CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Sibo Zhao,Hengbin Mao,Weishan Ma,Mingliang Li,Shao Gang,Bingbing Fan,Hailong Wang,Hongliang Xu,Hongxia Lu
All-inorganic halide perovskite nanocrystals (NCs) have attracted much attention in many fields. However, the poor stability of NCs and the toxicity of Pb have greatly hindered their practical applications. Reducing the proportion of Pb with the concept of high-entropy and coating NCs with an outer layer have been regarded as effective strategies to solve the problems. Herein, We have successfully synthesized the all-inorganic high-entropy dual-phase Cs(Pb 1/5 Mn 1/5 Ni 1/5 Zn 1/5 Cd 1/5 )Br 3 /Cs(Pb 1/5 Mn 1/5 Ni 1/5 Zn 1/5 Cd 1/5 ) 2 Br 5 (Cs‘B’Br 3 /Cs‘B’ 2 Br 5 ) perovskite NCs with good luminescence properties by a high-energy ball milling method; On the basis of which, Cs‘B’Br 3 /Cs‘B 2 ’Br 5 NCs are coated with SiO 2 and EVA resin. Due to the amorphous SiO 2 protection, the Cs‘B’Br 3 /Cs‘B 2 ’Br 5 @SiO 2 NCs maintained 93% of their emission intensity after 90 days compared to their uncoated counterparts. The PL intensity of Cs‘B’Br 3 /Cs‘B 2 ’Br 5 NCs /EVA was significantly enhanced by a factor of 4.7 for compared to the uncoated NCs. In addition, the PL emission intensity of the Cs‘B’Br 3 /Cs‘B 2 ’Br 5 NCs /EVA remained 93.7% after 90 days, and the emission peak intensity remained approximately 63% after 8 h of placement in an enclosed environment at 80% humidity through the dense polymer chains and the hydrophobic nature of the film. Finally, the film could expand its application prospects in the field of flexible device.
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ACS Catalysis
·
2025
·
IF 13.1
Xu Li,Guodong Qi,Richard J. Lewis,Mark J. Howard,Barry A. Murrer,Brian Harrison,David J. Morgan,Christopher J. Kiely,Qian He,Thomas E. Davies,David J. Willock,Michael Bowker,Jingxian Cao,Feng Deng,Jun Xu,Graham J. Hutchings
The selective oxidation of methane to form methanol and acetic acid has been studied using AuPd nanoparticles supported on the zeolite H-ZSM-5 in water at 240 °C using molecular oxygen as the terminal oxidant in the absence of any added coreductant. The addition of Pd to Au/ZSM-5 significantly increases the selectivity to acetic acid to levels approaching almost complete selectivity within the oxygenated products. However, we observe that the reaction conditions employed lead to the corrosion of the stainless-steel components of the autoclave reactor and also leaching of iron from the ZSM-5 zeolite, and hence the AuPd nanoparticles, on reaction, become coated or partially coated with an oxidic Fe shell. The presence of the oxidized iron coating hinders nanoparticle agglomeration preventing deactivation of the AuPd/ZSM-5 catalyst but does not adversely affect the observed catalysis.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Baoxia Liu,Haoshuang Shen,Daosheng Liu,Yuanqiang Hao,Xu Zhu,Qi Shen,Peng Qu,Maotian Xu
Metal-organic coordination polymers have emerged as attractive functional materials due to their tunable structures and unique properties. In this work, by the self-assembly of citrate (Cit) and lanthanide ions, we developed lanthanide coordination polymer nanoparticles (LCPNPs), Cit/Tb, for fluorescence sensing of guanosine-5-monophosphate (GMP). The LCPNP-based Cit/Tb sensor alone displayed weak luminescence, however, the addition of GMP to Cit/Tb led to the formation of a ternary LCPNP, Cit/Tb-GMP, with a significantly enhanced luminescence (15-fold) owing to the intramolecular energy transfer from GMP to Cit/Tb and the hydrophobic environment in the polymer interior. This luminescence turn-on assay exhibited excellent selectivity and high sensitivity for GMP with detection limit of 100 nmol L −1 . Furthermore, the Cit/Tb LCPNP possesses a long luminescence lifetime of up to a millisecond, which is important for detecting GMP in complicated samples of infant formula and ham by time-resolved fluorimetry. We believe that the presented Cit-based nanosensor would inspire the development of various new LCPNP-based fluorescent assays by utilizing Cit or other water-soluble, non-toxic organic ligands for a variety of applications in fluorescence sensing, bio-imaging, drug delivery and so on.
