Materials Chemistry and Physics最新文献_第3页

Tunable semiconducting organotin(IV) complexes as single-source precursors for controlled α-SnS nanostructure synthesis 可调半导体有机锡配合物作为单源前驱体用于可控α-SnS纳米结构的合成

IF 4.7 3区材料科学

Materials Chemistry and Physics Pub Date : 2026-04-15 Epub Date: 2026-01-29 DOI: 10.1016/j.matchemphys.2026.132154

Rajesh Pratap, Subrato Bhattacharya

{"title":"Tunable semiconducting organotin(IV) complexes as single-source precursors for controlled α-SnS nanostructure synthesis","authors":"Rajesh Pratap, Subrato Bhattacharya","doi":"10.1016/j.matchemphys.2026.132154","DOIUrl":"10.1016/j.matchemphys.2026.132154","url":null,"abstract":"<div><div>Four organotin(IV) complexes (<strong>1</strong>–<strong>4</strong>) were synthesized by reacting various organotin precursors with the sodium salt of S-thiobenzoylthioglycolate, allowing structural variation through different alkyl or aryl substituents and stoichiometric ratios. Single-crystal X-ray diffraction revealed distinct architectures: complex 1 formed a one-dimensional polymeric chain; complexes <strong>2</strong> and <strong>3</strong> adopted ladder-like structures; and complex <strong>4</strong> exhibited a skew-trapezoidal bipyramidal geometry. Spectroscopic analyses (<sup>1</sup>H, <sup>13</sup>C, <sup>119</sup>Sn NMR, and IR) corroborated the crystallographic findings. Impedance spectroscopy was used to investigate the electrical properties of complexes <strong>1</strong>–<strong>3.</strong> The undoped complexes displayed very low conductivity due to the lack of mobile charge carriers, with complex <strong>3</strong> showing the highest among them. Upon iodine doping, conductivity increased significantly through charge carrier generation by oxidation, with complex <strong>1</strong> exhibiting the highest conductivity in the doped state, likely owing to its retained planar structure. AC conductivity analysis indicated a correlated hopping conduction mechanism. Furthermore, pyrolysis of the complexes under controlled conditions yielded tin sulfide nanomaterials; complexes <strong>2</strong>–<strong>4</strong> produced phase-pure α-SnS, whereas complex <strong>1</strong> afforded mixed tin sulfides. The resulting materials were characterized by PXRD, SEM, HRTEM, and complementary techniques. These findings establish clear structure–property correlations and highlight the potential of organotin(IV) complexes as tunable precursors for semiconducting SnS nanomaterials.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132154"},"PeriodicalIF":4.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191536","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

Zn doped CsPb(Br/Cl)3 nonlinear optical limiting response BY FS laser Z-scanning 掺锌CsPb(Br/Cl)3非线性光学极限响应的FS激光z扫描研究

IF 4.7 3区材料科学

Materials Chemistry and Physics Pub Date : 2026-04-15 Epub Date: 2026-02-04 DOI: 10.1016/j.matchemphys.2026.132183

Musa Çadırcı , Yasemin Gündoğdu Kabakcı , Hamdi Şükür Kılıç

{"title":"Zn doped CsPb(Br/Cl)3 nonlinear optical limiting response BY FS laser Z-scanning","authors":"Musa Çadırcı , Yasemin Gündoğdu Kabakcı , Hamdi Şükür Kılıç","doi":"10.1016/j.matchemphys.2026.132183","DOIUrl":"10.1016/j.matchemphys.2026.132183","url":null,"abstract":"<div><div>In this study, nonlinear optical (NLO) properties of CsPb(Cl/Br)<sub>3</sub> perovskite quantum dots (PQDs) and Zn doped CsPb(Cl/Br)<sub>3</sub> PQDs was systematically investigated, discovering its potential for advanced NLO devices. Initially samples were synthesized and characterised using UV-Vis, photoluminescence (PL), and TEM method. Next, open and closed aperture Z-scan experiments and optical limiting evaluations were carried out under varying excitation conditions. We measured that nonlinear absorption (β), nonlinear refractive (n<sub>2</sub>) indices and third-order nonlinear susceptibility (χ<sup>3</sup>) for CsPb(Cl/Br)<sub>3</sub> PQDs to be on the orders of 10<sup>−11</sup> cm/W, 10<sup>−16</sup> cm<sup>2</sup>/W and 10<sup>−14</sup> esu, respectively. Interestingly, it has been observed that the NLO properties of Zn -doped samples beings prominent considerably compared to undoped samples, with the rate of increasing as the Zn content. The results show that CsPb(Cl/Br)<sub>3</sub> PQDs are remarkable material for applications on the next-generation NLO devices.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132183"},"PeriodicalIF":4.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191694","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

