Applied Clay Science最新文献

英文中文

Preface to Clays for Earth, Health and Environment: A contribution from EuroClay 2023

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science

Pub Date : 2025-02-01 DOI: 10.1016/j.clay.2024.107645

引用次数: 0

Multiscale and quantitative study of thermal conductivity in shale using TDTR measurements and homogenization techniques

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science

Pub Date : 2025-02-01 DOI: 10.1016/j.clay.2025.107719

Lingzhi Xie , Chuanqing Yu , Yao Zhang , Bo He , Runxi Wang , Jun Liu

Elevated temperatures in shale reservoirs are unavoidable during deep shale gas extraction. Thermal conductivity is an essential determinant influencing numerous heat-related activities. Nonetheless, comprehending the thermal conductivity of shale is difficult due to its varied mineral compositions, intricate microstructural characteristics, and the absence of direct measurement techniques. This study addresses these problems by utilizing Time-Domain Thermoreflectance (TDTR) technology, which offers accurate measurements of the thermal properties of mineral phases (at micrometer scale) in shale, such as clay and quartz. The test findings indicate that the clay matrix demonstrates a thermal conductivity of 1.98 W/(m·K) parallel to the bedding and 1.65 W/(m·K) perpendicular to it, whereas quartz displays an isotropic value of 6.94 W/(m·K) in both directions. A two-step homogenization methodology has been developed that accurately represents the layering distribution of grains and accounts for the anisotropic behavior of the clay matrix, integrating the Mori-Tanaka method within lamina and series-parallel models within lamina. The precision of this homogenization process is confirmed by further macroscopic measurements utilizing the laser flash technique, exhibiting an error margin of 5 %. Additionally, quantitative study evaluates the influence of four variables on the anisotropy of thermal conductivity by ANOVA. The findings indicate that the anisotropy of thermal conductivity is predominantly influenced by the orientation of the clay matrix.

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引用次数: 0

Holographic characterization of typical silicate minerals by terahertz time-domain spectroscopy

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science

Pub Date : 2025-02-01 DOI: 10.1016/j.clay.2025.107720

Haochong Huang , Xinyu Li , Zhiyuan Zheng , Hanhan Fan , Caiqin Liu , Enhui Yuan , Jialu Gu , Yutong Ma , Qian Xu , Spozmai Panezai , Shanshan Li , Zhuo Zhang , Dexin Sun , Kunfeng Qiu

The Deep-Time Digital Earth Plan aims to develop a comprehensive digital representation of Earth's global systems, a goal that requires extensive mineralogical data and substantial scientific information. While traditional mineralogical characterization provides critical insights into the mantle's water cycle and geological evolution, existing geological methodologies face challenges due to electromagnetic band gaps and limitations in phase utilization. Leveraging the unique properties of water-sensitive, coherent, and fingerprint spectra, this study introduced Terahertz (THz) spectroscopy as a new method for validating holographic “THz colors” under pyrolytic and optical conditions. This approach enabled the simultaneous analysis of amplitude, phase, and spectral distribution for typical silicate minerals, facilitating the development of a comprehensive library of THz spectra for mineral materials. This library was constructed with support from conventional X-ray and infrared tools. Our research identified several minerals with THz characteristic absorption peaks, including pyrophyllite at 1.10 THz and chamosite at 1.15 THz. These findings challenged existing perceptions in the THz community regarding raw mineral. The experimental results demonstrated the potential of THz technology as a transformative tool for mineral detection and geological analysis, integrating optics and geophysics. Moreover, this advancement provides significant insights and enhances the development of digital Earth models and study of mineral morphology on Earth's surface.