研究领域:
化学
·
生物分析
·
材料科学
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Rui Zhang,Shimin Li,Jiale Chen,Jiantao Li,Jian Xiong,Zhihao Yu,Xuebin Lu
A template-assisted approach was employed to synthesize a MOF-on-MOF derived catalyst for the selective oxidation of 5-hydroxymethylfurfural (5-HMF) to produce 2,5-furandicarboxylic acid (FDCA). Characterization revealed that the catalyst forms a cobalt–manganese metal oxide composite phase with a hierarchical porous structure and uniformly distributed Co/Mn active sites. The oxygen vacancies work together with the Lewis acid sites to gradually oxidize the hydroxyl and aldehyde groups in 5-HMF. In the context of reaction conditions that have been identified as optimal (140 °C, 6 h, 50 mg catalyst, 5.88 mol L−1 H2O2), the yield of FDCA was 87.55%, accompanied by 5-HMF conversion rate of 98.66%. The catalyst exhibited exceptional cycling stability, sustaining an FDCA yield exceeding 75% across five cycles. Mechanism studies indicate that the Co–Mn bimetallic synergistic effect optimizes the reaction pathway through electron transfer and oxygen species activation, while the microporous structure prolongs the residence time of intermediates through confinement effect, promoting multi-step oxidation. Compared with the single-metal MOFs derived catalysts, this catalyst has significantly improved adsorption performance and oxidation efficiency, providing an efficient solution for the green synthesis of the bio-based polyester monomer FDCA.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Xingyi Tian,Lan Tang,Hanlin Zeng,Yulu Li,Jingdong Peng,Ming Li,Rongxing He
The electrochemical oxidation of 5-hydroxymethylfurfural (HMFOR) offers a promising route for biomass upgrading. However, its kinetics are severely hindered by the competitive adsorption between key reactive species on catalyst surfaces. Herein, we report a CoO/Ni 3 N-2:3 heterojunction catalyst that enables efficient and selective conversion of HMF to 2,5-furandicarboxylic acid (FDCA). A “bipolar synergistic adsorption effect” is identified at the CoO/Ni 3 N-2:3 interface. This effect is driven by a built-in electric field (BIEF) generated through interface polarization and the work function difference (ΔΦ) between Ni 3 N and CoO. In situ spectroscopic studies and theoretical calculations reveal that the BIEF acts as an electron sorter, directing OH − and HMF to respectively adsorb at oppositely charged regions while strengthening their adsorption. This spatially oriented adsorption effectively lowers the reaction energy barrier and suppresses competitive adsorption of key reactive species, thereby enhancing both activity and selectivity. As a result, the CoO/Ni 3 N-2:3 catalyst initiates HMFOR at a low potential of 1.18 V RHE and achieves complete HMF conversion at 1.408 V RHE with 99.2% FDCA yield and 97.2% Faradaic efficiency. This work provides an innovative strategy for designing high-performance electrocatalysts for biomass valorization.
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POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2026
·
IF 7.3
Renli Ai,Kai Yan,Changyu Shao,Longfeng Wei,Qinqin He,Junxian Chen,Qinyi Hu,Yao Wang,Zhu Li
The exploration of effective biocontrol agents and the characterization of their functional components are crucial for precisely preventing and managing carrot postharvest disease. Herein, Aspergillus niger xj was shown to effectively inhibit the bacterial soft-rot pathogen named Pectobacterium aroidearum , with the functional compounds primarily localized in the extracellular fermentation broth. Correlation analysis between the inhibitory activity and content of 5-hydroxymethyl-2-furancarboxylic acid (HMFCA) across 224 atmospheric and room-temperature plasma mutant strains and original strain xj indicated that HMFCA was an important inhibitory agent. The bioactivity of the bio-derived HMFCA isolated from the positive mutant strain 350–28 was validated through assays. In vitro inhibitory assays revealed that the half-maximal effective concentration (EC 50 ) of HMFCA against P. aroidearum was 1121 ± 8 μg mL −1 , with a minimum inhibitory concentration of 1.25 mg mL −1 and a minimum bactericidal concentration of 2.5 mg mL −1 . Moreover, HMFCA exhibited considerable potential to impede the growth of P. aroidearum . Furthermore, in vivo inhibitory assays indicated that HMFCA could assist carrot in resisting the infection caused by P. aroidearum within 24 h at three concentrations: EC 20 , EC 50 , and EC 80. However, the required effective concentration markedly increased at 48 h. These findings indicated that A. niger exhibited biocontrol activity through the extracellular secretion of active secondary metabolites, which directly suppressed the growth and reproduction of P. aroidearum . In particular, HMFCA was a functional compound, which offered a promising approach for the targeted postharvest management of carrot.
