JST: Engineering and Technology for Sustainable Development最新文献_第6页

Study to Evaluate Photocatalytic Decomposition of Several Organic Compounds and Self-Cleaning Ability of Fabrics Containing ZnO 含ZnO织物的光催化分解及自洁性能研究

JST: Engineering and Technology for Sustainable Development Pub Date : 2022-11-15 DOI: 10.51316/jst.162.etsd.2022.32.5.5

{"title":"Study to Evaluate Photocatalytic Decomposition of Several Organic Compounds and Self-Cleaning Ability of Fabrics Containing ZnO","authors":"","doi":"10.51316/jst.162.etsd.2022.32.5.5","DOIUrl":"https://doi.org/10.51316/jst.162.etsd.2022.32.5.5","url":null,"abstract":"ZnO's ability to decompose organic substances is receiving much attention in multiple applications. ZnO has a broad spectrum of light absorption natural or synthetic, for a wide range of wavelengths, and is an important material with excellent properties, environmentally friendly, nontoxic, inexpensive, and high redox potential features with simple manufacturing methods. In this study, zinc oxide nanoparticles were synthesized by precipitation method with the participation of precursors (CH3COO)2Zn.2H2O and KOH. The surface morphology, chemical properties, and chemical composition of the ZnO catalyst were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy, and Energy-Dispersive X-ray Spectroscopy (SEM-EDS). The photocatalytic activity of ZnO was evaluated with the color change of methylene blue (MB), methylene orange (MO), and diluted coffee solutions. The results show that ZnO has a high photocatalytic activity with a decomposition ability of over 90% for MO and MB pigments, and over 40% for a coffee solution when irradiated under ultraviolet light. This study's cotton fabric impregnated with ZnO showed good self-cleaning effects against organic pigments, which are MB, MO, and coffee. The results were demonstrated by the color changes over a 19-h period of time.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79319241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Survey of Co-Combustion and Gasification of Biomass Furnace 生物质炉共燃气化实验研究

JST: Engineering and Technology for Sustainable Development Pub Date : 2022-11-15 DOI: 10.51316/jst.162.etsd.2022.32.5.8

{"title":"Experimental Survey of Co-Combustion and Gasification of Biomass Furnace","authors":"","doi":"10.51316/jst.162.etsd.2022.32.5.8","DOIUrl":"https://doi.org/10.51316/jst.162.etsd.2022.32.5.8","url":null,"abstract":"When researching, designing and manufacturing a model of Co-combustion and gasification of biomass furnace with the goal of achieving the amount of air supplied for the combustion process, here the first stage is combustion/burning process, so there is excess oxygen, which means excess air  > 1.The next stage is gasification, i.e. anaerobic combustion, so the oxygen content of the combustion process is anoxic, which means that the excess air is  < 1. It is the combination of such simultaneous combustion and gasification that the energy conversion process will achieve higher thermal efficiency. In this report, we present a summary of experimental research results on the \"model\" of the furnace and simultaneous gasification, the results of evaluating the quality of the gas generated from the combustion process, the achieved flame temperature inside the furnace, the heat capacity of the furnace and the selection of the air flow provided for the combustion process. With the type of furnace and gasifier at the same time in this research, it can be used for drying agricultural products of household scale, or group of households, or used for medium scale at agricultural product processing establishments/enterprises and suitable for rural and/or mountainous conditions in Vietnam.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77237658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Selection of Sheath Voltage Limiter for Mixed Overhead-Underground Cable in 220 kV Transmission Lines 220kv输电线路架空混合电缆护套限压器的选用

JST: Engineering and Technology for Sustainable Development Pub Date : 2022-10-15 DOI: 10.51316/jst.161.etsd.2022.32.4.10

引用次数: 0

Effects of Triisopropanolamine and Triethanolamine on Some Properties of Portland Cement 三异丙醇胺和三乙醇胺对硅酸盐水泥某些性能的影响

JST: Engineering and Technology for Sustainable Development Pub Date : 2022-10-15 DOI: 10.51316/jst.161.etsd.2022.32.4.5

引用次数: 0

Influence of Temperature and pH Conditions on the Swelling Properties of Rice Straw Derived Cellulose Hydrogel 温度和pH条件对稻草纤维素水凝胶溶胀性能的影响

JST: Engineering and Technology for Sustainable Development Pub Date : 2022-10-15 DOI: 10.51316/jst.161.etsd.2022.32.4.4

{"title":"Influence of Temperature and pH Conditions on the Swelling Properties of Rice Straw Derived Cellulose Hydrogel","authors":"","doi":"10.51316/jst.161.etsd.2022.32.4.4","DOIUrl":"https://doi.org/10.51316/jst.161.etsd.2022.32.4.4","url":null,"abstract":"Cellulose, one of the renewable and biodegradable polymers, has been extensively studied as a raw material for a newly and fully bio-based hydrogel. The synthesis of bio-hydrogel is based on the dissolution of extracted cellulose from rice straw in tetrabutylphosphonium hydroxide (TBPH) solvent followed by the gelation using epichlorohydrin (ECH) crosslinkers. The success of the extraction of cellulose from rice straw was evaluated by characteristic peaks of cellulose in Fourier Transform Infrared Spectroscopy (FTIR) spectrum. The hydrogel formation mechanism was investigated in this article, as well as the evaluation of swelling properties under different temperature and pH conditions. As hydrogel exhibited thermal and pH sensitive behavior, the highest swelling capacity was found at pH 7.0 and 60 ºC. The characterization of hydrogel was examined by Fourier Transform Infrared Spectroscopy (FTIR) and thermal analysis (TGA), indicating that the rice straw derived cellulose hydrogel was cellulose type II, similar to others hydrogels. The morphology of extracted cellulose and hydrogel were investigated by Scanning Electron Microscope (SEM). The hydrogel exhibited porousity structure with very large pore size that surrounded by cellulose/ECH layers. The purity of the hydrogel was determined through the amount of water immersed in the hydrogel for one day by Liquid Nuclear Magnetic Resonance (NMR) for the residual TBPH determination.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84888649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of the Matrix Shrinkage on a Polymer Matrix Composite under a Drop of Temperature 温度下降下聚合物基复合材料基体收缩的研究