{"title":"Holographic characterization of typical silicate minerals by terahertz time-domain spectroscopy","authors":"Haochong Huang , Xinyu Li , Zhiyuan Zheng , Hanhan Fan , Caiqin Liu , Enhui Yuan , Jialu Gu , Yutong Ma , Qian Xu , Spozmai Panezai , Shanshan Li , Zhuo Zhang , Dexin Sun , Kunfeng Qiu","doi":"10.1016/j.clay.2025.107720","DOIUrl":"10.1016/j.clay.2025.107720","url":null,"abstract":"<div><div>The Deep-Time Digital Earth Plan aims to develop a comprehensive digital representation of Earth's global systems, a goal that requires extensive mineralogical data and substantial scientific information. While traditional mineralogical characterization provides critical insights into the mantle's water cycle and geological evolution, existing geological methodologies face challenges due to electromagnetic band gaps and limitations in phase utilization. Leveraging the unique properties of water-sensitive, coherent, and fingerprint spectra, this study introduced Terahertz (THz) spectroscopy as a new method for validating holographic “THz colors” under pyrolytic and optical conditions. This approach enabled the simultaneous analysis of amplitude, phase, and spectral distribution for typical silicate minerals, facilitating the development of a comprehensive library of THz spectra for mineral materials. This library was constructed with support from conventional X-ray and infrared tools. Our research identified several minerals with THz characteristic absorption peaks, including pyrophyllite at 1.10 THz and chamosite at 1.15 THz. These findings challenged existing perceptions in the THz community regarding raw mineral. The experimental results demonstrated the potential of THz technology as a transformative tool for mineral detection and geological analysis, integrating optics and geophysics. Moreover, this advancement provides significant insights and enhances the development of digital Earth models and study of mineral morphology on Earth's surface.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"267 ","pages":"Article 107720"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101113","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

Developing halloysite-based X-ray scintillating nanocomposite enables red to green tunable emission behavior in epoxy resin

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science

Pub Date : 2025-01-31 DOI: 10.1016/j.clay.2025.107726

Jiaying Zhong , Weihua Song , Yu Wang , Jing Zhang , Yan Gao , Yanmin Yang , Hailei Zhang

With the advancement of rare-earth luminescent materials, developing composites with tunable luminescent properties poses a significant challenge. In this study, we synthesized HALs@YF₃:Eu³⁺ scintillator material that emits red light by utilizing halloysites (HALs) as base materials and then surface modified with europium-doped YF₃ via hydrothermal synthesis. The yielded product HALs@YF₃:Eu³⁺ was characterized by TEM, SEM, XRD, and XPS, and then incorporated into the epoxy resin to endow X-ray scintillating abilities in the obtained composite with enhanced mechanical properties. Moreover, the green-emitting scintillator was also incorporated into the epoxy resin along with HALs@YF₃:Eu³⁺ with varying feed ratios to afford the epoxy resin composites with tunable emission behaviors from red to green. This study demonstrates a valuable approach for applying epoxy resin composite materials in the field of radioluminescence.

引用次数: 0

Quantitative analogism on montmorillonite mineral layer filtration ability against micro-materials

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science

Pub Date : 2025-01-29 DOI: 10.1016/j.clay.2025.107718

Hideo Komine

Based on experimental and theoretical studies of bentonite hydraulic conductivity and swelling behavior, the author proposes a method for theoretical calculation of the interlayer distance of montmorillonite, a main clay mineral. Comparison of the interlayer distance of montmorillonite calculated using this method with the sizes of micromaterials blocked by the interlayer can support quantitative evaluation of the ability of montmorillonite to block the passage of micromaterials. The validity of this method was demonstrated by quantitative evaluation of filtration of seawater components by montmorillonite with permeable bentonite materials in some artificial seawater environments in the author's previous studies. This study has proposed the calculating flow of the filtration ability of montmorillonite interlayers. Furthermore, the method is applied to clay liners at industrial final waste disposal sites to develop necessary specifications for urgently needed clay-liner materials able to block the passage of micro-substances from biological waste into the environment. In addition, several case calculations were performed and depicts specifications of clay-liners which can block permeation of prion diseased brain matter (4 nm micromaterials) and/or can block permeation of Noroviruses (average diameter, 25–30 nm).