Structure–function analysis of an illite–montmorillonite organoclay blend for HPHT oil-based drilling fluids 高压高压油基钻井液用伊利石-蒙脱土有机粘土共混物的结构-功能分析

IF 4.7 3区材料科学

Materials Chemistry and Physics Pub Date : 2026-04-15 Epub Date: 2026-02-04 DOI: 10.1016/j.matchemphys.2026.132186

Ali Mahmoud, Rahul Gajbhiye, Salaheldin Elkatatny

{"title":"Structure–function analysis of an illite–montmorillonite organoclay blend for HPHT oil-based drilling fluids","authors":"Ali Mahmoud, Rahul Gajbhiye, Salaheldin Elkatatny","doi":"10.1016/j.matchemphys.2026.132186","DOIUrl":"10.1016/j.matchemphys.2026.132186","url":null,"abstract":"<div><div>The exploration of high-pressure and high-temperature (HPHT) hydrocarbon reservoirs requires drilling fluids with high thermal stability, controlled rheology, and effective fluid-loss mitigation. Oil-based drilling fluids (OBDFs) are commonly employed under such conditions; however, maintaining consistent performance at elevated temperature and pressure remains challenging. This study provides a structure–function interpretation of an OBDF system formulated using an equal-ratio blend of two commercially available organoclays (OCs), Claytone-3 (illite based) and Claytone-IMG 400 (montmorillonite based), selected for their contrasting mineralogical compositions and particle morphologies.</div><div>The OCs were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), and particle size distribution (PSD) analysis. The 1:1 OC blend was evaluated alongside the individual OCs and a commercial reference formulation (MC-TONE) through laboratory testing, including measurements of density, electrical stability, sag tendency, rheological and viscoelastic properties, and HPHT filtration behavior. The blended system consistently exhibited improved performance relative to the individual OCs, including a 19% increase in electrical stability, a 21% reduction in dynamic sag, a 13% increase in plastic viscosity, a 40% increase in yield point, and reductions in fluid loss (6.5%) and filter cake thickness (12%).</div><div>These performance trends are interpreted in terms of complementary structure–function contributions from the illite- and montmorillonite-rich components. The results suggest that mineralogical complementarity is an effective design variable for enhancing OBDF performance under HPHT conditions. This interpretation-driven approach provides practical insight for rational drilling fluid formulation aimed at improving wellbore stability in technically challenging environments.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132186"},"PeriodicalIF":4.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192214","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

Chemically modified bread-oven fly ash for amitriptyline adsorption under gastric and intestinal conditions 化学改性面包炉粉煤灰在胃肠道条件下对阿米替林的吸附

IF 4.7 3区材料科学

Materials Chemistry and Physics Pub Date : 2026-04-15 Epub Date: 2026-02-05 DOI: 10.1016/j.matchemphys.2026.132173

