Microporous and Mesoporous Materials最新文献

{"title":"Radiolytic synthesis of silver-zeolite nanocomposites for long-term antibacterial activity","authors":"Mon Bryan Z. Gili ,&nbsp;Mark Laurence V. Cabahug ,&nbsp;Gina B. Abrera ,&nbsp;Vina B. Argayosa ,&nbsp;Shah Qasim Jan ,&nbsp;Manh-Huong Phan ,&nbsp;Jirawat Assawakhajornsak ,&nbsp;Hideki Nakajima ,&nbsp;Marlon T. Conato ,&nbsp;Marienette M. Vega","doi":"10.1016/j.micromeso.2025.114013","DOIUrl":"10.1016/j.micromeso.2025.114013","url":null,"abstract":"<div><div>A green gamma radiolytic method was utilized to synthesize silver-zeolite nanocomposites (Ag/ZeoNCs) using Philippine natural zeolite (PNZ) and synthetic Zeolite 4A, with ι-carrageenan as the food-grade reducing agent. (Ag/ZeoNCs) were irradiated at 5, 10, and 15 kGy doses, facilitating in-situ reduction of Ag⁺ to Ag⁰ without toxic reducing agents or inert gas purging. XRD confirmed the retention of zeolite crystallinity post-irradiation, while TEM revealed bimodal AgNP size distributions (∼2 nm and ∼13 nm), localized primarily on zeolite surfaces. XPS analysis detected both Ag⁺ and Ag⁰ species, with increasing Ag⁰ signal intensity at higher doses, confirming partial reduction. The Ag content in Zeolite 4A samples ranged from 0.0413 to 0.0445 at. %. Antimicrobial indices (AI) for irradiated samples ranged from 0.55 to 0.64 depending on dose and bacterial strain, exceeding that of Ag⁺-exchanged controls (AI = 0.54–0.60). The AI increased with silver nitrate loading, reaching a plateau at 208 μL of 0.2 M AgNO₃ solution, indicating a saturation point for optimal antibacterial efficacy. Over a 5-month period, long-term tests showed an increase in AI from an initial 0.18 to peaks of 0.32 (<em>E. coli</em>) and 0.30 (<em>S. aureus</em>), followed by slight decline while remaining above baseline. These results demonstrate that gamma-radiolytically synthesized Ag/Zeo4ANCs maintain strong, durable antibacterial activity with minimal silver loading (0.0445 at. %), offering a sustainable and effective antimicrobial platform.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114013"},"PeriodicalIF":4.7,"publicationDate":"2025-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145838956","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}

{"title":"Tailoring MIL-101(Cr) via a mixed-ligand strategy for enhanced adsorption of phenolic, pesticide, and dye pollutants: Experimental and DFT insight","authors":"Nuhaa Faaizatunnisa ,&nbsp;Ratna Ediati ,&nbsp;Enis Nadia Md Yusof ,&nbsp;Arif Fadlan ,&nbsp;Muhammad Naufal Ariesta ,&nbsp;Desindy Ramadhani Putri","doi":"10.1016/j.micromeso.2025.113997","DOIUrl":"10.1016/j.micromeso.2025.113997","url":null,"abstract":"<div><div>Organic pollutants, including synthetic dyes, phenolic compounds, and pesticide residues commonly found in wastewater, pose persistent threats to aquatic ecosystem protection. In this study, a mixed-ligand strategy was employed to synthesize MIL-101(Cr) with enhanced adsorption performance toward structurally diverse pollutants, namely methyl orange (MO), 2-naphthol, and carbaryl. The mixed-ligand MIL-101(Cr)-NH₂ was tailored by varying the molar ratio between 1,4-benzenedicarboxylic acid (H₂BDC) and 2-amino-1,4-benzenedicarboxylic acid (NH₂BDC), while nitric acid (HNO₃) was used as a safer, non-toxic alternative to hydrofluoric acid (HF) as the modulator in the hydrothermal synthesis. Notably, the MOF prepared with 75 % NH₂BDC (MILCr75 %) exhibited a significantly higher specific surface area (1754.7 m²/g) compared to pristine MIL-101(Cr) (1094.5 m²/g). Adsorption kinetics followed the pseudo-second-order model, with maximum adsorption capacities of 410.55 mg/g for MO, 67.48 mg/g for 2-naphthol, and 36.31 mg/g for carbaryl. The corresponding rate constants (k₂) were 0.0135 g/mg·min, 0.0119 g/mg·min, and 0.109 g/mg·min, respectively. To complement the experimental results, density functional theory (DFT) calculations were performed to elucidate the electronic properties of the pollutants and their adsorption interactions with the MOF. Furthermore, MILCr75 % demonstrated superior chemical and water stability, retaining removal efficiencies of 77 % for MO and 68 % for 2-naphthol even after five adsorption–desorption cycles. This work highlights the synergistic benefits of mixed-ligand engineering and computational insights in designing robust MOFs for ionic and non-ionic pollutant remediation.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 113997"},"PeriodicalIF":4.7,"publicationDate":"2025-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145838952","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}

