CHEMICAL ENGINEERING JOURNAL
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2026
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IF 13.2
Xinglin Wen,Ye Zhu,Yong Pan,Yonglu Yang,Xiaoyue Wan,Ahmed Mebarki,Juncheng Jiang
The direct hydrogenation of 2,4-dinitrotoluene (2,4-DNT) to 1-methyl-2,4-cyclohexanediamine (2,4-MCHD) represents a significant yet non-industrialized green process for synthesizing methylcyclohexane diisocyanate (HTDI), known for its excellent properties. This process faces considerable challenges due to the hydrogenation of the benzene ring, the reduction of two nitro groups, and the need to avoid deamination reactions. In this study, an alkali-free heterogeneous catalytic system was developed for the direct hydrogenation of 2,4-DNT to 2,4-MCHD using Ru nanoclusters supported on γ-Al 2 O 3 . Side reactions such as deamination were effectively inhibited, resulting in a 2,4-MCHD selectivity exceeding 95% and a 2,4-DNT conversion greater than 99%. Kinetic studies indicated that the hydrogenation of 2,4-DNT in this system operates as a tandem reaction, with the hydrogenation of the benzene ring serving as the rate-determining step. Structure-activity relationship studies demonstrated that the valence state of Ru nanoclusters, the acidity and basicity of the catalyst, and the synergistic effect between Ru and the support significantly influence catalytic performance. This work represents the first example of the direct hydrogenation of dinitroaromatic compounds to aliphatic diamines in a system that does not require the addition of alkali elements, thereby establishing a solid foundation for the further exploration of such reaction systems.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2026
·Vol. 37
·期 6
·460
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IF 3.2
Li Caixia,Ji Nan,Li Chenglong,Li Tianqi,Lu Peng,Ren Shuang,Ma Xiaoxuan
BiFeO 3 -BaTiO 3 (BF-BT) ceramics have emerged as a prominent research focus in the lead-free materials field in recent years due to their high Curie temperature and excellent ferroelectric and piezoelectric properties. In this work, 0.68BiFeO 3 -0.32BaTi 1- x (Fe 0.5 Nb 0.5 ) x O 3 + 0.1 wt.% MnO 2 ceramics (abbreviated as 0.68BF-0.32BT(FN) x -Mn, x = 0, 0.01, 0.02, 0.03, 0.04) were prepared by the conventional solid-state reaction method. The effects of Ti-site (Fe 0.5 Nb 0.5 ) 4+ substitution on the crystal structure, microstructure, dielectric, ferroelectric, and piezoelectric properties of 0.68BF-0.32BT ceramics were systematically investigated. It is confirmed from the XRD results that all the compositions consist of diphasic tetragonal (T) and rhombohedral (R) phases. Increase of B-site (Fe 0.5 Nb 0.5 ) 4+ substitution induces an expansion of unit cell volume, reduces the ferroelectric–paraelectric phase transition temperature ( T m ) monotonically from 471 °C at x = 0 to 445 °C at x = 0.04. The average grain size and piezoelectric properties increase by the substitution 2.0 mol% (Fe 0.5 Nb 0.5 ) 4+ complex cations for Ti 4+ in 0.68BF-0.32BT ceramics. Notably, the piezoelectric properties of this ceramic are improved through the grain size effect. Specifically, the 0.68BF-0.32BT(FN) 0.02 -Mn ceramics display optimal comprehensive electrical performance with T m = 461 °C, P max = 26.4 µC/cm 2 , P r = 18.1 µC/cm 2 , E C = 23.0 kV/cm, d 33 = 151 pC/N, k p = 0.298, Q m = 50.32, demonstrating the potential viability of BF-BT ceramics for high-temperature lead-free piezoelectric applications.