JST: Engineering and Technology for Sustainable Development Pub Date : 2022-10-15 DOI: 10.51316/jst.161.etsd.2022.32.4.8

引用次数: 0

Fabrication of Superhydrophobic Copper via Chemical Etching and Modification 化学蚀刻及改性制备超疏水铜

JST: Engineering and Technology for Sustainable Development Pub Date : 2022-10-15 DOI: 10.51316/jst.161.etsd.2022.32.4.1

{"title":"Fabrication of Superhydrophobic Copper via Chemical Etching and Modification","authors":"","doi":"10.51316/jst.161.etsd.2022.32.4.1","DOIUrl":"https://doi.org/10.51316/jst.161.etsd.2022.32.4.1","url":null,"abstract":"Biological superhydrophobic surfaces are relatively common in nature. Inspired by the superhydrophobic feature, plentiful materials with hydrophobic surfaces have been fabricated for various purposes such as anti-corrosion, anti-icing, self-cleaning, friction reduction, and oil-water separation. In the present work, we report a scalable, simple, and rapid method to fabricate superhydrophobic film on copper substrates via a simple route including a chemical etching step in sodium persulfate and sodium hydroxide solution and followed by a modification step in stearic acid solution. The effect of the etchants concentration as well as etching time was investigated exhaustively. From the obtained results it was found that when a copper plate was etched in an etching solution with low etchant concentration, the contact angle of copper was greatly influenced by etching time. In contrast, the etching time hardly affected the contact angle of the copper plate at the high concentration of the etchants. The superhydrophobic feature of the copper surface (with a contact angle larger than 150o) was only achieved in certain fabrication conditions. The superhydrophobic copper substrates demonstrated good anti-corrosion properties. The corrosion current density of superhydrophobic copper substrates was 85 times smaller than that of pristine ones when manufactured under optimal conditions. In addition, the as-prepared superhydrophobic copper mesh was used to successfully separate toluene from its aqueous mixture. The superhydrophobic copper has great potential for applications in oil-water separation and anti-corrosion in aqueous environments.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83446449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cloning and Expression of a Recombinant NS1 Antigen from a Dengue 3 Serotype Viral Isolate in Escherichia Coli 登革3型大肠杆菌血清型病毒分离物重组NS1抗原的克隆与表达

JST: Engineering and Technology for Sustainable Development Pub Date : 2022-10-15 DOI: 10.51316/jst.161.etsd.2022.32.4.7

{"title":"Cloning and Expression of a Recombinant NS1 Antigen from a Dengue 3 Serotype Viral Isolate in Escherichia Coli","authors":"","doi":"10.51316/jst.161.etsd.2022.32.4.7","DOIUrl":"https://doi.org/10.51316/jst.161.etsd.2022.32.4.7","url":null,"abstract":"Dengue is a dangerous infectious disease affecting more than half of the global population living in areas at risk of dengue. This disease is caused by infection with dengue virus (DENV) through the bite of infected female mosquitos. Detection of the dengue virus infection could be performed by virus isolation, molecular biology methods, or by immunology methods. Non-structural protein 1 (NS1) has been considered as a diagnostic marker for detection of dengue virus infection. In this study, the full length NS1 region from DENV serotype 3 was cloned in vectors to generate the recombinant constructs of pCR::DENV-3 ns1 and pET::DENV-3 ns1. The rNS1 protein was expressed successfully in E. coli BL21(DE3) and confirmed by Western blot. Optimal conditions for expression of rNS1 were established. The highest level of protein expression was achieved at induction conditions of 0.05 mM IPTG inducer, 2% ethanol, and 37 oC for 4 hours. The rNS1 protein was successfully purified by immobilized metal affinity chromatography. Obtained pure rNS1 could be used for further studies in the development of vaccine and diagnostic tools.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88658794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metal-Film-Coated Silica Nanoparticle Monolayers for Application in Surface Enhanced Raman Scattering 金属膜包覆二氧化硅纳米颗粒单层膜在表面增强拉曼散射中的应用

JST: Engineering and Technology for Sustainable Development Pub Date : 2022-10-15 DOI: 10.51316/jst.161.etsd.2022.32.4.9

引用次数: 0

Evaluation of Height Equivalent Theoretical Plate of Packing Distillation Column for Benzaldehyde Purification Processing 苯甲醛净化填料精馏塔高度等效理论板的评价

JST: Engineering and Technology for Sustainable Development Pub Date : 2022-10-15 DOI: 10.51316/jst.161.etsd.2022.32.4.3

引用次数: 0