RARE METALS
·
2026
·Vol. 45
·期 9
·e70493
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IF 12.1
Pei Li,Wei Quan,Weikang Ling,Yushun Han,Jimei Li,Guanlong Wang,Jiliang Ma,Runcang Sun
en This link goes to a English section zh This link goes to a Chinese section Photocatalytic H 2 evolution coupled with biomass upgrading offers a sustainable route for clean energy conversion and high-value chemical synthesis. Herein, an in situ grown S-scheme MnS/MnB-MBene heterojunction (denoted as SM x ) was fabricated via alkaline etching of Mn 2 AlB 2 followed by controlled sulfurization. This strategy effectively removes the Al layer, exposes abundant active sites, and simultaneously establishes an intimate S-scheme heterojunction that promotes spatial charge separation and boosts redox kinetics. The optimized SM6 catalyst achieves a remarkable H 2 evolution rate of 1704.81 μmol g −1 h −1 , along with 99.16% conversion of 5-HMF and 79.42% selectivity toward 5-hydroxymethyl-2-furoic acid (HMFCA). These values correspond to 15.97-fold and 7.7-fold enhancements in H 2 evolution compared to pristine Mn 2 AlB 2 and MnB-MBene, respectively. The spatially separated redox sites—MnB-MBene as oxidation sites and MnS as reduction sites—enable efficient, site-specific catalytic reactions, significantly enhancing overall performance. This study provides a rational design strategy for MBene-based heterojunctions and offers insights into advancing biomass photorefinery coupled with solar fuel production. 摘要 en This link goes to a English section zh This link goes to a Chinese section 光催化析氢耦合生物质高值化转化, 为清洁能源转化与高附加值化学品合成开辟了一条可持续路径。本文通过对Mn 2 AlB 2 进行碱刻蚀并结合可控硫化处理, 原位制备出S型异质结MnS/MnB-MBene复合材料 (记作SM x )。该制备策略可有效去除铝原子层, 暴露出大量活性位点, 同时构建紧密的S型异质结, 进而促进载流子空间分离、加快氧化还原反应动力学过程。经优化的SM6催化剂表现出优异性能:光催化析氢速率达1704.81 μmol g −1 h −1 , 5-羟甲基糠醛(5-HMF)转化率为99.16%, 对5-羟甲基糠醛酸(HMFCA)的选择性达79.42%。相较于纯Mn 2 AlB 2 与MnB-MBene, 其析氢活性分别提升15.97倍和7.7倍。体系中氧化还原位点实现空间分离:MnB-MBene作为氧化活性位点, MnS作为还原活性位点, 可实现位点专一的高效催化反应, 大幅提升整体催化性能。本研究为基于MBene的异质结催化剂提供了合理的设计思路, 也为光驱动生物质精炼耦合太阳能燃料制备领域的发展提供了理论参考。
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JOURNAL OF HAZARDOUS MATERIALS
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2026
·
IF 10.6
Shihe Zhang,Shuo Li,Yijun Tian,Chengna Dai,Ruinian Xu,Biaohua Chen
Cr-Zr/ZSM-5 converts PE at 280 °C to BTX and SAF with 93% selectivity. • Self-supplied H from BTX formation saturates C 9 -C 16 to SAF without external H 2 . • Zr doping lowers dehydrogenation barrier and boosts electron transfer. The catalytic conversion of polyethylene (PE) into a C 6 -C 8 BTX-rich fraction and a C 9 -C 16 SAF-range hydrocarbon fraction provides a potential route for plastic-carbon valorization, where “SAF-range” refers to the aviation-fuel-relevant carbon-number range rather than to specification-compliant finished SAF. However, many reported PE-upcycling routes require elevated temperatures, external H 2 , noble-metal catalysts, or high catalyst-to-feed ratios. Herein, we report a rationally engineered bifunctional Cr-Zr/ZSM-5 catalyst that converts PE at 280 °C and 0.5 MPa into targeted products with a liquid yield of 62 wt% and approximately 90% selectivity within the BTX-rich C 6 -C 8 fraction and SAF-range C 9 -C 16 hydrocarbons. Combined characterization, pyridine-adsorbed FTIR, online mass spectrometry, in situ FTIR, product analysis, and model-surface DFT calculations support a proposed bifunctional reaction network. A proposed reaction network is constructed, in which initial conversion may involve thermal and surface-assisted fragmentation at accessible external/near-external regions. Cr-Zr oxide-related species may subsequently facilitate adsorption, C-H activation, dehydrogenation, and olefin-intermediate formation. The resulting smaller olefinic intermediates can then undergo Brønsted-acid-initiated secondary conversion within the MFI channels, while product formation is accompanied by dynamic, competitive internal hydrogen redistribution without external H 2 . This work bridges atomic-scale engineering with catalytic function, providing a scalable, mechanism-guided platform for plastic waste valorization and establishing a fundamental mechanistic framework for the rational design of tandem catalytic systems in waste-to-fuel conversion. Download: Download high-res image (206KB) Download: Download full-size image