Luma Ahmed Mohammed Ali , Nurfaizah Abu Tahrim , Mohamad Azuwa Mohamed

{"title":"Chemically modified bread-oven fly ash for amitriptyline adsorption under gastric and intestinal conditions","authors":"Luma Ahmed Mohammed Ali , Nurfaizah Abu Tahrim , Mohamad Azuwa Mohamed","doi":"10.1016/j.matchemphys.2026.132173","DOIUrl":"10.1016/j.matchemphys.2026.132173","url":null,"abstract":"<div><div>Chemically modified adsorbents are widely used in the management of drug overdoses due to their ability to remove toxic compounds from the gastrointestinal tract. Although commercial pharmaceutical-grade activated carbon is effective, its production is often resource-intensive. This study presents a sustainable approach for upcycling bread-oven fly ash waste into chemically modified fly ash adsorbents for pharmaceutical applications. For the first time, the adsorption behavior of amitriptyline hydrochloride (AMI·HCl) onto acid- and alkali-modified fly ash was investigated under simulated gastric and intestinal conditions relevant to drug overdose treatment. Fly ash was chemically treated using KOH, HCl, and H<sub>2</sub>SO<sub>4</sub>, without any carbonization or thermal activation step, producing three modified adsorbents (FA-KOH, FA-HCl, and FA-H<sub>2</sub>SO<sub>4</sub>). The materials were characterized using BET surface area analysis, FESEM, FTIR, XRD, TGA, Raman spectroscopy, and elemental analysis. Among the modified samples, FA-KOH exhibited the most significant enhancement in surface properties, with surface area increasing from 6 to 88 m<sup>2</sup> g<sup>−1</sup>. FA-KOH demonstrated adsorption capacities of 66 mg g<sup>−1</sup> in simulated gastric fluid and 155 mg g<sup>−1</sup> in simulated intestinal fluid. The effects of adsorbent dose, contact time, pH, and initial AMI·HCl concentration were systematically evaluated, and adsorption performance was compared with commercial pharmaceutical activated carbon (Norit). Adsorption kinetics followed a pseudo-first-order model, while equilibrium data were best described by the Freundlich isotherm. Thermodynamic analysis confirmed that the adsorption process was spontaneous and exothermic. These results highlight the potential of chemically modified fly ash as a low-cost and sustainable alternative adsorbent for pharmaceutical applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132173"},"PeriodicalIF":4.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191625","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

Chemical etch resistance of sputter-deposited metal oxide thin film coatings in atomic hydrogen at 700 °C 700°C原子氢中溅射沉积金属氧化物薄膜涂层的耐化学腐蚀性能

IF 4.7 3区材料科学

Materials Chemistry and Physics Pub Date : 2026-04-15 Epub Date: 2026-01-31 DOI: 10.1016/j.matchemphys.2026.132143

Roman Pushkarev , Z. Silvester Houweling , Robbert W.E. van de Kruijs , Wesley T.E. Van den Beld , Jacobus M. Sturm , Marcelo D. Ackermann , Fred Bijkerk

{"title":"Chemical etch resistance of sputter-deposited metal oxide thin film coatings in atomic hydrogen at 700 °C","authors":"Roman Pushkarev , Z. Silvester Houweling , Robbert W.E. van de Kruijs , Wesley T.E. Van den Beld , Jacobus M. Sturm , Marcelo D. Ackermann , Fred Bijkerk","doi":"10.1016/j.matchemphys.2026.132143","DOIUrl":"10.1016/j.matchemphys.2026.132143","url":null,"abstract":"<div><div>We report a systematic experimental study of the resistance of thin film metal oxides (MO<sub>x</sub>) to chemical reduction by atomic hydrogen (H*) at 700 °C. Thin films of Y<sub>2</sub>O<sub>3</sub>, HfO<sub>2</sub>, ZrO<sub>2</sub>, TiO<sub>2</sub>, Nb<sub>2</sub>O<sub>5</sub> and Al<sub>2</sub>O<sub>3</sub> are selected based on their relevance to various coating applications in, for instance, integrated circuits and extreme ultraviolet lithography (EUVL) scanners. In the study 15–20 nm thick MO<sub>x</sub> thin films were thermally annealed at 900 °C and thus stabilized before exposure to H* at 700 °C. Comprehensive characterization using X-ray photoelectron spectroscopy, X-ray reflectivity, X-ray diffraction, atomic force microscopy, and <em>in-situ</em> ellipsometry revealed two distinct categories of behavior, which are combined with equilibrium thermodynamics assessments. Upon exposure to H*, Y<sub>2</sub>O<sub>3</sub>, HfO<sub>2</sub>, ZrO<sub>2</sub>, and Al<sub>2</sub>O<sub>3</sub> exhibited high resistance to reduction, with minor to no morphological, structural or compositional changes, consistent with thermodynamic predictions. In contrast, TiO<sub>2</sub> and Nb<sub>2</sub>O<sub>5</sub> underwent phase transformation and reduction to lower oxidation states. At present systematic reports in the literature of MO<sub>x</sub> interaction and their reducibility by H* are scarce. We here provide insight into general trends of MO<sub>x</sub> stability that is relevant for the need of chemically stable coatings in reactive environments like H*, but also low-ion energy H plasmas that reside in EUVL scanners.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132143"},"PeriodicalIF":4.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190775","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

