Pure and Applied Chemistry最新文献_第6页

Cu(II) complexes using acylhydrazones or cyclen for biocidal antifouling coatings 使用酰肼或环烯的 Cu(II) 复合物用于杀菌防污涂料

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-05-03 DOI: 10.1515/pac-2024-0203

Hannah Robinson, Alison M. Daines, Amira Brackovic, D. Bradley G. Williams, Ian M. Sims, Simon F.R. Hinkley

{"title":"Cu(II) complexes using acylhydrazones or cyclen for biocidal antifouling coatings","authors":"Hannah Robinson, Alison M. Daines, Amira Brackovic, D. Bradley G. Williams, Ian M. Sims, Simon F.R. Hinkley","doi":"10.1515/pac-2024-0203","DOIUrl":"https://doi.org/10.1515/pac-2024-0203","url":null,"abstract":"Copper and copper-based compounds have broad spectrum antimicrobial activity, but concerns about leaching into the environment and toxicity on non-target organisms is leading the use of copper-based coatings being restricted. Our objective was to develop coatings that used the biocidal activity of copper, but with low negative impacts by reducing its leaching into the environment. This study reports the synthesis and characterisation of copper coordinating ligands, their formulation into coatings and testing of their antibacterial activity. A polyacylhydrazone and a series of simple acylhydrazones were synthesised and coordinated to Cu(II), but were considered unsuitable due to either their poor water-solubility or high levels of copper leaching. In an alternative approach, copper was successfully chelated to the tetraazamacrocycle, cyclen, and used to synthesise Cu(II)-cyclen functionalised silica particles, which were successfully combined with commercial paint formulations. These functionalised products showed poor antibacterial activity when incorporated into epoxy coatings, probably due to the low copper content of the formulations. However, these ligands may have other applications, such as removal of heavy metals from contaminated effluent steams.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140836556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Facile and green hydrothermal synthesis of MgAl/NiAl/ZnAl layered double hydroxide nanosheets: a physiochemical comparison MgAl/NiAl/ZnAl 层状双氢氧化物纳米片的简便绿色水热合成：理化比较

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-05-03 DOI: 10.1515/pac-2024-0014

Nur Alyaa Kamal, Noor Hidayah Pungot, Siti Kamilah Che Soh, Nazrizawati Ahmad Tajuddin

{"title":"Facile and green hydrothermal synthesis of MgAl/NiAl/ZnAl layered double hydroxide nanosheets: a physiochemical comparison","authors":"Nur Alyaa Kamal, Noor Hidayah Pungot, Siti Kamilah Che Soh, Nazrizawati Ahmad Tajuddin","doi":"10.1515/pac-2024-0014","DOIUrl":"https://doi.org/10.1515/pac-2024-0014","url":null,"abstract":"Layered double hydroxide (LDH) exhibits a remarkable trait referred to as the ‘memory effect,’ demonstrating its capacity to reconstruct its layered structure from calcined oxides through hydrothermal treatment. Its uniqueness has garnered significant interest from researchers in both industrial and academic domains. Various methods have been utilized to synthesize LDH but most LDH studies still utilize alkali precipitants which might taint the final LDH product. Thus, in this study, layered double hydroxides involving MgAl/NiAl/ZnAl were synthesized via an alkali-free hydrothermal approach in which the formed precipitates of LDH were thermally destroyed via calcination at 450 °C before undergoing a rehydration treatment at 110 °C for 24 h to restore its original structure. Particularly, the physiochemical properties of MgAl/NiAl/ZnAl LDH have been undertaken by multiple techniques such as Powder X-ray Diffraction (PXRD), thermogravimetric analysis (TGA), Brunauer-Emmett-Teller (BET), Field Emission Scanning Electron Microscope (FESEM) and Fourier-transform infrared spectroscopy (FTIR). The resultant products exhibited exceptional crystallinity, accompanied by notably larger crystallite sizes and crystallinity index, particularly post-hydrothermal treatment. Among the fresh and calcined products studied, those subjected to HTM (4:1) treatment demonstrated the highest specific surface area and crystallinity surpassing both the fresh and calcined samples. In essence, this research showcased how utilizing the hydrothermal approach resulted in the most substantial increase in crystallite size and specific surface area.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140836807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The past is the future: from natural acid-base indicators to natural reagents in sustainable analytical chemistry 过去就是未来：从天然酸碱指示剂到可持续分析化学中的天然试剂

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-05-02 DOI: 10.1515/pac-2024-0204

Siripat Suteerapataranon, Kanokwan Kiwfo, Pei Meng Woi, Chalermpong Saenjum, Kate Grudpan

