Journal of Materials Chemistry A
·
2025
·
IF 9.5
Qing Cheng,Yuqi Zhang,Yingying Cao,Peihao Dou,Long Liu,Yanqiang Zhang
Ionic liquid-H2O2 is a green hypergolic propellant system, and the poor self-ignition hinders its application. Herein, the stable zero-valent catalyst Cu nano-particle with twin boundaries (T-Cu) was synthesized. As the twin boundary regulates the electron micro-environment of the T-Cu surface, the electron transfer from the d electrons of Cu atom to the σ* anti-bonding orbital of H2O2 is intensified to create ·OH and ·OOH. The resulted free radicals possess strong oxidizing ability, and react violently with [BMIM]N(CN)2 to achieve a rapid ignition with the delay time as low as 25 ms. This work provides an effective way to get excellent ignition performance, and promotes the application of Ionic liquid-H2O2 green hypergolic propellants.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 21
·10347-10356
·
IF 3.925
Zegang Qiu,Xiaoxia He,Shaobo Ma,Zhiqin Li,Yu Xiong,Yueling Cao
The selective hydrogenation of oxygen containing functional groups is of great importance for the high value utilization of biomass resources such as lignin. However, it remains a great challenge to design and synthesize non-noble metal catalysts with high efficiency for the hydrogenation of lignin derivatives under mild reaction conditions. Here, a promising non-noble Ni@CN (CN: nitrogen doped carbon) catalyst was fabricated by direct pyrolysis of Ni metal–organic frameworks (Ni–ZIF). Characterization results reveal that the Ni nanoparticles (NPs) are embedded in nitrogen doped carbon, and the size of Ni NPs increases with the rising pyrolysis temperature. The severe aggregation of the particles of the Ni@CN composite occurs when the pyrolysis temperature is higher than 525 °C. The as-prepared Ni@CN catalysts were tested for selective hydrogenation of the aldehyde group of vanillin (lignin monomer molecule) for the purpose of producing vanillyl alcohol. The Ni@CN-425 catalyst obtained at a pyrolysis temperature of 425 °C exhibits the highest catalytic performance for the selective hydrogenation of vanillin to vanillyl alcohol. A vanillin conversion of 99.5% and vanillyl alcohol selectivity of 98.3% are achieved under a low temperature of 80 °C. In addition, Ni@CN-425 presents excellent stability in the hydrogenation reaction of vanillin. This work provides some useful insights into the design of novel non-noble metal catalysts with high efficiency for selective hydrogenation of oxygen containing functional groups in lignin derivatives.
研究领域:
催化化学
·
材料科学
·
生物质转化
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ACS Applied Polymer Materials
·
2022
·
IF 4.855
Yuxia Ren,Min Li,Haiyuan Ye,Zhengqiang Xia,Qi Yang,Gang Xie,Sanping Chen,Shengli Gao,Jack Y. Lu
Energetic coordination polymers (ECPs) have good application prospects as combustion promoters of solid propellants. In this work, based on a rigid proton-free nitrogen-rich ligand 1,3,5-tri(1H-1,2,4-triazol-1-yl)benzene (TTB) and an environmentally friendly copper ion, two ECPs, {[Cu6(TTB)2(CN)6]·CH3CN}n (1) and {[Cu(TTB)(NO3)2]·CH3CN}n (2), were prepared by the solvothermal method using an anion regulation strategy. X-ray crystallographic analyses, thermal stability, kinetic parameters of exothermic decomposition process, thermal safety performances, mechanical sensitivity, and theoretical detonation characteristics of two ECPs were, respectively, explored. Meanwhile, their promoting effects on the combustion decomposition of ammonium perchlorate were investigated by differential scanning calorimetry tests, thermal decomposition kinetics, and surface morphology analyses. Experimental results indicated that ECP 2 has good application potential in the solid propellant field.