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JOURNAL OF MOLECULAR STRUCTURE
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2026
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IF 4.7
Meiling Nie,Ting Jiao,Lin Wang,Chiyi Wang,Jiahan Jin,Jialu Hu,Yang Li,Hailu Zhang
The study of pharmaceutical cocrystal polymorphism is attracting increasing interest, as variations in intermolecular interactions and packing arrangements between an active pharmaceutical ingredient (API) and the same cocrystal former (CCF) directly impact the extent to which cocrystals can tailor the API’s properties. However, the number of reported cases of cocrystal polymorphism remains relatively limited. Herein, we propose that orientational variability of hydrogen bond donors or acceptors on either the API or the CCF may drive the formation of cocrystal polymorphs. To substantiate this hypothesis, 5-fluorocytosine (5-FC) and L -malic acid ( L -MAL) were selected as the model cocrystallization system, and two distinct 2:1 polymorphs (form Ⅰ and form Ⅱ) were ultimately identified. Crystal structural analysis revealed that the two cocrystals share consistent supramolecular interactions; however, the divergent orientations of carbonyl and hydroxyl groups in L -MAL induce distinguishable hydrogen bonding configurations and molecular stacking patterns, which strongly validates the proposed origin of cocrystal polymorphism. Lattice energy calculations, polymorphic transformation studies, and melting point data collectively confirmed that these two polymorphs exhibit a monotropic thermodynamic relationship, with the high- Z ’ form Ⅱ ( Z ’ = 2) being the thermodynamically stable crystalline phase. Under higher relative humidity condition (90 % RH), an obvious phase transformation of form Ⅰ was observed within one week, whereas form Ⅱ maintains its phase stability for at least four weeks. Such performance difference between these two cocrystals further underscores the practical significance of cocrystal polymorph screening.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Wenting Cai,Shuai Liu,Tongxue Zhang,Ke Fan,Xubin Zhang,Fumin Wang,Jing-Jing Lv,Xijun Liu
The electrooxidation of 5-hydroxymethylfurfural (HMF) into 2,5-furandicarboxylic acid (FDCA) serves as an effective means to substitute the kinetically slow anode oxygen evolution reaction (OER) in water electrolysis for hydrogen generation. Nickel-based materials are promising catalysts, but the weak adsorption ability of the active species NiOOH on HMF leads to slow dehydrogenation kinetics, making the rational design of active Ni sites a huge challenge. Herein, a novel heterojunction catalyst (NiO@Co 3 S 4 /NF) with S vacancies is successfully synthesized by interface engineering. Specifically, the construction of the heterostructure optimizes the electronic structure of Ni, which in turn facilitates the generation of NiOOH and enhances its ability to adsorb substrate molecules. S vacancies are beneficial for exposing more active sites and increasing the active surface area. Density functional theory calculations demonstrate that the interfacial electronic redistribution effectively adjusted the d-band center of Ni, and the strong d-p orbital coupling interaction between Ni and HMF can significantly lower the energy barrier of the dehydrogenation step, thereby promoting the highly selective oxidation of HMF to FDCA. Consequently, the NiO@Co 3 S 4 /NF exhibits outstanding electrocatalytic activity, achieving a current density of 50 mA cm −2 at only 1.30 V vs. RHE, with a FDCA yield of 99.62% and a Faradaic efficiency of 99.67%, along with excellent cycling stability. Our work provides new insights into catalyst regulation for biomass upgrading.
