Applied Clay Science最新文献

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Compressive strength of clay-based geopolymers: A concise review of the influencing factors and underlying mechanisms 粘土基地聚合物的抗压强度:影响因素和潜在机制的简要综述
IF 5.8 2区 地球科学
Applied Clay Science Pub Date : 2025-09-26 DOI: 10.1016/j.clay.2025.107985
Shoaib Hassan , Mineesha Sivakumar , Ayokunle Odunayo Alade , Shangeetha Ganesan , Mazidatulakmam Miskam
{"title":"Compressive strength of clay-based geopolymers: A concise review of the influencing factors and underlying mechanisms","authors":"Shoaib Hassan ,&nbsp;Mineesha Sivakumar ,&nbsp;Ayokunle Odunayo Alade ,&nbsp;Shangeetha Ganesan ,&nbsp;Mazidatulakmam Miskam","doi":"10.1016/j.clay.2025.107985","DOIUrl":"10.1016/j.clay.2025.107985","url":null,"abstract":"<div><div>Geopolymer is a green inorganic polymer that is produced by using aluminosilicate materials, such as clay materials and industrial by-products in a highly alkaline environment. In recent years, clay had been widely used in the manufacturing of ceramics and building construction. The use of clay in geopolymer production not only reduces the environmental impact of traditional cement production, but also provides a sustainable alternative for various construction applications. Its versatility and cost-effectiveness make it an attractive option for industries looking to reduce their carbon footprint. This review is mainly focused on factors that influence the strength of clay-based geopolymers. Several factors, such as clay type, alkaline activator solution, aggregates, system ratio, curing temperature and time were discussed. The review also included mechanism of geopolymerization reaction. Overall, a combination of the appropriate clay type, aggregates, curing conditions, and activator solution is essential in achieving a high strength in geopolymers. Additionally, emerging reinforcement strategies such as nanomaterials, hybrid binders and fiber reinforcements are also discussed in context of mechanical behaviour of clay-based geopolymer.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"278 ","pages":"Article 107985"},"PeriodicalIF":5.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced dispersion of mixed-dimensional palygorskite clay via high-pressure homogenization and its synergistic reinforcement in chitosan composites 高压均质增强混维坡筋土在壳聚糖复合材料中的分散及其协同增强
IF 5.8 2区 地球科学
Applied Clay Science Pub Date : 2025-09-26 DOI: 10.1016/j.clay.2025.108000
Yushen Lu , Bin Mu , Yuru Kang , Wenting Gao , Aiqin Wang
{"title":"Enhanced dispersion of mixed-dimensional palygorskite clay via high-pressure homogenization and its synergistic reinforcement in chitosan composites","authors":"Yushen Lu ,&nbsp;Bin Mu ,&nbsp;Yuru Kang ,&nbsp;Wenting Gao ,&nbsp;Aiqin Wang","doi":"10.1016/j.clay.2025.108000","DOIUrl":"10.1016/j.clay.2025.108000","url":null,"abstract":"<div><div>The nanoscale structural characteristics of natural mixed-dimensional palygorskite clay (MDPal) are limited during applications due to the tight interlacing and aggregation of one-dimensional palygorskite nanorods and two-dimensional layered clay mineral nanosheets. In this study, high-pressure homogenization (HPH) technology was used to disaggregate and enhance the dispersion of acid-leached whitened MDPal (WMDPal) for the reinforcement of chitosan films. The results indicated that HPH successfully realized the disaggregation of one-dimensional palygorskite crystal bundles and the synchronous exfoliation of two-dimensional layered clay minerals, accompanied with the exposure of oxalate by-product particles, thereby significantly enhancing the dispersion of WMDPal. The degree of dispersion was positively correlated with the increase in the homogenization pressure and cycles. The introduction of the well-dispersed WMDPal obviously improved the mechanical properties and surface hydrophobicity of chitosan composite films due to strong interfacial interaction and the synergistic effect of mixed-dimensional nanoscale heterostructure composed one-dimensional