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Catalysts
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2026
·Vol. 16
·期 5
·445
·
IF 4.5
Sihui Song,Chunting Li,Sadaf Mutahir,Muhammad Asim Khan,Feng Yan
The catalytic reduction of toxic 4-Nitrophenol (4-NP) to valuable 4-aminophenol is highly important for environmental remediation. However, developing catalysts with high activity, good recyclability, and facile preparation remains challenging. Herein, Ag@Fe3O4nanocomposites were controllably synthesized with a facile one-pot polyol method. By varying the Ag:Fe precursor ratio, the structure could be tuned from dense and porous core-shell to Janus architectures. The porous Ag@Fe3O4nanoreactors (Ag:Fe-0.4) exhibited exceptional catalytic performance, achieving complete 4-NP reduction within 75 s, with an apparent rate constant (k) of 6.29 × 10−2s−1, a normalized rate constant (kn) of 3742 s−1mmol−1, and a TOF value of 1042 h−1. XPS results verified that the excellent activity originated from the porous structure and interfacial charge transfer from Ag to Fe3O4. The catalysts showed super-paramagnetism and could be reused for at least eight cycles with >95% conversion retained. It also displayed high efficiency in reducing diverse nitroaromatics and in natural water. This work highlights the significance of structural and electronic modulation, providing a scalable strategy for magnetically recyclable catalysts toward environmental remediation and heterogeneous catalysis.
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LANGMUIR
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2026
·
IF 4.4
Xin Wang,Wei-Qian Tang,Xinyu Zhao,Shuo Dong,Yu-Hui Luo,Qing-Hua Wang
This study successfully constructed a direct Z-scheme TP-WO3 heterojunction photocatalytic system via an in situ compositing strategy for the photoassisted Fenton degradation of tetracycline hydrochloride in aqueous environments. The composite formed an intimate interfacial contact between TP and WO3, effectively facilitating the separation and migration of photogenerated charge carriers. Experiments demonstrated that TP-WO3(0.7) achieved a degradation efficiency of 92.34% for 10 ppm tetracycline within 75 min under visible light irradiation with H2O2 assistance, with a reaction rate constant (2.731 × 10–2 min–1) significantly higher than those of the individual components. Radical trapping experiments and electron paramagnetic resonance (EPR) analysis confirmed that h+, •OH, and •O2– were the main active species. This study provides a feasible design strategy and experimental basis for developing efficient and stable organic–inorganic Z-scheme heterojunction photocatalytic materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Bingbing Liu,Jin Wu,Li Tang,Ping Chen,Haiyu Li,Fengyuan Zhang,Yanfang Wang,Yunshuang He,Zili Lin,Wenying Lv,Guoguang Liu
Interfacial regulation of molecular oxygen activation is critical for controlling reactive oxygen species generation in photocatalytic systems. Here, a copper 4-cyanophenylacetylide/copper phenylacetylide heterointerface (CN-PhC 2 Cu/PhC 2 Cu) was constructed through a one-step in situ strategy to regulate interfacial charge transfer and excited-state processes. Cyano functionalization created an electronic difference between the two copper acetylide components, while their related C C Cu coordination frameworks favored intimate interfacial coupling. The optimized 75CNPC removed 95.2 ± 3.9% of diclofenac within 60 min under 455 nm visible-light irradiation and retained appreciable activity in the presence of common water constituents and in different aqueous matrices. Optical, electrochemical, and theoretical analyses indicate that interfacial coupling modulates the local electronic structure, facilitates charge separation, and strengthens O 2 adsorption. Reactive oxygen species (ROS) measurements further reveal a redistribution of O 2 activation channels: electron transfer contributes to · O 2 − formation, whereas interface-regulated excited-state processes favor triplet-mediated energy transfer and enhanced 1 O 2 generation. Liquid chromatography-mass spectrometry (LC-MS) analysis and toxicity evaluation suggest that DCF undergoes initial activation, structural fragmentation, and progressive oxidation, with several identified transformation products exhibiting reduced predicted toxicity relative to the parent compound. These results demonstrate how the CN-PhC 2 Cu/PhC 2 Cu coordinates charge transfer, excited-state evolution, and molecular oxygen activation in organometallic photocatalysts. Download: Download high-res image (339KB) Download: Download full-size image
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xinshuang Gao,Miaoxia Gong,Hanbo Li,Jia-Jia Zheng,Xiaochun Wu
Capitalizing on the spatiotemporal controllability of localized plasmons, plasmonic nanostructures show great promise in photocatalysis. Herein, using plasmon-mediated azo-dimerization of 4-aminothiophenol (4-ATP) on helical plasmonic nanorods (HPNRs), we demonstrate a unique route to modulate catalytic activity. This approach leverages plasmon-mediated activation of adsorbed oxygen species (one reactant) to control the delivery of free 4-ATP (the other reactant) in the liquid phase to reactive sites, thereby significantly enhancing the formation of azo-coupling product 4,4′-dimercaptoazobenzene (DMAB). Upon plasmon excitation, adsorbed oxygen species on the HPNR surface capture hot electrons and become activated. These photoactivated oxygen species facilitate the transport of free 4-ATP molecules, shuttled outside the surface-stabilizing ligand shell of the HPNR, to surface-active sites and participate in the coupling reaction. Considering tunability of local plasmons, surface ligand design (e.g., bromide ions scavenging holes), and plasmonic nanostructure morphology, this strategy, regulating one reactant’s activation to control another’s, offers distinct advantages for on-demand and site-specific reactions with high selectivity. Our findings highlight a versatile means of modulating reaction activity with potential applications in spatially and temporally controlled catalysis.
