Materials Today Sustainability最新文献

Study on corrosion resistance and microstructure of modified sediment geopolymer materials 改性沉积土工聚合物材料的耐腐蚀性和微观结构研究

IF 7.1 3区材料科学

Materials Today Sustainability Pub Date : 2024-11-15 DOI: 10.1016/j.mtsust.2024.101048

Changming Li , Huilin Liu , Xiaoxiong Chai , Dongyang Jia , Yaozong Wang , Hui Liu , Xudong Yang , Guanfeng Liu , Wanjiao Li

{"title":"Study on corrosion resistance and microstructure of modified sediment geopolymer materials","authors":"Changming Li , Huilin Liu , Xiaoxiong Chai , Dongyang Jia , Yaozong Wang , Hui Liu , Xudong Yang , Guanfeng Liu , Wanjiao Li","doi":"10.1016/j.mtsust.2024.101048","DOIUrl":"10.1016/j.mtsust.2024.101048","url":null,"abstract":"<div><div>Utilizing sediment to manufacture geopolymer materials by alkali-activated modification is an eco-friendly and economical strategy. Investigating its corrosion resistance properties is crucial for enhancing the durability and structural stability of the materials and is the key to promoting their widespread application. In this paper, the combined effects of modifiers, mineral admixtures, and corrosion conditions on the corrosion resistance, mechanical strength, and microstructure of modified sediment geopolymer materials were thoroughly investigated. The mechanical properties of materials were evaluated by universal press, and the mineral composition and microstructure of the materials were analyzed by XRD, SEM and TG. The results reveal that the strength of the modified sediment material are significantly improved. The highest compressive strength of the modified sediment samples reached 15.84 MPa, which was much higher than that of the modified sediment samples without additives. The optimum softening coefficient of the sample is 0.79, and its water resistance is exceptional. The highest compressive strength reaches 15.04 MPa and 14.43 MPa respectively in acid and alkali environment, and its corrosion resistance is better than that of sediment materials without additives. The microstructure analyzed clearly indicated that the C–S–H gels, as the main hydration products, effectively promoted the close bonding of the sediment particles and filled the pores and microcracks inside the specimens, which significantly enhanced the strength and corrosion resistance of the material.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101048"},"PeriodicalIF":7.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cu-Bi2S3 nanorods promote reactive oxygen species production for photodynamic therapy of prostate cancer 铜-Bi2S3 纳米棒促进活性氧生成，用于前列腺癌的光动力疗法

IF 7.1 3区材料科学

Materials Today Sustainability Pub Date : 2024-11-14 DOI: 10.1016/j.mtsust.2024.101047

Jiacheng Ling , Rongrong Gu , Junchao Wu , Hualong Li , Yuanxi Lin , Yang Hou , Xiaoyi Huang , Ruixi Chu , Tao Xu , Sheng Ye , Song Fan

