Research on Chemical Intermediates最新文献

{"title":"Enhanced photocatalytic oxidation activity of supramolecular self-assembled spherical binuclear Zn2Pc2(EP)4/g-C3N4 via π-π stacking interactions for dye-containing wastewater","authors":"Yuqi Liu,&nbsp;Qiuxuan Ren,&nbsp;Jiaojiao Xu,&nbsp;Zhenguo Liu,&nbsp;Zhijun Liu,&nbsp;Haiyan Yan,&nbsp;Gai Zhang","doi":"10.1007/s11164-026-06094-w","DOIUrl":"10.1007/s11164-026-06094-w","url":null,"abstract":"<div><p>Enhanced photocatalytic degradation of dyes in wastewater remains a major focus in environmental research. Herein, a novel spherical binuclear metallophthalocyanine (Zn₂Pc₂(EP)₄) featuring a planar conjugated structure was self-assembled onto g-C₃N₄ via π-π stacking interactions. This self-assembly, achieved through a facile “in situ” hydrothermal method, resulted in the construction of a g-C₃N₄/Zn₂Pc₂(EP)₄ biomimetic photocatalyst. A strong π-π stacking interaction between Zn₂Pc₂(EP)₄ and g-C₃N₄ is evidenced by the red shift of the Q-band absorption peak and the elevated Zn 2p_3/2 binding energy. Furthermore, the luminescence intensity of g-C₃N₄/Zn₂Pc₂(EP)₄ decreases to 53% of that of pure g-C₃N₄, indicating that the π-π stacking interaction promotes the separation of photogenerated electron–hole pairs. The g-C₃N₄/Zn₂Pc₂(EP)₄ photocatalysts showed good photocatalytic oxidation activity toward methylene blue. The catalytic efficiency of g-C₃N₄/Zn₂Pc₂(EP)₄ for methylene blue reaches 85.1% after 3h of treatment at room temperature, which is 1.94 times higher than that of pure g-C₃N₄. The measured first-order kinetic rate constant is 0.0086 min⁻¹, exhibiting a 3.44-fold enhancement relative to that of pure g-C₃N₄. Mechanistic investigations indicated that the highly reactive intermediate g-C₃N₄(e⁻)/[Zn₂Pc₂(EP)₄]⁺–^*O₂ significantly promoted the photocatalytic oxidative degradation of methylene blue in wastewater. The self-assembled supramolecular g-C₃N₄/Zn₂Pc₂(EP)₄ offers great potential for developing high-efficiency and environmentally friendly photocatalysts for dye-containing wastewater.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"52 10","pages":"7215 - 7230"},"PeriodicalIF":3.3,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photocatalytic gaseous ammonia abatement: Performance and mechanism of BiOX (X = Cl, Br, I)","authors":"Boyi He,&nbsp;Hongxia Chen,&nbsp;Jinxia Liang,&nbsp;Yihan Li,&nbsp;Bo Peng,&nbsp;Xu Zhang,&nbsp;Baozhong Zhang,&nbsp;Hanyu Chen,&nbsp;Kunfeng Zhang","doi":"10.1007/s11164-026-06095-9","DOIUrl":"10.1007/s11164-026-06095-9","url":null,"abstract":"<div><p>Transforming ammonia (NH₃) gaseous pollutant into harmless N₂ and H₂O is an effective approach for NH₃ elimination. To this end, three bismuth oxyhalide (BiOX, X = Cl, Br, and I) were synthesized and employed for photocatalytic oxidation of NH₃. Investigations demonstrated that although BiOCl and BiOBr possessed relatively narrow light-response ranges, their photogenerated holes exhibited strong oxidation ability and could activate N–H bonds, thereby enabling the efficient conversion of NH₃. In contrast, BiOI, which possessed broader spectral absorption, failed to drive the NH₃ oxidation process owing to its relatively high valence band position. Benefiting from its fast charge separation efficiency, suitable band structure, and effective N–H bond activation, BiOBr exhibited better photocatalytic activity. The reaction rate of NH₃ oxidation over BiOBr was 2.23-fold higher than that of BiOCl. More importantly, abundant surface oxygen vacancies could be formed under light irradiation. Consequently, the photocatalytic conversion efficiency of BiOBr was gradually improved with increasing cycle numbers. This work expands the application scenarios of Bi-based semiconductors and provides valuable insights for the rational design of efficient photocatalysts for NH₃ abatement.