Advanced Science
·
2026
·
IF 14.1
Hui Zhao,Shuai Li,Jiabei He,Tong Gao,Jingfeng Wang,Dongxiao Kan,Wangtu Huo,Lixin Chen
Lightweight and flexible porous MXene films have emerged as promising candidates for electromagnetic interference (EMI) shielding and infrared stealth. However, current foaming techniques remain a challenge in preserving the intrinsic properties of MXene while achieving eco-friendly foaming. Herein, supercritical CO 2 foaming technology is employed to realize the green foaming of dense MXene films without compromising the inherent structure of the MXene nanosheets. The phase transition of supercritical CO 2 induces bubble nucleation and growth, effectively unfolding the stacked MXene nanosheets into a porous architecture. This strategy is broadly adaptable and can also be extended to other two-dimensional (2D) films, such as graphene oxide. Benefiting from highly-conductive porous skeleton, the foamed porous MXene film exhibits an EMI shielding effectiveness of ∼73.2 dB, which is 21% higher than that of the pristine MXene films. Furthermore, its absolute shielding effectiveness attains 23160 dB·cm 2 /g, surpassing most previously reported MXene-based porous materials. Notably, the porous MXene films also demonstrate excellent infrared thermal camouflage performance across a broad temperature window. This work not only offers an insight for the foaming of 2D MXene materials but also highlights the considerable engineering prospects of porous MXene films in the field of safety protection.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Jie Gao,Shaoqing Yu,Xiaojun Deng,Jingyu Ran,Chuan Ma,Yunlin Shao,Lei Tang,Xin Huang
CO 2 hydrogenation to methanol is severely constrained by thermodynamic equilibrium limitations and rapid catalyst deactivation at elevated temperatures. To address these challenges, a novel strategy integrating dielectric barrier discharge (DBD) non-thermal plasma (NTP) with Cu-Ce-Zr solid solution catalysts was adopted for low-temperature methanol synthesis. A series of Cu-Ce 1-x Zr x O 2 (x = 0.2–0.8) catalysts with varying Zr/Ce ratios were synthesized to systematically investigate the regulatory mechanism of lattice defects on the plasma-catalytic performance and the potential synergy between the plasma and catalyst. Characterization results revealed that an optimal Zr content (x = 0.6) maximized the surface oxygen vacancy concentration, generating abundant Ce 3+ -O v -Zr 4+ sites and stabilizing highly dispersed active Cu species. At near-ambient temperature and atmospheric pressure with optimal discharge parameters (30 kV, 9 kHz), the plasma-assisted Cu-Ce 0.4 Zr 0.6 O 2 system achieved CO 2 conversion of 20.5 % with methanol selectivity of 50.6 %, corresponding to methanol space–time yield of 148.4 mg·g cat -1 ·h −1 . A strong synergy was observed between the plasma and the Cu-Ce 0.4 Zr 0.6 O 2 catalyst. The plasma efficiently activated gas-phase molecules, while the catalyst regulated the hydrogenation pathway to promote CH 3 OH formation and suppress side reactions. Compared to the plasma-alone mode, the energy consumption for methanol production was reduced by 81.5 %, and the system exhibited excellent stability over 24 h of continuous operation. This work provides insights into the rational design of catalysts for application in NTP-catalytic systems.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2026
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IF 8.4
Devendra Sillu,Varenyam Achal
Biological CO 2 sequestration and storage as inert solid carbonates is a promising approach utilizing carbonic anhydrase. In present study, we report the synthesis of a magnetic carbonic anhydrase nanobiocatalyst using halloysite nanotubes (HNTs) as the backbone. Magnetic HNTs were functionalized with polydopamine (PDA) and polyethylenimine (PEI), followed by covalent enzyme immobilization via glutaraldehyde crosslinking. The nanobiocatalyst achieved 58.37 % enzyme loading with 63.58 % retained activity. Comprehensive characterization confirmed the effective anchoring of enzyme molecules on the surface of the functionalized magnetic HNTs. The nanobiocatalyst demonstrated superior stability across varying pH and temperature conditions compared to free carbonic anhydrase. It retained 65.2 % activity even after 10 weeks of storage and remained functional for 17 reuse cycles, indicating excellent operational stability. Additionally, the nanobiocatalyst exhibited enhanced catalytic efficiency and biomimetic CO 2 sequestration with reusability potential. This approach offers a significant improvement over conventional enzyme immobilization techniques by providing enhanced stability, reusability, and catalytic performance. The use of magnetic HNTs as a support allows for easy recovery and reuse, making this nanobiocatalyst highly suitable for industrial applications in carbon capture and storage. With its superior stability and performance, this system presents a promising strategy for future advancements in sustainable carbon management and green technology.