{"title":"Cu-Bi2S3 nanorods promote reactive oxygen species production for photodynamic therapy of prostate cancer","authors":"Jiacheng Ling , Rongrong Gu , Junchao Wu , Hualong Li , Yuanxi Lin , Yang Hou , Xiaoyi Huang , Ruixi Chu , Tao Xu , Sheng Ye , Song Fan","doi":"10.1016/j.mtsust.2024.101047","DOIUrl":"10.1016/j.mtsust.2024.101047","url":null,"abstract":"<div><div>Photodynamic therapy (PDT) has emerged as a promising cancer treatment approach due to its non-invasive and specifically targeted nature. However, the effectiveness of PDT is hindered by the complex synthesis of conventional photosensitizers and inadequate reactive oxygen species (ROS) generation. Here, we synthesize a copper-doped Bi<sub>2</sub>S<sub>3</sub> (Cu-Bi<sub>2</sub>S<sub>3</sub>) nanorod to investigate its PDT potential against PCa. Compared with bulk Bi<sub>2</sub>S<sub>3</sub> (58%), Cu-Bi<sub>2</sub>S<sub>3</sub> nanorod caused 87% of PC3 cells to die under light. The dispersed Cu in the Bi<sub>2</sub>S<sub>3</sub> bulk phase effectively inhibits the recombination of photogenerated electron-hole pairs, ultimately providing a high concentration of charge carriers. DFT calculations show that Cu doping causes the d-band center of Cu-Bi<sub>2</sub>S<sub>3</sub>, promoting the adsorption and activation of O<sub>2</sub> on Cu-Bi<sub>2</sub>S<sub>3</sub> to enhance ROS generation. This work offers a viable solution to the pressing scientific challenge of ROS generation, a key aspect of enhancing the efficacy of PDT for cancer treatment.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101047"},"PeriodicalIF":7.1,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The interfacial charge change enhanced by Pr0.6Sm0.4Co0·8Mn0·2O3 activated peroxymonosulfate was used for the efficient degradation of tetracycline under the nanoscale domain limiting and distance effect 在纳米尺度畴限制和距离效应下，Pr0.6Sm0.4Co0-8Mn0-2O3活化过硫酸盐增强的界面电荷变化被用于高效降解四环素

IF 7.1 3区材料科学

Materials Today Sustainability Pub Date : 2024-11-12 DOI: 10.1016/j.mtsust.2024.101044

Xiayan Zhang , Zhi Song , Boxia Liu , Bofei Liu , Jialu Liu , Jinrong Lu , Cheng Li , Yeqiong Huang , Dongxu Han , Jingjing Yang , Hua Liu

{"title":"The interfacial charge change enhanced by Pr0.6Sm0.4Co0·8Mn0·2O3 activated peroxymonosulfate was used for the efficient degradation of tetracycline under the nanoscale domain limiting and distance effect","authors":"Xiayan Zhang , Zhi Song , Boxia Liu , Bofei Liu , Jialu Liu , Jinrong Lu , Cheng Li , Yeqiong Huang , Dongxu Han , Jingjing Yang , Hua Liu","doi":"10.1016/j.mtsust.2024.101044","DOIUrl":"10.1016/j.mtsust.2024.101044","url":null,"abstract":"<div><div>In this work, an improved sol-gel method was used to prepare a series of Co-infused PrSmMnO<sub>3</sub> perovskites (Pr<sub>0.6</sub>Sm<sub>0.4</sub>Co<sub>1-X</sub>Mn<sub>X</sub>O<sub>3</sub>, PSCM) to rapidly activate peroxymonosulfate (PMS) for efficient degradation of tetracycline (TC). The experimental results showed that the degradation efficiency of the PSCM-82/PMS system for TC in the pH 2–11 range was close to 100%. The nanoscale domain-limiting and distance effect of PSCM under different activators were discussed, and the catalytic mechanism of the non-radical electron transfer pathway in the PSCM-82/PMS system was proposed. After the optimization of the DFT calculation, it can be seen that the <em>d</em><sub>Co-Mn-Co</sub> range of the PSCM-82 material is 9.8–9.9 Å. The molecular size of PMS is 9.9 Å, which precisely matches the <em>d</em><sub>Co-Mn-Co</sub> range of the material. Moreover, the distance between molecular sizes was relatively minimal, and the interface charge transfer was enhanced by both the confinement and distance effects. This promotes a fast catalytic reaction and an optimal degradation rate. During this process, PMS molecules were adsorbed by the active metal sites on the surface of PSCM-82, resulting in a large amount of interfacial charge transfer. This allows a strong coupling between the PMS and the catalyst, resulting in a reaction surface with high redox potential. According to the results of density functional theory (DFT) calculation, quenching experiment, electron paramagnetic resonance (EPR) experiment and electrochemical research, it can be concluded that the main degradation pathway of TC is realized through the direct electron transfer process.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101044"},"PeriodicalIF":7.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transition metal atoms embedded graphyne as effective catalysts for nitrate electroreduction to ammonia: A theoretical study 嵌入石墨烯的过渡金属原子是硝酸盐电还原成氨的有效催化剂：理论研究

