RESEARCH ON CHEMICAL INTERMEDIATES
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2022
·Vol. 49
·期 8
·3381-3393
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IF 3.134
Yang Haoguo,Guo Yijun,Han Shitong,Xi Hailing,Lin Huaxiang,Yuan Rusheng,Ding Zhengxin,Long Jinlin,Lin Qun
Mustard gas is a kind of erosive poison with great harm and used as a chemical weapon since World War. It has suggested that the photocatalytic technology is an effective method to eliminate it. Because the small difference in molecular structure between 2-CEES and Mustard gas, and the less toxic of 2-CEES, 2-CEES is often used as a simulator to evaluate the photocatalytic activity of catalysts. In this work, symbiotic mixture of Bi 2 WO 6 and Bi 6 O 6 (OH) 3 (NO 3 ) 3 ·1.5H 2 O nanosheets doped with Mo (Mo-B-B) have been synthesized by a facile hydrothermal treatment. The samples were characterized by XRD, DRS, XPS, SEM, TEM, Raman, and PL. The photocatalytic activity of the samples was evaluated by measuring the degradation of 2-CEES under visible light irradiation. The results showed that the doped Mo reduce the Eg of bare symbiotic mixture and improve the separation efficiency of photo-generated carriers that is beneficial to photocatalytic activity. The optimum amount of doped Mo is 5% that exhibits the best activity for degradation for 2-CEES.
研究领域:
材料科学
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环境科学
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化学工程
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纳米技术
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光催化
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Chenxi Lu,Yuanzhuo Zhou,Liangzhi Li,Hongwei Chen,Lishi Yan
Catalytic production of 5-hydroxymethylfurfural (5-HMF) from glucose is a promising routine for generation of varied value-added chemicals. Herein, Mixed-Metal metal–organic frameworks (MOFs)–Fe/MIL-101(Cr) and MIL-101(Cr, Fe) obtained from post-synthesis modification and one-pot synthesis approach respectively were applied for catalytic converting glucose to 5-HMF. The synthesized Mixed-Metal MOFs were characterized by PXRD, SEM, N 2 adsorption–desorption analysis, TGA, XPS and NH 3 -TPD. Cr-and Fe-containing Mixed-Metal MOFs Fe/MIL-101(Cr) and MIL-101(Cr, Fe) presented synergistic effect with enhanced catalytic ability for glucose transformation to 5-HMF compared with typical single-metal MOFs and sulfonic acid-functionalized MOFs. Moreover, these two Mixed-Metal MOFs also presented better thermal stability than single-metal MOFs like MIL-101(Cr). Fe/MIL-101(Cr) was found to possess higher catalytic performance than MIL-101(Cr, Fe). 55.8 % 5-HMF yield was obtained with Fe/MIL-101(Cr) at 170 °C for 2 h in DMSO/water system. In addition, Fe/MIL-101(Cr) demonstrated desired recyclability for five times without incredible loss in its activity. This study provides a Mixed-Metal strategy on MOFs for improving catalytic efficiency of glucose conversion to 5-HMF.
研究领域:
化学工程
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材料科学
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催化
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
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2025
·Vol. 15
·期 6
·545
·
IF 4
Xiaohong Yao,Jian Zhang,Chao Long
This study explored how pore size engineering in Nb-Mn/MCM-41 catalysts affects plasma-catalytic toluene oxidation. Adjusting the pore diameter (2.49–3.98 nm) modulated metal-support interactions and oxygen dynamics, with pore expansion to 3.73 nm (M3) optimizing the Mn4+/(Mn2++ Mn3+) ratio (XPS: 36.8%), the amount of lattice oxygen species (O2-TPD: 0.222 mmol/g), and crystallite size control (1.5 ± 0.2 nm, TEM). Smaller pores (M1: 2.49 nm) enhanced toluene adsorption but limited active site accessibility, while oversized pores (M4: 3.98 nm) reduced oxygen storage capacity (0.600→0.412 mmol/g). The Nb-Mn/M3 catalyst achieved superior performance with 96.8% toluene conversion, 55.0% CO2selectivity, and 85.4% carbon balance, while minimizing organic byproducts (GC-MS). Mechanistic studies revealed pore-mediated oxygen storage-transport cycles as critical for decoupling adsorption and oxidation steps. This study reveals fundamental mechanisms linking pore architecture to plasma-catalytic synergy in toluene oxidation, offering critical insights for the systematic design of energy-efficient, plasma-catalytic systems targeting industrial VOCs remediation.
