Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Yuwei Xue,Lihua Liu,Ting Zhang,Ziqi Zhu,Mingjun Xu,Qian Zhang,Junming Hong
There has been growing attention in the combination of metal oxide nanoparticles with metal-organic frameworks (MOFs) for the synergistically intensified catalytic activity . Herein, functional Fe-MOF@Mn 2 O 3 composites were synthesized to activate peroxymonosulfate (PMS) for 4-Cholophenol (4-CP) degradation via a hydrothermal and calcination method. Under the reaction parameters of 2 mM PMS, 0.2 g/L catalyst dosage, and pH 7.0, 91.4% of 4-CP (10 mg/L) could effectively be degraded within 60 min (2.2-fold increase in reaction rate constant compared with pure Mn 2 O 3 ). The excellent degradation performance of Fe-MOF@Mn 2 O 3 /PMS system was attributed to the surface hydroxyl and synergistic effect between iron and manganese. Quenching reaction and EPR analysis revealed both sulfate (•SO 4 - ) and hydroxyl radicals (•OH) were responsible for 4-CP degradation. The Fe-MOF@Mn 2 O 3 composite exhibited intensive catalytic capability as well as electron transfer efficiency according to the electrochemical measurements. Meanwhile, the possible degradation pathways were proposed by analyzing intermediates via LC-MS detection. The results indicates that the Fe-MOF@Mn 2 O 3 /PMS system is effective and adaptable for the treatment of 4-CP in different water conditions.
研究领域:
环境科学
·
催化材料
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2019
·
IF 4.63
Peng Wu,Jiaqiang Sun,Mohamed Abbas,Pengfei Wang,Yilong Chen,Jiangang Chen
Hydrophobic SiO 2 -supported Fe-Ni bimetallic catalysts were synthesized by facile hydrothermal method, followed by grind-mixing process. The as-synthesized nanoparticles were appointed as robust catalysts in the methanation process to improve the calorific value of the natural gas. Notably, the functionalization of SiO 2 surface with a hydrophobic layer was performed using a fluorinated alkyl group, as a critical step to prohibit the water-gas shift (WGS) reaction and consequently produce low amount of CO 2 content during the methanation process. The obtained catalytic results demonstrated that Fe 1.5 Ni 1.5 catalyst exhibited an excellent CO conversion of 95.2% at 320 °C with a natural gas calorific value of 56.4 MJ Nm −3 , which is much higher than the previously reported results when traditional Ni-based catalysts used. Moreover, the modified hydrophobic catalyst exhibited a lower CO 2 selectivity compared with unmodified one. This study provides a new and promising insight for the design and development of high-calorie SNG product.
研究领域:
催化化学
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能源材料科学
✓ 已验证
DOI
高影响因子
ANALYST
·
2020
·Vol. 146
·期 3
·896-903
·
IF 3.978
Xiaolei Xie,Yufei Wang,Xiaobin Zhou,Junyang Chen,Mengke Wang,Xingguang Su
Single-atom nanozymes have drawn wide attention in bio-sensing for their remarkable merits such as low cost, high stability, and maximum atom utilization. Herein, a colorimetric strategy based on Fe–N–C single-atom nanozymes (Fe/NC-SAs) was established for the detection of alkaline phosphatase (ALP) activity. The Fe/NC-SAs prepared by pyrolysis have excellent peroxidase-like activity and can oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to a blue color product in the presence of hydrogen peroxide (H2O2). When ascorbic acid (AA) is added to the system, the blue color fades, and the absorbance has a linear relationship with the concentration of AA. Alkaline phosphatase (ALP) can catalyze the hydrolysis of ascorbic acid 2-phosphate (AAP) to produce AA. Thus, a strategy based on Fe/NC-SAs for the detection of ALP activity was established, which provided a linear range of 0.1–1.5 U L−1 and a limit of detection as low as 0.05 U L−1. Besides, Fe/NC-SAs showed high stability under harsh conditions. Moreover, an Fe/NC-SA-based assay was successfully validated using human serum samples for ALP determination with satisfactory results, and has broad prospects in the field of biosensing.