IF 7.1 3区材料科学

Materials Today Sustainability Pub Date : 2024-11-12 DOI: 10.1016/j.mtsust.2024.101045

Donghui Zhang, Jingwei Liu, Jingxiang Zhao

{"title":"Transition metal atoms embedded graphyne as effective catalysts for nitrate electroreduction to ammonia: A theoretical study","authors":"Donghui Zhang, Jingwei Liu, Jingxiang Zhao","doi":"10.1016/j.mtsust.2024.101045","DOIUrl":"10.1016/j.mtsust.2024.101045","url":null,"abstract":"<div><div>Electrocatalytic nitrate reduction reaction (NO<sub>3</sub>RR) to ammonia has been proved to be a viable approach to dispose of nitrates pollution and simultaneously fabricate valuable ammonia at room temperature and pressure. It is essential to explore high-performance and selective electrocatalysts for NO<sub>3</sub>RR to overcome the sluggish kinetics. Herein, through adopting a four-step screening route based upon the calculation of density functional theory (DFT), we have performed a comprehensive investigation on the NO<sub>3</sub>RR catalytic activities for single-atom catalysts (SACs), taking transition metal atom embedded graphyne (TM-GY, TM = 3d ∼ 5d) as example. The computation results show that the electrochemical conversion of nitrate-to-ammonia can be realized on Cr-GY candidate with an extremely low limiting potential (−0.36 V) and high selectivity, which can be ascribed to the moderate adsorption strength between the intermediate species and Cr atom derived from its distinct electronic property. Our study not only reveals the NO<sub>3</sub>RR catalytic origin of TM-GY, but also provides a new route for the rational design of electrocatalysts for nitrate reduction to ammonia.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101045"},"PeriodicalIF":7.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of biobased poly(ether-ester) from potentially bioproduced betulin and p-coumaric acid 利用潜在生物生产的白桦脂素和对香豆酸合成生物基聚醚酯

IF 7.1 3区材料科学

Materials Today Sustainability Pub Date : 2024-11-07 DOI: 10.1016/j.mtsust.2024.101039

Théo Guérin, Eric Pollet, Luc Avérous

{"title":"Synthesis of biobased poly(ether-ester) from potentially bioproduced betulin and p-coumaric acid","authors":"Théo Guérin, Eric Pollet, Luc Avérous","doi":"10.1016/j.mtsust.2024.101039","DOIUrl":"10.1016/j.mtsust.2024.101039","url":null,"abstract":"<div><div>For a more sustainable future, innovative polymer materials synthesized from biobased molecules are currently a key trend, in the frame of the bioeconomy. In this study, new renewable macromolecular architectures poly(ether-esters) has been synthesized from betulin and <em>para</em>-coumaric acid, two plant-based building blocks, poorly valorized till now, and potentially bioproduced by white biotechnologies. To date, these are the first synthesized polymers with such a reported architecture. In a first step, different chemical modifications were carried out on these biomolecules to increase their reactivities. Betulin hydroxyl groups were esterified with aliphatic acids of carbon chain lengths C6, C8 and C10 terminated by a bromine, with good yields (79–85%). <em>P</em>-coumaric acid was dimerized by [2 + 2] cycloaddition, and then esterified with ethanol, butanol or isobutanol with excellent yields (92–96%). These modified building blocks were finally copolymerized by Williamson polyetherification reaction, leading to various analogous materials with molar masses ranging from 9700 to 15500 g mol<sup>−1</sup>. Different thermal characterizations have been then performed. TGA results show that these poly(ether-esters) displayed high thermal stabilities (up to 336 °C). Besides, DSC analyses revealed T<sub>g</sub> ranging from 38 to 81 °C, depending on the length of the aliphatic carbon chain and the nature of the pendant ester groups for a large range of potential applications.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101039"},"PeriodicalIF":7.1,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent advances in transition metal-based photocatalytic heterojunctions for algal inhibition and water disinfection: A review 用于抑制藻类和水消毒的过渡金属基光催化异质结的最新进展：综述