{"title":"Steam-assisted crystallisation of impregnated silica – A novel approach for the synthesis of powdered and granulated binder-free MFI zeolites","authors":"Daria O. Bachurina ,&nbsp;Iuliia A. Kislova ,&nbsp;Olga A. Ponomareva ,&nbsp;Vladimir L. Zholobenko ,&nbsp;Irina I. Ivanova","doi":"10.1016/j.micromeso.2025.114001","DOIUrl":"10.1016/j.micromeso.2025.114001","url":null,"abstract":"<div><div>A novel approach for steam-assisted synthesis of zeolite MFI based on the crystallisation of silica grains impregnated with the aqueous solution containing structure directing template, alkali and a source of aluminum has been developed. Both powdered MFI samples and binder-free MFI catalysts have been prepared using this method. It provides significant advantages over conventional hydrothermal crystallisation allowing for 3-5-fold reduction in water and template consumption, while increasing the zeolite yield and autoclave productivity by a factor of 2–3. Furthermore, the synthesis procedure is virtually waste-free making it more environmentally friendly. The physicochemical properties of the materials obtained have been investigated utilising X-ray diffraction, X-ray fluorescence, scanning electron microscopy, low-temperature nitrogen adsorption, and temperature-programmed ammonia desorption, while their catalytic performance has been evaluated in toluene disproportionation. The data demonstrate that MFI zeolites produced by steam-assisted crystallisation of impregnated silica are comparable in physicochemical and catalytic properties to zeolites obtained by the traditional hydrothermal method, and that binder-free granulated MFI zeolite is a promising catalyst for toluene disproportionation.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114001"},"PeriodicalIF":4.7,"publicationDate":"2025-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789883","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}

{"title":"Thermo-mechanochemical interzeolite conversion in water-deficient systems","authors":"Nikola Jakupec ,&nbsp;Erik Uran ,&nbsp;Magdalena Jabłońska ,&nbsp;Krunoslav Užarević ,&nbsp;Ana Palčić","doi":"10.1016/j.micromeso.2025.113981","DOIUrl":"10.1016/j.micromeso.2025.113981","url":null,"abstract":"<div><div>Thermally-controllable mechanochemistry has shown great potential in fast and energy-efficient solid-state interzeolite conversion. In this work, a broader search of effects on mechanochemical interzeolite conversion reactions by variation of temperature, time of reaction, the amount of water in the system, and the seeds present is performed and correlated to reference experiments conducted in the oven without mechanical agitation. The results presented herein indicate an increased tendency for amorphization and desilication in thermo-mechanochemically treated samples, as well as accelerated interzeolite conversion at higher temperatures.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 113981"},"PeriodicalIF":4.7,"publicationDate":"2025-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789880","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}

