JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
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IF 6.1
Wei Rong,Meili Ding,Pan Ma,Suyu Kong,Jianfeng Yao
Accumulation of atmospheric CO 2 poses a serious threat to the global environment, but there is still a lack of effective CO 2 catalytic conversion under mild conditions. Herein, multifunctional ZnO/N-doped porous carbon materials, ZNPC-X, were fabricated by pyrolysis of available pine pollen with melamine and zinc chloride . The optimized ZNPC-600 produced at 600 °C can work as an efficient photothermal catalyst towards CO 2 cycloaddition conversion with a high catalytic yield of 99% under mild conditions (0.3 W/cm 2 , 1 bar). Moreover, ZNPC-600 shows excellent recyclability after ten cycles and desirable performance even under simulated flue gas and after moisture treatment. Absorption spectra and time-dependent infrared images unveil that the intrinsically broad light absorption and high photothermal conversion efficiency are the major reasons for the high activity of ZNPC-600. Besides, photogenerated electrons can be transferred to CO 2 and activate it, while photogenerated holes can be used as Lewis acid to facilitate the ring opening of epoxides. In addition, the hierarchical pore structure and the synergy between ZnO and pyridine N also play a role in the mass transfer and activation of epoxides and CO 2 , respectively. This work provides a low-cost and facile solution to obtain catalysts derived from biomass for promoting CO 2 conversion.
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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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
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IF 9.4
He Zhou,Dezhi Kong,Ningning Chu,Hui Wang,Jie Xu,Ye Wang,Tingting Xu
The development of sustainable energy technologies relies on the exploitation of efficient and durable electrocatalysts for water splitting at high current densities. Our work presents a novel bifunctional catalyst, denoted as NM@NC/CC, which combines the benefits of NiSe 2 -MoSe 2 heterojunctions with nitrogen-enriched porous carbon derived from metal-organic frameworks (MOFs). The integration of these components is designed to harness their combined advantages, which include enhanced electron transfer, improved mass and gas evolution dynamics, and an increased number of catalytically active sites. These features collectively optimize the energetics for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). As a result, the catalyst facilitates rapid kinetics for the overall water-splitting process. The NM@NC/CC demonstrates low overpotentials, requiring only 91 mV for the HER and 280 mV for the OER to reach a current density of 10 mA cm −2 . Even at higher current densities of 100 mA cm −2 for HER and 50 mA cm −2 for OER, the overpotentials are only 159 mV and 350 mV, respectively. Additionally, a two-electrode setup using this catalyst achieves a current density of 10 mA cm −2 with a minimal cell voltage of 1.56 V. The insights gained from this study will contribute to the advancement of electrocatalysts for energy conversion technologies.
研究领域:
材料科学
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能源转换技术
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电催化
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产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2020
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IF 0
Hao Zhang,Xiaojing Song,Chen Zhao,Dianwen Hu,Wenxiang Zhang,Mingjun Jia
Designing highly efficient heterogeneous catalysts for the Friedel–Crafts acylation (FCA) reaction is a very significant subject for the development of green chemical industry. Herein, a series of nanosized iron carbide-encapsulated N-doped porous carbons (FexC/NC-n) have been prepared through high-temperature pyrolysis of the Fe-Zn bimetallic organic framework for the catalytic application in FCA of aromatic compounds with acyl chlorides. A variety of characterization results demonstrated that the nanosized iron carbides (FexC), which are wrapped inside of the graphitic carbon shell, are the main active sites for the FCA reaction. Changing the ratios of Fe/Zn can considerably influence the particle size of FexC and the thickness of the graphitic carbon shell. The composition-optimized catalyst, named as FexC/NC-0.05, exhibited the highest activity and excellent recyclability for the reaction. The relatively thin graphitic carbon shell allows rapid penetration of reagents and, meanwhile, can also provide effective protection for the active FexC particles against leaching by space confinement and electronic effects, thus resulting in the formation of highly active and stable FexC/NC-n catalysts for the FCA reaction.