Novel features of the ac conductivity, dielectric response, ferroelectric polarization and magnetoelectric coupling in M-type hexaferrite BaFe12O19 m型六铁氧体BaFe12O19交流电导率、介电响应、铁电极化和磁电耦合的新特性

IF 4.7 3区材料科学

Materials Chemistry and Physics Pub Date : 2026-04-15 Epub Date: 2026-02-05 DOI: 10.1016/j.matchemphys.2026.132142

Gara Kishor, R.N. Bhowmik

{"title":"Novel features of the ac conductivity, dielectric response, ferroelectric polarization and magnetoelectric coupling in M-type hexaferrite BaFe12O19","authors":"Gara Kishor, R.N. Bhowmik","doi":"10.1016/j.matchemphys.2026.132142","DOIUrl":"10.1016/j.matchemphys.2026.132142","url":null,"abstract":"<div><div>We report a comprehensive understanding of the dielectric, ferroelectric, and electrical transport properties of BaFe<sub>12</sub>O<sub>19</sub>, a typical M-type hexaferrite, over a wide temperature (123–523 K) and frequency (1 Hz–20 MHz) range. The analysis of ac conductivity, complex impedance, electric modulus and relative dielectric permittivity spectra indicated that both dipolar polarization and electronic charge transport contributed to the electrical response. The temperature evolution of electrical transport reveals successive changes in conduction mechanism, reflecting transitions of electrical conductivity between metallic-like state and semiconductor state associated with reorganization of the contributions from grain and grain-boundary in the sample depending on the range of temperature and applied ac field frequency. At low temperatures, the freezing of electric dipoles corresponds to a quantum-paraelectric state and nearly constant loss behaviour, while intermediate temperatures showed frustrated ferroelectric and relaxor state due to the competition between dipolar contribution and electronic conductivity. A phase boundary between the dipolar polarization and electronic conduction has been established, which shifts to higher temperature at higher applied frequency. A stable ferroelectric state has been indicated at higher temperatures and frequencies. The material showed a reasonably strong magneto-electric response at room temperature with magneto-electric coupling coefficient in the range of 7 – 17 mV cm<sup>−1</sup> Oe <sup>−1</sup>.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132142"},"PeriodicalIF":4.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191917","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

Laser stabilization of polyacrylonitrile fibers 聚丙烯腈纤维的激光稳定

IF 4.7 3区材料科学

Materials Chemistry and Physics Pub Date : 2026-04-15 Epub Date: 2026-02-02 DOI: 10.1016/j.matchemphys.2026.132161

Hanyu Zhang , Fei Wang , Xinyu Wang , Yuyao Li , Jiahui Li , Ming Tian , Kuan Luo , Zhongmin Su

{"title":"Laser stabilization of polyacrylonitrile fibers","authors":"Hanyu Zhang , Fei Wang , Xinyu Wang , Yuyao Li , Jiahui Li , Ming Tian , Kuan Luo , Zhongmin Su","doi":"10.1016/j.matchemphys.2026.132161","DOIUrl":"10.1016/j.matchemphys.2026.132161","url":null,"abstract":"<div><div>To overcome the prolonged processing time and high energy consumption issues in conventional polyacrylonitrile (PAN)-based carbon fiber production, this study presents an advanced laser stabilization technique employing uniform-intensity laser irradiation. Through color difference analysis and chemical analysis methods, the color evolution process of polyacrylonitrile fibers after laser pre-oxidation was studied, and the temperature characteristics of laser irradiated PAN-based pre-oxidized fibers of different colors were analyzed and discussed. To solve the problems of low absorption rate of near-infrared laser by polyacrylonitrile fibers and easy melting during irradiation, starting from the absorption characteristics of laser at different pre-oxidation stages, a long-wave infrared 10.6 μm laser pre-irradiation scheme was proposed. Subsequently, a three-stage 976 nm near-infrared laser treatment with precise modulation of the critical stable temperature was carried out to optimize the stability effect.The resulting laser-stabilized fibers demonstrate exceptional quality with a Raman R-value of 1.78, reduced crystallite size (2.08 nm), achieving 98.3% stabilization index and 8.04% oxygen content, marking significant improvements in both structural characteristics and processing efficiency over conventional methods.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132161"},"PeriodicalIF":4.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190782","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

