reduced with the surface hydrophobization by aliphatic methylsilanization,but followed by the decrease in *** ten-fold difference in Hamaker constants of the probe/talc surface interacting pairs,we showed that the adhesions resulted from van der Waals interactions that suggested the influence of surface *** insight from this work would provide grounds for strategies to modulate talc’s adhesion,hydrophobicity and surface uniformity.

关键词： Talc Atomic force microscopy Force spectroscopy Adhesion Surface

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

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materials Futures 2024年第2期3卷 131-140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

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Composite hollow fiber membranes of modified zeolite y for biogas upgrading 6

Composite hollow fiber membranes of modified zeolite y for b...

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6th Thailand International Nanotechnology Conference, NanoThailand 2018

作者： Wichidit, Thakorn Faungnawakij, Kajornsak Klaysom, Chalida Center of Excellence in Particle Technology and Material Processing Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok10330 Thailand Pathumthani12120 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 CO2 separation from CO2/CH4 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. © 2019 Elsevier Ltd.

关键词： Carbon dioxide

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Recent advances in functional utilisation of environmentally friendly and recyclable high-performance green biocomposites: A review

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Chinese Chemical Letters 2024年第4期35卷 73-85页

作者： Guiyang Zheng Xuelian Kang Haoran Ye Wei Fan Christian Sonne Su Shiung Lam Rock Keey Liew Changlei Xia Yang Shi Shengbo Ge Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China School of Textile Science and Engineering&Key Laboratory of Functional Textile Material and Product of Ministry of Education Xi'an Polytechnic UniversityXi'an 710048China Department of Bioscience Arctic Research Centre(ARC)Aarhus UniversityFrederiksborgvej 399PO Box 358DK-4000 RoskildeDenmark Sustainability Cluster School of EngineeringUniversity of Petroleum&Energy StudiesDehradunUttarakhand 248007India Higher Institution Centre of Excellence(HICoE) Institute of Tropical Aquaculture and Fisheries(AKUATROP)Universiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia Center for Transdisciplinary Research Saveetha Institute of Medical and Technical SciencesSaveetha UniversityChennai 600072India NV Western PLT Georgetown 10400PenangMalaysia Aerospace Kaitian Environmental Technology Co. Ltd.Changsha 410000China Hunan Hongsen Novel Material Technology Co. Ltd.Yiyang 413407China

Humans have relied on biomass for survival and development since the Stone Age. All aspects of human needs for materials are covered by tools, fuel, and buildings. Nowadays, metals and petroleum-based materials are widely used in highly developed industries. Unfortunately, environmental contamination and the loss of natural resources have led to the reemergence of biomass resources as efficient and sustainable energy sources. Notably, simple and direct applications can no longer meet the demand for functionalization, high performance of materials and construction materials. Therefore, it is imperative to modify biomass and combine its utilisation to produce functionalization and high performance materials. For example, construction materials with superior mechanical properties and water resistance can be produced by reinforcing fibres to facilitate crosslinking. Water-oil separation or adsorption effects of hydrogels and aerogels are determined by the porosity and lightness of biomass, biocomposite conductor is prepared by chimaeric conductive material. Here, we review the approaches that have been taken to devise an environmentally friendly yet fully recyclable and sustainable functionalised biocomposites from biomass and its potential directions for future research.

关键词： Biocomposite Renewable Sustainability Advanced functional material Pollution mitigation

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Potential Production of Carbon Nanotubes from Liquid Aromatic Hydrocarbons Over Fe and Ni on Alumina Powder Via Catalytic Chemical Vapor Deposition

SSRN

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SSRN 2023年

作者： Chaiwat, Weerawut San, Myat Thiri Prachakittikul, Pensiri Chainarong, Kanjanaphon Sripisarn, Tanaporn Kerdnawee, Konrat Suttiponparnit, Komkrit Charinpanitkul, Tawatchai Koo-Amornpattana, Wanida Srifa, Atthapon Ratchahat, Sakhon Department of Chemical Engineering Faculty of Engineering Mahidol University Nakhon Pathom73170 Thailand Division of Environmental Engineering and Disaster Management Mahidol University Kanchanaburi Campus Kanchanaburi71150 Thailand Environmental Research Technology Department Innovation Institute PTT Public Company Limited Wang Noi Ayutthaya13170 Thailand Center of Excellence on Particle Technology and Material Processing Faculty of Engineering Chulalongkorn University Pathumwan Bangkok10330 Thailand

In this study, liquid aromatic hydrocarbons of benzene, toluene, and xylene (BTX), which can be abundantly found in industrial waste oil and from pyrolysis of waste plastics, were used as carbon sources to produce carbon nanotubes (CNTs). CNTs were firstly synthesized from liquid benzene over powdered alumina (Al2O3) supported Fe and Ni catalysts at 700 to 850 °C via catalytic chemical vapor deposition (CCVD) method. It was found that, CNTs synthesized from Fe/Al2O3 resulted in significantly higher carbon yields at 1.0–5.6 wt% with relatively higher graphitization analyzed by Raman spectroscopy compared to those of Ni/Al2O3 with the yields only at 0.6–2.8 wt%. However, smaller sizes of CNTs at 20–29 nm could be produced from Ni/Al2O3 compared to 30–38 nm obtained from Fe/Al2O3 due to its smaller crystallite size of the initial catalyst confirmed by X-ray diffraction (XRD) analysis. For both catalysts, with increasing CCVD temperature, the yields tended to increase with a slight increase in CNT diameter and graphitization degree. The temperature of 800 °C was then chosen for further preliminary investigation on potential mass production of CNTs from BTX. By doubling the amount of catalysts from 1 g to 2 g, the CNT yield could be approximately twice achieved by maintaining its uniformity and quality because of remaining active sites of the catalysts. In addition, increasing the carbon atoms of aromatic hydrocarbons resulted in improved yields without changing the quality of CNTs. In brief, uniform CNTs with different ranges of quality in terms of size and graphitization using Fe or Ni catalysts on alumina powder can be potentially produced from mixture of liquid aromatic hydrocarbons such as BTX in a large-scale production. © 2023, The Authors. All rights reserved.

关键词： Toluene

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