{"title":"Optimising the structure of mesoporous niobium oxide using evaporation-induced self-assembly synthesis method","authors":"Peter Nadrah ,&nbsp;Mateja Knap ,&nbsp;Erika Švara Fabjan ,&nbsp;Andraž Šuligoj ,&nbsp;Urška Lavrenčič Štangar ,&nbsp;Goran Dražić ,&nbsp;Nataša Novak Tušar ,&nbsp;Andrijana Sever Škapin","doi":"10.1016/j.micromeso.2025.113994","DOIUrl":"10.1016/j.micromeso.2025.113994","url":null,"abstract":"<div><div>To increase the photocatalytic performance of Niobium(V) oxide (Nb₂O₅) it is necessary to increase its accessible surface area. The evaporation-induced self-assembly (EISA) synthesis method is well suited for the synthesis of mesoporous structures, but the optimisation of synthesis parameters for Nb₂O₅ is still limited. In this study, we demonstrate that the synthesis parameters — duration of evaporation, airflow rate, relative humidity and water content in the reaction mixture — significantly affect the specific surface area, mesoporous structure and photocatalytic performance of isopropanol oxidation into acetone of Nb₂O₅. Our results show that a combination of long evaporation duration, low airflow rate, low relative humidity and moderate water content are needed to obtain material with the highest specific surface area (145 m² g⁻¹) and a narrow hysteresis loop in the N₂ sorption isotherm. This material exhibits four times higher photocatalytic activity compared to materials synthesised under less favourable conditions (14.3–17.7 μmol h⁻¹ compared to 3.7 μmol h⁻¹). We also show that the ordered mesoporous structure plays an important role in improving the photocatalytic performance: the materials with a higher degree of order exhibit about two times higher activity than the materials with a lower degree of order with the same specific surface area (10.4–12.1 μmol h⁻¹ compared to 4.9–7.9 μmol h⁻¹). These results provide valuable insights for optimising the synthesis of mesoporous niobium oxide to increase both the specific surface area and photocatalytic performance.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113994"},"PeriodicalIF":4.7,"publicationDate":"2025-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787339","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}

{"title":"Ce-impregnated acid functionalized mesoporous silica as catalyst for ethanol dehydration to ethylene","authors":"Oksana Dudarko ,&nbsp;Veronika Tomina ,&nbsp;Natalia Kobylinska ,&nbsp;Dorota Duraczyńska ,&nbsp;Katarzyna Pamin ,&nbsp;Ewa Serwicka ,&nbsp;Gulaim Seisenbaeva","doi":"10.1016/j.micromeso.2025.114006","DOIUrl":"10.1016/j.micromeso.2025.114006","url":null,"abstract":"<div><div>The catalytic performance of Ce-containing mesoporous silica, functionalized with phenylsulfonic and phenylsulfonic/phosphonic acid groups, was studied for the ethanol dehydration to ethylene reaction in the temperature range of 250 °C–500 °C. The SBA-15-type materials were prepared using a ‘one-pot’ hydrothermal method, and for comparison, the performance of a silica gel with grafted alkylsulfonic groups was also studied. The initial silica supports and Ce-containing catalysts were characterized by XRD, XPS, TEM, SEM/EDX, TGA, zeta potential measurements, etc. The characterization results showed that the morphology, structure, thermal and textural parameters of the catalysts remained largely unchanged following the impregnation of 0.1 M Ce³⁺ ions. The nature, amount, and availability of acid groups in the mesoporous framework were identified as key factors influencing the metal-impregnation process. According to DRIFT-IR spectroscopy, the functionalization with sulfonic groups binding Ce³⁺ ions led to the generation of Brønsted (B) and Lewis (L) acid sites, respectively. Importantly, the thermal stability analysis revealed that the number of strong B-sites rapidly diminished during desorption up to 500 °C, resulting in a notable decrease in the B/L ratio after treatment at high temperatures. At the same time, ethanol conversion and selectivity towards ethylene were found to augment with increased reaction temperature to 500 °C. The SBA/PhSO₃H/Ce catalyst demonstrated superior overall performance, characterized by high ethanol conversion (95 %) and the most favourable kinetic profile, including the lowest activation energy (48.2 kJ/mol) among all materials. In contrast, the Ce-containing SiO₂SO₃H/Ce catalyst exhibited the highest TON (5223.6 per hour), indicating superior intrinsic efficiency per active site. The reusability of the obtained catalysts in terms of stability and conversion was explained using a range of instrumental methods.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114006"},"PeriodicalIF":4.7,"publicationDate":"2025-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789885","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}