研究领域:
催化化学
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环境化学
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材料科学
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等离子体化学
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纳米技术
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表面科学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
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2025
·Vol. 15
·期 7
·825
·
IF 2.8
Jiefeng Wang,Shilin Li,Yifan Guo,Jiaqi Ding,Zhi Lu
A novel catalyst with a metal sulfide/hydroxide heterostructure was prepared by introducing sulfur ions into NiMnFe layered hydroxide by a simple hydrothermal method, using a series of characterization methods and electrochemical tests to explore the optimal sulfur ion doping amount. The XPS results show that the introduction of sulfur ions leads to a change in metal electron delocalization, which is conducive to the OER procedure. The newly formed metal sulfide can not only improve the conductivity of NiMnFe LDH/NF electrode materials but also enhance the intrinsic catalytic activity of the materials. The electrochemical performance indicated that the S2-NiMnFe LDH/NF catalyst required only 205 mV overpotential to provide a current density of 10 mA−2, and the Tafel slope was only 45.79 mV dec−1. In addition, the large turnover frequency value (1.2614 S−1) reflects the excellent intrinsic activity of the novel catalytic material.
研究领域:
材料科学
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电化学
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催化
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纳米技术
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能量转换
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Jinshan Xie,Xiaoxiang He,Kexin Liu,Wulong Li,Zhanxiong Li
In this paper, carboxylated cotton fabric (CF-Ph-COOH) were obtained as active substrate by diazonium radical polymerization modification of cotton fibers. Then the MOF fabric composites were prepared by in situ growth of metal zirconium ions (Zr) and organic ligands on the surface of carboxylated cotton fabrics under carboxylic acid modifier. MOF fabric composites with controllable morphologies structures were achieved by regulating organic ligands, reaction time the type and dosage of regulator (formic acid and acetic acid). The prepared acetic acid regulated MOF fabric composites were designated as CF-HAc1-UiO-66, CF-HAc2-UiO-66, CF-HAc1-UiO-66-NH 2 , and CF-HAc2-UiO-66-NH 2 , respectively, and the formic acid regulated as CF-FA-UiO-66 and CF-FA-UiO-66-NH 2 . The fabricated carboxylic acid modulated MOF fabric composites were well characterized using SEM, TGA, XRD, FTIR, and XPS spectra. The adsorption experiment results show that carboxylic acid modulated Zr based MOF fabric composites can serve as adsorbent for effective removal of Cr(VI) from water, in which the CF-FA-UiO-66-NH 2 was prepared under the ratio of ZrCl 4 and BDC-NH 2 is 1.006 and with 5.47 M formic acid regulator exhibits that the optimal adsorption efficiency and the removal efficiency is 79.5 %. In addition, the adsorption of Cr(VI) in water by CFA-UiO-66-NH 2 showed a quasi-secondary kinetic model following the Langmuir adsorption model, showing a a typical of chemisorption. What’s more, the Cr(VI) removal efficiency and saturated adsorption capacity of CF-FA-UiO-66-NH 2 was up to 80 % and 318.85 mg/g, respectively. The prepared CF-FA-UiO-66-NH 2 MOF fabric composite was recyclable for removal of Cr(VI), and could be used as the potential adsorbent membrane for waste water treatment.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2020
·Vol. 12
·期 17
·4339-4345
·
IF 4.853
Yuanxin Du,Xin Ding,Meng Han,Manzhou Zhu
Graphical Transition-metal phosphides : A series of ternary FeCoNi-PBAs (from truncated octahedrons to cubic octahedrons and truncated cubes) were obtained by temperature control surfactant desorption ability. The derived FeCoNi−Ps showed better OER activity than RuO 2 , especially FCN-40-P exhibited optimal performance because its appropriate composition promotes OH − adsorption, as confirmed by XPS analyses. Prussian blue analogues (PBAs) are mostly binary metallic compounds with a cubic structure, which greatly limits the structure and component of derived transition-metal phosphides (TMPs) and affects their catalytic activities. This work focuses on regulating the morphology and composition of the PBA at the front-end to optimize the OER performance of the derived TMP. By temperature control surfactant desorption ability, we obtain a series of ternary FeCoNi (FCN-PBAs). With the increase of temperature, their morphologies change from truncated octahedrons to cubic octahedrons and truncated cubes, in which the Fe content basically remains unchanged and the Co/Ni ratio gradually decreased. Due to the synergistic effect among ternary TMPs, all phosphidation products (FCN-P) exhibit better OER activities than RuO 2 , among which FCN-40-P shows the best performance. As confirmed by XPS analyses, the appropriate chemical composition enhances the oxidizabilityof TM species, promotes the chemical adsorption of OH − , and accelerates OER kinetics.