研究领域:
材料科学
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催化化学
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绿色化学工程
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产品关联
DOI
CHEMOSPHERE
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2019
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IF 5.108
Xin Ning,Yuhan Sun,Heyun Fu,Xiaolei Qu,Zhaoyi Xu,Shourong Zheng
Metal-organic frameworks (MOFs) have received significant attention as promising precursors or sacrificial templates in the preparation of porous carbon supported catalysts. In this study, N-doped porous carbon supported Ni catalysts (denoted as Ni/NC) were prepared using furfuryl alcohol (FA) loaded Ni-MOF-74 as the precursor followed by NH 4 OH treatment and pyrolysis under N 2 atmosphere. For comparison purpose, Ni catalysts supported on porous carbon (denoted as Ni/C) were also prepared by direct pyrolysis of Ni-MOF-74. The selective gas phase catalytic hydrodechlorination of 1,2-dichloroethane to ethylene was carried out to evaluate the catalytic performances of the catalysts. It was found that for Ni catalysts prepared at the same pyrolysis temperature, Ni particle sizes in Ni/NC catalysts were significantly smaller (20–40% smaller) than that of Ni/C. This reflected that pre-modification of Ni-MOF-74 using FA and NH 4 OH could effectively increase Ni dispersion in Ni catalysts derived from Ni-MOF-74. Moreover, Ni/NC had a markedly stronger ability to form spillover H 2 owing to the enhanced metal-support interactions by N-doping. Accordingly, Ni/NC catalysts exhibited much higher catalytic activities than Ni/C catalysts. The turnover frequencies of Ni/NC catalysts were found to be 1.22–1.65 times higher than Ni/C catalysts. Increasing pyrolysis temperature led to decreased catalytic activities of both Ni/C and Ni/NC catalysts, due to the aggregation of Ni particles at higher treatment temperature. The findings from this study demonstrate that the MOF-mediated synthesis method offers a promising way to prepare Ni-based catalysts for catalytic hydrodechlorination of chlorinated hydrocarbons .
研究领域:
化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 29
·期 1
·146
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IF 4.6
Zitao Yang,Cunhao Luo,Ning Wang,Junshao Liu,Menglong Zhang,Jing Xu,Yongnan Zhao
The high power density and long cyclic stability of N-doped carbon make it an attractive material for supercapacitor electrodes. Nevertheless, its low energy density limits its practical application. To solve the above issues, Fe2O3embedded in N-doped porous carbon (Fe2O3/N-PC) was designed by pyrolyzing Hemin/activated carbon (Hemin/AC) composites. A porous structure allows rapid diffusion of electrons and ions during charge–discharge due to its large surface area and conductive channels. The redox reactions of Fe2O3particles and N heteroatoms contribute to pseudocapacitance, which greatly enhances the supercapacitive performance. Fe2O3/N-PC showed a superior capacitance of 290.3 F g−1at 1 A g−1with 93.1% capacity retention after 10,000 charge–discharge cycles. Eventually, a high energy density of 37.6 Wh kg−1at a power density of 1.6 kW kg−1could be delivered with a solid symmetric device.Keywords:Hemin/AC;Fe2O3/N-PC;pseudocapacitance;quasi-solid-state supercapacitor
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Qingsong Zhang,Qimou Deng,Yaoyao Zhang,Yang Xiao,Chunlei Zhang,Haiyi Gong,Qingming Zeng,Qingyan Zhang,Qingyi Zeng
Unavoidable organics in uranium wastewater or contaminated waters derive great challenges to traditional uranium removal techniques. Here, a drivingpower enhanced photocatalytic fuel cell (DEPFC) is designed by using a carbon felt (CF)-based UiO-66-NH 2 derived zirconia (ZrO 2 )/N-doped porous carbon (ZrON-C/CF) cathode and a monolithic photoanode, composing of a front FTO glass-based BiVO 4 film and a rearmounted Si photovoltaic cell, for effectively oxidizing organics and simultaneously reducing UO 2 2+ from complex wastewater under sunlight illumination. The water contact angle measurements demonstrate that ZrO 2 can improve the hydrophilia of cathode thus increases the contact between UO 2 2+ and cathode. The density functional theory indicates that N-doping can enhance the electronegativity of cathode and increases UO 2 2+ adsorption. Meanwhile, the enhanced UO 2 2+ reduction facilitates the charge separation in BiVO 4 film, therefore enhancing the organic oxidation. Consequently, under AM 1.5 illumination, the designed DEPFC can remove almost 100% of UO 2 2+ and simultaneous degrade 99% organics within 40 min
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