{"title":"Dual-phase nicotine adsorption by phenolic hydroxyl-enriched activated carbon","authors":"Hongyu Liu ,&nbsp;Yufan Wang ,&nbsp;Tongguang Xu ,&nbsp;Haoyu Bu ,&nbsp;Qian Kong ,&nbsp;Huatong Li ,&nbsp;Haixiao Sun ,&nbsp;Zhaoshuo Yuan ,&nbsp;Linglong Yao ,&nbsp;Xuelian Zhang ,&nbsp;Xin Zhang","doi":"10.1016/j.micromeso.2025.113975","DOIUrl":"10.1016/j.micromeso.2025.113975","url":null,"abstract":"<div><div>Nicotine, being the highly toxic, strongly addictive, and poorly biodegradable alkaloid, posing dual threats to human health and ecological systems. However, current nicotine adsorbents are plagued by issues such as high costs, limited adsorption capacity, and restricted environmental adaptability. In this study, through pre-treatment and persulfate ammonium oxidation modification methods, oxidized activated carbon (AC-A-APS) was successfully synthesized. Aqueous-phase adsorption experiments demonstrated that modified activated carbon (AC-A-APS) achieved an equilibrium adsorption capacity (q_e) of 151.4 mg g⁻¹ based on the Langmuir model for nicotine, representing a 59 % enhancement compared to the original activated carbon (AC, 95.2 mg g⁻¹). In laboratory simulation device testing and smoking machine trials, AC-A-APS exhibited nicotine aerosol retention efficiencies of 90.1 % and 84.7 %, respectively. This study significantly increased the specific surface area of activated carbon and enriched oxygen-containing groups through acid washing and ammonium persulfate oxidation treatment demonstrated by N₂ adsorption-desorption, NH₃-TPD characterizations. By modulating the pore structure and surface acidic functional groups, the adsorption and capture efficiency of nicotine in both aqueous solution and gaseous states can be synergistically enhanced. The study provides key theoretical and technical support for developing high-performance, renewable adsorbents for wastewater treatment and cigarette filters.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 113975"},"PeriodicalIF":4.7,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789879","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}

{"title":"From controlled doping to efficient catalysis: MOF-derived Ce-Mn oxides for selective alkene oxidation","authors":"Wenwen Li,&nbsp;Zhigang Zhang,&nbsp;Yuntao Hu,&nbsp;Guangbing Zheng,&nbsp;Hongyan Xu,&nbsp;Huaiqing Zhao","doi":"10.1016/j.micromeso.2025.113999","DOIUrl":"10.1016/j.micromeso.2025.113999","url":null,"abstract":"<div><div>In recent years, MOF-templated pyrolysis has emerged as a novel strategy for the synthesis of composite transition metal oxides with unique structures. Herein, binary metal oxides composites MnO_x/CeO₂ derived from MOF were successfully synthesized and applied for the selective oxidation of alkenes. The results indicate that the reaction pathway is critically determined by the employment of solvent. The selective epoxidation of alkenes was achieved with this catalyst in organic solvents, whereas the oxidation of alkenes to the corresponding carbonyl compounds was achieved in aqueous media. A series of characterization techniques on the catalyst revealed that the excellent catalytic performance is attributed to the synergy of Ce-Mn bimetallic oxides, the Mn³⁺/Ce⁴⁺ → Mn⁴⁺/Ce³⁺ redox cycle, and abundant oxygen vacancies. Furthermore, the catalyst demonstrated excellent structural stability and reusability performance, maintaining its catalytic activity over ten consecutive reaction cycles. Additionally, mechanistic investigations revealed the involvement of a radical pathway in the catalytic reactions.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 113999"},"PeriodicalIF":4.7,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145838951","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}