研究领域:
生物传感
·
医学检测
·
纳米材料
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Lulu Zheng,Siyu Gao,Shuaikang Yao,Yingjie Huang,Shangru Zhai,Jingai Hao,Xuemei Fu,Qingda An,Zuoyi Xiao
The development of novel materials for electrodes with high energy densities is essential to the advancement of energy storage technologies. In this study, N -doped layered porous carbon with ZIF-67-derived binary CoFe 2 O 4 -Fe particles was successfully fabricated by the pyrolysis of an Fe-based chitosan (CS) hydrogel mixed with ZIF-67 particles. Various characterization techniques were employed to assess the performance of the prepared porous CoFe 2 O 4 -Fe@NC composite. This composite exhibits excellent performance owing to the effective combination of multivalent CoFe 2 O 4 -Fe particles derived from ZIF-67 with N -doped porous carbon substances with a high surface area, which helps to accelerate ion and charge transfer. The specific capacitance of the CoFe 2 O 4 -Fe@NC composite carbonized at 700 °C reached 3960.9F/g at 1 A/g. When this composite is combined with activated carbon (AC) to construct an asymmetric supercapacitor (ASC), a density of energy of up to 84.9 W h kg −1 is attained at a power capacity of 291.6 W kg −1 . Moreover, this composite maintained a capacitance retention of up to 94.9 % after 10,000 cycles. This work offers new perspectives on high-performance supercapacitors and their applications.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Yuepeng Pang,Jing Wang,Zhiguo Zhou,Tao Yuan,Junhe Yang,Dalin Sun,Shiyou Zheng
Core-shell Fe 3 O 4 @Fe ultrafine nanoparticles (nano-Fe 3 O 4 @Fe, Fe 3 O 4 content 84 wt%) with a core (Fe) diameter of 5.1 ± 1.4 nm and a shell (Fe 3 O 4 ) diameter of 10.9 ± 1.6 nm is prepared by a liquid-phase pyrolysis and partial oxidation method. It is found that the core-shell Fe 3 O 4 @Fe ultrafine nanostructure can efficiently improve the electrochemical performance of Fe 3 O 4 as anode material for Li-ion batteries in terms of rate capability and cycle life. For instance, specific capacities of 884 and 705 mAh/g can be obtained for the nano-Fe 3 O 4 @Fe electrode after 100 cycles at 200 mA/g and 500 cycles at 1000 mA/g, respectively. It is believed that these improvements can be attributed to the significant shortened transfer distance of electrons and Li-ions with relatively low specific surface area, ultrahigh electronic conductivity inside the nanoparticles and good ductility to accommodate the asymmetric volume change.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Quan Huo,Gongquan Liu,Haihui Sun,Yanfei Fu,Yao Ning,Boyu Zhang,Xubiao Zhang,Jing Gao,Jiarun Miao,Xiaolin Zhang,Suyan Liu
CeO 2 /MIL-101(Fe) catalysts for a photocatalysis-extraction oxidation desulfurization (PEODS) system were designed by introducing different amounts of CeO 2 into MIL-101(Fe). And, the materials were further analyzed via some characterization technologies. Moreover, an optimization system, composed of CeO 2 /MIL-101(Fe), extractant acetonitrile and oxidant H 2 O 2 , was selected to remove dibenzothiophene (DBT) from model oil under visible-light irradiation. Evaluation results illustrated that 90% of DBT in oil phase was able to be transformed within 2 h as the adding amount of CeO 2 , the volume ratio of model oil to acetonitrile and the molar ratio of H 2 O 2 to DBT was 60 mg, 2:1 and 3:1, respectively. Radical scavenger experiments verified that · OH and · O 2 – were main reactive species in the process. The high photocatalytic activity was originated from a synergic effect produced between active sites of CeO 2 and active surface of MIL-101(Fe) and formed heterostructure in the catalyst, which broadened optical response ranges and facilitated photoinduced charge separations and transfers. Additionally, a convinced PEODS mechanism was proposed and rationalized.
