INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Jiamin Huang,Guanghui Zhang,Jie Zhu,Mingrui Wang,Fanshu Ding,Chunshan Song,Xinwen Guo
The catalytic conversion of CO2 to higher alcohols (HAs, representing ethanol and alcohols with more than two carbon atoms) has been of great interest to mitigating the greenhouse effect and effectively utilizing CO2. However, most present catalysts have disadvantages of poor activity (conversion less than 30%) and selectivity (less than 10%) and high price. Herein, we report a Mn- and K-modified iron carbide catalyst that offers a CO2 conversion higher than 40% and a selectivity of higher alcohols exceeding 10%, and the proportion of propanol and butanol in alcohol products is more than 30%. Unpromoted iron carbide has a strong ability of hydrocarbon chain growth, leading to the fast formation of hydrocarbon products rather than HAs. However, on the Mn- and K-modified iron carbide catalyst, K is used to increase the surface C/H ratio of the catalyst by enhancing the adsorption of CO2 on the catalytic surface. The increased C/H ratio is indispensable to the formation of HAs, and the addition of Mn promoter dramatically improves the production of HAs, especially the formation of propanol and butanol. The synergistic effect between Mn and K on iron carbide is the key to produce HAs. In addition, the Mn- and K-modified iron carbide is of low cost, which can potentially provide an alternative for the hydrogenation of CO2 to produce valuable chemicals.
研究领域:
催化化学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 7
·2577-2588
·
IF 6.119
Xian Wu,Weixin Qian,Haitao Zhang,Zhonghao Han,Hewei Zhang,Hongfang Ma,Dianhua Liu,Qiwen Sun,Weiyong Ying
CeO2 nanorods with a mean width of 11.9 nm were synthesized via a facile hydrothermal method. Subsequently, Fe/CeO2 and Fe/CeO2@xMnO2 catalysts were prepared from the CeO2 nanorods and applied in the high-temperature Fischer–Tropsch synthesis of light olefins. Results show that the CeO2 support donates electrons to Fe species, which promotes the dissociation of CO while suppressing the hydrogenation reaction, and then improves the selectivity to light olefins. The synergistic effect between Mn and Ce can improve the oxygen mobility on the catalyst surface and promote the electron-donating ability of Ce, thereby promoting the formation of χ-Fe5C2 and further improving the selectivity to light olefins. However, excess Mn hinders the contact between CeO2 and Fe species and the migration of O atoms, and electron transfer from Ce to Fe can be blocked. Additionally, the reduction of iron oxides was suppressed and subsequently the CO conversion was reduced. The best hydrocarbon distribution for light olefins was 40.4% at a CO conversion of 39.9% over the Fe/CeO2@0.2MnO2 catalyst.
研究领域:
化学工程
·
材料科学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2025
·
IF 3.9
Zhenfeng Bian,Yun Zhao,Xuejing Huang,Zhenmin Xu,Yang Liu,Hanwen Chen,Jing Yuan,Ting Zhang,Shiying Tang,Huangrong Wang,Wenshu Zhao,Haifang Mao
The involvement of peroxymonosulfate (PMS) in advanced oxidation processes represents a promising technology that can effectively reduce recalcitrant pollutants. In this study, taking advantage of the abundant and flexibly tunable terminal μ3-O groups of UiO-66, the high-efficient Mn modified UiO-66(Mn@UiO-66) was were prepared by direct complexation between μ3-O groups and Mn ions. It was optimized that the Mn@UiO-66 exhibited excellent catalytic performance to activate PMS for bisphenol A (BPA) degradation. Quenching experiment and electron paramagnetic resonance (EPR) showed that the non-free radical pathway was dominant in BPA degradation, and singlet oxygen (1O2) was the main active species. In addition, an abnormal pollutant dependent PMS activation behavior was revealed; UiO-66 enriched with μ3-O promotes PMS activation via the μ3-O-mediated Zr-O-Mn electron transfer pathway, boosting performance for selective degradation of target pollutants from water. Interestingly, the presence of multiple coexisting cations and anions have little effect on the BPA degradation rate and PMS decomposition. The Mn@UiO-66/PMS system could also degrade effectively various organic pollutants, indicating its potential practical application value.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Tingting Luo,Runkai Wang,Fei Chai,Lei Jiang,Pinhua Rao,Lili Yan,Xinjian Hu,Wei Zhang,Lianghuan Wei,Alireza Khataee,Ning Han
