INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
·
IF 3.8
Zhenfei Wang,Congli Li,Lei Tang,Jiahui Yang,Qi Shi,Jinxiang Dong
Ni-MOF-74 is among the most promising candidates for CO adsorption due to its highest CO adsorption capacity. However, the feasibility of using Ni-MOF-74 in actual CO/N2 pressure swing adsorption (PSA) processing cannot be reliably inferred based solely on its adsorption capacity at normal temperature and pressure. Hence, we systematically studied its CO working capacity and regenerability at different test temperatures and pressure ranges by single-component static and binary-component dynamic (CO/N2, 50%/50% and 30%/70%, v/v) experiments. The static experiments preliminarily indicated an appropriate operating temperature of 100 °C with adsorption–desorption pressures in the range of 3.0–0.1 bar for the PSA process. The working capacity and regenerability of CO were evaluated as 3.41 mmol·g–1 and 66.21% (adsorption–desorption pressure: 3.0–0.1 bar, 100 °C). A higher temperature reduces the binding force between CO and Ni-MOF-74, so that more CO is desorbed, which leads to an increase in the working capacity and regenerability of CO. Furthermore, through CO/N2 binary-component dynamic breakthrough experiments, the optimal operating temperature and CO adsorption partial pressure for the PSA process were determined as 100 °C and 1.5 bar at a total desorption pressure of 0.2 bar. Typically, for a CO/N2 composition of 50%/50%, the CO working capacity and regenerability were 2.66 mmol·g–1 and 85.25% at 100 °C and a CO partial pressure of 1.5 bar (total CO adsorption pressure of 3.0 bar) at a total desorption pressure of 0.2 bar. These results may guide PSA process design and optimization for adsorbents with strong CO binding ability.
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DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Liuliu Wang,Shiqing Xuan,Songwu Chen,Wenxia Mo,Linhan He,Xiaoling Liu
Against the backdrop of escalating research on biomass-derived porous carbons for thermal energy storage, where the carbonization atmosphere profoundly dictates pore architecture and functional performance. This study systematically investigates the roles of CO 2 activation and N 2 pyrolysis in tailoring bamboo shoot shell (BSS)-derived porous carbons for polyethylene glycol (PEG)-based phase change materials (PCMs). CO 2 activation at 900 °C induced hierarchical porosity (specific surface area: 567.1 m 2 /g, average pore width: 2.17 nm), achieving a 60.47 % PEG encapsulation efficiency. However, the confined pore structure impeded PEG molecular mobility, increasing non-isothermal crystallization activation energy (ΔE a = −160.16 kJ/mol) and prolonging half-crystallization time. In contrast, N 2 -pyrolyzed carbon (NCB) retained minimal porosity (15.2 m 2 /g) but higher graphitization, serving as efficient nucleation sites to reduce ΔE a (−153.44 kJ/mol) and enhance photothermal conversion efficiency (87.4 % compared to 85.6 % for CO 2 -activated composites). Both composites exhibited leak-proof stability and thermal cyclability. This innovation bridges waste-to-energy solutions with renewable energy technologies, expanding the applicability of PCM-based systems in solar thermal devices.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
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IF 9
Zewen Xu,Pei Li,Hao Guo,Hao Yang,Deqing Shi,Xinliang Liu,Ming Wang,Yingfei Hou
Efficient membrane-based carbon capture is a key front-end technology for achieving carbon neutrality. Crystalline carbon materials offer advantages such as high mechanical strength and a high degree of structural regularity, and are often used as fillers in the fabrication of mixed matrix membranes (MMMs). However, they tend to undergo π–π stacking and aggregation, leading to the formation of non-selective defects within the membrane. In this work, amorphous carbon material Ketjen black (KB) was deeply aminated via a diazonium-induced anchoring process (DIAP) and employed as a nanofiller to fabricate CO 2 -philic and aging-resistant PIM-based MMMs. TEM characterization confirmed that amino groups were successfully grafted onto both the surface and the internal pores of KB. Experimental results and molecular dynamics simulations revealed that the introduced amino groups enhanced the interaction energy between the filler and the polymer chains, thereby improving the compatibility between the inorganic and organic phases and significantly boosting the membrane's aging resistance. Additionally, the amino groups served as CO 2 -affinitive sites, effectively increasing the CO 2 /N 2 selectivity. The incorporation of uniformly sized amorphous carbon nanoparticles increased the fractional free volume of the membrane without introducing non-selective defects, thus improving the CO 2 permeability. Under optimized conditions, the resulting MMM exhibited a CO 2 permeability of 9024 Barrer and a CO 2 /N 2 selectivity of 23.7, exceeding the Robeson upper bound. After 180 days of aging, the CO 2 permeability decreased by only 16.9 %, demonstrating excellent long-term performance and offering a new paradigm for the application of amorphous carbon materials in PIM-based membranes for carbon capture.