研究领域:
环境化学
·
材料科学
·
催化化学
·
能源工程
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石油炼制
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光化学
·
纳米材料
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Manlu Wang,Juan He,Jin Luo,Jing Hu,Xiandeng Hou
The determination of inorganic arsenic species in real samples can be particularly challenging due to their trace levels and the interferences arising from sample matrix. Normally, the speciation analysis necessitates chromatographic separation. Herein, we report a novel method for the ultrasensitive detection and non-chromatographic speciation of inorganic arsenic by inductively coupled plasma mass spectrometry (ICP-MS), utilizing CdS/MIL-100(Fe) composites as an adsorbent and photocatalyst. The synthesized CdS/MIL-100(Fe) could completely adsorb As(V) and As(III) within 5 and 105 min, respectively. Following filtration and re-suspension in formic acid, the adsorbed As(III)/As(V) were reduced to arsine (AsH 3 ) under UV irradiation and swept to ICP-MS for detection. The limits of detection were found to be 1.7 ng L −1 (without preconcentration) and 0.11 ng L −1 (after 20-fold preconcentration). The method was successfully applied to the determination of trace inorganic arsenic in various food and water samples.
研究领域:
分析化学
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环境科学
·
食品科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 23
·期 58
·14597-14603
·
IF 5.317
Xinghua Chen,Fei He,Yanfei Shen,Yiran Yang,Hao Mei,Songqin Liu,Toshiyuki Mori,Yuanjian Zhang
Graphical Interface effect : A study into the intrinsic role of carbon supports for Fe-N/C alternatives to Pt/C catalysts for oxygen reduction in fuel cells revealed that when immobilized on suitable support, the Fe−N/C demonstrated an improved mass J K that was comparable to that of Pt/C and higher than most reported M−N/C catalysts (see scheme). The mass kinetic current density (mass J K ) of most extensively reported M−N/C catalysts (M represents non-precious metal elements such as Fe, Co, and Cu), a potential alternative to noble metal catalysts in fuel cells, is poorer than that of commercial Pt/C. Thus, deep understanding of the intrinsic roles of carbon supports may contribute to the development of M−N/C catalysts from a practical point of view. Herein, the routinely used carbon supports, i.e. carbon black (CB) and carbon nanotubes (CNT) that have different morphology and crystallinity, were investigated to uncover the factors that affected the mass J K of Fe−N/C in electrocatalytic oxygen reduction. When immobilized on CB, the ionic liquids-derived Fe−N/C exhibited an enhanced mass J K (4.45 A g −1 at 0.80 V vs. RHE) by a factor of 2.14 times, comparable to that of Pt/C (5.79 A g −1 ) and higher than most reported M−N/C catalysts to our best knowledge. In contrast, the CNT support system showed no improvement. It was revealed that a compatible interface between the Fe−N/C precursors and the carbon supports was vital to ensure in-situ growth of a uniform catalyst layer on the supports during pyrolysis. This subsequently promotes the mass J K by exposing more embedded active sites and introducing favorable slit pores for effective mass-diffusion. This work would be promising to address the long-term overlooked challenge of the low mass J K of M−N/C catalysts in replacing noble-metal catalysts for practical fuel cell applications.