IF 7.1 3区材料科学

Materials Today Sustainability Pub Date : 2024-11-07 DOI: 10.1016/j.mtsust.2024.101041

Yaksha Verma , Gaurav Sharma , Jibran Iqbal , Mu. Naushad , Chin Wei Lai , Amit Kumar , Pooja Dhiman , Ackmez Mudhoo

{"title":"Recent advances in transition metal-based photocatalytic heterojunctions for algal inhibition and water disinfection: A review","authors":"Yaksha Verma , Gaurav Sharma , Jibran Iqbal , Mu. Naushad , Chin Wei Lai , Amit Kumar , Pooja Dhiman , Ackmez Mudhoo","doi":"10.1016/j.mtsust.2024.101041","DOIUrl":"10.1016/j.mtsust.2024.101041","url":null,"abstract":"<div><div>Sustainable energy production and effective water pollution control are critical global priorities. Harmful algal blooms (HABs) and waterborne pathogens pose significant threats to water quality and public health, necessitating efficient and eco-friendly treatment methods. Transition metal-based photocatalytic heterojunctions offer promising solutions by leveraging the unique properties of transition metals to enhance photocatalytic efficiency. This review examines recent advances in these heterojunctions employed for algal inhibition and water disinfection, discussing various heterojunction type (including conventional, p-n, Z-scheme, <em>S</em>-scheme, and Schottky heterojunctions), and their synthesis methods. We elucidate the mechanisms involved, highlighting improved electron transfer, reduced recombination rates, and broadened light absorption. Recent studies on their effectiveness in inhibiting harmful algae and disinfecting water are also reviewed. Current challenges and future research directions to optimize these materials are identified. This is a first comprehensive overview focusing on the contributions of transition metals in photocatalytic heterojunctions for water treatment, aiming to support the development of sustainable technologies.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101041"},"PeriodicalIF":7.1,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aerogels for sustainable CO2 electroreduction to value-added chemicals 可持续二氧化碳电还原为高附加值化学品的气凝胶

IF 7.1 3区材料科学

Materials Today Sustainability Pub Date : 2024-11-06 DOI: 10.1016/j.mtsust.2024.101038

Shenglin Yan , Samah A. Mahyoub , Yanran Cui , Qiong Wang , Zhenglong Li

{"title":"Aerogels for sustainable CO2 electroreduction to value-added chemicals","authors":"Shenglin Yan , Samah A. Mahyoub , Yanran Cui , Qiong Wang , Zhenglong Li","doi":"10.1016/j.mtsust.2024.101038","DOIUrl":"10.1016/j.mtsust.2024.101038","url":null,"abstract":"<div><div>Carbon dioxide electrochemical reduction (CO<sub>2</sub>ER) affords an appealing pathway for transforming discarded CO<sub>2</sub> to fuels and economic chemicals. Various nanocatalysts have been used for CO<sub>2</sub>ER, of which porous catalysts have attracted widespread attentions because of their large electrochemically active surface area, large number of pores for molecule transportation, and high local pH. Aerogels (including carbon-based aerogels and metallic aerogels), as a new class of porous catalysts, have been applied to CO<sub>2</sub>ER in recent years because of their high electrical conductivity (to reduce overpotential), three-dimensional porous structure and intrinsic hydrophobicity (to inhibit parasitic hydrogen evolution reaction, HER). In this article, we reviewed latest progresses toward aerogels for CO<sub>2</sub>ER, including (1) synthesis strategies of carbon-based aerogels and metallic aerogels; (2) innovations in aerogels design, such as heteroatom doping and metal incorporation in carbon-based aerogel, creating grain boundaries, regulating Cu<sup>0</sup>–Cu<sup>+</sup> interfaces, and optimizing synergistic effect in metal aerogels; and (3) structural properties of aerogel catalysts to enhance CO<sub>2</sub>ER performance. Finally, we discuss the challenges, possible solutions and future directions for further development of aerogels in CO<sub>2</sub>ER.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101038"},"PeriodicalIF":7.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetic activated carbonaceous materials from sugarcane bagasse: Preparation, characterization, and hexavalent chromium removal 甘蔗渣磁性活性炭材料：制备、表征和六价铬去除