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引用次数: 0

Utilization of encapsulating, anti-oxidizing, and green capping features of metakaolin based geopolymers for Mn, Cr and Co salts in catalytic degradation of dyes

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science

Pub Date : 2025-01-29 DOI: 10.1016/j.clay.2025.107721

Bassam El-Eswed , Yanal Albawarshi

Green and sustainable alkali-activated aluminosilicates (geopolymers, GPs), with zeolite-like structure were used previously to prepare metal oxides/GP composites by ion-exchange of metal ions with Na⁺ balancing [AlO₄]⁻ in GP. The present work attempts preparing metal oxides embedded in GP, for the first time, by direct mixing of 30 wt% KMnO₄, K₂CrO₄ or CoCl₂ with alkali activated Aldrich metakaolin (MK) and local Jordanian metakaolin (JMK) followed by calcination at 650 °C. FTIR, XRD, SEM and TEM of the products showed dispersion of nanostructures of metal oxides (Mn₃O₄ (II, III), Cr₂O₃ (III) and Co₃O₄ (II, III)) suggesting reducing/anti-oxidizing and capping power of aluminosilicate medium. The degradation behavior of acid blue (AB) and Congo red (CR) was studied in the presence of GP samples, H₂O₂ and absence of illumination. Using 5.0 g/L catalyst dose, 50 mg/L dye concentration, 88 mM H₂O₂, 30 °C and pH 10; MK-Mn and JMK-Mn catalysts induced degradation of 90 % AB within 65 min. MK-Co and JMK-Co resulted in degradation of 50–74 % of CR within 210 min at 50 °C. Although CR (26.9, 11.0 and 53.3 %) was found to have higher affinity than AB (1.2, 7.7 and 26.4 %) for adsorption onto JMK-Cr, JMK-Mn and JMK-Co, the second order rate constants (k₂) of CR (8.14 × 10², 0.0 and 67.93 min⁻¹ M⁻¹) were lower than those of AB (7.29 × 10³, 1.81 × 10³ and 5.23 × 10² min⁻¹ M⁻¹). In comparison with photocatalytic degradation, the present work exclude electricity and UV lamps cost with relatively lower k₂ and longer treatment.

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引用次数: 0

Correlation of acid sites with morphology of layered silicates

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science

Pub Date : 2025-01-28 DOI: 10.1016/j.clay.2025.107714

Liva Dzene , Martine Lanson , Bruno Lanson , Sebastian Meyer , Angelina Razafitianamaharavo , Frédéric Villiéras , Severinne Rigolet , Cyril Vaulot , Simona Bennici

Acid sites of clay minerals are active to catalyze numerous organic reactions. Previous studies had focused on the types and strength of these sites by correlating them with acid, pillaring or heat treatments, but the relation of acid sites with clay mineral morphology is not well understood. In this study, the synthesis of samples having similar chemical composition and structure, but different morphology characteristics was realized. The surface of samples was characterized by low-pressure argon adsorption at 77 K. The acid sites were probed by thermal desorption of 2-phenylethylamine. Three sites of different acid strength were identified. Whereas the assignment of these sites to basal and edge surfaces remains debatable, the method of thermal desorption of 2-phenylethylamine could clearly distinguish different sites related to homogenous and heterogeneous surfaces.

引用次数: 0

Oxalate-derived NiO@NiAl-layered double hydroxide core-shell material for supercapacitors