研究领域:
催化
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材料科学
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电化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2018
·
IF 6.434
Lan Cao,Changjun Yang,Bingguang Zhang,Kangle Lv,Mei Li,Kejian Deng
ABSTRACT A new ZnO/CoPz(hmdtn) 4 composite as a highly efficient photocatalyst was successfully prepared by cobalt tetra(2-hydroxymethyl-1,4-dithiin)porphyrazine (CoPz(hmdtn) 4 ) impregnated onto the surface of ZnO nanoparticles, the photocatalytic performance of ZnO/CoPz(hmdtn) 4 under both simulated sunlight and visible light (λ ≥ 400 nm) irradiation was assessed by degradation of Rhodamine B (RhB) and phenol in aerated conditions. The ZnO/CoPz(hmdtn) 4 manifested much higher photocatalytic activity than pure ZnO and pure CoPz(hmdtn) 4 , originating from the synergistic effect between CoPz(hmdtn) 4 and ZnO. Furthermore, the XPS analysis revealed that there may be strong interaction between CoPz(hmdtn) 4 and ZnO. Thereby ZnO/CoPz(hmdtn) 4 with excellent stability can maintain high photocatalytic activity over five runs on the basis of the reusability test. The active species generated in the photocatalytic system were verified by electron spin resonance (ESR) technology. A possible mechanism of the synergistic effect between CoPz(hmdtn) 4 and ZnO was also proposed.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2019
·
IF 3.47
Zhi Zheng,Jun Wang,Yi Wei,Xuejun Liu,Fengwen Yu,Jianbing Ji
La-Fe modified Si-MCM-41 (La-Fe/Si-MCM-41) catalysts were prepared by the wet impregnation method and used in catalytic cracking of soybean oil (CCS) for biofuel production. The catalysts were characterized by BET, XRD, XPS, Py-FTIR and CO 2 -TPD. The results showed that the aromatics content increased with the increase in B/L value, while the content of oxygenated compounds decreased, indicating that Brönsted acid sites were the major active sites for deoxygenation and aromatization reactions. Compared with Si-MCM-41, the Brönsted acidity of LFM-6 sharply decreased from 22.49 to 5.86 μmol g −1 . Accordingly, the aromatics content was reduced from 37.51 wt.% to 14.52 wt.% which was lower than the limitation (15 wt.%) according to the global environmental legislation. However, for the LFM-6 catalyst, the excessive loss of Brönsted acid sites and sharp decrease in BET surface area and pore volume led to the decrease in deoxygenation. As a result, the fatty acids content increased from 2.71 wt.% to 16.67 wt.% and the acid value reached 35.20 mgKOH g −1 . When the La-Fe loading increased to 15 wt.%, part of fatty acids were converted into ketones by the active sites on Fe 2 O 3 /La 2 O 3 and strong Lewis acid sites on catalysts. Besides, the new weak Lewis acid and basic sites on Fe 2 O 3 /La 2 O 3 exhibited the synergistic effect on promoting the generation of alkenes. The CaO/LFM-6 composite catalysts prepared by the mechanical mixing of LFM-6 and CaO were used in CCS to reduce the acid value of biofuel. LFM-6-C-3 was proved to be an effective catalyst for CCS to produce biofuel with low aromatics (12.31 wt.%) and fatty acids (2.76 wt.%) content.
研究领域:
催化
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生物燃料
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 14
·3744-3754
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IF 6.367
Wangda Qu,Zizhu Zhao,Jie Wang,Fengying Dong,Hui Xu,Xinzhi Sun,Hong Jin
A facile and additive-free approach was developed to synthesize pure lignin-derived porous carbon for highly flexible supercapacitor electrodes. Lignin was simply melted on a carbon cloth, and then subjected to direct laser writing (DLW). It was found that lignin was transformed into 3D porous graphene while bonding on the carbon cloth. The fabricated materials (LCE) under different laser powers were all confirmed as having a sharp (002) peak with small d002 spacing from the XRD profile, and a high IG/ID ratio from Raman spectra. The LCEs showed promising capacitive behaviors in electrochemical testing. The best LCE (i.e., LCE40) possesses a CA of 786 mF cm−2, and it was further characterized by XPS and HRTEM to determine its compositional and structural information. Moreover, LCE40 had super flexibility attributed to carbon cloth as the substrate. The CA of the LCE after bending remained at 93–97% under different current densities. When assembled into symmetric solid-state supercapacitors, the LCE40-based device showed an areal capacitance of 148.6 mF cm−2, which is much superior to all other reported laser-induced lignin-derived carbon. This one-step process is innovative and simpler than any other porous carbon fabrication and provides a method for fabricating lignin-derived flexible supercapacitors.