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高影响因子
Nature Chemistry
·
2024
·
IF 19.2
Zhang Yangyu,Peng Xuanbei,Tian Han-Rui,Yang Bo,Chen Zuo-Chang,Li Jiejie,Zhang Tianhua,Zhang Mingyuan,Liang Xiaocong,Yu Zhiyang,Zhou Yanliang,Zheng Lirong,Wang Xiuyun,Zheng Jian-Wei,Tang Yu,Au Chak-tong,Jiang Lilong,Xie Su-Yuan
Developing highly effective catalysts for ammonia (NH 3 ) synthesis is a challenging task. Even the current, prevalent iron-derived catalysts used for industrial NH 3 synthesis require harsh reaction conditions and involve massive energy consumption. Here we show that anchoring buckminsterfullerene (C 60 ) onto non-iron transition metals yields cluster-matrix co-catalysts that are highly efficient for NH 3 synthesis. Such co-catalysts feature separate catalytic active sites for hydrogen and nitrogen. The ‘electron buffer’ behaviour of C 60 balances the electron density at catalytic transition metal sites and enables the synergistic activation of nitrogen on transition metals in addition to the activation and migration of hydrogen on C 60 sites. As demonstrated in long-term, continuous runs, the C 60 -promoting transition metal co-catalysts exhibit higher NH 3 synthesis rates than catalysts without C 60 . With the involvement of C 60 , the rate-determining step in the cluster-matrix co-catalysis is found to be the hydrogenation of *NH 2 . C 60 incorporation exemplifies a practical approach for solving hydrogen poisoning on a wide variety of oxide-supported Ru catalysts.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Wenbin Ruan,Jianli Chen,Shijian Zhang,Xiuxiu Huang,Xiang Li,Shuangshuang Huai,Congliang Cheng,Mingxuan Qu,Hewen Liu,Xiufang Wang,Ping Li
Here, the Bi 24 O 31 Br 10 -based composite photocatalysts modified by bimetallic Bi and Mo nanoparticles (NPs) are designed and prepared (Bi-Mo-Bi 24 O 31 Br 10 ). 2D ultra-thin Bi 24 O 31 Br 10 nanosheets with suitable band gap and good chemical and optical stability are selected as the main catalyst to drive N 2 fixation by generating hot carriers. The Bi NPs in the Bi 24 O 31 Br 10 nanosheets serves as a buffer tank for electrons to improve the efficiency of electron transfer. Meanwhile, the Mo NPs serve as catalytic centers for N 2 adsorption and activation, working synergistically to enhance the overall reaction efficiency. Resulting from semiconductor-to-metal −to-metal electron transfer path and the Mo metal adsorption and activation mechanism, the nitrogen fixation rate of the Bi-Mo-Bi 24 O 31 Br 10 photocatalyst is as high as 191.2 μmol g −1 h −1 , and it is 7.2 times compared to pure Bi 24 O 31 Br 10 . This work creates a novel framework for the rational design of highly efficient visible-light-responsive nitrogen fixation catalysts.
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高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Pengfei Song,Li Kang,Hao Wang,Rong Guo,Rongmin Wang
The electrocatalytic conversion of nitrogen gas at ambient conditions represents a novel approach for ammonia synthesis to the sustainable society. It is critical to understand the detailed pathways and mechanisms of this promising process to develop a highly efficient catalyst. Herein, the N, P co-doping carbon (NP-C-MOF-5) catalyst was prepared for electrocatalytic N2 reduction in acid electrolytes under ambient temperatures and pressures. Experimental results showed that there are two products including NH3 and N2H4·H2O on the NP-C-MOF-5 cathode at −0.1 V versus RHE with the yield of 1.08 and 5.77 × 10–4 μg h–1 mgcat.–1, respectively. Moreover, an electrocatalytic pathway on NP-C-MOF-5 was investigated by the electrochemical in situ Fourier transform infrared technique. The results confirmed the formation of N2Hy (1 ≤ y ≤ 4) intermediates on NP-C-MOF-5 cathode surfaces, suggesting an associative pathway for the N2 reduction reaction.