研究领域:
材料科学
·
化学工程
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DYES AND PIGMENTS
·
2021
·
IF 4.889
Bin Zuo,Lian Liu,Xicheng Feng,Denghui Li,Wanfang Li,Mingxian Huang,Qinyue Deng
In this study, a novel fluorescent sensor 1 built on triphenylamine was designed for the extremely sensitive detection of trace cyanide anions. The UV absorbance and fluorescence emission intensity of sensor 1 with aggregation-induced emission (AIE) properties vary with water fraction ( f w ). In the 1% DMSO aqueous solution, sensor 1 exhibits the optimal aggregation state and fluorescence intensity , and has high selectivity and sensitivity for cyanide ions (CN − ). From formula 3δ/S, it is clear that sensor 1 has an extremely low limit of detection (LOD) for CN − (LOD = 2.95 × 10 −8 mol/L). Excellent anti-interference performance and broad pH response scope (1.0–9.0) are also advantages of sensor 1. Fluorescence spectroscopy , 1 H NMR, 13 C NMR spectroscopy, HRMS, Job's plot analysis and density functional theory calculations have been employed to elucidate the sensing mechanism between TPEB and CN − . Through colorimetry and fluorescence approach, the sensor 1 test strip can easily detect CN − . Therefore, the novel sensor 1 provides a broad application prospect for detecting toxic environmental pollutants.
研究领域:
分析化学
·
环境科学
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LANGMUIR
·
2026
·
IF 4.4
Xinru Nie,Qinghai Cai,Yajing Wang
Designing advanced cobalt-based catalysts capable of selectively generating singlet oxygen (1O2) is crucial for suppressing interference from coexisting reactive oxygen species in peroxymonosulfate (PMS) activation and achieving efficient degradation of organic pollutants. In this work, an interface engineering strategy was employed to fabricate Co-CoO-Co3O4/CN featuring abundant oxygen vacancies and Co active sites. The constructed Co-CoO-Co3O4/CN + PMS system achieves nearly complete degradation of 50 mg·L–1 RhB within 20 min, and its catalytic activity outperforms most reported cobalt-based catalysts, with a specific rate constant value as high as 11.23 L2·min–1·g–2. In addition, the Co-CoO-Co3O4/CN + PMS system exhibits excellent broad-spectrum applicability, outstanding environmental tolerance, and stability. It enables continuous treatment of 49.8 L of RhB solution, with the degradation efficiency consistently maintained above 99%. Systematic investigations demonstrate that Co-CoO-Co3O4/CN exhibits a strong interaction with PMS, and this enhanced interaction can drive the efficient conversion of PMS into superoxide anion radicals (O2•–), which are further transformed into 1O2. This work provides new insights into the rational design of high-performance cobalt-based catalysts, and paves the way for efficient PMS activation and selective 1O2 generation.
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Journal of Physical Chemistry C
·
2026
·
IF 3.4
Jingyi Zhang,Jiaming Wu,Yuren Zhao,Keyan Li,Xinwen Guo
Photocatalytic conversion of CO2 and H2O into syngas offers a green and sustainable pathway for the production of chemical feedstocks. However, most high-yield syngas production systems rely on a noble metal photosensitizer or cocatalyst, making it challenging to obtain cost-effective syngas. In this work, we designed and prepared S-scheme TiO2/CN heterojunctions with varying mass ratios by calcining the mixture of NH2-MIL-125(Ti) and pristine carbon nitride (CN). The combination of TiO2 with CN significantly enhances visible light absorption, and the formation of an S-scheme heterojunction effectively improves the separation and migration of photogenerated carriers. In addition, the enlarged specific surface area as well as the enhanced CO2 adsorption capacity also promote the photocatalytic CO2 reduction. Without any noble metal photosensitizer or cocatalyst, the 150TiO2/CN heterojunction demonstrated excellent performance to produce syngas. The production rates of CO and H2 are 6.2 and 1.9 mmol g–1 h–1, respectively, and the syngas production rate was 3.4 and 29.5 times that of pure CN and TiO2, respectively, when high-purity CO2 is used as the feed gas and the ratio of H2O/MeCN in solvent is 1:4. By adjustment of the composition of feed gas and solvent, high yield syngas with widely tunable CO/H2 ratios from 3.3:1 to 1:3.7 was achieved, and the maximum syngas production rate reached 12.1 mmol g–1 h–1. This work provides insights into the design of highly efficient photocatalysts for CO2 conversion to fuels or chemicals.