研究领域:
材料科学
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电化学
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纳米技术
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能量存储
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2022
·
IF 7.336
Sijie Gao,Shuozhen Hu,Guoming Luo,Shigang Sun,Xinsheng Zhang
Doping nitrogen (N) into the carbon support was widely applied to enhance the performance of Pd toward formic acid electro-oxidation (FAO). However, traditional nitrogen doping methods can only introduce a low content of nitrogen as well as a two-step complicated procedure to synthesize catalysts. In this study, a facile one-pot strategy is demonstrated to prepare N-doped carbon encapsulated palladium nanoparticles (Pd@N x C) via the pyrolysis of 2,2′-bipyridine palladium (II) complexes. A N-doped carbon layer with the thickness of about 4 nm is in-situ generated over Pd nanoparticles by only one pyrolysis procedure. Both XPS and in-situ XRD results suggest that metallic Pd is reduced from Pd 2+ by the complexed N in bipyridine during the pyrolysis at high temperature. The physical characterizations prove that the in-situ formation of N-doped carbon shell can not only effectively prevent the agglomeration or dissolution of Pd nanoparticles, but also promote the charge donation from the carbon layer to Pd, and maintain the structure of Pd atom complexed to two pyridinic-N atoms (Pd-N). This in-situ synthesis strategy can be successfully applied to carbon supports with different geometry, such as reduced graphene oxide and Vulcan XC-72. Pd@N 3 C/rGO, which contains the highest amount of N (7.39 at.%) and Pd-N (33.15%), shows the highest specific activity (5.88 mA cm −2 ) and excellent durability toward FAO.
研究领域:
材料科学
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电化学
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催化
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2017
·Vol. 30
·期 4
·467-473
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IF 0.498
Zhang Yong,Chen Chun,Gong Wan-bing,Song Jie-yao,Su Yan-ping,Zhang Hai-min,Wang Guo-zhong,Zhao Hui-jun
A variety of spherical and structured activated charcoal supported Pt/Fe 3 O 4 composites with an average particle size of ∼100 nm have been synthesized by a self-assembly method using the difference of reduction potential between Pt (IV) and Fe (II) precursors as driving force. The formed Fe 3 O 4 nanoparticles (NPs) effectively prevent the aggregation of Pt nanocrystallites and promote the dispersion of Pt NPs on the surface of catalyst, which will be favorable for the exposure of Pt active sites for high-efficient adsorption and contact of substrate and hydrogen donor. The electron-enrichment state of Pt NPs donated by Fe 3 O 4 nanocrystallites is corroborated by XPS measurement, which is responsible for promoting and activating the terminal C=O bond of adsorbed substrate via a vertical configuration. The experimental results show that the activated charcoal supported Pt/Fe 3 O 4 catalyst exhibits 94.8% selectivity towards cinnamyl alcohol by the transfer hydrogenation of cinnamaldehyde with Pt loading of 2.46% under the optimum conditions of 120 °C for 6 h, and 2-propanol as a hydrogen donor. Additionally, the present study demonstrates that a high-efficient and recyclable catalyst can be rapidly separated from the mixture due to its natural magnetism upon the application of magnetic field.
研究领域:
催化
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Zhong Sun,Yihan Yin,Yupeng An,Chao Deng,Ziyu Wei,Zijiang Jiang,Xixin Duan,Xiaohui Xu,Jing Chen
A cost-efficient and simple method, grafting sodium sulfonate groups (−SO 3 Na) onto carboxymethyl cellulose (CMC), was developed to form hydrogel adsorbents for the removal of poisonous metals including Cu(Ⅱ) and Zn(Ⅱ) from wastewater. In this work, cellulose-based hydrogels (CMC-g-P(AA-co-SS)) were prepared using acrylic acid (AA) and sodium styrene sulfonate (SS). FTIR, XPS , SEM , and EDX were employed to analyze the surface morphology and structure of CMC-g-P(AA-co-SS). The results revealed that the synergistic effect of −SO 3 Na and carboxylate groups (−COO − ) facilitated the adsorption of heavy metals. Moreover, introducing AA and SS enhanced the swelling degree of CMC hydrogels. The results of adsorption experiments showed that high adsorption efficiencies were obtained for Cu(Ⅱ) and Zn(Ⅱ) (200.44 mg/g and 192.28 mg/g, respectively) within 180 min. The adsorption isotherm and kinetics indicated that the monolayer chemical adsorption dominated the process. After 5 cycles, the adsorption activity of CMC-g-P(AA-co-SS) remained high, with the adsorption capacity for Cu(Ⅱ) and Zn(Ⅱ) being 93.3% and 78.3% of the original, respectively. Thus, the CMC-g-P(AA-co-SS) is a promising adsorbent candidate for the removal of poisonous metals from wastewater.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）