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"52 10","pages":"7185 - 7198"},"PeriodicalIF":3.3,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable agar-based gel-entrapped GO-ZnO nanocomposite blocks for sunlight-driven photodegradation of hazardous cationic dyes","authors":"Dhanshri V. Patil,&nbsp;Vishal S. Patil,&nbsp;Suraj R. Attar,&nbsp;Varsha L. Kamble,&nbsp;Asmita S. Tapase,&nbsp;Girish R. Pathade,&nbsp;Sushilkumar A. Jadhav","doi":"10.1007/s11164-026-06086-w","DOIUrl":"10.1007/s11164-026-06086-w","url":null,"abstract":"<div><p>Graphene oxide (GO)-based photocatalysts integrated with metal oxide nanoparticles have emerged as a promising class of advanced materials for sustainable wastewater treatment, owing to their exceptional photocatalytic efficiency in dye degradation under solar irradiation. In this study, a gel-entrapped graphene oxide–zinc oxide (GEL-GO-ZnO@blocks) hybrid material was engineered as an eco-friendly, sunlight-responsive, efficient, and recyclable photocatalyst for the degradation of cationic dyes. The GO was prepared utilizing rice husk to make it a sustainable and cost-effective approach. The synthesized materials were characterized by Scanning Electron Microscopy coupled with Energy-Dispersive X-ray Spectroscopy (SEM–EDX), Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, and Raman spectroscopies. The characterization confirmed the successful formation of ZnO nanoparticles uniformly anchored on GO and effectively immobilized within the agar gel matrix. Photocatalytic degradation of hazardous dyes, namely, Methylene Blue (MB), Crystal Violet (CV), Basic Fuchsin (BF), and Safranin-O (SF-O) was carried out under sunlight. Degradation efficiencies ranged from 78 to 98% upon sunlight exposure. The synergistic effect between GO and ZnO, along with gel entrapment, played a key role in enhancing degradation performance, making the photocatalyst efficient, sustainable, cost-effective, and environmentally benign. The kinetic studies revealed that all dyes followed pseudo-first-order reaction kinetics with high correlation coefficients (R² &gt; 0.96), confirming the reliability of the photocatalytic process. MB showed the highest degradation rate, highlighting the superior efficiency of the GEL-GO-ZnO@blocks. The photocatalyst was reusable through simple filtration and ethanol washing, maintaining performance over several cycles.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"52 10","pages":"7103 - 7122"},"PeriodicalIF":3.3,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Heterointerface nano-architectonics enabling solar hydrogen evolution and pollutant degradation","authors":"Sivasakthi Sethuraman,&nbsp;M. Amarnath,&nbsp;Murali Manickam,&nbsp;Dhanabalan Kandhasamy","doi":"10.1007/s11164-026-06089-7","DOIUrl":"10.1007/s11164-026-06089-7","url":null,"abstract":"<div><p>Heterojunctions have garnered significant interest in photocatalysis due to their capacity to facilitate efficient charge separation and improved interfacial interaction. In this area, designing interfaces composed of nanostructured two-dimensional/one-dimensional (2D/1D) materials remains an excellent way to boost light absorption and tune band structure. The photocatalytic performance of traditional semiconductor systems is constrained by rapid charge carrier recombination, insufficient surface-active sites, and limited utilization of incident light. In this context, nano-architectonics, which integrates nanoscale structural design with controlled interfacial engineering, has emerged as an effective strategy for constructing advanced mixed-dimensional photocatalysts with improved charge transport pathways and enlarged reactive surfaces. Herein, a hetero-structured 2D/1D g-C₃N₄/MnO₂ nanocomposite was successfully fabricated by embedding nanorods within nanosheets. The synthesized mixed nanocomposite was systematically characterized to evaluate its morphology, structural properties, optical behaviour, and chemical composition. Owing to the synergistic effects arising from the designed nano-architectonics, this heterostructure demonstrated significant results in terms of hydrogen generation (up to 4310 μmol g⁻¹ h⁻¹) through water splitting as well as the degradation of methylene blue (MB) dye (97.69% in 50 min), outperforming their individual components. Detailed optical absorption and X-ray photoelectron spectroscopy analyses confirmed the formation of a Z-scheme heterojunction. In this configuration, the photogenerated hot