The manganese is successfully induced as a “bridge joint” to fabricate a new adsorbent (CNC–Mn-PEI) connecting cellulose nanocrystal (CNC) and polyethyleneimine (PEI) respectively. It was used to remove As (III) from waste water. It has been proved that the incompact CNC and PEI were successfully connected by Mn ions, which induced the formation of O–Mn–O bonds and the removal efficiency is maintained in the broad pH range of 4–8, even with the influence of NO 3 − and CO 3 2− . The CNC–Mn-PEI was characterized by Brunauer–Emmett–Telley (BET) method and the results showed that the nanoparticle of the specific surface area was 106.5753 m 2 /g, it has a significant improvement, compared with CNC–Mn-DW (0.1918 m 2 /g). The isotherm and kinetic parameters of arsenic removal on CNC–Mn-PEI were well-fitted by the Langmuir and pseudo-second-order models. The maximum adsorption capacities toward As (III) was 78.02 mg/g. After seven regeneration cycles, the removal of As (III) by the adsorbent decreased from 80.78% to 68.2%. Additionally, the hypothetical adsorption mechanism of “bridge joint” effect was established by FTIR and XPS, which provided the three activated sites from CNC–Mn-PEI can improve the arsenic removal efficiency, and providing a new stratagem for the arsenic pollution treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2022
·
IF 12.545
Xiang Lai,Yue Shen,Shoubei Gao,Yajing Chen,Yanshuai Cui,Dongxue Ning,Xianbing Ji,Zhiwei Liu,Longgang Wang
The selective detection of glutathione (GSH) has been used as important colorimetric probe for human health. Herein, we used a facile method to synthesize manganese ions modified porphyrin metal-organic framework (PCN-224-Mn) with a size of 125.7 ± 14.2 nm and zeta potential of −3.9 ± 0.5 mV. We showed that PCN-224-Mn catalyzed oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) in the absence of H 2 O 2 , resulting in a blue-colored oxidized TMB (oxTMB) that exhibits oxidase-like activity. Furthermore, a simple colorimetric detection method for GSH was developed based on the oxidase-like activity of PCN-224-Mn. This method shows wide linear detection range of 0.5–60 μM for GSH with a much lower detection limit of 0.233 μM. Finally, the recovery of colorimetric sensor of PCN-224-Mn suggests its great potential as a biosensor. As the catalytically active site, the manganese porphyrin unit plays a major role in the oxidase-like property and detection ability of PCN-224-Mn. Our data suggest that GSH detection method using PCN-224-Mn has great potential in multiple applications in the future.
研究领域:
生物化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Reaction Chemistry & Engineering
·
2023
·Vol. 8
·期 5
·1185-1191
·
IF 3.9
Lingjiang Kou,Yong Wang,Jiajia Song,Taotao Ai,Koji Kajiyoshi,Panya Wattanapaphawong,Jintao Wang
Developing a structurally controlled electrode has attracted widespread attention in recent years, which is ascribed to the morphology of cathode materials having an influence on the electrochemical performance. Herein, we present Mn-decorated (NH4)2V10O25·8H2O (NVOH) materials with a cauliflower-like, tremella-like, and purslane-like structure via a solvothermal approach. When examined as a cathode material for aqueous zinc-ion batteries (ZIBs), all three materials with different morphologies exhibited superior electrochemical performances. Especially for materials with a tremella-like structure, benefiting from the uniqueness of the porosity structure of the tremella, the active material has a larger contact area with the electrolyte, which increases the active sites and diffusion coefficient of Zn2+. This tremella-like NVOH delivered a high rate capability of 159 mA h g−1 at 500 mA g−1 together with long-term stability (85% retention after 500 cycles at 500 mA g−1). This study has great significance for the exploitation of cathode electrodes of aqueous ZIBs with high reversible specific capacity and long cycle life and provides a promising candidate cathode for practical rechargeable aqueous ZIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Mengchang Zhou,Changsong Zhou,Dong Chen,Hao Wu,Zhen Zhang,Hongmin Yang,Wei Ruan,Yaming Zhou,Zengqiang Tan
