Applied Clay Science最新文献

{"title":"Redox behavior of ferrocene-methanol encapsulated in hydrophobic nanotubes","authors":"Fadwa AlFadel Raad ,&nbsp;Pierre Picot ,&nbsp;Elodie Barruet ,&nbsp;Sophie Le Caër ,&nbsp;Delphine Schaming ,&nbsp;Lorette Sicard ,&nbsp;Antoine Thill","doi":"10.1016/j.clay.2025.107909","DOIUrl":"10.1016/j.clay.2025.107909","url":null,"abstract":"<div><div>The remarkable ability of hybrid imogolite nanotubes (Imo-CH₃) to efficiently encapsulate various small molecules coupled with their wall polarization, could make them potentially attractive for energy applications (battery, supercapacitor, photocatalysis…). To explore these potentialities, a first step is to understand the behavior of electroactive confined molecules inside the nanotube. Here, ferrocene methanol (FcMeOH) was encapsulated inside Imo-CH₃ of two different average lengths. The goal of this work is to assess whether the wall polarization has an influence on the redox behavior of the confined molecules. The adsorption isotherms of FcMeOH in the two types of nanotubes were determined. They exhibit an unusual S-shape, which is explained by the co-adsorption of FcMeOH and water followed by a wetting transition. The nanotubes can be loaded with up to 0.8 mmol·g⁻¹ (21 mAh·g⁻¹) of FcMeOH. An oxidation current from the encapsulated FcMeOH was measured in the case of the shorter nanotubes. However, electron transfer mechanisms are not affected by the wall polarization of the hybrid imogolite, implying that the electron transfer to the electrode probably occurs along the nanotube axis rather than by intra-wall tunneling.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"276 ","pages":"Article 107909"},"PeriodicalIF":5.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313097","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}

{"title":"Self-sealing capacity of boom clay affected by an alkaline plume: Evidences from high resolution X-ray computed tomography and hydraulic conductivity measurements","authors":"Miroslav Honty ,&nbsp;Lander Frederickx ,&nbsp;Ivan Josipović ,&nbsp;Matthieu N. Boone ,&nbsp;Pascale Senechal ,&nbsp;Stéphane Faucher ,&nbsp;Séverine Levasseur ,&nbsp;Xavier Sillen","doi":"10.1016/j.clay.2025.107911","DOIUrl":"10.1016/j.clay.2025.107911","url":null,"abstract":"<div><div>This study aims to evaluate the self-sealing capacity of the Boom Clay when perturbed by an alkaline plume, by investigating the long-term evolution of hydraulic conductivity and mineralogical changes in fractured Boom Clay upon interaction with highly alkaline solutions. In a first step, percolation experiments were conducted on undisturbed clay samples using Young Cement Water (YCW, pH of 13.5) and Evolved Cement Water (ECW, pH of 12.6), both parallel and perpendicular to bedding planes. Hydraulic conductivity (K) in these alkaline environments were estimated, confirming the previous studies, with higher horizontal than vertical hydraulic conductivity as a result of the natural anisotropy of the Boom Clay. In a second step, clay samples were fractured. All samples experienced a significant increase in K, followed by a progressive decrease, indicative of an efficient self-sealing. This self-sealing process was visualized using X-ray micro computed tomography and spectral micro computed tomography analysis.</div><div>In addition, mineralogical analyses, including specific surface area and pore size distributions from N₂-physisorption, (Quantitative) X-ray diffraction and Fourier Transform Infrared spectroscopy analysis were conducted. They revealed partial dissolution of smectite in YCW environments but no significant mineral alteration in ECW-percolated samples. N₂-physisorption experiments of the post-mortem samples indicated decrease of the specific surface area and concomitant decrease in the microporosity in all studied cases. Though the decrease in the specific surface area and microporosity can be explained by partial dissolution of smectite in the YCW environment, the shift of the pore size distribution towards larger pores can be linked to relative density changes in the vicinity of the fractures and overall increase in hydraulic conductivity. The results confirmed that Boom Clay retains its self-sealing capacity, even after prolonged exposure to high-pH conditions. This study provides valuable insights into the hydro-mechanical and mineralogical response of Boom Clay, essential for assessing its long-term behaviour as a geological barrier.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"276 ","pages":"Article 107911"},"PeriodicalIF":5.3,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298434","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}

