Materials Advances最新文献

{"title":"Microstructured thermo-responsive double network granular hydrogels†","authors":"Alexandra Thoma, Reece Whatmore and Esther Amstad","doi":"10.1039/D5MA00511F","DOIUrl":"10.1039/D5MA00511F","url":null,"abstract":"<p >Many hydrogels respond to external stimuli such as changes in temperature, pH, or salt concentrations by changing their degree of swelling, and hence mechanical properties, rendering them attractive actuators. Unfortunately, response rates of many of these hydrogels are limited because they rely on the diffusion of water, which is relatively slow within the gel. Here, we introduce thermo-responsive granular hydrogels which combine accelerated response rates with load-bearing properties. To accelerate the response to temperature changes, we formulate poly(<em>N</em>-isopropylacrylamide) (PNIPAM) microgels with connected pores by leveraging phase separations. To impart the porous hydrogel load-bearing properties, we formulate them as thermo-responsive double network granular hydrogels (TDNGHs). We demonstrate that the granular structure combined with the open micropores located within the microfragments increase the response-rate of these gels 3-fold compared to that of bulk counterparts. Moreover, the granular material exhibits 18-fold enhanced work of fracture compared to the bulk. The granular structure adds an additional benefit: it renders them 3D printable. We co-process thermo-responsive hydrogels with a non-responsive counterpart to fabricate a bilayer, which lifts up to 85% of its weight if heated and 3D print a butterfly as a bilayer structure that bends its wings when exposed to elevated temperatures.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 15","pages":" 5089-5099"},"PeriodicalIF":5.2,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12186764/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144506121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A DFT insight into lead free double halide perovskite Cs2TeI6 for clean and renewable energy sources","authors":"Md. Sajib Hossian, Md. Majibul Haque Babu, Alamgir Kabir, Ahmed Azzouz Rached and Md. Ibrahim Kholil","doi":"10.1039/D5MA00043B","DOIUrl":"https://doi.org/10.1039/D5MA00043B","url":null,"abstract":"<p >In this study, we investigate the lead free double halide perovskite Cs<small>₂</small>TeI<small>₆</small> using first-principles density functional theory (DFT) calculations to explore its potential as a photocatalyst for water splitting. We employ multiple exchange–correlation functionals to comprehensively evaluate the material's mechanical, electronic, and optical properties. The elastic constants, bulk modulus, and hardness indicate that Cs<small>₂</small>TeI<small>₆</small> is mechanically stable and ductile, with a Vickers hardness value between 0.13–2.28 GPa. The band structure analysis reveals an indirect bandgap ranging from 1.268 to 2.058 eV, depending on the functional used. Optical property simulations demonstrate significant absorption in the visible range, with the calculated redox potentials suggesting thermodynamically favorable conditions for the water splitting mechanism. The findings indicate that Cs<small>₂</small>TeI<small>₆</small> is a promising candidate for photocatalytic applications, including solar energy conversion and hydrogen production.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 15","pages":" 5221-5231"},"PeriodicalIF":5.2,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00043b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plasmon-enhanced oxygen reduction reaction using silver nanoparticle-decorated N-doped carbon nanotubes†","authors":"Tereza Jílková, Elena Miliutina, Andrii Trelin, Zdeňka Kolská, Václav Švorčík, Oleksiy Lyutakov and Roman Elashnikov","doi":"10.1039/D5MA00407A","DOIUrl":"https://doi.org/10.1039/D5MA00407A","url":null,"abstract":"<p >The oxygen reduction reaction (ORR) generally limits the efficacy of hydrogen fuel cells, due to its sluggish kinetics. Here, we present an effective plasmon-enhanced catalyst for the ORR, based on silver nanoparticle-decorated carbonized polypyrrole nanotubes (Ag-cPNTs). Silver nanoparticles (AgNPs) were incorporated onto the surface of carbonized polypyrrole nanotubes (cPNTs) using a straightforward and reproducible method without the need for wet synthesis. The cPNTs serve as redox-active supports with a high surface area, while AgNPs efficiently absorb and convert light energy into plasmonic excitation, facilitating oxygen activation. The successful introduction of AgNPs and their uniform morphology and size distribution were observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The analysis of the chemical composition, performed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), confirmed the formation of AgNPs. Having been thoroughly characterized, the performance of the Ag-cPNTs was tested in the ORR under both illumination and dark conditions. LED illumination (455 nm central wavelength) of the prepared plasmon-active catalyst results in an increase of current density and LSV curve shift of potential to more positive values. Overall, a high surface area, porous interconnected structure, and photo-enhanced catalytic activity demonstrated high potential of the prepared composite as a novel catalyst for fuel cell applications.