IF 7.1 3区材料科学

Materials Today Sustainability Pub Date : 2024-11-06 DOI: 10.1016/j.mtsust.2024.101040

Gabriela A. Nogueira , Laís G. Fregolente , Lorena S. Pereira , Márcio J. Laranja , Altair B. Moreira , Odair P. Ferreira , Márcia C. Bisinoti

{"title":"Magnetic activated carbonaceous materials from sugarcane bagasse: Preparation, characterization, and hexavalent chromium removal","authors":"Gabriela A. Nogueira , Laís G. Fregolente , Lorena S. Pereira , Márcio J. Laranja , Altair B. Moreira , Odair P. Ferreira , Márcia C. Bisinoti","doi":"10.1016/j.mtsust.2024.101040","DOIUrl":"10.1016/j.mtsust.2024.101040","url":null,"abstract":"<div><div>The presence of hexavalent chromium (Cr (VI)) in effluents remains a global concern due to its toxic properties. Even though adsorption has been employed for its removal from water, developing sustainable materials with higher adsorption capacities is still pivotal to tackling such contamination. In this study, two magnetic carbons (MC) were produced by hydrothermal carbonization (HTC) of sugarcane bagasse in the presence of iron (III) nitrate at 230 and 270 °C. Both MCs were thermochemically activated at 500 and 700 °C using KOH (1:2; w:w). The materials were characterized in terms of composition, structure, morphology, texture, and surface properties and then evaluated in adsorption studies of Cr (VI). After HTC, some iron phases such as α-Fe<sub>2</sub>O<sub>3</sub>, γ-Fe<sub>2</sub>O<sub>3</sub>, and Fe<sub>3</sub>O<sub>4</sub> were observed, while thermochemical activation additionally revealed Fe<sup>0</sup> and Fe<sub>4</sub>[Fe(CN)<sub>6</sub>]<sub>3</sub>. Activation increased the amount of meso- and macropores, specific surface area, pH<sub>zpc</sub>, surface hydrophilicity, and carbon and nitrogen contents. The adsorption kinetics study indicated that the pseudo-second-order model describes better the behavior of the materials. The investigation of adsorbent dose showed that doses below 1.00 g L<sup>−1</sup> were more efficient in Cr (VI) removal. MC-230 and MC-270 thermochemically activated at 700 °C exhibited the highest Cr (VI) adsorption capacities (10.5 and 15.5 mg g<sup>−1</sup>, respectively). Therefore, the improved adsorption capacity for Cr (VI) of the materials thermochemically activated at 700 °C was mainly due to their enhanced textural properties.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101040"},"PeriodicalIF":7.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Micro/meso scales characterization of alkali-activated fly ash-slag concrete under sustained high-temperatures with X-CT, MIP, and SEM tests 通过 X-CT、MIP 和 SEM 试验表征持续高温条件下碱激活粉煤灰-矿渣混凝土的微观/宏观尺度特性

IF 7.1 3区材料科学

Materials Today Sustainability Pub Date : 2024-11-01 DOI: 10.1016/j.mtsust.2024.101036