nanorods and two-dimensional nanosheets. The optimal WMDPal/CS composite films presented remarkable mechanical improvements with an increase in the tensile strength of 63.49 % to 20.42 MPa, while the elongation at break increased by 67.35 % to 79.16 %, which was superior to that of composite films reinforced with individual high-purity palygorskite or illite, highlighting the promising application potential of natural clays with the multi-mineral compositions and mixed-dimensional nanostructural features. Based on the exploration of intrinsic structural heterogeneity to unique functional advantage, this study paves the way for the development of high-performance composites based on natural mixed-dimensional heterostructure of MDPal.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"278 ","pages":"Article 108000"},"PeriodicalIF":5.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Functionalized clay nanocomposites for enhanced proton conductivity in polyether-based fuel cell membranes 增强聚醚基燃料电池膜中质子导电性的功能化粘土纳米复合材料
IF 5.8 2区 地球科学
Applied Clay Science Pub Date : 2025-09-24 DOI: 10.1016/j.clay.2025.107999
Youssef O. Al-Ghamdi , Sherif M.A.S. Keshk
{"title":"Functionalized clay nanocomposites for enhanced proton conductivity in polyether-based fuel cell membranes","authors":"Youssef O. Al-Ghamdi ,&nbsp;Sherif M.A.S. Keshk","doi":"10.1016/j.clay.2025.107999","DOIUrl":"10.1016/j.clay.2025.107999","url":null,"abstract":"<div><div>This review critically examines the recent progress in the development of sulfonated polyether sulfone (SPES) and its derivatives (including sulfonated polyether sulfone with open sulfonic acid groups (SPESOS)) as functional matrices for next-generation proton exchange membrane (PEM) fuel cells. SPES-based membranes offer a tunable backbone, excellent thermal and mechanical stability, and chemical resistance, yet they often suffer from reduced proton conductivity and hydration stability under low-humidity or high-temperature conditions. To overcome these limitations, the integration of functionalized clay nanomaterials such as montmorillonite (Mt), layered double hydroxides (LDHs), and sepiolite (Sep) has emerged as a promising strategy. We discuss how these clays improve ionic domain morphology, water uptake, and mechanical reinforcement through molecular-level interactions with sulfonic acid sites. The review highlights scalable fabrication routes (e.g., solution casting, electrospinning, additive manufacturing), performance under realistic operating conditions, and comparisons with commercial Nafion membranes. Particular attention is given to structure property relationships, transport mechanisms, and interfacial engineering strategies that enable defect-free, high-conductivity membranes. Finally, challenges and future perspectives are addressed to guide sustainable, cost-effective membrane design for advanced electrochemical energy systems.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"278 ","pages":"Article 107999"},"PeriodicalIF":5.8,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Clostridium pasteurianum in kaolin bioleaching: Iron reduction and whitening mechanisms 高岭土生物浸出中的巴氏梭菌:铁还原和增白机制
IF 5.8 2区 地球科学
Applied Clay Science Pub Date : 2025-09-22 DOI: 10.1016/j.clay.2025.107998
Kaiqiang Li , Jiajiang Lin , Gary Owens , Zuliang Chen
{"title":"Clostridium pasteurianum in kaolin bioleaching: Iron reduction and whitening mechanisms","authors":"Kaiqiang Li ,&nbsp;Jiajiang Lin ,&nbsp;Gary Owens ,&nbsp;Zuliang Chen","doi":"10.1016/j.clay.2025.107998","DOIUrl":"10.1016/j.clay.2025.107998","url":null,"abstract":"<div><div>Previous studies have shown that microbial consortia outperform single strains in bioleaching processes. However, gaps remain in understanding the microbial community structure and functional interactions between key species and critical metabolic genes. This study addressed these questions through iron-reducing microbe-mediated bioleaching experiments combined with multi-omic approaches. The study found four major findings: (1) Bioleaching significantly enhanced the whiteness of kaolin from 60.8 to 90.4 % by selectively removing Fe (III), reducing the Fe (III) content from 1.5 % to 1.2 % without altering the kaolin structure. This process was accompanied by the solubilization of Fe (II). (2) Community succession identified <em>Clostridium</em> (87.7 %), <em>Lysinibacillus</em> (5.9 %), and <em>Bacillus</em> (0.7 %) as the dominant populations. Spearman analysis confirmed strong positive correlations between <em>Clostridium</em> abundance, Fe<sup>2+</sup> concentration, and whiteness (<em>p</em> &lt; 0.05), suggesting that together with Fe (III) content in kaolin <em>Clostridium</em> plays a key role in whitening. (3) Metagenomic reconstruction revealed <em>Clostridium pasteurianum</em> (50.8 %) was the core functional species. Its complete glycolysis/pyruvate metabolism pathways and acidogenesis gene clusters (lactic/formic/butyric acids) synergistically facilitated Fe (III) dissolution. Notably, this strain exhibited enriched ferredoxin-coding genes and membrane-bound electron transport chain components, suggesting it had a pivotal role in dissimilatory iron reduction. This work provides the first elucidation of structure-function relationships and metabolic networks within iron-reducing consortia, offering both theoretical foundations and practical strategies for sustainable mineral bio-processing.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"278 ","pages":"Article 107998"},"PeriodicalIF":5.8,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hydrothermal nanoarchitectonics of NiFe layered double hydroxides/FeOOH/graphene oxide composite electrode for enhancement of electrochemical performance NiFe层状双氢氧化物/FeOOH/氧化石墨烯复合电极的水热纳米结构研究
IF 5.8 2区 地球科学
Applied Clay Science Pub Date : 2025-09-20 DOI: 10.1016/j.clay.2025.107997
Jun Chen , Yuan-yuan Zhang , Ji-chao Wang , Wan-qing Zhang , Yong Zhang
{"title":"Hydrothermal nanoarchitectonics of NiFe layered double hydroxides/FeOOH/graphene oxide composite electrode for enhancement of electrochemical performance","authors":"Jun Chen ,&nbsp;Yuan-yuan Zhang ,&nbsp;Ji-chao Wang ,&nbsp;Wan-qing Zhang ,&nbsp;Yong Zhang","doi":"10.1016/j.clay.2025.107997","DOIUrl":"10.1016/j.clay.2025.107997","url":null,"abstract":"<div><div>In response to the key issues such as poor conductivity, insufficient active sites, and complex preparation processes associated with nickel‑iron layered double hydroxide (NiFe-LDH) and iron oxyhydroxide (FeOOH) electrode materials, this study proposed an innovative solution. A one-step hydrothermal method was employed to directly synthesize the NiFe-LDH/FeOOH composite on a 3D nickel foam substrate, and further prepared the NiFe-LDH/FeOOH/graphene oxide (GO) composite. Through a series of physicochemical characterization techniques, the positive effects of GO doping on the microstructure and electrochemical performance of the composites were systematically investigated. The experimental results showed that under the optimized condition with a GO concentration of 0.208 mg mL<sup>−1</sup>, the NiFe-LDH/FeOOH/GO composite electrode exhibited excellent electrochemical performance. At current densities of 1, 3, 5, 7, and 10 A g<sup>−1</sup>, its specific capacitances reached 1813.3, 1580.7, 1416.7, 1288.3, and 1133.8 F g<sup>−1</sup> respectively, which were significantly superior to those of the NiFe-LDH/FeOOH composite under the same conditions (1726.7, 1495.3, 1341.1, 1218.8, and 1054.4 F g<sup>−1</sup> respectively). In terms of high-current-density performance, at a current density of 10 A g<sup>−1</sup>, the capacitance retention rate of the NiFe-LDH/FeOOH/GO composite electrode was as high as 62.5 %, significantly better than the 60.1 % of the NiFe-LDH/FeOOH composite. In the cycle stability test, at a current density of 3 A g<sup>−1</sup>, after 1000 charge-discharge cycles, the capacity retention rate of the NiFe-LDH/FeOOH/GO composite was 69.0 %, far higher than the 22.3 % of the NiFe-LDH/FeOOH material. Even after 5000 cycles, although its capacity retention rate dropped to 25.4 %, it was still higher than the 14.4 % of the NiFe-LDH/FeOOH material. The results of this study provided new ideas for the design of supercapacitor electrode materials with high capacity and high-rate performance and made an important contribution to the development of nanoscale energy materials.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"278 ","pages":"Article 107997"},"PeriodicalIF":5.8,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of thermal aging at 165 °C–200 °C on bentonite performance 165℃- 200℃热老化对膨润土性能的影响