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BIOORGANIC CHEMISTRY
·
2026
·
IF 4.7
Jinnian Wang,Haoming Zhao,Shijun Tong,Xingjian Zhang,Shuyu Ding,Han Zhang,Zhong-Hua Yang
The industrial production of pyridoxal 5′-phosphate (PLP)—an indispensable enzymatic cofactor—is hampered by inefficient multistep chemical syntheses and the economic infeasibility of ATP-dependent biocatalytic routes. To address these challenges, we report an ATP-autonomous biocatalytic cascade that couples pyridoxal kinase (PLK) with polyphosphate kinase (PPK) for sustainable PLP synthesis. This system harnesses inexpensive sodium hexametaphosphate (SHMP) as a phosphoryl donor to drive continuous ATP regeneration, thereby enabling efficient phosphorylation of pyridoxal to PLP without exogenous ATP input. Recombinant PLK and PPK were co-expressed in E. coli BL21(DE3), yielding specific activities of 50 and 145 U/g cell , respectively. The whole-cell biocatalyst achieved only about 25% conversion yield due to mass transfer limitations and intracellular PLP degradation. Notably, while the optimized cell-free system (45 °C, pH 6.5, PLK:PPK = 1:3, 25 mM SHMP) attained a remarkable 95% PLP yield. This 3.8-fold enhancement demonstrates the critical advantage of eliminating cellular barriers in complex multi-enzyme cascades. Our work establishes a robust, ATP-independent platform for high-efficiency PLP biosynthesis that seamlessly integrates cofactor regeneration with cascade catalysis, offering a scalable and economically viable route for industrial biomanufacturing. Moreover, it demonstrates the broader utility of polyphosphate-driven energy recycling in sustainable biocatalysis.
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PubMed
高影响因子
Canadian Journal of Chemistry
·
2022
·Vol. 100
·期 8
·
IF 1.051
Changshuai Liu,Rong Zhang,Rujing Pei,Chao Zhang,Fuxiang Li
A new strategy was implemented to synthesize hierarchical ZSM-5 zeolite, which uses self-made organosilanized double-terminal amino polyetheramine (ODAP) as a soft template to generate mesopores. The influence of the additional amount of ODAP on the textural properties and morphologies of the hierarchical ZSM-5 zeolite was investigated. The obtained hierarchical ZSM-5 zeolite was characterized by X-ray diffraction, N2 physical adsorption, SEM, temperature-programmed desorption of NH3, and other methods. The analysis of the experimental results shows that the maximum total BET specific surface area and mesoporous specific surface area of the optimized hierarchical ZSM-5 zeolite reached 609 and 278 m2/g, respectively. Because the synthesized hierarchical ZSM-5 zeolite has a large mesoporous specific surface area and abundant surface acidity, in terms of reactant conversion and product selectivity, compared with microporous zeolite, it exhibits excellent catalytic performance in the thiophene alkylation desulfurization reaction. This synthesis strategy can be extended to the preparation of zeolites with different framework structures, which is of great significance.
研究领域:
材料科学
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催化化学
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无机化学
·
多孔材料
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SCRIPTA MATERIALIA
·
2013
·Vol. 69
·期 8
·574-577
·
IF 2.821
Limeng Liu,Lianbing Zhong,Baoyou Zhang,Zhonghong Lai,Feng Ye,Zhiguo Zhang,Yu Zhou
The effects of the addition of 5 mol.% aluminum , copper, silver or gold on the densification , microstructures, mechanical properties and oxidation resistance in thin air of TaC ceramics were investigated. Full density and relatively high flexural strength (up to 738 MPa) were observed in the case of the Au addition after spark plasma sintering at 1700 °C for 5 min under 30 MPa pressure. Due to wetting of the TaC grains by a thin metallic film , the consolidated materials showed enhanced oxidation resistance against thin air.
研究领域:
材料科学
·
陶瓷
·
冶金学
·
高温材料
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JOURNAL OF ELECTRONIC MATERIALS
·
2019
·Vol. 48
·期 11
·7068-7075
·
IF 1.676
Li Shuhui,Zhou Ying,Cui Lijun,Ge Zhenhua,Feng Jing
In 2 O 3 (ZnO) k superlattice ceramics are promising oxide thermoelectric materials, as superlattice interfaces are effective in scattering phonons and filtering low-energy electrons to decrease thermal conductivity and improve the figure of merit ( ZT ) value. In this work, homologous compounds were prepared by solid-state reaction method using ZnO and In 2 O 3 as raw materials. Phase purity and crystal structure were characterized by x-ray diffraction, revealing that In 2 O 3 (ZnO) k crystallizes in an R3 m space group for odd k values and P6 3 /mmc for even k values. The study of thermoelectric (TE) properties showed that as k increased, the thickness of InO(ZnO)
+ 3
also increased, while the electrical conductivity, thermal conductivity, Seebeck coefficient, power factor and ZT value were all decreased. In 2 O 3 (ZnO) 3 samples obtained a maximum power factor of 651 μ W m −1 K −2 at 973 K, and also achieved a maximum ZT value of 0.24 at 973 K.
研究领域:
材料科学
·
凝聚态物理
·
能源转换技术
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危险品化学品经营许可证（带存储）