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ADVANCED SYNTHESIS & CATALYSIS
·
2026
·Vol. 368
·期 9
·e70446
·
IF 3.7
Dingbin Zhu,Yue Wang,Fuxiu Cao,Wanjun Xu,Wenlong Jia,Huai Liu,Rui Zhang,Lincai Peng,Tianping Lv,Tianwei He,Junhua Zhang
The photocatalytic conversion of biomass-derived monosaccharides to lactic acid (LA) provides a sustainable approach for the high-value utilization of biomass. However, conventional photocatalysts suffer from insufficient visible light absorption, rapid recombination of photogenerated charge carriers, and inadequate surface active sites, which severely hinder the generation of key active species, thereby limiting the catalytic activity and LA selectivity. Herein, this study constructs a Z-scheme heterojunction photocatalyst TiO 2 /C-CN by combining carbon skeleton and oxygen vacancy (V O )–modified TiO 2 with graphitic carbon nitride (CN), with excellent photocatalytic performance. Under visible light irradiation, it achieves 92.3% LA yield and 96.4% selectivity within 60 min. The carbon skeleton effectively enhances visible light absorption and electron transport, V O provides abundant active sites for the adsorption and activation of oxygen, and the construction of the Z-scheme heterojunction achieves efficient charge separation while retaining strong redox capability. The synergistic effect of these three components facilitates the efficient generation of superoxide radicals ( ), which selectively cleave the C3 C4 bond of glucose intermediates, directing the reaction toward LA formation. This study provides a rational strategy to design efficient and precise photocatalysts for biomass valorization through the synergistic regulation of electron transport channels, defect sites, and heterojunction engineering.
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JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Yiran Hu,Chunmei Wang,Xiaomin Dou,Jun Liu
A Co 3 O 4 /g-C 3 N 4 p-n heterojunction photocatalyst was fabricated by coupling ZIF-67-derived 3D porous Co/Co 3 O 4 /CN (N-doped carbon) composites with crystalline g-C 3 N 4 nanosheets for activating peroxymonosulfate (PMS) towards tylosin (TYL) degradation. The catalyst was synthesized via a carbonization-oxidation strategy, which retained the dodecahedral framework of ZIF-67 and simultaneously formed intimate interfacial contact with g-C 3 N 4 , thereby facilitating efficient interfacial charge transfer. The constructed p-n heterojunction generated an internal electric field that promoted migration of photogenerated electrons and holes and suppressed charge recombination, thereby improving photocatalytic performance. Moreover, the localized surface plasmon resonance (LSPR) effect of metallic Co induced the generation of energetic hot electrons and hot holes under visible light, accelerating PMS activation and enhancing the Co(II)/Co(III) redox cycle. The synergistic interaction between photogenerated charge carriers and LSPR-induced hot carriers significantly promoted PMS activation, driving the generation of primary reactive oxygen species (·O 2 - and 1 O 2 ) and achieving 95.4% TYL degradation within 16 min. Toxicity and molecular docking analyses confirmed reduced antibacterial activity of degradation products. This study highlights the dual contributions of heterojunction-driven charge separation and LSPR-induced generation of hot carrier with subsequent interfacial transfer in achieving efficient, sustainable antibiotic degradation.