electrons from the nanorods recombine with the holes from the surface of the layers, thereby facilitating efficient charge carrier separation while maintaining strong redox capability during photoexcitation. Furthermore, the presence of defect-induced Mn³⁺ species contributes to improved charge transfer dynamics and photocatalytic activity. Overall, this study highlights the significance of nano-architectonics-guided design in developing engineered 2D/1D heterojunction nanocomposites with superior photocatalytic efficiency, offering promising prospects for sustainable energy conversion and environmental remediation applications.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"52 10","pages":"7153 - 7183"},"PeriodicalIF":3.3,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of g-C3N4@ZIF-8 nanomaterial and its use for rapid removal of alizarin red and ketoprofen from water via chemical catalysis","authors":"Ayse Bayrak,&nbsp;Sevde Demir,&nbsp;Hakan Erer,&nbsp;Ilkay Hilal Gubbuk,&nbsp;Mustafa Ersoz","doi":"10.1007/s11164-026-06082-0","DOIUrl":"10.1007/s11164-026-06082-0","url":null,"abstract":"<div><p>The development of a new catalyst for highly efficient degradation of environmentally harmful pollutants is targeted. In this study, g-C₃N₄@ZIF-8 catalyst was produced to reduce both the widely used drug ketoprofen (KEP) and the harmful organic dye impurity alizarin red S (ARS) from aqueous solutions. ZIF-8 compound containing Zn metal from the MOF group and nanoparticles containing graphitic carbon nitride (g-C₃N₄) were synthesized by easy calcination method, and their structural and surface characterizations were completed. The synthesized g-C₃N₄@ZIF-8 was analyzed XRD, ATR-FTIR, XPS, BET, and SEM–EDX and then used as a catalyst for the catalytic degradation of ARS and KEP. Optimum parameters were determined by investigating the effects of catalyst amount, NaBH₄ concentration, contact time, and pH on the removal mechanism. Furthermore, g-C₃N₄@ZIF-8 demonstrated good stability and reusability in five experiments involving the degradation of KEP and ARS, and a metal leaching study showed that it did not leach a significant amount of zinc into the environment. Zero-order, pseudo-first-order, and second-order kinetic models were used to describe the removal of ARS and KEP. The pseudo-first-order model, with the <i>R</i>² value closest to 1, was found to be suitable, and the <i>k</i> value was calculated by plotting graphs showing the variation between ln[<i>C</i>_<i>t</i>/<i>C</i>₀] and time.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"52 10","pages":"6905 - 6935"},"PeriodicalIF":3.3,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LC–MS-Guided CCD optimization and spectroscopic assignment of regioisomeric azo dyes BAO and BAM with TD-DFT-supported optical behavior","authors":"Myasar Kh. Ibrahim,&nbsp;Shireen R. Mohammed","doi":"10.1007/s11164-026-06088-8","DOIUrl":"10.1007/s11164-026-06088-8","url":null,"abstract":"<p>A regioisomeric azo-coupling system based on diazotized 3-nitroaniline and 4-(dimethylamino)benzaldehyde was investigated to determine how reaction conditions control the formation of the two azo dyes BAO and BAM and how regioisomeric topology affects their structural and optical properties. The effects of acetic acid, aldehyde concentration, and temperature on the BAO/BAM ratio and total azo fraction were evaluated using a central composite design (CCD)-guided experimental design, while LC–MS enabled comparative quantification of reaction mixtures. Across the investigated design space, BAO was obtained as the major regioisomer in all runs, with BAO values of 76–84%, BAM values of 16–24%, BAO/BAM ratios of 3.167–5.250, and total azo fractions of 80–93%. The regioisomers were characterized by FTIR, NMR, GC–MS, and LC–MS, with gauge-independent atomic orbital (GIAO)-calculated chemical shifts supporting the NMR assignments. BAO exhibited moderate solvatochromism, whereas BAM showed a stronger solvatochromic behavior; both compounds displayed reversible acid/base switching for more than 20 cycles. Density functional theory (DFT), time-dependent density functional theory (TD-DFT), and protonation calculations supported the experimental observations, indicating that BAM is the more polarized regioisomer and exhibits greater sensitivity to solvent polarity and protonation. Overall, the study establishes correlations between reaction optimization, regioisomeric distribution, spectroscopic assignment, and medium-responsive optical behavior, providing insight into the influence of substitution topology on the structure–property relationships of azo chromophores.