研究领域:
材料科学
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化学工程
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环境科学
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高影响因子
ACS Applied Materials & Interfaces
·
2018
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IF 8.097
Changshui Tian,Wenlong Sheng,Heng Tan,Hong Jiang,Chunrong Xiong
In the past decades, enormous efforts have been made to synthesize photocatalysts for N2 conversion driven by visible light. However, it is still a major challenge to develop an efficient photocatalyst. In this paper, monodoped and codoped TiO2 nanofibers were fabricated by vapor-phase growth. Vapor-phase implantation of the guest atoms into TiO2 nanofibers may greatly prolong the lifetime of electron–hole pairs. The doped TiO2 nanofibers were demonstrated to be an excellent photocatalyst for nitrogen photofixation under a 300 W Xe-lamp irradiation. The amount of ammonia produced over the Fe, V codoped TiO2 nanofibers reached 14 783 μmol/L·g-cata after irradiation for 2 h. The strategy could be easily extended to prepare other species doped TiO2 nanofibers as high-efficiency photocatalysts.
研究领域:
材料科学
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化学工程
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环境科学
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高影响因子
RSC Advances
·
2019
·Vol. 9
·期 68
·39914-39923
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IF 3.049
Cheng Qian,Yefei Wang,Zhen Yang,Zhengtian Qu,Mingchen Ding,Wuhua Chen,Zhenpei He
The in situ N2 generation technique is a promising method for enhancing oil recovery (EOR) and blockage removal. Conventionally, N2 is generated through the redox reactions of sodium nitrite (NaNO2) and ammonium chloride (NH4Cl). The effect of several parameters on N2 production was studied in this work. The reaction kinetics between NaNO2 and NH4Cl were developed. The results revealed that the optimal molar ratio was 1 : 1 for the reactants and a higher concentration of reactants, H+ and higher temperature would lead to an increase in the gas production volume and a better gas-generating efficiency. The kinetic equation of the N2 generation reaction was defined as dc/dt = −7.103 × 107 cH+1.3291c02.0949e(−51.28 kJ mol−1)/RT. Methyl formate, ethyl formate, ammonium persulphate as well as paraformaldehyde were selected as authigenic acids by measuring their pH values and their effect on the rate of gas-generation, and the gas production volume was studied. An energy enhancement experiment was conducted to examine the influence of reactant concentration, initial pressure and different authigenic acids on energy enhancement and gas-generating efficiency. The results showed that the increase in reactant concentration can improve the energy enhancement while neither the reactant concentration nor the initial pressure could hardly influence the gas-generating efficiency. The presence of authigenic acids can considerably enhance both the gas production volume and the gas-generating efficiency of the system. The ammonium persulphate assisted N2 generation system is considered to be suitable for field applications.
研究领域:
石油工程
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化学工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Yingying Chen,Bo Ouyang,Xianbiao Li,Wei Liu,Bowen Yang,Peixiang Ning,Qiuying Xia,Feng Zan,Erjun Kan,Jing Xu,Hui Xia
Solid-state lithium batteries (SSBs) have been widely researched as next-generation energy storage technologies due to their high energy density and high safety. However, lithium dendrite growth through the solid electrolyte usually results from the catastrophic interface contact between the solid electrolyte and lithium metal. Herein, a gradient nitrogen-doping strategy by nitrogen plasma is introduced to modify the surface and subsurface of the garnet electrolyte, which not only etches the surface impurities (e.g., Li2CO3) but also generates an in situ formed Li3N-rich interphase between the solid electrolyte and lithium anode. As a result, the Li/LLZTON-3/Li cells show a low interfacial resistance (3.50 Ω cm2) with a critical current density of about 0.65 mA cm–2 at room temperature and 1.60 mA cm–2 at 60 °C, as well as a stable cycling life for over 1300 h at 0.4 mA cm–2 at room temperature. A hybrid solid-state full cell paired with a LiFePO4 cathode exhibits excellent cycling durability and rate performance at room temperature. These results demonstrate a rational strategy to enable lithium utilization in SSBs.