IF 5.8 2区 地球科学
Applied Clay Science Pub Date : 2025-09-17 DOI: 10.1016/j.clay.2025.107994
Sirpa Kumpulainen , Jari Martikainen , Teemu Laurila , Florian Kober , Olivier Leupin
{"title":"Effect of thermal aging at 165 °C–200 °C on bentonite performance","authors":"Sirpa Kumpulainen ,&nbsp;Jari Martikainen ,&nbsp;Teemu Laurila ,&nbsp;Florian Kober ,&nbsp;Olivier Leupin","doi":"10.1016/j.clay.2025.107994","DOIUrl":"10.1016/j.clay.2025.107994","url":null,"abstract":"<div><div>The engineered barrier system in the deep geological repository will encounter varying design loads (hydraulic, mechanical, thermal and chemical) over time. The bentonite buffer may remain dry for long periods of time locally, where access to water from the host rock is low, and consequently, heat may build up increasing the buffer temperature leading to dehydration of smectite. The temperature for complete removal of interlayer water on the smectite is within &gt;150 °C and depends on among others exchangeable cation, smectite type and confining pressure. Although dehydration reactions can be considered reversible, complete dehydration may lead to irreversible alterations. The objective of this work was to determine the effect of thermal aging on bentonite buffer performance.</div><div>Bentonite from Wyoming was thermally aged at 165 °C, 180 °C or 200 °C for 4 weeks, 8 weeks or 20 weeks in a dry, unsaturated state. Thereafter, bentonite was cooled down to room temperature and its properties and performance were evaluated determining the mineralogy by X-ray diffraction (XRD), cation exchange capacity (CEC), swelling index, and performing swelling pressure and hydraulic conductivity tests. Swiss repository conditions were applied for this work using granular bentonite mixture (GBM) and a target dry density of 1450 kg/m<sup>3</sup> and Opalinus Clay synthetic porewater (TDS of 16.92 g/l) in swelling pressure and hydraulic conductivity experiments.</div><div>Mineralogical changes observed include dehydration of gypsum and change in clay suspension color indicating small changes in iron oxide mineral phases or contents. No impact on the swelling pressure was noted due to thermal aging, but thermally aged samples had a factor of 1.8 higher hydraulic conductivity compared to references. In addition, up to 4 % decrease in apparent CEC, and up to 25 % decrease in swelling index and faster settling of clay suspensions were observed to occur with thermal aging time and temperature. One potential explanation for observed changes is partial fixation of exchangeable cations and consequent changes in particle size due to heat exposure.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"278 ","pages":"Article 107994"},"PeriodicalIF":5.8,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Carvacrol-loaded montmorillonite–caseinate hybrids as active additives for the development of antimicrobial alginate-chitosan microcapsules carvacrol负载蒙脱石-酪蛋白酸盐杂交体作为活性添加剂开发海藻酸盐-壳聚糖抗菌微胶囊
IF 5.8 2区 地球科学
Applied Clay Science Pub Date : 2025-09-17 DOI: 10.1016/j.clay.2025.107996
Mohamed Brahmi , Sara Moumnassi , Kamal Essifi , Emilie Dumas , Abdeslam Asehraou , Abdesselam Tahani , Adem Gharsallaoui