研究领域:
材料科学
·
电化学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 41
·19506-19511
·
IF 6.97
Ying Li,Tong Liu,Wenxiu Yang,Zhijun Zhu,Yanling Zhai,Wenling Gu,Chengzhou Zhu
Non-Pt catalysts with excellent performance regarding the oxygen reduction reaction (ORR) have aroused enormous interest in recent years. Herein, we propose a dual-template method to synthesize a multiscale porous Fe–N–C (FeNC) catalyst. SiO2 and Zn are used as co-templates to produce a multiscale porous structure. Chitosan and glutaraldehyde are used as building blocks to fabricate the frameworks of the hydrogel. After lyophilization and annealing treatments, FeNC aerogel with a multiscale porous structure could be obtained. The as-prepared FeNC catalyst annealed at 900 °C (FeNC-900) exhibits a larger electrochemically active surface area and an improved ORR activity compared to FeNC annealed at other temperatures. FeNC-900 shows a superior ORR performance in comparison with that of commercial Pt/C in terms of the onset potential and half-wave potential, i.e., 0.959 and 0.837 V, which are 28 mV and 10 mV higher than those of Pt/C, respectively. Multiscale porosity is responsible for the outstanding ORR performance of FeNC-900. The electron transfer number of FeNC-900 for the ORR was calculated to be 3.95, which is comparable with that of Pt/C. In addition, the FeNC-900 catalyst possesses an excellent long-term duration and anti-poisoning capacity against methanol crossover. All these results endow the FeNC catalyst with tremendous potential for use in fuel cells.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xiaoyu Jia,Chenxu Zhang,Yongcai Zhang,Enren Zhang
In this study, Fe/N/Cs oxygen reduction reaction (ORR) catalysts with high specific surface area, catalytic activity were synthesized using legume biomass with different protein content. The catalytic activity of the Fe/N/C catalysts was confirmed to be related to the protein content of the biomass precursor by characterization and electrochemical tests. The catalysts (named as Fe/N/C-T) from lactone tofu have the highest N/C ratio related to ORR, and the air-cathode loaded with Fe/N/C-T catalysts exhibited the best ORR performance in linear sweep voltammetry (LSV) tests, which was comparable to that of commercial Pt/C catalysts. MFCs with AC(Fe/N/C-T) air-cathode produced a maximum power density of 0.486 mW cm −2 , higher than Pt/C (0.437 mW cm −2 ) with the same loading. In addition, the Fe/N/C-T catalyst demonstrated high stability and resistance to toxicity in long-term operation, which can be an alternative to commercial Pt/C.
研究领域:
环境科学
·
材料科学
·
生物工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 31
·14756-14771
·
IF 4.682
Cai Menglu,Wang Xiaozhong,Cao Wenhui,Chen Yingqi,Dai Liyan
A fine-tuned mordenite was prepared to overcome the low selectivity of tert-amyl anthracene production in the direct alkylation of anthracene. Herein, a series of boric acid-modified Fe-Zr mordenite materials were prepared, and tert-amyl anthracene was smoothly and efficiently obtained over these catalysts. The boron sites in modified catalyst promoted the alcohol dehydrogenation, which benefited the reaction conversion. Moreover, the existence of Brønsted and Lewis acid sites was the key in alkylation reaction, making 1.0B-Fe-Zr/MOR good reactivity (Conv. 47.8%, Sel. 91.4%). Calculated results correlated the products properties with catalyst structures, verifying that boric acid-modified Fe-Zr/MOR was a successful shape-selective catalyst. The present work opens a new frontier for a sustainable and high-selective method to process anthracene alkylation. Graphical abstract
研究领域:
催化化学
·
材料科学
·
有机合成
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Shumin Li,Jun Tan,Zhejun Jiang,Jin Wang,Zhengquan Li
Dye-sensitized systems show promising in photocatalysis because they can separate the tasks of light absorption, charge generation and surface catalysis to two coupled components. In this system, it is crucial to develop suitable catalysts capable of receiving dye-injected charges and having high activity to a given reaction. Aiming to photocatalytic H 2 and O 2 production, we present a metal-organic framework derived route to prepare bimetallic Fe-Ni-P nanotubes using Fe-Ni-MIL-88 nanorods as templates. When integrated with different dyes, these Fe-Ni-P nanotubes can serve as efficient catalysts for photocatalytic H 2 and O 2 production, respectively. Additionally, catalytic activities of such dye-sensitized systems can be conveniently regulated by tailoring the metal compositions in Fe-Ni-P nanotubes. The photocatalytic H 2 production of Fe 1 -Ni 2 -P can reach 5420 μmol g cat −1 h −1 under eosin-Y sensitization, which is 24 times and 6.7 times higher than Fe 2 P and Ni 2 P, respectively. The photocatalytic O 2 production of Fe 1 -Ni 2 -P can reach 900.3 μmol g cat −1 h −1 under [Ru(bpy) 3 ]Cl 2 sensitization, about 4.6 times and 2.9 times higher than Fe 2 P and Ni 2 P. The roles of different components in the system have been explored and corresponding working mechanism is proposed. This work demonstrates a new type of dye-sensitized systems consisting of bimetallic phosphides and provides a facile route to regulate their photocatalytic performance.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）