研究领域:
材料科学
·
能源存储技术
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PubMed
高影响因子
Materials
·
2026
·Vol. 19
·期 4
·753
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IF 3.7
Ziyang Yang,Xicheng Sun,Wenhui Yuan,Li Li
Highlights What are the main findings? A green acid-free route produces MIL-101/GO-0.1, enabling superior C 3 F 8 capture. The content of graphene oxide affects the adsorption properties of the composite material. MIL-101/GO-0.1 achieved a record-breaking IAST separation selectivity of 17,069 for C 3 F 8 /N 2 . What are the implications of the main findings? Overcome the current technical bottleneck of low C 3 F 8 adsorption capacity. Green synthesis coupled with high adsorption capacity opens up possibilities for industrial applications. This provides insights for future research into the adsorption and separation of C 3 F 8 . As a perfluorinated compound with a high global warming potential, octafluoropropane (C 3 F 8 ) needs to be efficiently separated from industrial waste gas, but separating it from nitrogen at low concentrations is highly challenging. To address the common drawback of using corrosive acids in conventional MIL-101(Cr) synthesis, this study developed a green, acid-free solvothermal method for preparing graphene oxide (GO)-modified MIL-101(Cr) composites (MIL-101/GO). By systematically varying the GO doping, the optimal composite (MIL-101/GO-0.1) exhibited breakthrough adsorption performance: its equilibrium adsorption capacity for C 3 F 8 reached 210 mg/g in fixed-bed breakthrough experiments. The predicted C 3 F 8 adsorption selectivity relative to N 2 reached 17,069, ranking among the highest values reported for adsorbents, indicating a significant performance enhancement over the pristine MIL-101(Cr). Mechanistic analysis reveals that graphene oxide not only increases specific surface area and micropore volume but also enhances dispersion forces, substantially boosting affinity for C 3 F 8 . Additionally, the composite exhibits outstanding cycling stability and thermal stability. This study provides a novel eco-friendly synthetic strategy for high-performance metal–organic frameworks and offers a highly promising candidate material for industrial-scale fluorocarbon recovery.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Weixiang Chen,Yuxiong Wang,Yaoyu Zhang,Yue Liu,Zhongbiao Wu
Ammonia (NH 3 ) has emerged as a promising zero‑carbon energy source for energy and transportation. However, its utilization leads to the emission of NH 3 , which contributes to PM 2.5 formation and disrupts the global nitrogen cycle. Selective catalytic oxidation (SCO) represents a mainstream technology for NH 3 treatment, yet achieving both sufficient activity and high N 2 selectivity across a broad temperature window remains challenging. Here, a core-shell Pt@Cu-ZSM-5 catalyst was employed for NH 3 catalytic abatement by encapsulating metallic Pt clusters (Pt 0 ) inside the channels of Cu ion-exchanged ZSM-5. The optimal sample achieved a complete NH 3 conversion below 250 °C and maintained over 92% N 2 selectivity from 250 to 500 °C due to the synergism between the Pt Cu dual sites. Mechanistic studies revealed that NH 3 oxidation preferentially occurred on Pt 0 sites with excellent redox capacity to produce N 2 O and NO x at relatively low and high temperatures, respectively. And the presence of Cu ions (Cu δ+ ) could efficiently both inhibit the formation of N 2 O on Pt 0 sites and reduce NO x emission, thereby improving the N 2 selectivity. At relatively low temperatures, NH 3 -solvated Cu + (NH 3 ) 2 could migrate to the adjacent Pt sites and reduce the adsorbed NO* species from NH 3 oxidation, damping the formation of N 2 O. At high temperatures, the NO and NO 2 emitted from Pt 0 sites could be reduced on Cu δ+ sites via a typical selective catalytic reduction. This study provides new insights into the rational design of bifunctional SCO catalysts and offers a comprehensive understanding of the synergistic effects in Pt Cu dual-site systems.
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PubMed
高影响因子
FUEL
·
2021
·
IF 6.609
Zhang Qian,Lu Wei,Wu Mingyue,Qi Guansheng,He Zhenglong,Li Jinliang
To solve the environmental problems caused by greenhouse gas emissions, a type of oxidized nanocellulose (NC)@chitosan (CS)@silica sol (Sol) gel foam based on electrostatic interactions was obtained by simple blending and freeze drying. The self-assembly process was driven by electrostatic forces between the negatively charged NC and Sol and positively charged CS. The gas adsorption properties of the gel foams under various ratios of constituents were studied by orthogonal experiments. The gel foam had a good adsorption capacity for CO 2 at 30 °C. After eight adsorption–desorption cycles, the adsorption efficiency remained above 90%, indicating that the gel foam structure was stable. Infrared (IR) and X-ray photoelectron spectroscopy (XPS) analyses showed that CO 2 adsorption occurred via physical adsorption. The interaction state and adsorption mechanism of CO 2 and gel foam adsorption were explained using a molecular dynamics model. In addition, the gel material can be used as a filling material in underground coal mines for low-temperature resistance and to prevent the spontaneous combustion of coal. This conforms to the concept of sustainable development and has significant theoretical research significance.
研究领域:
材料科学
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环境科学
·
化学工程
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高影响因子
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