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 14","pages":" 4795-4803"},"PeriodicalIF":5.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00407a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Defect mediated modulation of electrochemical efficacy and stability of Fe3O4 nanodiamond incorporated MoS2 based hierarchical 2D nanostructures for high performance supercapacitor electrodes†","authors":"Md. Raihan Siddiki, Shahid Abubakar Abtahee, Mehedi Hasan, Mizanur Rahaman, Muhammad Rakibul Islam and Md. Abdullah Zubair","doi":"10.1039/D5MA00291E","DOIUrl":"https://doi.org/10.1039/D5MA00291E","url":null,"abstract":"<p >In this study, pristine MoS<small>₂</small> and 1 to 5 wt% Fe<small>₃</small>O<small>₄</small> nanodiamond incorporated MoS<small>₂</small> nanoflowers were synthesized <em>via</em> a facile hydrothermal route to identify the optimal material combination for electrodes in supercapacitors. The nanostructured composite with 3% Fe<small>₃</small>O<small>₄</small> nanodiamonds exhibited an impressive specific capacitance of 712 F g<small>⁻¹</small> at 0.3 A g<small>⁻¹</small> current density and remarkable cyclic stability, with 84% capacitance retention and 103% coulombic efficiency after 10 000 cycles at 2 A g<small>⁻¹</small> current density. The crystallographic and morphological analyses revealed that the improved electrochemical performance of the optimum composition could be attributed to the formation of disorder induced surface active sites and broadening of crystallographic interlayer spacing of MoS<small>₂</small> leading to an enhancement in ionic adsorption, intercalation and surface redox reaction. Additionally, the reduced interface charge transfer resistance for the optimal composition obtained from the EIS analysis could also contribute towards specific capacitance enhancement by facilitating the faradaic process. However, the observed diminution in capacitance by 50% above the optimum Fe<small>₃</small>O<small>₄</small> content (5%) was attributed to a sudden drop in electrolytic channel integrity. The power (45–90 W kg<small>⁻¹</small>) and energy (2.15–3.70 W h kg<small>⁻¹</small>) densities of the material obtained from the two-electrode system setup corresponded to the performance zone of symmetric supercapacitors in the Ragone plot. These findings highlight the Fe<small>₃</small>O<small>₄</small> nanodiamond incorporated MoS<small>₂</small> nanocomposite as a very effective material for high performance supercapacitors, noticeably out-performing other material combinations with different morphologies.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 15","pages":" 5126-5148"},"PeriodicalIF":5.2,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00291e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gold recovery from acidic wastewater using ionic viologen organic and metal–organic framework composites†","authors":"Sk Abdul Wahed, Atikur Hassan and Neeladri Das","doi":"10.1039/D5MA00306G","DOIUrl":"https://doi.org/10.1039/D5MA00306G","url":null,"abstract":"<p >This study reports syntheses of a set of unique ionic hybrid composites to efficiently remove gold anions from acidic wastewater. The hybrid composites were easily obtained using a well-known metal–organic framework (MOF) and an ionic viologen organic framework (iVOF) that were thoroughly characterized. The highest uptake capacity recorded by iVOF-2@MOF_Comp-3 was 1053 mg g<small>⁻¹</small> within three hours. This adsorbent was also able to quantitatively (&gt;99%) remove gold species within fifteen minutes from a highly acidic (pH = 1) aqueous solution with a distribution coefficient (<em>K</em><small>_d</small>) greater than 10<small>⁵</small> mL g<small>⁻¹</small>. The hybrid composite adsorbent could also be recycled easily, thus fulfilling most of the criteria expected in effective adsorbents.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 13","pages":" 4513-4521"},"PeriodicalIF":5.2,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00306g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing the processing parameters of producing Al–Si alloys using sodium fluosilicate via artificial neural network","authors":"Gamal M. A. Mahran, Abdel-Nasser M. Omran, Hassan E. M. Gomaa and Mahamed Abd-El-Hakeem Mahamed","doi":"10.1039/D5MA00142K","DOIUrl":"https://doi.org/10.1039/D5MA00142K","url":null,"abstract":"<p >This study investigates the optimal conditions for producing Al–Si cast alloys by reacting sodium fluorosilicate (Na<small>₂</small>SiF<small>₆</small>) with molten aluminium, employing artificial neural network <em>via</em> the Levenberg–Marquardt algorithm (LMA-ANN). The goal is to identify the lowest reaction times that yield the highest silicon recovery percentages at minimal stirring speeds and reaction temperatures, optimizing processing parameters and economic outcomes. Characterization techniques such as XRD and LOM confirmed the presence of α Al, and a uniform fine fibrous eutectic silicon. Differential thermal analysis (DTA) showed an exothermic peak at approximately 871 °C, indicating a multi-step reaction involving Al