FOOD CHEMISTRY
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2026
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IF 10.4
Nguyen Ngoc Huyen,Ngo Xuan Dinh,Vu Thi Huong Mai,Phung Thi Lan Huong,Nguyen Duc Toan,Nguyen Anh Son,De Pham-Cong,Van Tan Tran,Hoang Van Tuan,Nguyen Quang Hoa,Pham Duc Thang,Anh-Tuan Le
This study reports the carbendazim (CBZ) detecting capability of spinel cobaltite MnCo 2 O 4 (MCO) synthesized via a microwave-assisted hydrothermal approach. The MCO-modified screen-printed electrode (MCO/SPE) exhibited excellent electrocatalytic activity toward CBZ oxidation. As a result, the proposed sensor enables sensitive CBZ detection over two distinct linear ranges (0.05–5 μM and 25–500 μM), with a low detection limit of 0.02 μM and a high sensitivity of 6.46 μA μM −1 cm −2 . The enhanced sensing performance is attributed to the synergistic redox activity of Co 2+ /Co 3+ and Mn 2+ /Mn 3+ couples, which enhance both electrical conductivity and catalytic activity, together with the nanorod morphology that promotes efficient diffusion of CBZ molecules and electrolyte species. The applicability of the MCO/SPE was further validated through effective CBZ detection in fruit and vegetable samples as compared with the liquid chromatography–tandem mass spectrometry (LC-MS/MS) method, showing strong potential for food safety monitoring.
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PubMed
高影响因子
Separations
·
2026
·Vol. 13
·期 6
·163
·
IF 3.5
Jingyi Wang,Yu Zhang,Lingen Zhang
Spent lithium-ion battery electrolytes contain fluorine-, sulfur-, and phosphorus-bearing toxins, necessitating deep detoxification and directional conversion into C1–C6light hydrocarbons. To elucidate the specific catalytic roles and sequential activation of cathode metals (Li, Ni, Co, Mn), this work systematically deconvolutes their mono- and multi-metallic migration mechanisms over a CaO-ZSM-5* catalyst during vacuum catalytic pyrolysis (530 °C, 100 Pa). Results reveal that Li+and Ni2+dominate C–O bond cleavage in carbonates and CaO-ZSM-5*-assisted decarboxylation and oxygen fixation, significantly increasing the relative hydrocarbon content. Conversely, Co2/3+and Mn4+release reactive oxygen species, causing deep oxidation of hydrocarbons into CO2and antagonizing the targeted conversion. In multi-metallic systems, forming composite metal oxides (MxNyOz) increases the energy barrier for releasing active catalytic ions, hindering carbonate cleavage and leaving unreacted carbonate feedstocks. For detoxification, F and P are effectively immobilized as CaF2and Ca2P2O7. The relative content of detected gas-phase nitriles is minimized to <2% due to the strong antagonistic effect of Ni2+on Li+-promoted hexanedinitrile cleavage, while sulfur species derived from 1,3-propane sultone are converted to SO2and ultimately mineralized as calcium and metal-sulfur salts. Mechanistically, product distributions and crystallographic properties suggest a hypothesized sequential activation model—Li+→ Ni2+→ Mn4+—governing reactivity, whereas Co2/3+does not participate in the synergistic detoxification and selective upgrading process. This migration–reaction coupling framework provides critical insights for cathode-assisted in situ catalytic pyrolysis and closed-loop electrolyte recycling.
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高影响因子
CERAMICS INTERNATIONAL
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2026
·
IF 6
Huihui Liu,Yiping Wang,Jun Chen,Kai Xia,Ying Yang
High-power piezoelectric ceramics require both a high piezoelectric coefficient and a large vibration output. Yet, simultaneous optimization remains challenging because of the intrinsic coupling between polarization activity and mechanical loss. Here, Mn/Nb ratio engineering was applied to 0.9 Pb(Zr 0.5 Ti 0.5 )O 3 -0.1 Pb(Mn 1/3 Nb 2/3 )O 3 -0.01Co 3 O 4 -0.001Fe 2 O 3 (PZT-PMN) ceramics to regulate phase structure and electromechanical properties. An optimized R3m/Cm/P4mm multiphase coexistence was achieved through composition tuning, together with regulated grain growth and polarization behavior. At a Mn/Nb ratio of 0.4, the ceramic exhibits a superior piezoelectric coefficient ( d 33 = 420 pC/N), electromechanical coupling factor ( k p = 0.62), and mechanical quality factor ( Q m = 1608), along with stable d 33 variation <5% from 25 to 275 °C and a maximum vibration velocity of 0.57 m/s, exceeding that of commercial PZT4 under identical conditions. The enhanced performance is associated with the coupled regulation of defect chemistry, phase coexistence, and domain-wall dynamics. A composition-driven strategy for balancing piezoelectric activity and high-power output in PZT-based ceramics is identified.