{"title":"Swelling pressure of clayey geomaterials: A comprehensive analysis of experimental methods, numerical estimates and molecular dynamics simulations","authors":"Hamza Mhamdi Alaoui ,&nbsp;Chaofa Zhao ,&nbsp;Wenbo Niu ,&nbsp;Daojia Wu ,&nbsp;Pierre-Yves Hicher","doi":"10.1016/j.clay.2025.107881","DOIUrl":"10.1016/j.clay.2025.107881","url":null,"abstract":"<div><div>Clay minerals are prevalent in clayey soils and rocks, where their swelling behavior upon chemo-thermo-hydro-mechanical forces is critical in geotechnical and geological engineering. Understanding swelling pressure is essential for accurately predicting swelling behavior. Numerous methods have been developed to estimate swelling pressure at different scales, though a comprehensive review comparing these methods is currently lacking. These methods generally fall into three categories: experimental techniques, numerical models, and molecular dynamics simulations. Experimental methods typically involve classical geotechnical tests, such as oedometer tests, conducted under varying loading conditions. Numerical models aim to simulate chemo-hydro-mechanical interactions, with particular emphasis on double-layer swelling. Recently, data-driven models have demonstrated high accuracy and good alignment with experimental findings. Molecular dynamics simulations provide insights into swelling behavior at the molecular scale, often correlating well with macroscale experimental results. This review summarizes these methods by detailing their key principles, recent advancements, challenges, and differences. It concludes with guidance on selecting the most suitable methodology for characterizing swelling pressure, tailored to the specific focus and requirements of each study.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"276 ","pages":"Article 107881"},"PeriodicalIF":5.3,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144290838","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}

{"title":"Hydrothermal smectite synthesis in presence of Glycine: Synergistic chemical evolution","authors":"Rihab Fkiri,&nbsp;Fabien Baron,&nbsp;Clément Comminges,&nbsp;Sabine Petit,&nbsp;Claude Geffroy,&nbsp;Brian Gregoire","doi":"10.1016/j.clay.2025.107902","DOIUrl":"10.1016/j.clay.2025.107902","url":null,"abstract":"<div><div>The role of smectite surfaces in organic matter dynamics is well documented, with clear evidence of their capacity to concentrate, preserve, and chemically modify organic compounds. However, the reciprocal influence—how organic molecules might guide clay mineral formation—remains a relatively unexplored scientific frontier. The present study investigates the dual role of glycine in Fe-smectite crystallization under hydrothermal conditions (150 °C for 5 days in an inert atmosphere), exploring how this ubiquitous amino acid influences mineral formation processes. X-ray diffraction confirmed the crystallization of Fe-smectite across glycine concentrations ranging from 0.08 to 0.6 M. The increase in glycine concentration induced a decrease in tetrahedral Fe(III) content and promoted the reduction of octahedral Fe(III) to Fe(II), as revealed by X-ray diffraction, Fourier transform infrared spectroscopy, and electrochemical analyses, consequently modifying the measured cation exchange capacity. Glycine polymerization was markedly enhanced in experiments with Fe-smectite crystallization compared to experiments without Fe-smectite. The presence of Fe-smectite favored linear peptides over cyclic one, thus facilitating the production of longer peptide chains. The results reveal a mutual interaction between glycine and minerals, resulting in minerals with distinct structural properties and reactivities that enhance organic matter transformation.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"276 ","pages":"Article 107902"},"PeriodicalIF":5.3,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279544","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}