{"title":"Carvacrol-loaded montmorillonite–caseinate hybrids as active additives for the development of antimicrobial alginate-chitosan microcapsules","authors":"Mohamed Brahmi ,&nbsp;Sara Moumnassi ,&nbsp;Kamal Essifi ,&nbsp;Emilie Dumas ,&nbsp;Abdeslam Asehraou ,&nbsp;Abdesselam Tahani ,&nbsp;Adem Gharsallaoui","doi":"10.1016/j.clay.2025.107996","DOIUrl":"10.1016/j.clay.2025.107996","url":null,"abstract":"<div><div>This study presented a novel approach for encapsulating carvacrol, a volatile compound with antimicrobial properties, using montmorillonite-based hybrid materials prepared via an evaporation–adsorption process under vacuum at room temperature. These hybrids were incorporated as active additives into alginate-chitosan microcapsules. The effect of montmorillonite surface functionalization was examined by preparing two types of carvacrol-loaded composites: one with sodium caseinate intercalated within the clay layers, and another with caseinate adsorbed onto the external surface. Among these, the intercalated composite (Cas0.5@Mt-3) showed the highest carvacrol adsorption capacity, reaching 176.87 mg/g compared to 155.83 mg/g for the unmodified clay. This enhancement was attributed to the diffusion of carvacrol into the interlayer space, as supported by XRD analysis showing increased interlayer spacing.</div><div>The carvacrol-loaded hybrids were incorporated into alginate matrices at three concentrations (1 %, 2 %, and 3 % <em>w</em>/w) using ionotropic gelation to form stable microcapsules. Higher encapsulation efficiency and loading capacity were achieved with the hybrid composites, likely due to the amphiphilic nature of caseinate, which improved compatibility between the additive and the polymeric matrix, as confirmed by FT-IR and TGA analysis.</div><div>In vitro release studies in food-simulating media revealed more controlled carvacrol release in aqueous medium, while acidic and oily conditions led to faster diffusion. Antimicrobial tests against selected strains demonstrated enhanced inhibition, attributed to the synergistic effect of carvacrol and the polymeric components, particularly chitosan used for crosslinking. These results supported the effectiveness of this approach and its potential for developing active polymer-based systems to improve carvacrol bioavailability in food-related applications.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"278 ","pages":"Article 107996"},"PeriodicalIF":5.8,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Clay mineral formation via interstratified phases in Luvisols formed from amphibolite, northeastern Brazil 巴西东北部角闪岩形成的luvisol的层间相粘土矿物形成
IF 5.8 2区 地球科学
Applied Clay Science Pub Date : 2025-09-17 DOI: 10.1016/j.clay.2025.107995
Artur Henrique Nascimento da Silva , Gabriel Ramatis Pugliese Andrade , Sheila Aparecida Correia Furquim , Fábio Soares de Oliveira , Marilya Gabryella de Sousa , Marcelo Metri Correa , Ygor Jacques Agra Bezerra da Silva , Juliet Emília Santos de Sousa , Tiago Osório Ferreira , Xose Lois Otero , Valdomiro Souza Junior
{"title":"Clay mineral formation via interstratified phases in Luvisols formed from amphibolite, northeastern Brazil","authors":"Artur Henrique Nascimento da Silva ,&nbsp;Gabriel Ramatis Pugliese Andrade ,&nbsp;Sheila Aparecida Correia Furquim ,&nbsp;Fábio Soares de Oliveira ,&nbsp;Marilya Gabryella de Sousa ,&nbsp;Marcelo Metri Correa ,&nbsp;Ygor Jacques Agra Bezerra da Silva ,&nbsp;Juliet Emília Santos de Sousa ,&nbsp;Tiago Osório Ferreira ,&nbsp;Xose Lois Otero ,&nbsp;Valdomiro Souza Junior","doi":"10.1016/j.clay.2025.107995","DOIUrl":"10.1016/j.clay.2025.107995","url":null,"abstract":"<div><div>The transformations of clay minerals in Luvisols formed on amphibolite under contrasting semi-arid climates in northeastern Brazil were examined to understand how weathering intensity drives the development of mixed-layer minerals (MLMs) and affects key soil properties. Two Chromic Luvisols, developed from similar amphibolite parent material, each representing distinct climatic conditions (Profile 1: annual precipitation = 415 mm yr<sup>−1</sup>; Profile 2: = 777 mm yr<sup>−1</sup>) were sampled across their A, B, and Cr horizons. X-ray diffraction, Fourier-transform infrared spectroscopy, thermogravimetry and Mössbauer spectroscopy were used to characterize