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高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2023
·
IF 4.6
Wenzhe Luo,Longsheng Cao,Ming Hou,Yawen Zhou,Zhiwei Ren,Jiangtao Geng,Zhigang Shao
Developing a low-price, high catalytic activity, and strong durability electrocatalyst for alkaline oxygen reduction reaction (ORR) is significantly important for anion exchange membrane fuel cell (AEMFC). Herein, Co and Mn salts were added into ZIF-8 to obtain CoMn-ZIF-Ac-2. Co and Mn embedded in nitrogen-doped microporous carbon (CoMn-N-C-Ac-2-Ts, , 800, 900, and 1000°C) were obtained by carbonizing CoMn-ZIF-Ac-2 at various temperature. The influence of various pyrolysis temperature and molar ratios between Co and Mn toward ORR catalytic activity was researched. For CoMn-N-C-Ac-2-Ts, CoMn-N-C-Ac-2-800 had the highest ORR catalytic activity with the half-wave potential of 0.875 V in 0.1 M KOH, only 5 mV lower than that of 20 wt % Pt/C. Besides, high 4e- selectivity, excellent stability (retaining 100% for 20 h at 0.6 V vs. RHE), and methanol tolerance are also exhibited. In addition, CoMn-N-C-Ac-2-800 exhibited better ORR activity than Mn-N-C-Ac-800 and Co-N-C-Ac-800, which was attributed to more Co-N4, more MnIII species, and higher surface area. Moreover, the AEMFC based on the CoMn-N-C-Ac-2-800 cathode catalyst obtained a maximal power density of 291 mW·cm-2, which was 78% of the achieved with 20 wt % Pt/C (375 mW·cm-2). The highest ORR performance for CoMn-N-C-Ac-2-800 was contributed by the highest defect degree, the most amounts of Co/Mn-N4 active site, the maximum BET surface area, and micropore structure.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Hao Cai,Tianci Zhao,Zichuan Ma
Nanoscale magnetic spinel ferrite composites with the general formula MFe 2 O 4 @PC (M = Fe, Cu, Co, and Mn; PC = biochar) were prepared by a facile impregnation and pretreatment method. MFe 2 O 4 @PC particles were deliberated by X-ray Diffractometer (XRD), Fourier Transform Infrared (FTIR), Scanning Electron Microscope (SEM), Brunauer–Emmett–Teller adsorption–desorption isotherm (BET), X-ray Photoelectron Spectroscopy (XPS) and Vibrating Sample Magnetometer. The results showed that MFe 2 O 4 coating, which is evenly distributed on the surface of HNO 3 -pretreated biochar, can provide more active sites to enable MFe 2 O 4 @PC to be activated by visible light. The XRD confirmed that the crystallite sizes of MFe 2 O 4 ranged from 10.0 to 27.9 nm. With the help of surface-OH, PCoF has a rapid adsorption performance on metronidazole (MNZ) and can degrade 99% of MNZ within 20 minutes at an optimal pH of 3.0. Meanwhile, the PCuF composites showed excellent photo-Fenton catalytic performance for the degradation of MNZ under neutral pH conditions, and 96.0% of MNZ (300 mg/L) could be removed within 120 min. This study confirmed OH is the main reactant, while O 2 − and h + contributed to the degradation of MNZ during photocatalysis . MFe 2 O 4 @PC composite can be separated easily by an external magnetic field. The synthesized PCoF was reused for 5 cycles and it was clear that it had no significant loss, indicating its excellent ability to remove MNZ from wastewater.