{"title":"Enhanced sodium removal from single-component solutions, groundwater and anodizing wastewater using NH4Cl-modified mexican natural zeolites","authors":"Andrea Alejandra Acosta-Herrera ,&nbsp;Virginia Hernández-Montoya ,&nbsp;Miguel A. Montes-Morán ,&nbsp;Yessenia de Lara Ramos ,&nbsp;Paola Sarahí De Velasco-Maldonado","doi":"10.1016/j.micromeso.2025.114005","DOIUrl":"10.1016/j.micromeso.2025.114005","url":null,"abstract":"<div><div>In this study, two natural Mexican clinoptilolites (ZN-SLP and ZN-SON) were modified to significantly enhance their cation-exchange properties, making them attractive low-cost materials for Na ⁺ removal from groundwater and anodizing wastewater. The modification includes a chemical treatment with NH₄Cl and subsequently, a thermal-microwave treatment. A Taguchi experimental design was applied to identify optimal modification conditions, and the samples were used in Na⁺ adsorption studies employing single component solutions in batch systems. The most efficient modified zeolites were employed in the adsorption of Na⁺ from groundwater and anodizing wastewater. The results with single component solutions are indicating that the chemical–thermal-radiation modification increased the Na⁺ adsorption capacity of ZN-SLP from 2.05 to 11.86 mg/g and from 3.65 to 15.92 mg/g for ZN-SON. This behavior can be associated with the chemical and physical characteristics of zeolites with and without modification, where the surface characterization revealed that modification decreased the pH_PZC of ZN-SLP from 4.74 to 4.63 and from 4.91 to 4.53 for ZN-SON and consequently, the acidity of zeolites increased after the modification. FT-IR spectra revealed enhanced hydroxylation and framework distortion after treatment and the SEM images confirmed increased surface roughness and microfracturing. Also, textural analysis showed that for ZN-SLP the BET surface area increases from 16.0 to 20.6 m²/g after modification and for ZN-SON decreased slightly from 10.1 to 9.4 m²/g. Finally, it is very important to note that in real matrices (groundwater and anodizing wastewater), Na⁺ adsorption decreased due to ionic competition: from 12.0 to 6.7 mg/g for (ZN-SLP-OP) and from 16.0 to 9.3 mg/g (ZN-SON-OP) in anodizing wastewater, and 6.7–9.6 mg/g in well waters, yet removal efficiencies consistently remained above 26 %. Additionally, significant co-removal of SO₄²⁻ (up to 80 %), PO₄³⁻ (92–99 %), and NO₃⁻ (up to 73 %) was observed depending on the matrix, while F⁻ removal ranged from 6 to 45 %. These results demonstrate that modified Mexican zeolites retain structural stability and exhibit robust performance under complex ionic conditions, confirming their potential as cost-effective, scalable adsorbents for Na⁺ removal in both synthetic and real water systems.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114005"},"PeriodicalIF":4.7,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789884","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}

{"title":"PdCu alloy nanoparticles confined in hollow porous silica nanospheres for alkyne semi-hydrogenation","authors":"Yiting Peng ,&nbsp;Qianqian Zhou ,&nbsp;Lei Wang ,&nbsp;Pengcheng Wang ,&nbsp;Shenghu Zhou","doi":"10.1016/j.micromeso.2025.114002","DOIUrl":"10.1016/j.micromeso.2025.114002","url":null,"abstract":"<div><div>Olefins generated from semi-hydrogenations of alkynes are important intermediates for the synthesis of spices, pharmaceuticals, pesticides and polymers. However, semi-hydrogenations of alkynes remain challenging to achieve both high catalytic activity and selectivity under mild conditions due to the easy over-hydrogenation. In this study, we report the synthesis of PdCu alloy nanoparticles encapsulated in hollow porous silica nanospheres (PdCu@HPSNs) for semi-hydrogenations of alkynes. The mentioned materials were synthesized by a templating method in a reverse microemulsion system, and feature small PdCu nanoparticles inside hollow cavities. Under mild conditions and a substrate/Pd molar ratio of 1000/1, the optimized Pd₁Cu_0.5@HPSNs achieved complete conversion of 2-methyl-3-butyn-2-ol at 18 min with 2-methyl-3-buten-2-ol selectivity of up to 96.7 %. In addition, the catalysts are recyclable, and show much better performance for semi-hydrogenations of a series of alkynes than their monometallic analogues. The enhancement can be ascribed to the formation of PdCu alloy inside hollow silica nanospheres, where the Pd-Cu interaction improves the semi-hydrogenation performance, and the silica shells protect inner nanoparticles to increase their stability.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114002"},"PeriodicalIF":4.7,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789878","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}