the clay fractions and their interstratified minerals. The results revealed that both soils predominantly feature interstratified kaolinite–smectite (K<img>S) phases, with Profile 1 showing higher proportions of expandable smectite layers. In contrast, Profile 2 exhibited a greater enrichment in kaolinitic layers at all depths. Notably, this study demonstrates that the pedogenetic clay minerals in natural Luvisols from the Brazilian semiarid region consist of transitional MLMs rather than discrete endmembers. It also shows that climatic variation influenced the soil mineralogical composition, primarily through changes in the mixed-layer phases.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"278 ","pages":"Article 107995"},"PeriodicalIF":5.8,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Large-area hybrid silver/nickel-iron layer double hydroxide on metallic tube array for highly sensitive surface-enhanced Raman scattering (SERS) application 金属管阵列上大面积混合银/镍铁层双氢氧化物用于高灵敏度表面增强拉曼散射(SERS)
IF 5.8 2区 地球科学
Applied Clay Science Pub Date : 2025-09-13 DOI: 10.1016/j.clay.2025.107986
Balasubramanian Sriram , Alfreda Krisna Altama , Elaiyappillai Elanthamilan , Yi-Le Liao , Sea-Fue Wang , Jinn P. Chu
{"title":"Large-area hybrid silver/nickel-iron layer double hydroxide on metallic tube array for highly sensitive surface-enhanced Raman scattering (SERS) application","authors":"Balasubramanian Sriram ,&nbsp;Alfreda Krisna Altama ,&nbsp;Elaiyappillai Elanthamilan ,&nbsp;Yi-Le Liao ,&nbsp;Sea-Fue Wang ,&nbsp;Jinn P. Chu","doi":"10.1016/j.clay.2025.107986","DOIUrl":"10.1016/j.clay.2025.107986","url":null,"abstract":"<div><div>This paper presented a novel method for the preparation of hybrid metallic tube arrays (MeTA) with Ag coated nickel‑iron layered double hydroxide (LDH) as highly sensitive surface-enhanced Raman scattering (SERS) substrates for the detection of toxic dyes. Nickel‑iron LDH was used as a two-dimensional material with a brucite-like structure featured a large surface area and excellent adsorption capacity. This study leveraged the sharp edges of the array structures in conjunction with the plasmonic properties of silver (a noble metal) to amplify local electromagnetic fields to create plasmonic hot spots. A hybrid heterojunction composed of Ag and LDH on MeTA enhanced the capacity of the substrate to absorb target analytes such as rhodamine 6G (R6G) and malachite green (MG). The substrate demonstrated enhanced SERS performance, as indicated by high enhancement factors in the detection of R6G (2.6 × 10<sup>8</sup>) and MG (1.8 × 10<sup>6</sup>). The arrays exhibited a broad linear dynamic range (R6G: 10<sup>−4</sup> to 10<sup>−14</sup> mol L<sup>−1</sup>; MG: 10<sup>−4</sup> to 10<sup>−10</sup> mol L<sup>−1</sup>), exceeded the ranges reported in previous studies. The structure of the array also revealed good reproducibility and variability. In addition, the limit of detection for R6G was determined to be 6.0 × 10<sup>−9</sup> mol L<sup>−1</sup> based on band height calibration and 2.57 × 10<sup>−9</sup> mol L<sup>−1</sup> based on band height ratio calibration, respectively. These results underscored the importance of adsorption capacity in developing advanced SERS substrates.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"278 ","pages":"Article 107986"},"PeriodicalIF":5.8,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Author's response to “Discussion on ‘Design of acid-geopolymers based on clays by-products for methylene blue removal from wastewater’ [Applied Clay Science 245 (2023) 107126]” and corrigendum to our recent paper [https://doi.org/10.1016/j.clay.2023.107126] 作者对“基于粘土副产物的酸性地聚合物设计用于去除废水中亚甲基蓝的讨论”的回应[应用粘土科学245(2023)107126]和我们最近论文的更正[https://doi.org/10.1016/j.clay.2023.107126]]
IF 5.8 2区 地球科学
Applied Clay Science Pub Date : 2025-09-11 DOI: 10.1016/j.clay.2025.107984
Salma En-naji , Sara Ghazi , Hanaa Mabroum , Safaa Mabroum , Khalid Khatib , Yassine Taha , Inés García Lodeiro , Rachid Hakkou
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