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JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Y.L. Zhao,G.G. Li,H.M. Hou,J.C. Shi,S.N. Luo
We investigate atomic and molecular emission of laser-ablated nitromethane in an Ar or N 2 buffer gas, with fs laser-induced breakdown spectroscopy. The electronic bands of CN, C 2 , and NH molecules and the atomic transition lines of C I, N I, and H α are identified. The time series of the emissions are obtained, and the formation mechanisms of CN and C 2 are deduced. The CN violet system, the B 2 Σ + -X 2 Σ + (0-0) band, is chosen to extract plasma temperature from the experimental spectra.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2023
·
IF 6.1
Yu Wang,Yao Yu,Yi-Ping Hou,Xue-Wei Mao,Zong-Liang Liu,Jian Cui,Bi Wang,Shu Xu,Yi-Yun Qian,Yan-Qin Jiang,Min Wei,Ping-Ping Song
Botrytis cinerea causes gray mold in many fruit and vegetable crops. We previously found that Seselin (SL) displayed antifungal activity against B. cinerea (EC50 = 6.1 μg·mL–1), and this study investigated the effects of Ca2+ and the Ca2+/CN signaling pathway on its antifungal activity against B. cinerea. The results indicated that exogenous Ca2+, Cyclosporine A, and Verapamil reduced the sensitivity of SL against B. cinerea; SL significantly reduced the intracellular Ca2+ concentration in the hyphae; the sensitivity of strains ΔbcCCH1 and ΔbcMID1 to SL were significantly increased; and the expressions of CCH1, MID1, CNA, PMC1, and PMR1 genes of the Ca2+/CN signaling pathway were significantly downregulated by SL treatment. Hence, SL is a potential compound for developing fungicides against B. cinerea. SL dramatically reduces intracellular Ca2+ concentration and disturbs Ca2+ homeostasis, leading to cell death. The Ca2+/CN signaling pathway plays an important role in the antifungal activity of SL against B. cinerea.
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Analytical Methods
·
2019
·Vol. 11
·期 22
·2868-2874
·
IF 2.378
Lifei Ji,Xian Zhou,Jian Zhang,Xin Zhang,Weidong Kang,Fengchun Yang
Organic dye detection requires high sensitivity, low-cost equipment, simplified procedures, and real-time capabilities; thus, electrochemical methods are gradually emerging in this field instead of chromatography. However, much attention has been paid to toxic and complex metal or noble-metal hybrid materials for constructing electrochemical sensors, which is extremely limiting for practical applications. In this study, a metal-free electrocatalyst, MWNTs with carboxylic groups (MWNTs–COOH), was prepared through surface oxidation in a piranha solution and a simple hydrothermal treatment. The obtained MWNTs–COOH possessed superior hydrophilicity, increased conductivity and substantial active carbon or carboxylic group sites, as determined by characterization using Raman spectroscopy, contact angle measurements, electrochemical surface area analysis, and X-ray photoelectron spectroscopy. The above advantages enabled MWNTs–COOH to exhibit excellent electrochemical activities, with a satisfactory utilization for determining trace Rhodamine B (RhB), showing a lower calculated detection limitation of 2.66 nM and a wider linear range from 0.05 to 850 μM with outstanding specificity and reproducibility. Furthermore, it was found that the carboxyl group on the MWNTs would probably have triggered the electron redistribution and exposed more adjacent active carbon sites, which facilitate the electrocatalytic function to CN on the RhB directly.
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INTERNATIONAL BIODETERIORATION & BIODEGRADATION
·
2017
·
IF 2.962
Weiwei Chen,Junde Li,Xiangnan Sun,Jun Min,Xiaoke Hu
A bacterial strain , CN-3, was isolated from petroleum-contaminated sediment in Bohai Bay, China. Morphological, physiological and phylogenetic analyses indicated that the strain belonged to the genus Dietzia . It was capable of utilizing a wide range of alkanes (C 14 –C 31 ), aromatic compounds and crude oil as the sole carbon and energy sources. The bacterium showed high degradation rate (>80%) of the saturated hydrocarbons of crude oil in the pH range of 6–9. The degradation rate was hardly affected at a NaCl concentration up to 85 g L −1 , indicating that the strain can tolerate high salinities . The real-time quantitative Polymerase Chain Reaction (PCR) results showed that the CYP153 genes could be significantly induced by C 14 , C 15 , C 16 , C 26 and pristane, whereas the transcription level of alk B gene was increased moderately with C 14 , C 15 , C 16 , C 26 and pristane induction condition. A high degradation extent, wide substrate range and facile conditions enhanced the potential for this bacterial strain to be used in the bioremediation of crude oil pollution.
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危险品化学品经营许可证（带存储）