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ADVANCED POWDER TECHNOLOGY
·
2018
·Vol. 30
·期 2
·302-310
·
IF 2.943
Bingbing Liu,Yuanbo Zhang,Jia Wang,Juan Wang,Zijian Su,Guanghui Li,Tao Jiang
Investigations on the MnO 2 -Fe 2 O 3 system roasted in air has been reported in our previous work. This study further investigated the MnO 2 -Fe 2 O 3 system roasted under CO-CO 2 atmosphere. Extensive investigations were concentrated on the reduction of simplex iron oxides or manganese oxides, and little attention were paid on the reduction of MnO 2 -Fe 2 O 3 system regarding to interactive reactions between them. In this work, it was found that spinel-type Mn x Fe 3−x O 4 with high magnetism formed easily under CO-CO 2 atmosphere. The reduction and thermodynamic analyses of pure MnFe 2 O 4 were also researched to better understand the reduction behaviors of MnO 2 -Fe 2 O 3 system. Phase study showed that a series of Mn-Fe composite oxides, including Mn x Fe 3−x O 4 and (MnO) y (FeO) 1−y , generated during the reduction of MnO 2 -Fe 2 O 3 system. Mn x Fe 3−x O 4 was readily generated under CO content of 2.5–25 vol% at 1000 °C. With further increase of CO content, Mn x Fe 3−x O 4 was reduced to (MnO) y (FeO) 1−y and then to MnO and metallic iron. Reduction of manganese oxides, iron oxides and manganese ferrites happened concurrently during the reduction of MnO 2 -Fe 2 O 3 system. And the reduction of MnO 2 , Fe 2 O 3 , Fe 3 O 4 and MnFe 2 O 4 were compared by TG and thermodynamic analyses. In addition, the morphology evolution and magnetism change of the MnO 2 -Fe 2 O 3 system reduced under different CO contents were also studied.
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Journal of Materials Chemistry A
·
2026
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IF 9.2
Jinglin He,Ziheng Jin,Rui Zhou,Zhongde Dai,Hui Su,Yiqiao Zhang,Bangda Wang,Xia Jiang
The urgent demand for efficient CO2 capture from high-temperature flue gas streams necessitates the development of advanced adsorbents with robust structural stability and rapid sorption kinetics. While amine-functionalized materials offer promising affinity for CO2 within elevated-temperature operational windows, conventional post-loading strategies often compromise pore accessibility and hinder mass transfer due to network obstruction. Here, we introduce an innovative in situ self-assembly approach to incorporate amine functionalities directly into the interconnected meso- and macroporous framework of carbon supraparticles (CSs). This strategy takes advantage of hydroxyl-rich carbon nanofibers (CNFs) during in situ synthesis to help retain amines within the CS pores and anchor them more strongly to the support, leading to amines showing a more uniform distribution, and better resistance to evaporation and leaching. The resulting material demonstrates rapid CO2 uptake at 1 bar and 70 °C, achieving an impressive adsorption rate of 0.17 mmol g−1 min−1 and a capacity of 2.87 mmol g−1, while exhibiting appropriate adsorption stability over repeated adsorption–desorption cycles. These performance metrics represent 4-fold and 2.4-fold enhancements in rate and capacity, respectively, compared to conventional post-loading approaches. Overall, this work presents a scalable and sustainable strategy for developing high-efficiency CO2 capture materials suited for industrial deployment.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
·
IF 4.4
Weitao He,Chun Miao,Wei Jiang,Li Yan,Chunbo Liu,Keyu Cui