Reactive gas-timing control for photo-responsive TiO2 slanted nanorod films fabricated by oblique angle magnetron sputtering 斜角磁控溅射制备TiO2斜纳米棒光响应膜的反应气相定时控制

IF 4.7 3区材料科学

Materials Chemistry and Physics Pub Date : 2026-04-15 Epub Date: 2026-02-04 DOI: 10.1016/j.matchemphys.2026.132157

Sirilak Wongthawachnugool , Saksorn Limwichean , Tossaporn Lertvanithphol , Viyapol Pattanasettakul , Pacharamon Somboonsaksri , Hideki Nakajima , Mati Horprathum , Napat Triroj , Papot Jaroenapibal

{"title":"Reactive gas-timing control for photo-responsive TiO2 slanted nanorod films fabricated by oblique angle magnetron sputtering","authors":"Sirilak Wongthawachnugool , Saksorn Limwichean , Tossaporn Lertvanithphol , Viyapol Pattanasettakul , Pacharamon Somboonsaksri , Hideki Nakajima , Mati Horprathum , Napat Triroj , Papot Jaroenapibal","doi":"10.1016/j.matchemphys.2026.132157","DOIUrl":"10.1016/j.matchemphys.2026.132157","url":null,"abstract":"<div><div>Slanted TiO<sub>2</sub> nanorod (SNR) films were fabricated by combining reactive gas-timing (RGT) with oblique angle deposition (OAD) in DC magnetron sputtering. The influence of Ar/O<sub>2</sub> on-off sequences on film morphology, crystallinity, chemistry, and wettability was systematically investigated. Compared with the conventional continuous gas flow method, the RGT process increased deposition rates up to sevenfold and enabled control of nanorod porosity and surface chemistry. XPS revealed that RGT films contained a higher density of polarizable terminal hydroxyl groups, which act as hole-trapping sites and promote surface reactivity and improve photoinduced wettability. This surface chemistry, despite the amorphous nature of the films, resulted in superior photoinduced hydrophilicity. In particular, the RGT 20:10 condition exhibited a dramatic reduction in water contact angle from 70.2° to 8.2° after UV exposure, with excellent cycling stability. These results demonstrate RGT-OAD as a scalable route for photo-responsive, self-cleaning coatings and transparent device applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132157"},"PeriodicalIF":4.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190781","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

Efficient photo-assisted desulfurization of real gas oil using CaFe2O4@SnO2 heterostructure catalyst under visible light irradiation 利用CaFe2O4@SnO2异质结构催化剂在可见光照射下的光辅助脱硫研究

IF 4.7 3区材料科学

Materials Chemistry and Physics Pub Date : 2026-04-15 Epub Date: 2026-02-07 DOI: 10.1016/j.matchemphys.2026.132189