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2024
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IF 4.3
Fenghai Zhou,Wei Li,Junjie Ma,Shaocong Wang,Mingjun Lu,Zheng Liu,Guo-Cheng Han
N-doped porous carbon material (N-PC) was generated through high-temperature cracking, using ZIF-8 as a template, and preparation of Na 3 V 2 (PO 4 ) 2 F 3 /N-PC composites were designed and prepared as cathode materials for sodium-ion batteries, and the electrochemical sodium storage performance was systematically investigated. The physical characterization results showed that the addition of N-PC played a role in increasing the electrical conductivity of Na 3 V 2 (PO 4 ) 2 F 3 material and improving the specific surface area. The electrochemical test results showed that the discharge specific capacity of Na 3 V 2 (PO 4 ) 2 F 3 /N-PC composite was 109.56 mAh/g at 0.1C, and the capacity retention rate was 85.10 % after 100 cycles, and the R SEI of Na 3 V 2 (PO 4 ) 2 F 3 /N-PC composite (81.55 Ω) is better than that of Na 3 V 2 (PO 4 ) 2 F 3 pure-phase material (142.5 Ω), which indicates that the ion transfer impedance of the modified material has been effectively reduced, and the ion de-embedding is more fluent.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
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2018
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IF 0
Fengwei Zhang,Chunlan Ma,Shuai Chen,Jianfei Zhang,Zhihong Li,Xian-Ming Zhang
Chemoselective hydrogenation of quinolines is often subjected to the problems of leaching and poisoning of catalytic active site as well as harsh reaction conditions. Developing a novel and high-performance heterogeneous catalyst is of paramount importance yet a huge challenge. Herein, we report a facile and efficient strategy for preparing the large surface area and highly N-doped hierarchical porous carbon anchored tiny Pd NPs catalyst, in which the low-cost chitosan, nitrogen-rich ionic liquids are served as composite precursors and KZ molten salt as friendly pore-forming agent. And a series of Pd@CIL-T (C refers to chitosan, IL refers to ionic liquid, T = 600–900 °C) catalysts are successfully fabricated via pyrolyzing aforesaid composites at different temperatures followed by anchoring the highly dispersed and small-sized Pd NPs on their surface. Among all the prepared catalysts, Pd@CIL-900 exhibits the optimal catalytic performance towards the selective hydrogenation of quinoline under extremely mild conditions (0.6 mol% Pd, 0.1 MPa H 2 and 50 °C). The kinetic experiments further reveal that such hydrogenation is subject to a pseudo-first order reaction and the apparent activation energy is as low as 41.1 kJ/mol, demonstrating excellent hydrogenation reaction rate. Moreover, the catalytic activity and selectivity are well maintained even after being reused for fifth reaction cycles.
研究领域:
化学
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催化材料
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纳米技术
✓ 已验证
DOI
CARBON
·
2022
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IF 11.307
Bo Jiang,Wang Yang,Hengxuan Bai,Chaonan Wang,Chong Xu,Zhengxuan Li,Lu Yan,Chengxiao Zhang,Ni Wu,Sai Che,Xiaobai Wang,Yongfeng Li
The challenge of realizing low filler loading and high-performance microwave absorbing (MA) materials is still an urgent issue to be solved. Herein, porous N-doped carbon wrapped Fe/Fe 5 C 2 (Fe/Fe 5 C 2 @NC) nanocomposite is successfully synthesized by a facile one-step calcination of carbon nitride and ferrocene precursors. The magnetic Fe/Fe 5 C 2 nanoparticles are tightly and uniformly anchored on the wrinkled carbon nanosheets . Abundant of voids exist between the three-dimensional conductive carbon network, which can result in a low density and a strong interfacial polarization relaxation with effect. Based on the double attenuation mechanisms of dielectric loss and magnetic loss, the optimized Fe/Fe 5 C 2 @NC-800 possesses a minimum reflection loss value reaching −63.1 dB and an effective absorption bandwidth (EAB) as broad as 7.3 GHz with an extremely low filler loading of 4 wt%. The Fe/Fe 5 C 2 @NC-800 can even achieve a broad EAB within 4.5–18.0 GHz by tuning the absorber thickness in the range of 2.5–5.0 mm, covering nearly 85% of the whole measured frequency band. This work provides new insights for the development of advanced lightweight MA materials, which has wide effective absorption frequency range and strong absorption intensity at low filling levels.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Huanran Liu,Qinyan Yang,Chen Wang,Yang Wu,Li Liu,Guoqing Shen,Qincheng Chen