{"title":"Water oxidation catalysts from electrochemical intercalating [PW12O40]3‐ and synthesizing layered double hydroxide on high conductivity rGO@Ni foam","authors":"Xiaoyan Zhu ,&nbsp;Zhipeng Sun ,&nbsp;Minghe Du ,&nbsp;Yi Liu ,&nbsp;Huixi Li ,&nbsp;Heng Deng ,&nbsp;Chunjie Yan ,&nbsp;Shengping Wang","doi":"10.1016/j.clay.2025.107887","DOIUrl":"10.1016/j.clay.2025.107887","url":null,"abstract":"<div><div>Developing an efficient and durable water oxidation catalyst is essential for the large-scale application of water electrolysis technologies. Novel catalysts, NF@rGO-LDH-PWs, were constructed through the electrochemical synthesis of Keggin-structure [PW₁₂O₄₀]³⁻ intercalated layered double hydroxide (LDH) arrays on porous nickel foams coated with reduced graphene oxide (rGO). The optimized intrinsic properties, such as enhanced conductivity, modulated electronic structure and constructed abundant diffusion paths, endow the hetero-structure catalyst with noteworthy oxygen evolution reaction (OER) performances in alkaline medium. Under optimal conditions, the catalyst exhibited an overpotential of 223 mV at 10 mA cm⁻², a Tafel slope of 33 mV dec⁻¹, an exchange current density of 8.3 × 10⁻² mA cm⁻², an activation energy of 14.60 kJ mol⁻¹ and a double-layer capacitance of 12.31 mF cm⁻², all of which are superior to those of its single-component counterparts. The turnover frequency (TOF) reached 0.38 s⁻¹, which is approximately 5 times higher than that of the substrate materials. Furthermore, the catalyst demonstrated excellent stability, with a relative standard deviation of only 0.09 % during 12 h of continuous operation.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"276 ","pages":"Article 107887"},"PeriodicalIF":5.3,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272454","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}

{"title":"Discussion on “Quantitative analogism on montmorillonite mineral layer filtration ability against micro-materials”","authors":"Himanshu Yadav ,&nbsp;Bharat Venkata Tadikonda","doi":"10.1016/j.clay.2025.107834","DOIUrl":"10.1016/j.clay.2025.107834","url":null,"abstract":"","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"275 ","pages":"Article 107834"},"PeriodicalIF":5.3,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253440","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}

{"title":"Kaolin clay-based diets for managing livestock's health and methane emission problem","authors":"Md. Rashidul Islam ,&nbsp;Ravi Naidu ,&nbsp;Bhabananda Biswas","doi":"10.1016/j.clay.2025.107891","DOIUrl":"10.1016/j.clay.2025.107891","url":null,"abstract":"<div><div>Increased livestock production is essential to meet the rising food and agri-services demand. However, livestock emit 70–95 % of agricultural methane (CH₄), a potent greenhouse gas, through their enteric fermentation. While various feed additives have been proposed to address CH₄ emissions and livestock production, this review highlights the potential of kaolin clays to serve these benefits by leveraging animals’ natural consumption habits. Over 136 non-human animal species are actively engaged in geophagy (earth-eating), and most of them prefer kaolin-rich soils. These animals routinely consume such soils as a source of essential minerals, and to manage gut parasites/pathogens, mycotoxins, gastrointestinal disorders, diarrhea, and acidosis. By learning from these feeding habits and their health benefits, raw and modified kaolin minerals can be used as feed ingredients in livestock’s regular diets. The unique morphology (<em>e.g.</em>, platy kaolinite and hollow tubular halloysite) and surface properties (<em>e.g.</em>, easy dispersion in solution to develop high Al³⁺ and polyhydroxy-Al ions) of kaolin can reduce enteric CH₄ emissions by intervening in its related biochemical reactions, while enhancing animal production. At the same time, these added clay particles are excreted through the feces. Unprocessed kaolin may often contain iron as an impurity, which is typically considered an economic burden due to additional processing requirements. However, this kaolin can be beneficial as a feed ingredient as it can enhance enteric CH₄ inhibition as well as alleviate iron deficiencies in livestock. This review will also discuss possible modifications of kaolin prior to adding it as a feed supplement for better and more sustainable outcomes in managing CH₄ emissions, and animal health problems.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"276 ","pages":"Article 107891"},"PeriodicalIF":5.3,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255210","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}