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高影响因子
Arabian Journal of Chemistry
·
2022
·
IF 6.212
Jie Zhao,Yan Gong
RNA plays a crucial role in biochemical processes. RNAs with abasic sites (AP-RNA), as one of RNA lesions, will cause serious negative consequences. Efficient and sensitive detection of AP-RNA deserves but does not receive enough attention. Water-soluble uridine triphosphate (UTP)-capped Mn-doped ZnS quantum dots (QDs), which have excellent room-temperature phosphorescence (RTP) properties, were prepared by wet-chemical method. The UTP on the surface of QDs could form a precipitation complex with amiloride (AMI) to quench the RTP. Meanwhile, abasic double-stranded RNA (AP-dsRNA) with a high affinity to AMI could dissociate AMI from the surface of UTP-QDs, resulting in RTP recovery. In this process, a highly sensitive and selective RTP-detection system for AP-dsRNA was constructed with AMI as the modulation factor and UTP-QDs as the luminescence matrix. RTP was turned off and on for the determination of AP-dsRNA, and the interference of background fluorescence and scattered light was effectively avoided during complex formation and aggregation. Steric hindrance of the conformation of AP-dsRNA provided efficient selectivity. The detection limit for AP-dsRNA was 0.86 nM, the relative standard deviation was 2.1%, and the recovery of biological samples with AP-dsRNA addition ranged from 95% to 103% at optimal conditions. The system is expected to provide new methods for environmental monitoring, early disease screening, and evaluation of gene editing efficiency.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
·
IF 5.816
Mengwei Guo,Zhuoming Wei,Qibo Zhang
The rational design and synthesis of highly efficient, precious metal-free electrocatalysts in the promotion of electrochemical water oxidation is essential for the sustainable use of renewable energy. Herein, an integrated, S-doped MnO x /Mn film developed on carbon paper (CP) formed by a two-step transformation approach that includes template-free electrodeposition and in-situ electrochemical oxidation is employed as an efficient oxygen evolution reaction (OER) electrocatalyst. The doping of S and in-situ electro-oxidation lead to a tailored electronic structure and phase composition , which endow the composite electrode with a significantly enhanced OER catalytic performance. This S-doped integrated electrode perfectly combines highly active MnO x outer layers with conductive metallic Mn inner layers to offer abundant catalytic interfaces and electronic paths, leading to favorable reaction kinetics. As a result, the optimal S-doped MnO x /Mn/CP offers a low overpotential of 435 mV at 10 mA cm −2 with a Tafel slope of 89.97 mV dec −1 as well as improved stability. Impressively, a highly intrinsic catalytic activity with a turnover frequency of 0.0112 s −1 is obtained for S-doped MnO x /Mn/CP, which is 4.2-fold higher than that of MnO x /Mn/CP. S doping plays a critical role in stabilizing the Mn III O x active phase and is ultimately responsible for the enhanced catalytic performance. This work provides an integrated design concept and S doping approach suitable for boosting the OER catalytic performance of MnO x .
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Muge Shele,Fei-Yan Qi,Xin-Yu Tian,Yong-Sheng Bao,Menghe Baiyin
Three organic-decorated quaternary TM-Cd-Sb-Se (TM = Zn, Mn, Fe) compounds were prepared under tris (2-aminoethyl) amine conditions by solvent method, namely, [Zn(tren)] 2 CdSb 2 Se 6 ( 1 ), [Mn(tren)]CdSb 2 Se 5 ( 2 ) and [Fe(tren)]Cd 2 SbSe 5 ( 3 ) [tren = tris (2-aminoethyl) amine)]. The single-crystal X-ray diffraction analyses showed that the three compounds structures were 0-D {[Zn(tren)] 2 CdSb 2 Se 6 } ( 1 ) cluster, 1-D {[Mn(tren)]CdSb 2 Se 5 } ( 2 ) ribbon and 2-D {[Fe(tren)]Cd 2 SbSe 5 } ( 3 ) layered. A series of characterizations of these compounds were performed, as estimated from the adsorption spectra, the band gaps of 1 , 2 and 3 are 2.09, 1.78 and 1.91eV, respectively. Photoluminescence experiments show that compounds 2 and 3 exhibit luminescent properties. And the thermal stability of these compounds was tested by thermogravimetric and differential scanning calorimetry .
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yongwei Zhang,Sining Yun,Xinying Qiao,Menglong Sun,Jiaoe Dang,Changwei Dang,Jingjing Yang
Developing high-performance and low-cost catalysts for replacing Pt-based catalysts is a significant challenge for solar cells and water splitting applications. In this work, a bifunctional hybrid catalyst of MnTa 2 O 6 @MPC (MPC: mesh-like bio-based porous carbon) was synthesized, using a co-precipitation approach. Benefiting from the high specific surface area (332.743 m 2 g −1 ), integrating the merits of the electrical conductivity of MPC, the outstanding electrocatalytic ability of MnTa 2 O 6 , and the synergistic effect between MnTa 2 O 6 and MPC, the catalytic activity of MnTa 2 O 6 @MPC was significantly enhanced. To boost the photovoltaic performance of dye-sensitized solar cells, a novel Cu 2+ /Cu + redox mediator and dye (Y123, D35) were adopted for replacing the traditional I 3 - /I - redox mediator and N719 dye, respectively. The resulting advanced solar cell with the Cu 2+ /Cu + redox mediator based on the MnTa 2 O 6 @MPC counter electrode catalyst exhibited a photovoltage of ~0.88 V, and cell efficiencies of 3.41% and 1.92% for the D35 and Y123 dye systems, respectively, which are respectively 16% and 8% higher than that of Pt. MnTa 2 O 6 @MPC also exhibited significant catalytic ability for hydrogen production, yielding a small overpotential of 141.9 mV at a current density of 10 mA cm −2 and a small Tafel slope of 105.0 mV dec −1 in an alkaline medium. This work provides promising guidance for designing bifunctional hybrid electrocatalysts for high-performance new energy devices.