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science

Pub Date : 2025-01-28 DOI: 10.1016/j.clay.2025.107715

Hong-Li Yue, Hong-Yan Zeng, Wei Yan, Chao-Wei Luo, Zi-Feng Tian, Kai-Wen Xu

NiO as an appealing electrode material has been used for supercapacitors due to its high theoretical capacity and easy availability, but intrinsically low electrical conductivity and insufficient redox active sites restrict its further applications. In this work, a novel oxalate-derived NiO@NiAl-layered double hydroxide (LDH) with 3D core-shell structure (denoted as NiO_OA@LDH) was prepared via hydrothermal calcination method, where the oxalate-derived porous C-doping NiO (NiO_OA) grown on nickel foam (NF) was constructed using NiC₂O₄ as a sacrificial template and carbon source. The deposition of the ultrathin NiAl-LDH nanosheets on the NiO_OA was conducive to forming robust adhesion between the core and the shell, which promoted effective electron/ion transfer and structure stability. Benefiting from the unique 3D core-shell structure and complementary compositional features, the NiO_OA@LDH gave a high specific charge of 1347.0C g⁻¹ at 1 A g⁻¹, prominent rate performance (68.5 % retention at 15 A g⁻¹) and cycle stability (91.1 % retention at 5 A g⁻¹ after 5000 cycles). Furthermore, the as-assembled NiO_OA@LDH//activated carbon (AC) device achieved a high energy density of 45.6 Wh kg⁻¹ at a power density of 557.8 W kg⁻¹ and an outstanding cycle stability (93.1 % retention at 5 A g⁻¹ after 10,000 cycles).

{"title":"Oxalate-derived NiO@NiAl-layered double hydroxide core-shell material for supercapacitors","authors":"Hong-Li Yue, Hong-Yan Zeng, Wei Yan, Chao-Wei Luo, Zi-Feng Tian, Kai-Wen Xu","doi":"10.1016/j.clay.2025.107715","DOIUrl":"10.1016/j.clay.2025.107715","url":null,"abstract":"<div><div>NiO as an appealing electrode material has been used for supercapacitors due to its high theoretical capacity and easy availability, but intrinsically low electrical conductivity and insufficient redox active sites restrict its further applications. In this work, a novel oxalate-derived NiO@NiAl-layered double hydroxide (LDH) with 3D core-shell structure (denoted as NiO<sub>OA</sub>@LDH) was prepared via hydrothermal calcination method, where the oxalate-derived porous C-doping NiO (NiO<sub>OA</sub>) grown on nickel foam (NF) was constructed using NiC<sub>2</sub>O<sub>4</sub> as a sacrificial template and carbon source. The deposition of the ultrathin NiAl-LDH nanosheets on the NiO<sub>OA</sub> was conducive to forming robust adhesion between the core and the shell, which promoted effective electron/ion transfer and structure stability. Benefiting from the unique 3D core-shell structure and complementary compositional features, the NiO<sub>OA</sub>@LDH gave a high specific charge of 1347.0C g<sup>−1</sup> at 1 A g<sup>−1</sup>, prominent rate performance (68.5 % retention at 15 A g<sup>−1</sup>) and cycle stability (91.1 % retention at 5 A g<sup>−1</sup> after 5000 cycles). Furthermore, the as-assembled NiO<sub>OA</sub>@LDH//activated carbon (AC) device achieved a high energy density of 45.6 Wh kg<sup>−1</sup> at a power density of 557.8 W kg<sup>−1</sup> and an outstanding cycle stability (93.1 % retention at 5 A g<sup>−1</sup> after 10,000 cycles).</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"267 ","pages":"Article 107715"},"PeriodicalIF":5.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101108","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

Instant formation of AlN whiskers and monocrystalline silicon with the separation of silicon and aluminum elements from 7 Å halloysite during thermite reduction

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science

Pub Date : 2025-01-27 DOI: 10.1016/j.clay.2025.107711

Jing Zhang , Hao Zhang , Leibo Ji , Mingyi Huang , Qinfu Liu , JiaXing Li , XiaoYu Ding , Xi Xu