{"title":"Pore structure response of reconstituted kaolin and illite-smectite mixed-layer rich clay to 1D compression","authors":"Yanhao Zheng ,&nbsp;Béatrice A. Baudet","doi":"10.1016/j.clay.2025.107892","DOIUrl":"10.1016/j.clay.2025.107892","url":null,"abstract":"<div><div>This study systematically investigated the pore structure response of kaolin and illite/smectite mixed-layer rich clay in a reconstituted state to one-dimensional (1D) compression by first performing oedometer tests on saturated clay slurries, followed by characterising their pore structure using multi-scale characterisation techniques, with the primary objective of advancing the current understanding of the microstructural mechanisms underlying the macroscopic deformation of such clays. Under 1D loading, the volume reduction observed at the macro level essentially represented the macroscopic manifestation of changes in inter-aggregate porosity at the pore scale. It was the inter-particle pores that were compressed, despite the interlayer pores remaining stable. Two distinct pore collapse mechanisms were identified: kaolin exhibited a progressive collapse of particular larger pore population in an ordered manner, whereas illite/smectite mixed-layer rich clay demonstrated overall compression of inter-aggregate pores. Accordingly, mathematical relationships between the porosity and compressibility parameters for these two soils were proposed, with the two exhibiting opposite trends arising from their distinct microstructural features. Approaching from the unique perspective of pore structure, quantitative analysis of pore orientation and morphology on the vertical and horizontal planes demonstrated some progressively increasing anisotropy during compression. These findings provide important insights into pore-scale mechanisms governing clay compression behaviour and enrich the limited microporosity database in soil mechanics.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"276 ","pages":"Article 107892"},"PeriodicalIF":5.3,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240567","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}

{"title":"Reply to discussion on “Quantitative analogism on montmorillonite mineral layer filtration ability against micro-materials” by Hideo Komine","authors":"Hideo Komine","doi":"10.1016/j.clay.2025.107900","DOIUrl":"10.1016/j.clay.2025.107900","url":null,"abstract":"","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"275 ","pages":"Article 107900"},"PeriodicalIF":5.3,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144230633","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}

{"title":"Geopolymer membrane – photocatalyst coupling for textile wastewater treatment","authors":"Zeni Rahmawati ,&nbsp;Pedro Sánchez-Camacho ,&nbsp;Greg A. Mutch ,&nbsp;Alfa Akustia Widati ,&nbsp;Triyanda Gunawan ,&nbsp;Hamzah Fansuri","doi":"10.1016/j.clay.2025.107886","DOIUrl":"10.1016/j.clay.2025.107886","url":null,"abstract":"<div><div>This article presents the coupling of a geopolymer membrane (GM) with a photocatalyst (TiO₂), to combine filtration and photodegradation during wastewater treatment, using methylene blue as a model. The GM was prepared through the geopolymerization of metakaolin and alkali activator with pore modification through direct foaming. The photocatalyst TiO₂ was impregnated into the GMs, with loadings of 2.5, 5 and 10 wt%. The influence of TiO₂ addition on the characteristics of the membranes was investigated using several techniques (SEM, XRD, FTIR and open porosity determination techniques). The addition of TiO₂ influenced the porosity as well as the performance of GMs. In terms of methylene blue filtration-degradation, the TiO₂ loading exhibited its influence in a distinctive manner. The GM-TiO₂ 10 wt% exhibited complete rejection with very low hydraulic permeability, owing to the lowest open porosity. The GM-TiO₂ 5 wt% inferred the highest improvement on hydraulic permeability with a consistent rejection value.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"275 ","pages":"Article 107886"},"PeriodicalIF":5.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144204951","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}