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高影响因子
CATALYSIS TODAY
·
2019
·
IF 4.888
Tianyu Gao,Yongxuan Yin,Guanghui Zhu,Qiue Cao,Wenhao Fang
Oxidative transformations of HMF are key routes toward a wide variety of chemicals and biofuels through an environmental friendly process. Co 3 O 4 NPs decorated Mn-Co-O solid solution, donated as Co 3 O 4 /Mn X Co, was prepared by co-precipitation method and used as non-precious metal catalyst for base-free oxidation of HMF to FDCA in the presence of O 2 and water. Comprehensive characterizations such as XRD, H 2 -TPR, O 2 -TPD, XPS, NH 3 /CO 2 -TPD and TEM were used to study materials properties especially the oxygen mobility and acidity-basicity. The effect of Mn/Co molar ratio in catalyst and the reaction conditions were investigated and optimized. In addition, the kinetics of the reaction was monitored to reveal the reaction route and rate-determining step. The variation of Mn/Co molar ratio was found to affect not only HMF conversion but also distribution of products. When the Mn/Co ratio was of 0.2, the Co 3 O 4 /Mn 0.2 Co catalyst showed the optimal catalytic performance (i.e., >99% yield of FDCA obtained under 1 bar O 2 at 140 °C after 24 h) due to the highest content of both Lewis and Brønsted acid sites on the surface, leading to the strongest ability of HMF adsorption and COOH group formation, as well as the enhanced oxygen mobility. This catalyst was shown stable after a minor deactivation (≤8%) during six recycling uses and its activity can be entirely regenerated by calcination in air.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xiaojie Qiu,Shengjiong Yang,Mawuli Dzakpasu,Xiaoping Li,Dahu Ding,Pengkang Jin,Rongzhi Chen,Qionghua Zhang,Xiaochang C. Wang
Mn 0.8 Fe 2.2 O 4 magnetic nanocrystals (Mn 0.8 Fe 2.2 O 4 MNCs) are synthesized by thermal treatment of a metal-organic framework (MOF) template, and their physicochemical properties are characterized in detail. The Mn 0.8 Fe 2.2 O 4 MNCs exhibited highly efficient performance for the catalytic degradation of Bisphenol A (BPA) by peroxymonosulfate (PMS) activation at various initial pH, catalyst dosage, and PMS concentration. A leaching solution experiment evidenced that PMS activation by the Mn 0.8 Fe 2.2 O 4 MNCs is a heterogeneous process. Interestingly, scavenging experiments and electron paramagnetic resonance (EPR) analysis demonstrated that HO is the dominant radical for BPA degradation, rather than SO 4 − . The scavenger experiment indicated that the surface-bound radicals may play the crucial role for BPA degradation. Increasing Cl − or decreasing bicarbonate concentrations in solution enhanced the catalytic degradation process significantly through non-radical pathways. The Mn 0.8 Fe 2.2 O 4 MNCs exhibited desirable stability and reusability, that the spent Mn 0.8 Fe 2.2 O 4 MNCs could be significantly regenerated by thermal treatment at 450 °C in open air. Findings from this study would expand the applications of MOFs and also provide new insights into the enhancement of degradation efficiency during PMS activation processes.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Zijian Song,Ben Wang,Wu Yang,Tao Chen,Chuan Ma,Lushi Sun
Fe 2.5 M 0.5 O 4 (M = Mn, Ti and Cu) were investigated for the first time as the catalyst for simultaneous removal of NO and SO 2 through catalytic oxidation-absorption with vaporized H 2 O 2 . The physicochemical properties of as-prepared catalysts were comprehensively characterized by XRD, SEM, TEM, BET, XPS, TPR, VSM, TG and PL analyses. Activity test results showed that SO 2 can be completely removed under most conditions. However, NO removal was affected by catalyst, H 2 O 2 consumption, reaction temperature, GHSV and coexistence gases (i.e., H 2 O, O 2 , NO and SO 2 ). Mn, Ti and Cu doping in the magnetite can remarkably enhance NO removal. Redox pairs and oxygen vacancy of catalysts were considered as vital factors affecting OH generation. Base on the catalyst characterization and DFT calculation results, the main mechanism of Mn, Ti and Cu doping on the catalytic activity improvement was explained as follows: (a) Mn, Ti and Cu doping can increase the catalyst surface area; (b) Ti on the surface can directly promote the catalytic decomposition of H 2 O 2 ; and (c) Mn and Cu doping can promote the generation of oxygen vacancy and indirectly increase the activity. Moreover, two arrangement forms of an industrial simultaneous removal system for NO, SO 2 and Hg 0 were proposed.
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高影响因子
危险品化学品经营许可证（带存储）