Hongqiang Ma , Congcong Fu , Jialong Wu , Xinhua Yuan , Chao Wu , Jingjing Feng

{"title":"Micro/meso scales characterization of alkali-activated fly ash-slag concrete under sustained high-temperatures with X-CT, MIP, and SEM tests","authors":"Hongqiang Ma , Congcong Fu , Jialong Wu , Xinhua Yuan , Chao Wu , Jingjing Feng","doi":"10.1016/j.mtsust.2024.101036","DOIUrl":"10.1016/j.mtsust.2024.101036","url":null,"abstract":"<div><div>Based on X-CT, MIP, and SEM tests, the micro/meso scales evolutions of alkali-activated fly ash-slag (AAFS) concrete under sustained high temperatures are studied. The results show that the water loss of the C–S–H and C-A-S-H gel phases at 60 °C is continuous (about 60d). The variation law of meso-scale pore volume based on the X-CT test is consistent with that of micro-scale pore volume obtained by the MIP test. The 2D fractal dimension can be used to qualitatively evaluate the internal micro-cracks and microstructure complexity of AAFS concrete after sustained high-temperature action. The mass loss rate can reach stability within 3d-7d under the action of 100 °C, 150 °C, and 200 °C, and there is no cumulative effect of micro-cracks and pores caused by initial water loss. Under sustained high-temperatures, the internal pore structure, micro-cracks, and microstructure changes of AAFS concrete are persistent, and these persistent changes lead to a significant change in the mechanical properties of AAFS concrete.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101036"},"PeriodicalIF":7.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of silver and graphitic carbon nitride doped cadmium selenide quantum dots as an efficient dye degrader and antibacterial agent: In silico molecular docking analysis 评估银和氮化石墨碳掺杂硒化镉量子点作为高效染料降解剂和抗菌剂的性能：硅学分子对接分析

IF 7.1 3区材料科学

Materials Today Sustainability Pub Date : 2024-10-29 DOI: 10.1016/j.mtsust.2024.101030

Umm-e Rubab , Ali Haider , Iram Shahzadi , Anwar Ul-Hamid , Hameed Ullah , Sherdil Khan , Atif Shahbaz , Ahmed M. Fouda , Muhammad Ikram

{"title":"Assessment of silver and graphitic carbon nitride doped cadmium selenide quantum dots as an efficient dye degrader and antibacterial agent: In silico molecular docking analysis","authors":"Umm-e Rubab , Ali Haider , Iram Shahzadi , Anwar Ul-Hamid , Hameed Ullah , Sherdil Khan , Atif Shahbaz , Ahmed M. Fouda , Muhammad Ikram","doi":"10.1016/j.mtsust.2024.101030","DOIUrl":"10.1016/j.mtsust.2024.101030","url":null,"abstract":"<div><div>This study demonstrates the synthesis of co-precipitated cadmium selenide (CdSe) quantum dots (QDs) doped with (2 and 4 wt %) of silver (Ag) and fixed quantity of graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) for catalytic as well as antibacterial potential with molecular docking (MD) analysis. Comprehensive characterizations investigated the structural composition, surface morphology, elemental composition, and optical properties. XRD revealed the multiple phases (hexagonal and cubic) of CdSe with a notable rise in the diffraction peaks intensity upon doping. The optical studies demonstrated the range of absorption peaks, which increased upon doping confirmed through band gap energies significantly altered. TEM study revealed that a sheet of g-C<sub>3</sub>N<sub>4</sub> overlapped with CdSe QDs, and certain nanorod-like structures emerged after Ag doping. HR-TEM was employed for the d-spacing computation of prepared samples and exposed a decreasing trend as the Ag concentration increased. Furthermore, the catalytic activity (CA) performed against RhB dye showed maximum results in the acidic medium with a higher concentration of Ag into g-C<sub>3</sub>N<sub>4</sub> doped CdSe. The efficient bactericidal efficacy was evaluated against <em>S. aureus</em> bacteria with the highest inhibition zone of 13.75 mm for 4% Ag doping, which was further explained by investigating their inhibitory effects on DNA gyrase and tyrosyl-tRNA synthetase via MD.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101030"},"PeriodicalIF":7.1,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0