{"title":"The past is the future: from natural acid-base indicators to natural reagents in sustainable analytical chemistry","authors":"Siripat Suteerapataranon, Kanokwan Kiwfo, Pei Meng Woi, Chalermpong Saenjum, Kate Grudpan","doi":"10.1515/pac-2024-0204","DOIUrl":"https://doi.org/10.1515/pac-2024-0204","url":null,"abstract":"This article reviews the use of natural resources in analytical chemistry throughout history. Plant extracts were employed as indicators in chemistry for identifying the acidity or alkalinity of liquids as early as the 1650s. Later, as the industrial revolution altered people’s lives, synthetic chemicals were used instead. Modern techniques of analysis have replaced conventional ones as a result of advancements in physics and technology. The industrial revolution was an era of excitement until the toxic pollutants released from industries severely damaged people and the environment. The concepts of green chemistry and green analytical chemistry were proposed as potential solutions to the problems. The use of natural extracts as chemical analysis reagents has been reconsidered recently as a sustainable alternative. While new technologies such as artificial intelligence (AI) will influence future trends in analytical chemistry development, the primary goal is to move toward sustainable analytical chemistry, which includes using natural reagents and reducing the amount of chemicals consumed and waste produced.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140836812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radionuclides in marine sediment 海洋沉积物中的放射性核素

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-04-30 DOI: 10.1515/pac-2023-0905

Fani Sakellariadou

引用次数: 0

One story as part of the Global Conversation on Sustainability: dye adsorption studies using a novel bio-derived calcite material 作为 "可持续发展全球对话 "一部分的一篇报道：使用新型生物方解石材料进行染料吸附研究

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-04-30 DOI: 10.1515/pac-2024-0209

Sachel Christian-Robinson, Francesca M. Kerton

{"title":"One story as part of the Global Conversation on Sustainability: dye adsorption studies using a novel bio-derived calcite material","authors":"Sachel Christian-Robinson, Francesca M. Kerton","doi":"10.1515/pac-2024-0209","DOIUrl":"https://doi.org/10.1515/pac-2024-0209","url":null,"abstract":"Many of the United Nations’ Sustainable Development Goals (SDGs) can be addressed through chemistry. Researchers at Memorial University of Newfoundland, Canada, have been sharing their stories on September 25 for the past two years through the Global Conversation on Sustainability. This article describes the details of one of these stories. As the global population increases, food production including aquaculture is increasing to provide for this. At the same time, this means more waste is produced. Waste from aquaculture is often overlooked as a source of valuable chemicals. By-products from farming blue mussels (Mytilus edulis) is dominated by shells rich in calcite. A ‘soft’ calcite material prepared from waste mussels, via a combination of heat and acetic acid treatment, was investigated for its adsorptive properties and its possible use in wastewater remediation. The adsorption of two cationic dyes, methylene blue and safranin-O, on this material were evaluated through isothermal and kinetic modelling. The adsorption systems for both methylene blue and safranin-O can best be described using Langmuir isotherms and the respective adsorption capacities were 1.81 and 1.51 mg/g. The adsorption process was dominated by pseudo-second order rate kinetics. Comparisons are made with other mollusc-derived materials reported to date.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140836805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Production of oil palm mesocarp fiber-based hydrogel using selected cross-linking acids 利用选定的交联酸生产油棕中果皮纤维水凝胶

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-04-30 DOI: 10.1515/pac-2024-0208

Soek Sin Teh, Harrison Lik Nang Lau, Siau Hui Mah

{"title":"Production of oil palm mesocarp fiber-based hydrogel using selected cross-linking acids","authors":"Soek Sin Teh, Harrison Lik Nang Lau, Siau Hui Mah","doi":"10.1515/pac-2024-0208","DOIUrl":"https://doi.org/10.1515/pac-2024-0208","url":null,"abstract":"Over the years, studies showed that hydrogels can be produced through synthetic route to overcome the limitations in obtaining natural-based hydrogels. Biomass resources offer potential alternatives as renewable feedstocks due to their outstanding biodegradability and biocompatibility. Oil palm mesocarp fiber (MF) is the biomass residue obtained after the pressing of palm fruits during palm oil extraction. There is approximately 11 % MF generated from palm fruits after oil extraction. However, the applications of MF are limited. This study aimed to investigate the development of hydrogels from holocellulose MF instead of commonly used cellulose which involving several pretreatment steps, through acid cross-linkers. Holocellulose MF was selected as polymer for chemical cross-linking with two inexpensive and nontoxic hydrophilic organic acids, citric acid and acetic acid for hydrogel production. Comparison study was carried out to evaluate the physicochemical properties, and degree of swelling, as well as gel content in different media for both acids in the production of hydrogel from holocellulose MF. Results indicated that the optimum concentrations of citric acid and acetic acid for gel content and degree of swelling were 5 M and 2 M, respectively. Both optimized hydrogels exhibited comparable profiles in terms of morphology, thermal stability and functional groups, in addition to showing similar degree of swelling profile in different media, i.e., salt solution, acidic, neutral to alkaline, implying their distinctive characteristics. In summary, holocellulose MF is suitable for the production of hydrogel with citric acid and acetic acid as crosslinkers for different desired applications.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140836809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Production of green hydrogen through PEM water electrolysis 通过 PEM 水电解法生产绿色氢气

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-04-30 DOI: 10.1515/pac-2023-1022