and Na<small>₂</small>SiF<small>₆</small>. The efficiency of silicon recovery was directly proportional to the stirring speed and temperature within the reaction time range of 15 to 30 minutes. The cascade-forward back-propagation ANN was trained to optimize silicon recovery, considering reaction time, temperature, and stirring speed. Analysis revealed that higher temperatures led to increased silicon recoveries, with significant gains at higher temperatures for all stirring speeds. The maximum silicon recovery efficiency of 92.14% was obtained with a reaction time of 25.86 minutes, a temperature of 950 °C, and a stirring speed of 600 rpm. This study highlights the effectiveness of the ANN-LMA approach in deriving optimal processing conditions for high-efficiency silicon recovery in Al–Si alloys.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 14","pages":" 4705-4713"},"PeriodicalIF":5.2,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00142k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trifunctional GdCoO3 perovskite electrocatalysts for zinc–air battery and water electrolysis applications†","authors":"Annet Anna Thomas, Anook Nazer Eledath, M. Junaid Bushiri and Azhagumuthu Muthukrishnan","doi":"10.1039/D5MA00193E","DOIUrl":"https://doi.org/10.1039/D5MA00193E","url":null,"abstract":"<p >Oxygen electrocatalysts are fascinating due to the absolute necessity of replacing expensive precious metal catalysts in electrochemical energy storage and conversion systems. The GdCoO<small>₃</small> perovskite on N-doped carbon is synthesised using mechanochemical ball-milling followed by pyrolysis. The GdCoO<small>₃</small> on the N-doped carbon composite exhibits better ORR and OER activity with a minimum Δ<em>E</em> value of 0.74 V compared to many other Gd-based perovskites reported in the literature. This material shows promising mass activities estimated from kinetic current densities for the ORR and OER as 18.4 and 19.4 A g<small>⁻¹</small>, respectively. Besides, the materials show HER activity with an overpotential of 0.241 V and a mass activity of 27.7 A g<small>⁻¹</small>. The zinc–air battery performance was demonstrated with a power density comparable to benchmark catalysts. This study features the potential application of the Gd-based perovskites in the field of electrocatalysis.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 15","pages":" 5064-5073"},"PeriodicalIF":5.2,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00193e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring poly(vinylbenzocyclobutene)-b-poly(4-vinylpyridine) isoporous block copolymer membranes: functionalization and performance optimization†","authors":"Michael Appold, Sofia Rangou, Brigitte Lademann and Volkan Filiz","doi":"10.1039/D5MA00157A","DOIUrl":"https://doi.org/10.1039/D5MA00157A","url":null,"abstract":"<p >Amphiphilic block copolymers are promising candidates for the fabrication of ultrafiltration membranes with an isoporous integral asymmetric structure. Within this study we demonstrate the synthesis and membrane fabrication of the new block copolymer (BCP) poly(vinylbenzocyclobutene)-<em>b</em>-poly(4-vinylpyridine) (PVBCB-<em>b</em>-P4VP). The membranes were fabricated using a self-assembly non-solvent induced phase separation process (SNIPS) resulting in an isoporous integral asymmetric structure comprising a unique foam-like substructure with a homogenous three-dimensional porosity throughout the whole membrane body. The dependence of the membrane formation process on the evaporation time, the polymer concentration of the initial casting solution and the molecular weight as well as the block copolymer composition was investigated. Furthermore, the pore diameters of the BCP membranes were tailor-made by simply adjusting the molecular weight of the pore forming P4VP block segments. Moreover, the BCP membranes were functionalized with octylbromide resulting in quaternized P4VP block segments and consequently in positively charged pores. Finally, water flux and retention measurements with proteins of the pristine and functionalized membranes were demonstrated.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 15","pages":" 5232-5241"},"PeriodicalIF":5.2,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00157a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"External stimuli responsive syneresis of amino acid-based bioactive hydrogels: a sustainable platform for environmental remediation†","authors":"Abhinandan Bera, Ritu Raj Patel, S. Daisy Precilla, Meenakshi Singh, B. Agiesh Kumar, Sudipta Bhowmik, Mayank Varshney and Subhasish Roy","doi":"10.1039/D5MA00274E","DOIUrl":"https://doi.org/10.1039/D5MA00274E","url":null,"abstract":"&lt;p &gt;Syneresis of hydrogels in the presence of external stimuli has potential applications in waste-water treatment and water purification. Fmoc-3-(1-naphthyl)-&lt;small&gt;L&lt;/small&gt;-alanine (&lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt;) and Fmoc-3-(2-naphthyl)-&lt;small&gt;L&lt;/small&gt;-alanine (&lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt;) form stable hydrogels in 50 mM phosphate buffer of pH 7.4 with minimum gelation concentrations (MGCs) 0.0455% (w/v) and 0.0375% (w/v) respectively. This