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POLYMER
·
2025
·
IF 4.5
Guangshui Tu,Chong Wang,Shengyou Chen,Qian Wang,Zhenxue Liu,Haotian Zhou,Chunyu Feng,Handou Zheng,Haiyang Gao
Heterogeneous catalysts have long dominated polyolefin production, the immobilization of a pyridylamido hafnium catalyst is highly challenging because of its unique in-situ ligand modification mechanism. Here, we report a heterogeneous pyridylamido hafnium catalyst immobilized on a dual MgCl 2 /Al i Bu n (2-ethyl-1-hexoxide) 3-n activator/support for slurry homo- and copolymerization of 4-methyl-1-pentene (4MP). The supported pyridylamido hafnium catalyst shows enhanced catalytic activity and excellent polymer morphology control toward homopolymerization of 4-methyl-1-pentene. The produced poly(4-methyl-1-pentene)s show high isotacticity (>99%) and high melting temperatures up to 230 °C, and have normal molecular weight distribution. The heterogeneous catalyst still remains the advantages of enhanced catalytic activity and excellent polymer morphology control during the copolymerization of 4MP and α-olefins. Both the incorporation of α-olefin and longer chain α-olefins can improve the resilience of PMP materials.
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JOURNAL OF POWER SOURCES
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2016
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IF 6.333
Yanchun Yang,Xiaojiao Kang,Lijian Huang,Song Wei,Daocheng Pan
Earth abundant Cu 2 ZnSn(S,Se) 4 (CZTSSe) has been considered as one of the most promising thin film solar cell absorber candidates. Here, we develop a facile water-based precursor solution approach for depositing high-efficiency Cu 2 ZnSn(S,Se) 4 thin film solar cells. In this environmentally friendly approach, inexpensive elemental Cu, Zn, Sn and S powders are used as the starting materials and are dissolved in the aqueous solution of thioglycolic acid and methylamine, forming a homogeneous precursor solution for depositing Cu 2 ZnSnS 4 nanocrystal thin film . As-deposited CZTS nanocrystal thin films are selenized to form the large-grain CZTSSe absorber layers . It was found that Na doping plays an important role in the formation of the extremely dense and flat CZTSSe absorber layer, and fill factor can be significantly improved for Na-doped CZTSSe solar cells, which lead to a photoelectric conversion efficiency of 6.96% with an open-circuit voltage of 378 mV, a short current density of 28.17 mA cm −2 , and a fill factor of 65.4%.
研究领域:
材料科学
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新能源材料
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半导体薄膜
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光伏技术
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无机功能材料
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INTERNATIONAL DAIRY JOURNAL
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2026
·
IF 3.1
Mengyuan Cao,Min Li,Yizhuo Yan,Yifan Wu,Li Su,Jinghan Dai,Cong Wang,Xin Lv,Yan Zhang,Wupeng Ge,Baowei Yang
Goat milk is nutritionally valuable and ranks as the second most consumed dairy in China, with Shaanxi Province being the national leader. However, systematic studies on regional quality variations, grading and spoilage mechanisms of it remain limited. In this study, 124 raw milk samples were collected from 14 major dairy goat breeding areas across Shaanxi. Our results revealed that significant spatiotemporal variations, and long-distance transportation affected milk quality by increasing microbial loads and reducing fat content ( P < 0.05). The grading model demonstrated high accuracy (91.8%) and reliability (AUC = 98.4%), with fat content being the most critical biomarker. Storage at 10 °C accelerated spoilage compared to 4 °C, with marked enrichment of Pseudomonas and Enterobacteriaceae . Multi-omics analysis identified seven genus-level microbial biomarkers and five key metabolites, which are linked to goat milk spoilage. This study provides a data-driven tool for raw goat milk quality assessment and grading, reveals core microbiological and metabolic mechanisms, and offers crucial insights for quality control in the dairy industry.