Microbial fuel cells (MFCs) offer great potential for simultaneous wastewater treatment and energy generation, yet the development of cost-effective and efficient carbon-based cathode alternatives to Pt/C for oxygen reduction reactions remains challenging. This study presents a novel single-atom Fe-decorated N-doped porous carbon (Fe-SA/NBC) synthesized from biogas residue for wastewater treatment. The Fe-SA/NBC demonstrated superior catalytic performance, achieving a kinetic current density of 18.89 mA·cm - ² compared to 10.38 mA·cm - ² for Pt/C, and an enhanced electrochemical surface area with a C dl of 1.81 mF·cm - ² versus 1.76 mF·cm - ² for Pt/C. When integrated into an MFC air-cathode under actual sewage, Fe-SA/NBC outperformed Pt/C, achieving a 22.6 % higher power density (882.92 mW·m - ² vs. 719.81 mW·m - ²), a higher output voltage (0.53 V vs. 0.47 V), and a longer operational duration (3.6 days vs. 3.2 days). Additionally, Fe-SA/NBC exhibited superior removal efficiencies for chemical oxygen demand and ammonia nitrogen during sewage treatment. In practical applications, MFCs equipped with Fe-SA/NBC successfully powered diodes and timers in series-connected configurations. This study introduces an innovative method for producing cost-effective and efficient cathode catalysts from waste biomass, offering significant potential for wastewater treatment and power generation systems.
研究领域:
环境科学
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材料科学
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生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Tingyu Dai,Jin Huang,Wei Han,Youwei Chen,Taoyu Meng,Wenli Zhou,Zhou Xu,Maolong Chen,Li Wen,Yunhui Cheng,Libing Wang,Li Ding
In this work, a novel porous carbon nanocomposite was successfully prepared by creatively using polyacrylic acid to modify N-doped porous carbon, which was used to adsorb and remove new cyclic chlorine disinfection by-products in various water environments. The high-temperature calcination process at 1000 °C created a hierarchical pore structure that contained both micropores and mesopores. This structure significantly increased the mass transfer efficiency of the target on the adsorbent. The incorporation of N atoms enhanced NC's binding affinity and furnished target adsorption sites. The dispersion of N-doped porous carbon was significantly improved after polyacrylic acid modification. Moreover, the surface charge of NC-1000 was also altered, facilitating easier electrostatic interaction with DBPs. Subsequently, faster adsorption kinetics was obtained within 2 min, and the removal efficiency of 2,4-dichlorophenol (2,4-DCP) and 2,4,6-trichlorophenol (2,4,6-TCP) were promoted to 94.10 % and 98.71 %, respectively. Characterization and data analysis revealed that the primary adsorption mechanism was chemical (electrostatic interaction, hydrophobic interaction, π-π interaction, and hydrogen bond). Surprisingly, factors such as ionic strength, natural organic matter and pH had minimal impact on the adsorption process, indicating that NC-1000@PAA had excellent anti-interference performance. Despite undergoing four adsorption–desorption cycles, NC-1000@PAA upheld a steady composition along with a remarkable adsorption capability. Furthermore, NC-1000@PAA had negligible cytotoxicity, which was assessed by cell experiments. The application of NC-1000@PAA was attested in various environmental waters. The proposed method provided a new strategy to pollutant removal by NC-1000@PAA under extensive conditions, which had wide perspective and practicability on the purification treatment of environmental water.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2017
·
IF 6.337
Jingyan Liu,Yang Liu,Peng Li,Luhai Wang,Haoran Zhang,Hui Liu,Jialiang Liu,Yixian Wang,Wei Tian,Xiaobo Wang,Zhongtao Li,Mingbo Wu
Fe-N-doped porous carbon derived from petroleum asphalt (NPCA) was prepared via a facile template synthesis method, with urea as nitrogen source while α-Fe 2 O 3 nanoparticles as template and Fe source. The as-prepared NPCA calcined at 900 °C (NPCA-900) exhibits excellent electrocatalytic performance with high diffusion-limiting current density and stability comparable to those of commercial Pt/C catalysts in alkaline environment . The remarkable ORR performance of NPCA could be ascribed to the abundant porosity, large specific surface area (1060 m 2 g −1 ), as well as the doping of Fe-N (especially pyridinic N). The NPCA derived from cheap petroleum asphalt has good application future in the field of catalysis, while it may pave a new way to realize the clean and high value utilization of heavy oils.
研究领域:
材料科学
·
能源化学
✓ 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）