is the first report on hydrogelation of &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; and &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; in phosphate buffer at physiological pH and their external stimuli-responsive syneresis. &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; and &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; are found to be biocompatible and exhibit potent anti-bacterial activity. &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; shows anticancer activity towards the pancreatic cancer cell line, PANC-1 cells. Syneresis of &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; and &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; hydrogels has been studied in the presence of various toxic metal ions and the thioflavin T dye. The hydrogel obtained from &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; shows syneresis in the presence of Hg&lt;small&gt;&lt;sup&gt;II&lt;/sup&gt;&lt;/small&gt; and Ni&lt;small&gt;&lt;sup&gt;II&lt;/sup&gt;&lt;/small&gt; ions selectively and also in the presence of the thioflavin T (&lt;strong&gt;TT&lt;/strong&gt;) dye; however, the hydrogel obtained from &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; shows syneresis only in the presence of the thioflavin T (&lt;strong&gt;TT&lt;/strong&gt;) dye. Structural, mechanical, and morphological characterization have been performed by using X-ray powder diffraction, FT-IR, rheology, and FE-SEM analyses. Interestingly, the absorption of the &lt;strong&gt;TT&lt;/strong&gt; dye from water is more efficient for &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; compared to &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt;. Various spectroscopic experiments have been carried out to estimate the absorption capacity for toxic metal ions and also the &lt;strong&gt;TT&lt;/strong&gt; dye. Minimum amounts of 3.14 mM of 0.6 mL of Hg&lt;small&gt;&lt;sup&gt;II&lt;/sup&gt;&lt;/small&gt; ions, 4.21 mM of 0.3 mL Ni&lt;small&gt;&lt;sup&gt;II&lt;/sup&gt;&lt;/small&gt; ions and 3.14 mM of 0.1 mL of the &lt;strong&gt;TT&lt;/strong&gt; dye for &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; and 3.1361 mM of 0.2 mL of the &lt;strong&gt;TT&lt;/strong&gt; dye for &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; are at least required to be added on top of 2 mL of 0.08% w/v concentration of hydrogels to exhibit syneresis. The absorption capacities for the &lt;strong&gt;TT&lt;/strong&gt; dye are estimated to be 912.51 μg and 981.92 μg from 1000 μg of &lt;strong&gt;TT&lt;/strong&gt; dye solution by 2 mL of &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong&gt; and &lt;strong&gt;Fmoc-&lt;small&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;/small&gt;Nap-A&lt;/strong","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 15","pages":" 5184-5195"},"PeriodicalIF":5.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00274e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An excellent photochemical reduction property of Cr(vi) upon visible light illumination in a hydroxyl-functionalized zirconium-based metal–organic framework†","authors":"My V. Nguyen, Vu T. Luu and An T. D. Phan","doi":"10.1039/D5MA00319A","DOIUrl":"https://doi.org/10.1039/D5MA00319A","url":null,"abstract":"<p >To design a MOF material with an appropriate band gap value for visible light absorption and a rapid photoreduction rate, a Zr-based MOF modified by hydroxyl groups was successfully fabricated, and its Cr(<small>VI</small>) photoreduction performance was investigated. Subsequently, the experimental data revealed an extraordinary Cr(<small>VI</small>) removal efficiency for HCMUE-2, achieving up to 100% reduction after 90 min under irradiation by visible light at pH = 1. In particular, the complete characterization of the material was confirmed through modern analytical procedures, including powder X-ray diffraction (PXRD), Fourier transform infrared (FT-IR) and Raman spectroscopy, thermogravimetric analysis combined with differential scanning calorimetry (TGA-DSC), scanning electron microscopy incorporating energy-dispersive X-ray (SEM-EDX), UV-vis diffuse reflectance spectroscopy (UV-vis/DRS), and X-ray photoelectron spectroscopy (XPS). Notably, HCMUE-2 retains its Cr(<small>VI</small>) photoreduction percentage for five consecutive cycles without any significant decrease. Additional combined experiments proved that the structural robustness and morphology of the material were maintained after the photocatalytic reduction process. A plausible photoreduction mechanism was elucidated mainly through scavenger capture investigations, showing that regulated electrons are the primary reactive species responsible for converting Cr(<small>VI</small>) into Cr(<small>III</small>) under the identified conditions. These findings illustrate that a Zr-based MOF modified by OH moieties is a promising candidate for the photoreduction of highly toxic Cr(<small>VI</small>) contaminants from wastewater in real-life situations.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 14","pages":" 4817-4832"},"PeriodicalIF":5.2,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00319a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}