Natural halloysite have attracted great attention owing to their unique hollow tube and strong adsorption capacity. Nevertheless, the straightforward utilization of halloysite without further processing cannot fully discover its potential will lead to the waste of resources. In this study, an environmentally friendly method for the simultaneous separation of silica and aluminum from natural 7 Å halloysite via the aluminum thermal reduction method upon 700 °C under the system of aluminum powder and NaCl in N₂ atmosphere was developed, concurrently occurs with the structural transformation from the raw hollow tubular halloysite to AIN whiskers and monocrystalline silicon droplet tips was observed. The formation of AlN whiskers can be concluded as three steps: (1) the reduction of Si⁴⁺ in SiO tetrahedron into Si⁰ atoms; (2) the separation of silicon and aluminum in the 1:1 meta-halloysite layer and the Si⁰ atoms transportation to the end of whisker rod to form the monocrystalline silicon microsphere; (3) the formation of AlN whiskers by the replacement of the remaining oxygen atoms in the aluminum‑oxygen octahedra. This in-situ replacement of oxygen atoms by nitrogen atoms in the AlO octahedron of tubular meta-halloysite plays a pivotal role in decreasing the reaction temperature. This work provides a novel idea and opens up a new technical route to prepare aluminum nitride and monocrystalline silicon with green efficiency and low cost.

{"title":"Instant formation of AlN whiskers and monocrystalline silicon with the separation of silicon and aluminum elements from 7 Å halloysite during thermite reduction","authors":"Jing Zhang , Hao Zhang , Leibo Ji , Mingyi Huang , Qinfu Liu , JiaXing Li , XiaoYu Ding , Xi Xu","doi":"10.1016/j.clay.2025.107711","DOIUrl":"10.1016/j.clay.2025.107711","url":null,"abstract":"<div><div>Natural halloysite have attracted great attention owing to their unique hollow tube and strong adsorption capacity. Nevertheless, the straightforward utilization of halloysite without further processing cannot fully discover its potential will lead to the waste of resources. In this study, an environmentally friendly method for the simultaneous separation of silica and aluminum from natural 7 Å halloysite via the aluminum thermal reduction method upon 700 °C under the system of aluminum powder and NaCl in N<sub>2</sub> atmosphere was developed, concurrently occurs with the structural transformation from the raw hollow tubular halloysite to AIN whiskers and monocrystalline silicon droplet tips was observed. The formation of AlN whiskers can be concluded as three steps: (1) the reduction of Si<sup>4+</sup> in Si<img>O tetrahedron into Si<sup>0</sup> atoms; (2) the separation of silicon and aluminum in the 1:1 meta-halloysite layer and the Si<sup>0</sup> atoms transportation to the end of whisker rod to form the monocrystalline silicon microsphere; (3) the formation of AlN whiskers by the replacement of the remaining oxygen atoms in the aluminum‑oxygen octahedra. This in-situ replacement of oxygen atoms by nitrogen atoms in the Al<img>O octahedron of tubular meta-halloysite plays a pivotal role in decreasing the reaction temperature. This work provides a novel idea and opens up a new technical route to prepare aluminum nitride and monocrystalline silicon with green efficiency and low cost.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"267 ","pages":"Article 107711"},"PeriodicalIF":5.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101104","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

Montmorillonite-enhanced micro- and nanocomposites for targeted and controlled oral drug delivery systems

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science

Pub Date : 2025-01-25 DOI: 10.1016/j.clay.2025.107713

Zhenping Xiao , Xuemin Gu , Ji Huang , Liangzhe Liu , Siying Yuan , Peng Jiang , Yangrong Zhang , Yingshan Zhao , Shijie Wei , Qi Tao , Dongzhi Hou

Oral drug delivery systems (ODDSs) offer numerous advantages, such as convenient administration, high patient adherence, and cost-effectiveness. However, challenges like enzyme barriers and first-pass metabolism limit their effectiveness, and traditional methods often lack features for controlled release and targeted delivery, tending to cause severe systemic toxic side effects. Recent advancements in drug delivery have introduced alternative delivery vehicles. Montmorillonite (Mt), an FDA-approved biocompatible nanomaterial, stands out due to its high specific surface area, ideal adsorption capacity and cation exchange properties. This review explores preparation, modification, and application of Mt-based micro- and nanocomposites (MNCs) for ODDSs. Drugs encapsulated in Mt-based MNCs are shielded from the gastrointestinal environment, facilitating delayed and targeted drug release and enhancing drug bioavailability. The paper provides insights into the rational selection of Mt-based MNCs for advanced ODDSs, highlighting their potential to overcome limitations of traditional drug delivery systems.

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