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ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Xin Li,Haoyu Chai,Zhifan Yang,Yucai He,Cuiluan Ma
2,5-Furandimethanol (BHMF) is an important biobased chemical, which can be widely used in the production of fuels, drugs, and polymers. However, BHMF production mainly relies on chemical methods for reduction of 5-hydroxymethylfurfural (HMF), which suffer from low selectivity and environmental concerns. In this study, alcohol dehydrogenase AdhP from Escherichia coli was screened and engineered at residue W84 to generate the 84A mutant, exhibiting a 1.3-fold increase in the catalytic reduction rate compared with the wild-type AdhP at pH 7.0 and 35 °C. Coupling W84A with glucose dehydrogenase (GDH) created the recombinant E. coli AD84 whole-cell catalyst, which might efficiently transform high-titer HMF (1 M) into BHMF (118 g/L) in a yield of 93.3% under 30 °C and pH 7.0 in 6 h. Furthermore, a chemoenzymatic one-pot approach was developed to transform waste bread into BHMF, achieving the valorization of food waste through tandem catalysis with a deep eutectic solvent (DES) chemocatalyst and whole-cell biocatalyst. In a deep eutectic solvent (Betaine:Malic acid:Glycerol)-H2O (10:90, wt/wt) system, waste bread (20.0 g/L) was transformed to 5-HMF at 190 °C for 15 min, with a yield of 26%. Subsequently, E. coli AD84 cells catalyzed the bioreduction of waste bread-derived HMF into BHMF, acquiring a yield of 97% (0.26 g of BHMF/g of bread waste). This work constructed a robust reductase biocatalyst for efficiently transforming high titer of HMF and waste bread-derived HMF into BHMF, providing a sustainable approach for food waste valorization.
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PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Mingsheng Wang,Yunjie Chen,Yanghui Wen,Xiaomei Liu,Chang He,Yi Liu,Minghui Pan,Chao Pang,Hua Li
To overcome biliary stent failures caused by biofilm formation, bile sludge accumulation, and tumor-mediated restenosis, we designed a self-polishing, biodegradable coating by flame-spraying poly(L-lactic acid)/thermoplastic polyurethane (PLLA/TPU) composites incorporated with 5-fluorouracil-loaded covalent organic frameworks (5-FU@COF). This strategy integrates: 1) Programmable self-polishing via synergistic PLLA ester/urethane bond hydrolysis and pH-sensitive COF delamination, ensuring controlled erosion; 2) Mechanoadaptive reinforcement, where 5-FU@COF enhances coating-substrate adhesion by 111% (10FCLU: 3.19 MPa vs. LU:1.51 MPa) through COFs rigid filler anchoring and stress homogenization; and 3) Dual anti-biliary sludge accumulation/tumoricidal therapy enabled by 216.5 nm COF nanospheres achieving 43.1% 5-FU loading. The coatings resist biofouling via electrostatic repulsion and dynamic polishing, reducing bile salt coverage to 11.53% (vs. 47.44% on bare Ti). Biphasic 5-FU release from 10FCLU coating achieves 92.6% tumor Cholangiocarcinoma cell (RBE) inhibition for 3 days, validated by TEM ultrastructural apoptosis markers (nuclear fragmentation; mitochondrial collapse) and Korsmeyer-Peppas release kinetics. This multifunctional drug-loading coating enables next-generation biliary stents with sustained patency.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Rulu Huang,Yongzhi Xiong,Bo Cai,Jianchun Jiang,Kui Wang