Shawn Gouws, Jason Mackay

{"title":"Production of green hydrogen through PEM water electrolysis","authors":"Shawn Gouws, Jason Mackay","doi":"10.1515/pac-2023-1022","DOIUrl":"https://doi.org/10.1515/pac-2023-1022","url":null,"abstract":"The need for abundant, sustainable, and clean energy is becoming increasingly important in the modern world due to continuous population growth and industrial expansion. Hydrogen (H2) has been identified as a potential energy carrier due to its high gravimetric energy density. Because H2 is not frequently found in its molecular form, it has to be obtained through various methods such as steam methane reforming, coal gasification, fossil fuels, and electrochemical techniques. H2 produced via PEMWE has proved to be an efficient method compared to other electrolysers. The limiting factor of a PEM electrolyser system is the OER catalyst. Commercially, IrO2 and RuO2 are used; however, both these metals are rare and expensive. Current research reports the use of binary metal oxides as an alternative OER catalyst to decrease the overall CAPEX costs. Various synthesis methods are available, with the Adams’ fusion method being the simplest. Characterisation techniques used to evaluate the performance of these catalysts include cyclic voltammetry (CV), linear scan voltammetry (LSV), XRD, XRF, SEM/EDS, and chronopotentiometry. Hydrogen as a clean fuel has a broad potential for use across all sectors, including transportation, residential, and industrial. In recent years, extensive research has been done on all aspects of hydrogen production, storage, and transportation. This review paper aims to study other bimetallic metals to reduce the Ir content used as an oxidative evolution reaction to reduce the capital cost of the PEM electrolyser. To produce green hydrogen that could reduce the carbon footprint in several industrial processes.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140836888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The virtual conference on chemistry and its applications, VCCA-2023, 7–11 August 2023 化学及其应用虚拟会议，VCCA-2023，2023 年 8 月 7-11 日

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-04-29 DOI: 10.1515/pac-2024-0226

Ponnadurai Ramasami

引用次数: 0

An innovative method using data acquisition and MATLAB for the electrochemical oxidation of formalin and the conversion of the oxidized products into a sound signal 利用数据采集和 MATLAB 对福尔马林进行电化学氧化并将氧化产物转化为声音信号的创新方法

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-04-26 DOI: 10.1515/pac-2023-1125

Gajalakshmi Duraikannu

{"title":"An innovative method using data acquisition and MATLAB for the electrochemical oxidation of formalin and the conversion of the oxidized products into a sound signal","authors":"Gajalakshmi Duraikannu","doi":"10.1515/pac-2023-1125","DOIUrl":"https://doi.org/10.1515/pac-2023-1125","url":null,"abstract":"\u0000 \u0000 Aim: Herein, the oxidation of chemical compounds as sound signals, prepared either by chemical, physical, mechanical, biological methods were reported. Objectives: To fabricate the synthesized material for example, nanoparticle, ceramic, electro catalyst as electrode, by mixing the synthesized material with a suitable binder or they may be mixed with a solvent to function as an electrolyte. In this case, 40 % formalin as electrolyte, platinum and calomel electrode as positive and negative electrodes respectively have been used to formulate an electrochemical cell. Methodology: This cell is connected with the sound card to process the sound signals and analyzed using Sig view software. The sound signals after noise deduction were further processed using MATLAB to get information about the signals. Results: For example, Frequency, Amplitude, etc. of those cells can be obtained. The FFT spectrum obtained by this method correlates well with the FTIR spectrum of formalin. Any Conductive chemical oxidation could be processed in this way and their chemical information could be digitized and saved in cloud.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140653130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biodegradable thermochromic polylactic acid (PLA) sensor 可生物降解的热致变色聚乳酸（PLA）传感器

IF 1.8 4区化学

Pure and Applied Chemistry Pub Date : 2024-04-24 DOI: 10.1515/pac-2024-0023

Q. Chan, Dai Lam Tran, K.I. Ku Marsilla

{"title":"Biodegradable thermochromic polylactic acid (PLA) sensor","authors":"Q. Chan, Dai Lam Tran, K.I. Ku Marsilla","doi":"10.1515/pac-2024-0023","DOIUrl":"https://doi.org/10.1515/pac-2024-0023","url":null,"abstract":"\u0000 This study investigates the development of polylactic acid (PLA) by incorporating thermochromic black pigments (TCB) at varying concentrations of 0, 0.5, 1, 2 and 3 wt% through the process of melt blending. The color transition and reversion behaviors of the resulting specimens were examined at different temperatures (−10, 10, 30, 35 and 50 °C) using colorimetric analysis. Additionally, mechanical properties, thermal characteristic and thermal stability were assessed through tensile testing, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), respectively. The study revealed that an increase in TCB concentrations led to a reduction in lightness (L*). Higher pigment content enhanced thermochromic properties, resulting in more pronounced color changes. The total color difference (ΔE) remained reproducible over five cycles of heating and freezing, and this reproducibility persisted after thermal aging. Tensile strength and elongation at break exhibited improvement with increasing pigment content. Glass transition temperature (Tg) and melting temperature (Tm) of the thermochromic samples showed minimal reduction compared to that of neat PLA, which is 64.2 °C. Crystallinity degree (Xc) increased slightly by 0.2–0.92 %. The thermal stability of the PLA matrix was only marginally affected by the presence of thermochromic pigments.","PeriodicalId":20911,"journal":{"name":"Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140664813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0