ENVIRONMENTAL RESEARCH
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2026
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IF 8.2
Yong Chen,Huiping Zeng,Jiaxin Xu,Sibo Fu,Yuliang Zhu,Fanxu Zeng,Luyao Teng,Jiahao Wu,Fanhao Meng,Dong Li,Jie Zhang
This work simplified the structure of waste iron-containing sludge from groundwater treatment plants to explore its mechanism of activating periodate(PI) for degrading organic pollutants in water. The pH during preparation was used to regulate the crystallinity and the doping of transition metal Mn in the precursor solution to prepare catalysts similar to the waste iron-containing sludge. Sulfadiazine (SDZ) was selected as the model contaminant, and it was found that the efficiency of the prepared catalyst to remove the contaminants was 100% in 10min by activating PI. Combining electrochemical and performance experiment results, it was found that the amorphous part of the material can optimize the electronic structure and enhance the electron transfer ability. However, Mn doping can also reduce the electron transfer resistance, and the synergistic effect of Fe-Mn bimetal occupied a more important part in the entire catalytic system. According to the results of Electron paramagnetic resonance (EPR) and quenching experiments, it was found that although a variety of free radicals were produced, the active substances that contributed the most were IO 3 • and 1 O 2 . The materials showed certain environmental adaptability in the subsequent experiments. This study provides theoretical support for removing organic pollutants from waste iron-containing sludge and provides some basic insights for bimetal synergistic activation of PI.
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高影响因子
JOURNAL OF COORDINATION CHEMISTRY
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2023
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IF 1.9
Xiao-Tong Song,Ying Zhou,Gui-Bao Liu,Hui-Chao Guan,Shu-Mei Yue
By single-crystal X-ray diffraction (XRD) analysis, five complexes, catena-[(µ-2,2-bis(4-carboxyphenyl)hexafluoropropane)-(2-(pyidin-2-yl)-1,3-benzothiazole)-aqua-zinc(II)] (1), catena-[(µ-2,2-bis(4-carboxyphenyl)hexafluoropropane)-(2-(pyidin-2-yl)1,3-benzothiazole)-aqua-cadmium(II)] (2), catena-[hepta(µ-2,2-bis(4carboxyphenyl)hexafluoropropane)-diaqua-bis(2-(pyidin-2-yl)-1,3-benzothiazole)-tri-manganes(II)] (3), catena-[(µ-benzene-1,2,4,5-tetracarboxylato)-(2-(pyidin-2-yl)-1,3benzothiazole)copper(II)] (4) and catena-[(µ-3-nitrobenzene-1,2-dicarboxylato)-(2-(pyidin-2-yl)1,3-benzothiazole)-aqua-zinc(II)] (5), were characterized in this research. In these five complexes, H2hfipbb = 2,2-bis(4-carboxyphenyl)hexafluoropropane, H4btec = 1,2,4,5-benzenetetracarboxylic acid, H2NPTA = 3-nitrophthalic acid and bpt = 2-(pyridin-2-yl)benzo[d]thiazole). Complexes 1 and 2 occur in the monoclinic system with space group C2/c, 4 and 5 occur in the monoclinic system with space group P21/c, and 3 occurs in the triclinic system with space group P-1. The interaction between CT-DNA (calf thymus DNA) and those complexes was examined using UV spectroscopic analysis, fluorescent spectroscopic analysis, circular dichroism spectroscopy (CD) and viscosity analysis. This research reveals that those complexes have strong ability to interact with DNA, and they all bind to DNA in an intercalation mode, thus affecting the structure of DNA. This binding mode can arise from the interaction between the benzothiazole metal complexes and DNA. Hence, we hope to provide some scientific research bases for studying benzothiazole complexes and designing new thiazole anticancer drugs.
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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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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
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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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Arabian Journal of Chemistry
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2022
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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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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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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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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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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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JOURNAL OF SOLID STATE CHEMISTRY
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2021
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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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CHEMICAL ENGINEERING JOURNAL
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2019
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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
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2023
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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
CATALYSIS TODAY
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2019
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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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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2018
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IF 2.891
Tingting Gan,Nanjing Zhao,Gaofang Yin,Jianguo Liu,Wenqing Liu
As a kind of serious concern environmental toxic pollutants, sulfide is widely used in various industrial processes, and generated from the process of biological metabolism. However, the sensitive, rapid and effective detection of sulfide still remains challenge. In this paper, a simple and rapid room-temperature phosphorescence (RTP) method for the detection of sulfide with a high selectivity and sensitivity was proposed by using mercaptopropionic acid (MPA)-capped Mn-doped ZnS quantum dots (QDs) and Pb 2+ as a sensing system. Highly water-soluble MPA-capped Mn-doped ZnS QDs with phosphorescence emission property were successfully synthesized by microwave-assisted hydrothermal synthesis method. We discovered that the as-prepared QDs displayed effectively phosphorescence quenching to Pb 2+ in pH 11.5 borax-NaOH buffer solution, then demonstrated remarkable phosphorescence recovery after the addition of sulfide to the QDs-Pb 2+ system. Therefore, based on the phosphorescence "off-on" behavior of MPA-capped Mn-doped ZnS QDs, a simple, sensitive and selective phosphorescence method for rapid detection of sulfide was successfully developed. The quenching and recovery of the phosphorescence of MPA-capped Mn-doped ZnS QDs have been studied in detail. Under the optimized conditions, the recovered degree of RTP intensity had a very good linear relationship with sulfide concentration in the range of 2 × 10 −7 –80 × 10 −7 mol L −1 with a correlation coefficient of 0.9982, and a lower detection limit of 6.89 × 10 −8 mol L −1 . The relative standard deviations for eleven times repeated detections of 5 × 10 −6 and 8 × 10 −6 mol L −1 sulfide were 3.24% and 4.50%, respectively. The proposed method could effectively avoid the interferences of common anions, fluorescence substances and scattering light. Furthermore, it was successfully applied to detect sulfide in real water samples with satisfactory results, and the recoveries were in the range from 94.2% to 107.1%. This work will provide the basis of method for the development of fast and on-line monitoring sensors of small molecule pollutions in water.
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