Gaseous toluene, one of the volatile organic compounds, has aroused wide concerns in China due to its growing emissions and harmfulness. Herein, novel manganese decorated UIO-66 catalysts (Mn/UIO-66) were prepared by hydrothermal synthesis and applied to the vaporized hydrogen peroxide system for toluene removal. TEM, BET, XRD, ICP, and XPS were used to analyze the chemical and physical characteristics of Mn/UIO-66. A toluene removal efficiency of 82% with the 3-Mn/UIO-66 catalyst in the vaporized hydrogen peroxide system could achieved. The effects of different reaction conditions (reaction temperature, hydrogen peroxide concentration, and initial toluene concentration) on toluene removal were determined. The yield of hydroxyl radical in the Mn/UIO-66 catalyst combined with the hydrogen peroxide system was positively correlated with the Mn decorated ratio. Results suggested that the catalytic performance is related not only to the yield of hydroxyl radical but also to the catalyst specific surface. The intermediate products during toluene removal were analyzed by gas chromatography-mass spectrometry (GC–MS), and the possible reaction pathway of toluene removal was proposed.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zheng Wang,Hui Li,Chuang Jiang,Wenya Liu,Siyu Zhang,Yibin Zhou,Kang Liu,Yaqing Xiao,Ruyan Hou,Xiaochun Wan,Yingnan Liu
Herein, a novel dual-mode probe for organophosphorus pesticides (OPs) colorimetric and photothermal detection was developed based on manganese modified porphyrin metal–organic framework (PCN-224-Mn). PCN-224-Mn had excellent oxidase-like activity and oxidized colorless 3,3,5,5-tetramethylbenzidine (TMB) to blue–green oxidation state TMB (oxTMB), which exhibited high temperature under near-infrared irradiation. l -ascorbate-2-phosphate was hydrolyzed by acid phosphatase to produce ascorbic acid, which weakened colorimetric and photothermal signals by impacting oxTMB generation. The presence of OPs blocked the production of ascorbic acid by irreversibly inhibiting the activity of acid phosphatase, causing the restoration of chromogenic reaction and the increase of temperature. Under the optimal conditions, the probe showed a good linear response to OPs in the concentration range of 5 ∼ 10000 ng/mL, using glyphosate as the analog. The detection limits of glyphosate in colorimetric mode and photothermal mode were 1.47 ng/mL and 2.00 ng/mL, respectively. The probe was successfully used for sensitive identification of OPs residues in tea, brown rice, and wheat flour. This work proposes a simple and reliable colorimetric/photothermal platform for OPs identification, which overcomes the problem that single-mode detection probes are susceptible to external factors, and has broad application potential in the field of food safety.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Siyuan Xia,Yujie Duan,Shanshan Yu,Yupei Sun,Hongxiang Zhu,Zihan Zhao,Lei Wang,Hui Liu,Yingping He,Hui He
The detection of pH and glutathione (GSH) is positively significant for the cell microenvironment imaging. Here, to assess the pH value and the concentration of GSH efficiently and visually, a cellulose-based multi-bands ratiometric fluorescence probe was designed by assembling MnO 2 -modified cellulose gold nanoclusters , fluorescein isothiocyanate-grafted cellulose nanocrystals (CNCs) and protoporphyrin IX-modified CNCs. The probe exhibits GSH-responsive, pH-sensitive and GSH/pH-independent fluorescent properties at 440 nm, 520 nm, and 633 nm, respectively. Furthermore, the probe identifies GSH within 4 s by degrading MnO 2 into Mn 2+ in response to GSH. Ingeniously, the green fluorescence of the probe at 520 nm was decreased with pH, and the red fluorescence at 633 nm remained stable. Therefore, the probe displayed distinguishing fluorescence colors from pink to blue and from green to blue for the synchronous detection of pH and GSH concentration within 4 s. The design strategy provides insights to construct multi-bands fluorescence probes for the rapid detection of multiple target analytes.
研究领域:
分析化学
·
生物技术
·
材料科学
·
细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）