Ni/AC prepared by impregnation and in situ chemical reduction on porous carbon • AC anchors and disperses Ni uniformly, enabling an interfacial *H-rich environment • Ni/AC delivers efficient HMF hydrogenation with up to 96.8% DMF selectivity • DFT indicates Ni strongly activates H 2 while moderately adsorbing HMF • Kinetics identifies BHMF→MFA HDO as the rate-determining step guiding DMF formation Developing low-cost catalytic systems for the selective hydrogenation of 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF) is of practical significance. Rational coupling between non-noble metal sites and carbon microenvironments is critical to control hydrogen activation, hydrogenation kinetics, and product selectivity. Here, we construct a series of non-noble metal/porous carbon catalysts (M/AC, M = Ni, Fe, Co, Cu) by impregnation followed by in-situ chemical reduction using biomass-derived porous carbon as the platform and systematically elucidate their structure-performance relationships. Multiscale characterizations collectively establish an oxygen-functionality/pore-confinement microenvironment that governs Ni dispersion and metal-support coupling, thereby tuning interfacial *H availability and its turnover relevant to hydrogenation. Consequently, Ni/AC delivers efficient HMF conversion with a DMF selectivity up to 96.8%. Density functional theory indicates that Ni simultaneously enables favorable H 2 adsorption/dissociation and moderate HMF binding, facilitating the formation of a locally *H-enriched interfacial region. Kinetic fitting further identifies the hydrogenation of 2,5-bis(hydroxymethyl)furan (BHMF) to 5-methyl-2-furanmethanol (MFA) as the rate-determining step, rationalizing the preferential DMF pathway under Ni/AC. On this basis, we propose a transferable porous carbon-Ni coupling strategy in which support oxygenated functionalities and pore architecture co-modulate metal dispersion and interfacial hydrogen chemistry, providing guidance for non-noble metal catalysis toward selective hydrogenation of HMF to DMF. Schematic illustration of the waste to catalyst design concept: coconut shell derived porous activated carbon as a stable support for non-noble metals (M = Ni, Fe, Co, Cu) via impregnation and low-temperature in situ chemical reduction, and applying prepared M/AC catalysts to selective HMF upgrading toward DMF through an interfacial *H-rich microenvironment. Download: Download high-res image (188KB) Download: Download full-size image
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POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2025
·
IF 6.8
Siyu Chen,Yiwen Zhang,Shuang Liu,Juan Ma,Huiling Wang,Wei Chang,Hengfeng Li,Xiaochun Ding,Xuejun Pan,Xuewu Duan
DNA methylation is a key epigenetic regulator of gene expression, yet its role in pigment and ascorbic acid (AsA) metabolism in Rosa roxburghii remains unclear. This study examined the effects of 5-azacytidine (5-azaC), a DNA methyltransferase inhibitor, on postharvest fruit quality after cold storage. 5-azaC treatment reduced decay, delayed the onset of color change, preserved overall fruit brightness, maintained firmness, and suppressed respiration during cold storage. It inhibited chlorophyll a degradation and enhanced zeaxanthin, lutein, α-carotene, phytoene, and violaxanthin levels. 5-azaC enhanced AsA content, accompanied by increased activities of monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), glutathione reductase (GR), ascorbate oxidase (AO), and ascorbate peroxidase (APX). Integrated RNA-seq and WGBS analysis showed that 5-azaC induced carotenoid biosynthesis genes ( RrBCH, RrVDE, RrNSY, RrDXS and RrZE P), with RrVDE hypomethylated. RrMDHAR, RrDHAR, RrAO1, RrGR, RrGALUR, RrGalDH and RrIMPL2 were upregulated by 5-azaC, with reduced DNA methylation levels observed in RrAO1, RrGalDH and RrIMPL2 . Transcription factors RrAP2, RrMYB21, RrMYB44 and RrPosF21-like were induced by 5-azaC, with RrMYB21 hypomethylated. DNA demethylases ( RrROS1 and RrROS1-like ) were upregulated, while methyltransferases ( RrCMT-like, RrMET, RrMDR2 and RrDMR2-like ) were downregulated. Silencing RrAP2, RrMYB21, RrMYB44, RrPosF21-like and RrROS1-like reduced AsA content and downregulated AsA metabolism-related genes in R. roxburghii fruit . These findings provide preliminary evidence that 5-azaC may regulate pigment and AsA metabolism via epigenetic mechanisms during cold storage.