</p>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"52 10","pages":"7273 - 7318"},"PeriodicalIF":3.3,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11164-026-06088-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A mild, efficient one-pot multicomponent synthesis of 1,3-thiazolidin-4-ones using biodegradable PABA as an organocatalyst","authors":"Kajal G. Barhate,&nbsp;Manoj B. Barkate,&nbsp;Navnath T. Hatvate","doi":"10.1007/s11164-026-06077-x","DOIUrl":"10.1007/s11164-026-06077-x","url":null,"abstract":"<div><p>A sustainable, one-pot, multicomponent protocol has been developed for the synthesis of 2,3-diphenyl-1,3-thiazolidin-4-one using <i>p</i>-aminobenzoic acid (PABA) as an inexpensive, eco-friendly, and recyclable organocatalyst. A straightforward and environmentally friendly route to biologically significant heterocyclic scaffolds was provided by the solvent-free reaction of aromatic aldehydes, substituted anilines, and thioglycolic acid. The developed methodology demonstrated a broad substrate range and impressive tolerance to electron-donating, electron-withdrawing, halogenated, nitro-substituted, and heteroaromatic aldehydes, as well as to substituted aniline derivatives, yielding good yields of desired products. The structures of the synthesized compounds were confirmed by ¹H and ¹³C NMR spectroscopy, demonstrating the successful synthesis of the target heterocycles. The PABA catalyst was readily recyclable and reusable in five consecutive cycles, with only a slight decrease in catalytic activity, demonstrating the protocol’s viability and sustainability.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"52 10","pages":"6675 - 6685"},"PeriodicalIF":3.3,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance and reaction path of NO removal by Ir, Co, and Ce–Fe/AC catalysts in the coupled CO + NH3 process at medium and low temperatures","authors":"Fu Yuan,&nbsp;Bangfu Huang,&nbsp;Zhe Shi,&nbsp;Linjing Yang,&nbsp;Keying Zhu,&nbsp;Xingchao Fan,&nbsp;Daoping Zhan","doi":"10.1007/s11164-026-06084-y","DOIUrl":"10.1007/s11164-026-06084-y","url":null,"abstract":"<div><p>In this study, the effects of iron/activated carbon (Fe/AC) catalysts modified with iridium (Ir), cobalt (Co), and cerium (Ce) on the NO removal performance through the coupled CO + NH₃ process at medium and low temperatures were investigated. Then, 1.0Ir, Co, and Ce-12.5Fe/AC catalysts were prepared, and the reaction pathway for the coupled NO removal process was proposed based on ex situ characterization results and previously reported catalytic mechanisms. The results showed that, when compared at the same reaction temperature, the 1.0Co-12.5Fe/AC catalyst exhibited the highest NO removal activity in the coupled CO + NH₃ process. The 1.0Ir-12.5Fe/AC and the 1.0Ce-12.5Fe/AC catalysts exhibited the highest NO removal activity at the medium-temperature stage and the high-temperature stage, respectively. The subsequent loading of the second metal partially blocked the catalyst pores, thus reducing the specific surface area to varying degrees. The bimetallic loading intensified the catalyst <i>γ</i>-Fe₂O₃ diffraction peaks, increased the crystallinity, and deteriorated the dispersion. Additionally, it significantly increased the proportion of Fe²⁺, and the redox reactions occurred between Ir and Fe, Co and Fe, and Ce and Fe. The O_β content after the second metal loading was significantly higher than that of the single-metal loading, thereby improving the NO removal activity of the catalysts.