Asmaa A. Abdelrahman , Wael A. Aboutaleb , Doaa I. Osman , Asmaa I. Zahran

{"title":"Efficient photo-assisted desulfurization of real gas oil using CaFe2O4@SnO2 heterostructure catalyst under visible light irradiation","authors":"Asmaa A. Abdelrahman , Wael A. Aboutaleb , Doaa I. Osman , Asmaa I. Zahran","doi":"10.1016/j.matchemphys.2026.132189","DOIUrl":"10.1016/j.matchemphys.2026.132189","url":null,"abstract":"<div><div>This study introduces an innovative technique for removing sulfur compounds from gas oil with a high sulfur concentration by irradiating it with visible light applying a multiple active site CaFe<sub>2</sub>O<sub>4</sub>@SnO<sub>2</sub> material as a novel photo-desulfurization catalyst. For comparison, pure SnO<sub>2</sub>, CaFe<sub>2</sub>O<sub>4</sub> and CaFe<sub>2</sub>O<sub>4</sub>@SnO<sub>2</sub> were fabricated by modified sol-gel method. The physicochemical characteristics of the synthesized samples were examined by XRD, XPS, BET, SEM, FTIR, UV-vis-DRS and PL technique in order to optimize photodesulfurization. PL and Tauc curves proved the lowest band gab value assigned to CaFe<sub>2</sub>O<sub>4</sub>@SnO<sub>2</sub>. and SEM results revealed the formation of CaFe<sub>2</sub>O<sub>4</sub>@SnO<sub>2</sub> nano-composite.</div><div>The CaFe<sub>2</sub>O<sub>4</sub>@SnO<sub>2</sub> exhibited excellent desulfurization performance; achieving sulfur removal efficiency of 96.5% under the optimized conditions (3 g/L photocatalyst dosage, H<sub>2</sub>O<sub>2</sub>/oil of 4:1 for 30 min and DMF solvent to oil volume ratio of 4:1) and our results indicate remarkable selectivity and recyclability in desulfurization, presenting an alternative viewpoint in the search for effective desulfurization technology. The reaction mechanism was also provided.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132189"},"PeriodicalIF":4.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191595","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

Magnetism of Fe- and/or Co-enriched layer/TiO2/Ti composites Fe-和/或co -富集层/TiO2/Ti复合材料的磁性

IF 4.7 3区材料科学

Materials Chemistry and Physics Pub Date : 2026-04-15 Epub Date: 2026-02-06 DOI: 10.1016/j.matchemphys.2026.132201

M.V. Adigamova, I.V. Lukiyanchuk, V.P. Morozova, I.A. Tkachenko, K.A. Saiankina, I.V. Malyshev

{"title":"Magnetism of Fe- and/or Co-enriched layer/TiO2/Ti composites","authors":"M.V. Adigamova, I.V. Lukiyanchuk, V.P. Morozova, I.A. Tkachenko, K.A. Saiankina, I.V. Malyshev","doi":"10.1016/j.matchemphys.2026.132201","DOIUrl":"10.1016/j.matchemphys.2026.132201","url":null,"abstract":"<div><div>Ti-supported surface structures with magnetic properties were prepared at constant current density of 0.15 A/cm<sup>2</sup> for 10 min using plasma electrolytic oxidation (PEO) in slurry electrolytes with solid particles of Fe(OH)<sub>3</sub> and Co(OH)<sub>2</sub> formed <em>in situ</em> in different ratios at their constant total concentration. The general electrolyte formula (mol/L) can be written as 0.066 Na<sub>3</sub>PO<sub>4</sub> + 0.034 Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub> + 0.006 Na<sub>2</sub>WO<sub>4</sub> + 0.08 (Fe(III) + Co(II)). The coatings were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), electron probe microanalysis (EPMA) and magnetometry based on superconducting quantum interference device (SQUID). With an increase in the proportion of Co(OH)<sub>2</sub> particles in the electrolyte, the coatings were formed at higher voltages, which caused an increase in their thickness (from 25 to 82 μm) and porosity (from 27 to 35%). As to EPMA/EDX data, the coatings contained up to 6.5/15.8 at% Fe and 6.5/12.5 at% Co, depending on the electrolyte formula. Open pores with particles and closed pores contained up to 25.3 at% Fe and up to 26.1 at% Co. At room temperature, with increasing Co proportion in the coatings, the values of coercive force and saturation magnetization increased from 72 to 292 Oe and from 0.05 to 0.048 emu/g, respectively. At 3 K, the coercive force value in mixed coatings was lower (94–160 Oe) than that in individual coatings containing only one magnetic element (230 Oe). No synergistic effect was observed in mixed Fe-, Co-containing coatings either at room temperature or at helium temperature.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132201"},"PeriodicalIF":4.7,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191919","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}

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