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INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Xiaoying Liu,Haimei Liao,Xingchen Zhu,Wentao Yue,Baojie Liu,Chengrong Qin,Chen Liang,Caoxing Huang,Shuangquan Yao
Lignin nanoparticles (LNPs) can significantly address the heterogeneity of lignin and enhance its application potential. However, the structure activity relationship between the structure of lignin and LNPs has been underexplored. In this study, lignin was extracted using a ternary deep eutectic solvents (DES) of choline chloride (ChCl)/5-sulfosalicylic acid (5Saa)/γ-valerolactone (GVL). The molecular structures of DES Ⅰ-L, DES Ⅱ-L, and DES Ⅲ-L were regulated by varying the temperature (85, 105, and 125 °C). Compared to softwood kraft lignin (SKL), lignin with small molecular weight was obtained. In particular, good homogeneity (PDI 1.55, 1.58, and 1.59) was found. The dispersion stability and pH response of DES Ⅰ-LNPs, DES Ⅱ-LNPs, and DES Ⅲ-LNPs were remarkable. In particular, DES Ⅱ-LNPs was the smallest (32 nm) and exhibited the highest stability (no flocculation within 90 d). DES-LNPs exhibited high shear viscosity, a gentle shear decay trend, low yield stress and shear sensitivity. The phenolic hydroxyl groups rich in lignin promoted the interaction, leading to an increase in the size of LNPs. Fortunately, its smaller molecular weight formed an effective complement. The structure activity relationship between the structure of lignin and LNPs was established, providing theoretical support for the efficient conversion and application of LNPs.
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DALTON TRANSACTIONS
·
2014
·Vol. 44
·期 1
·237-246
·
IF 4.097
Ying Liu,Lining Sun,Jinliang Liu,Yu-Xin Peng,Xiaoqian Ge,Liyi Shi,Wei Huang
A novel mesoporous nanosphere functionalized with 3-(aminopropyl)triethoxysilane (APTES) and 2-(5-bromothiophen)imidazo[4,5-f][1,10]phenanthroline (5-Br-Tip) was synthesized (denoted as Tip-MSS). With the coordinating function of the 5-Br-Tip to lanthanide (Ln) ions, for the first time, LnL3(5-Br-Tip) complexes were linked to the mesoporous nanospheres. The derived materials, named Ln-Tip-MSS (Ln = Eu, Tb, Sm, Nd, Yb), were characterized by Fourier-transform infrared (FT-IR) spectroscopy, TEM, XRD (wide-angle and small-angle), N2 adsorption/desorption analysis, and fluorescence spectroscopy. Upon excitation in the ligand absorption, the Ln-Tip-MSS nanomaterials show characteristic visible (Eu, Tb, Sm) and NIR (Sm, Nd, Yb) luminescence (multicolor emission covered from 450 nm to 1400 nm spectral region). Of importance is that, with low cytotoxicity and good biocompatibility given by the methyl thiazolyl tetrazolium (MTT) assay, the Eu-Tip-MSS was successfully applied to cell imaging in vitro based on the Eu3+ luminescence (under 405 nm excitation).
研究领域:
纳米医学
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生物成像
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材料科学
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分子探针
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化学生物学
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FLUID PHASE EQUILIBRIA
·
2026
·
IF 2.7
Shuo Wang,Jingjing Zhou,Jingjian Li,Yanmin Song,Bowen Zhang,Dandan Han,Junbo Gong
As a key intermediate in the synthesis of anticancer agents, 5′-O-Dimethoxytrityl-N-benzoyl-deoxycytidine (Bz-Dmt-dC) usually presents as a solvate and its purity plays a critical role in the production process. To obtain high purity products quickly and efficiently via crystallization, the solubility data of the compound must first be determined. Therefore, under the premise of ensuring no phase transitions during the measurement process, the solubility of solvates formed by Bz-Dmt-dC in three binary solvent systems (acetonitrile + water, acetone + water, and THF + water) were experimentally determined over the temperature range of 278.15 to 313.15 K at atmospheric pressure using the gravimetric method. The experimental results showed that, for a given solvent type and composition, the solubility of Bz-Dmt-dC increased with increasing temperature. The solubility data of Bz-Dmt-dC were correlated using the modified Apelblat, λ h, and NRTL equations. Among these, the modified Apelblat model provided the best fitting result, as indicated by the lowest average relative deviation (ARD) values of 0.7%.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.3
Hongyu Ding,Yujie Yang,Zhihao Geng,Tan Hu,Shaofan Ge,Ying Tang,Xiyan Wang
The development of high-performance microwave absorbing materials for extreme environments remains a significant challenge. In this work, the microwave absorption properties of a FeCoNiCrMn high-entropy alloy (HEA) were successfully modulated through an MgO doping strategy. A series of FeCoNiCrMn-based composites with MgO doping concentrations of 0, 1, 3, and 5 wt.% were fabricated, followed by annealing at 600 °C for 60 min in a nitrogen atmosphere. Electromagnetic characterization revealed that the doping level plays a critical role in determining the absorption performance. The composite with 3 wt.% MgO exhibited the optimal performance, achieving a minimum reflection loss ( RLₘᵢₙ ) of -55.02 dB and an effective absorption bandwidth ( EAB max ) of 4.4 GHz, while the sample with 1 wt.% MgO also demonstrated excellent absorption properties. Furthermore, the annealing temperature was confirmed to be another critical parameter, as the absorption properties of samples annealed at 500, 550, 650, and 700 ℃ exhibited markedly weaker absorption performance than those annealed at 600 °C. The optimal performance arises from the coupled effect of MgO doping and annealing at 600 °C. This processing window optimizes interfacial polarization and the defect/strain state of the HEA matrix, thereby achieving a favorable balance between impedance matching and attenuation. Beyond presenting a promising HEA-based absorber, this work elucidates the critical synergy between doping and thermal processing in tailoring electromagnetic properties. The understanding of this interplay ultimately provides new insights for designing high-performance microwave-absorbing materials.