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"52 10","pages":"6937 - 6961"},"PeriodicalIF":3.3,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uracil-functionalized hyper-cross-linked polymers as adsorbents for phenol removal from aqueous solutions","authors":"Zhenghong Luo,&nbsp;Mengru Zhang,&nbsp;Jing Zhao,&nbsp;Dexuan Xiang,&nbsp;Shuangqin Wang,&nbsp;Guoqing Liu,&nbsp;Yan Tang","doi":"10.1007/s11164-026-06085-x","DOIUrl":"10.1007/s11164-026-06085-x","url":null,"abstract":"<div><p>This work presents the synthesis and application of uracil-modified hyper-cross-linked polymers (UHCP-Fe and UHCP-Al) as high-performance adsorbents for phenol removal from aqueous solutions. The materials were fabricated via a two-step procedure involving initial grafting of uracil onto chloromethylated polystyrene, followed by a Friedel–Crafts reaction to form the hyper-cross-linked network. Structural analyses confirmed the successful incorporation of uracil and the formation of hierarchical porous architectures, with S_BET values reaching 352.2 m²/g for UHCP-Fe and 122.9 m²/g for UHCP-Al. The adsorbents demonstrated exceptional phenol adsorption capacities of 146.8 and 133.1 mg/g at 298 K, respectively, attributed to synergistic interactions such as hydrogen bonding, micropore filling, acid-base interactions, and π–π stacking. Adsorption kinetics were best described by a pseudo-second-order model, while equilibrium data were well-fitted to both Langmuir and Freundlich isotherms, with the Langmuir model showing higher correlation coefficients for UHCP-Fe and UHCP-Al. Thermodynamic studies indicated the process was exothermic, with optimal removal (~ 91.4%) occurring at neutral pH and an adsorbent dosage of 1.0 g/50 mL solution. Moreover, UHCP-Fe retained 89.7% of its adsorption capacity after five regeneration cycles, highlighting its reusability. This work demonstrates a sustainable and effective strategy for treating phenol-contaminated wastewater by integrating bio-based uracil motifs with robust hyper-cross-linked polymers networks.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"52 10","pages":"7253 - 7272"},"PeriodicalIF":3.3,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of the method of preparation of SBA-15 Intermediate layer on the performance of palladium membrane supported on porous alumina for hydrogen separation","authors":"Abhishek Anand,&nbsp;Sweta Sharma,&nbsp;Rajesh Kumar Upadhyay,&nbsp;Satya Vir Singh","doi":"10.1007/s11164-026-06080-2","DOIUrl":"10.1007/s11164-026-06080-2","url":null,"abstract":"<div><p>Palladium-based membranes are widely recognised for their excellent hydrogen selectivity and permeability at elevated temperatures, making them promising candidates for hydrogen purification and membrane reactor applications. In this study, Pd composite membranes were fabricated on porous α-Al₂O₃ tubular supports using Pd-doped SBA-15 as an intermediate layer to enhance membrane quality and reduce the Pd selective layer thickness. SBA-15 was synthesised via three different routes: sol–gel, precipitation, and hydrothermal methods, followed by Pd doping to create nucleation sites for Pd film growth. The intermediate layers were deposited on the ceramic supports using vacuum-assisted dip coating, and the Pd selective layer was formed by the electroless pore-plating method. The structural and morphological properties of SBA-15 and Pd-SBA-15 were characterised using XRD, BET surface area analysis, TEM, and SEM. The results confirmed the preservation of the ordered mesoporous SBA-15 structure after Pd incorporation and the formation of a continuous and defect-free Pd selective layer. Hydrogen permeation experiments were conducted between 300 and 400 °C under different pressure conditions. Hydrogen flux showed a linear dependence on the square root pressure difference, confirming Sieverts’ law and the solution–diffusion mechanism. Among the membranes studied, the hydrothermally synthesised Pd-SBA-15 support exhibited the highest hydrogen flux and the lowest activation energy (13.60 kJ mol⁻¹), indicating improved hydrogen transport and reduced mass transfer resistance.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"52 10","pages":"6993 - 7017"},"PeriodicalIF":3.3,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148985433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}