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BIOMATERIALS
·
2023
·
IF 14
Hong-Lin Qian,Sheng-Yu Chen,Fan Jia,Wei-Pin Huang,Jing Wang,Ke-Feng Ren,Guo-Sheng Fu,Jian Ji
The valid management of inflammation and precise inhibition of smooth muscle cells (SMCs) is regarded as a promising strategy for regulating vascular responses after stent implantation , yet posing huge challenges to current coating constructions. Herein, we proposed a spongy cardiovascular stent for the protective delivery of 4-octyl itaconate (OI) based on a “spongy skin” approach, and revealed the dual-regulation effects of OI for improving vascular remolding. We first constructed a “spongy skin” onto poly-l-lactic acid (PLLA) substrates, and realized the protective loading of OI with the highest dosage of 47.9 μg/cm 2 . Then, we verified the remarkable inflammation mediation of OI, and surprisingly revealed that the OI incorporation specifically inhibited SMC proliferation and phenotype switching, which contributed to the competitive growth of endothelial cells (EC/SMC ratio ∼ 5.1). We further demonstrated that OI at a concentration of 25 μg/mL showed significant suppression of the TGF-β/Smad pathway of SMCs, leading to the promotion of contractile phenotype and reduction of extracellular matrix. In vivo evaluation indicated that the successful delivery of OI fulfilled the inflammation regulation and SMCs inhibition, therefore suppressing the in-stent restenosis. This “spongy skin” based OI eluting system may serve as a new strategy for improving vascular remolding, and provides a potential concept for the treatment of cardiovascular diseases.
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INORGANICA CHIMICA ACTA
·
2023
·
IF 2.8
Xiaoyan Zhao,Shirong Kang,Hao Zhang,Hua Yang,Mingyu Dou,Haitao Zhao,Dacheng Li,Jianmin Dou
Photocatalytic water splitting to produce H 2 is a promising method to directly convert solar energy into chemical energy, which is a superb solution to the human energy shortage. This work constructed an efficient photocatalyst using Cd 0.5 Zn 0.5 S NPs (CZS) as the photosensitizer, water-soluble binuclear cobalt bis(4-methothiocarbazide) complex as the molecular co-catalyst. The complex could effectively transport photogenerated electrons on CZS, thus inhibiting charge recombination and significantly improving the activity and stability of the present photocatalytic system. Under optimal conditions, the experimental results showed that the highest turnover number (TON) of H 2 production was 5699 after the reaction of the photocatalytic system with visible light (λ > 420 nm) for 24 h. The average H 2 evolution rate of 1221 μmol∙h −1 was 6.4 times higher than that of pure CZS. The highest apparent quantum yield (AQY) at 420 nm was ∼26%.
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PROCESS BIOCHEMISTRY
·
2023
·
IF 4.4
Haidong Teng,Kaitong Chen,Lan Wang,Jianping Wu,Gang Xu
l -syn-3-[4-(methylsulfonyl)] phenylserine is a key industrial intermediate for the synthesis of florfenicol, thiamphenicol , and other products. l -Threonine aldolase can synthesize l -syn-3-[4-(methylsulfonyl)] phenylserine from glycine and 4-methylsulphonyl benzaldehyde directly. However, the selectivity of free l -threonine aldolase was difficult to meet the requirement of industrialization. Here, we selected the suitable site to insert His tag as immobilized site to improve the selectivity of l -threonine aldolase based on the molecular dynamics simulation and prior protein engineering. The phenanthroline was coupled to the surface of magnetic nanoparticles coated with silicon and thus enabled the selective and oriented immobilization of His-tagged l -threonine aldolase. Due to magnetic nanoparticles coated with silicon as supports, it was easy to separate the residual reactant and impurities from the immobilized enzyme by magnetic attraction. Moreover, the immobilization was combined with the purification of free enzymes through directional immobilization, which avoided heterozyme linking supports and improved the utilization efficiency of supports. Our study demonstrates an effective approach: how to analyze and select enzyme-targeted ligation sites in conjunction with previous modifications of engineered bacteria, and the immobilized enzyme obtained also provided a good candidate for the industrial production of l -syn-3-[4-(methylsulfonyl)] phenylserine.
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