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FUEL
·
2026
·
IF 7.8
Xingping Kai,Zhaowei Liu,Tianhua Yang,Tao Zhang,Bingshuo Li,Shiyu Feng,Rundong Li
The development of efficient metal-modified core–shell molecular sieve catalysts for the catalytic co-pyrolysis of lignin and plastics to produce aromatics is an effective way to achieve high-value utilization of waste materials. In this study, x-Fe@HZSM-5/SBA-15 (x-Fe@H/S) catalysts (x represents Si/Al) of HZSM-5 cores with Fe-Si-Al as the backbone were synthesized by isomorphous substitution and covered with an SBA-15 shell. The effects of the Si/Al ratio and Fe isomorphously substituted Al in the catalysts on the product distribution, and the formation characteristics of aromatics were investigated during the co-pyrolysis of dealkalized lignin (DL) and high-density polyethylene (HDPE). The catalyst’s cyclic regeneration performance was also analyzed. The results indicated that the pore size and acidic site distribution of the catalysts could be regulated by the Si/Al ratio, thereby promoting aromatics formation. Among them, 50-Fe@H/S exhibited the best performance, with high activity, appropriate mesopore size, and moderate acidity (0.25 mmol/g), achieving the highest bio-oil content (20.54 wt%) and aromatics content (25.96 area%). Meanwhile, the regenerated 50-Fe@H/S maintained satisfactory catalytic performance. Based on the experimental results, the aromatics formation pathways during catalytic co-pyrolysis over x-Fe@H/S were proposed, and the effects of Fe incorporation were analyzed using density functional theory.
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Journal of Food Measurement and Characterization
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2026
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IF 3.6
Zhang Wen,Shi Manman,Wang Guibin,Cao Fuliang,Su Erzheng
The primary poisonous components in Ginkgo biloba seeds are ginkgotoxin (4’-O-methylpyridoxine, MPN) and its 5’-glucoside (MPN-5’-glucoside, MPNG). When Ginkgo biloba kernels are consumed in excess at one time, the total amount of MPN and MPNG (TMPN) can reach toxic levels. We investigated the effects of four storage methods (room temperature storage, sand storage, 4 °C storage, -20 °C storage) on MPN and MPNG levels and their distribution in embryos and endosperms of different Ginkgo biloba cultivars. Results showed that room temperature and sand storage promoted embryonic post-maturation of Ginkgo biloba seeds, whereas 4 °C and − 20 °C storage inhibited embryo development. During all storage treatments, the total TMPN mass in the whole kernel and its proportional distribution between embryo and endosperm remained stable, while the content concentrations (µg/g) of MPN, MPNG, and TMPN in the two tissues exhibited dynamic fluctuations driven by the interconversion of MPN and MPNG. Notably, over 93% of TMPN was concentrated in the endosperm across all storage conditions, with only 1.49 ± 0.00 ~ 5.04 ± 0.05%, 0.52 ± 0.02 ~ 6.13 ± 0.08%, 0.2 ± 0.00 ~ 2.01 ± 0.12% and 0.19 ± 0.00 ~ 2.36 ± 0.04% of TMPN detected in the embryo under room temperature storage, sand storage, 4 °C storage, and − 20 °C storage, respectively. This study refutes the long-standing misconception that the embryo is the most toxic part of Ginkgo biloba seeds and that mechanical embryo removal achieves effective detoxification, providing a scientific basis for the precise detoxification of Ginkgo biloba seeds.
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危险品化学品经营许可证（带存储）