Photocatalysis, which represents a clean and efficient energy conversion technology, shows great potential for addressing both environmental pollution and the energy crisis. Within this context, photocatalytic CO 2 reduction and pollutant degradation represent important research directions. In this study, CdIn 2 S 4 /g-C 3 N 4 (g-C 3 N 4 , graphitic carbon nitride) composites were hydrothermally synthesized and assessed for their photocatalytic performance in the reduction of CO 2 and the degradation of methyl orange and tetracycline as model pollutants. Among the synthesized composites, the optimal photocatalytic activity was achieved by the CdIn 2 S 4 /g-C 3 N 4 (80) composite, with the degradation efficiency for methyl orange reaching 97.21% over 100 min and the reduction efficiency for CO 2 reaching 74.34 μmol g −1 over 4 h. The obtained results demonstrated that the heterojunction formed between CdIn 2 S 4 and g-C 3 N 4 effectively promoted the separation of photogenerated charge carriers while effectively suppressing their recombination, thereby improving the photocatalytic performance. Moreover, a cyclic stability experiment demonstrated that the CdIn 2 S 4 /g-C 3 N 4 composite exhibited excellent recyclability, which is important for its practical application. This work therefore provides a promising strategy for the design of highly efficient and stable photocatalysts toward sustainable environmental remediation and energy conversion.
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Small
·
2026
·
IF 11.8
Junhui He,Zhansheng Wang,Jiang Xue,Bichu Huang,Linjuan Yang,Cong Luo,Xudong Cui,Zhuoyu Ji,Daopeng Sheng,Tao Chen,Wenkun Zhu
Surface halogen atom modification represents a promising strategy for regulating the photocatalytic performance of covalent organic frameworks (COFs). In this study, a surface bromine atom modification strategy is proposed for TzPm-COF material, which finely tunes its donor-acceptor (D-A) structure and significantly enhances both the activity and selectivity of CO 2 photoreduction. By virtue of the in situ Kelvin probe force microscopy (KPFM), along with others spectral technology we confirm that bromine functionalization effectively facilitates the separation and migration of photogenerated charge carriers. Accordingly, the as-prepared TzPm-COF-2Br exhibits a remarkable CO production rate of 155 µmol g − 1 h − 1 under visible-light-driven CO 2 reduction, approximately 2.7 times higher than that of TzPm-COF (57 µmol g − 1 h − 1 ), along with exceptional selectivity (99.4%), which surpasses the majority of analogous CO-producing photocatalysts in overall performance. Relying on the functional theory (DFT) calculations, we further confirm the introduction of bromine atoms promoted directional electron transfer from TAPTz donors to PMDCA-2Br acceptors through intrinsic polarization effects, thereby enhancing the adsorption and activation of CO 2 at oxygen sites on PMDCA units. This work provides a rational material design strategy for developing functionally modified COFs toward efficient and selective photocatalytic CO 2 reduction.
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International Journal of Greenhouse Gas Control
·
2013
·
IF 3.944
Zhicheng Xu,Shujuan Wang,Changhe Chen
The cyclic capacity and cyclic loading of mixtures of 1,4-Butanediamine (BDA) and 2-(Diethylamino)-ethanol (DEEA) with different concentrations were compared using a fast screening facility. The biphasic solvent, 2 M BDA blended with 4 M DEEA, was found to have higher cyclic capacity and loading than other concentrations and 5 M MEA. The individual amine distributions in the upper and lower phases were measured by DX-120 ion chromatography (IC), with a formation mechanism then proposed for the biphasic solvents and verified with solubility experiments. The reaction products in the two phases were measured by a JNM ECA-600 nuclear magnetic resonance spectrometer (NMR).
研究领域:
化学工程
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碳捕集与封存
·
溶剂设计
·
分离科学
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JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Lanyun Wang,Lingshuang Li,Yongliang Xu,Yao Li,Yan Wang,Tingxiang Chu
In this work, several alkali metal salts, shortened by MBF 4 and CH 3 OOM(MAc, M = Li + , Na + , K + ), were mixed with [Bmim][BF 4 ] or [Bmim][Ac] separately to prepare kinds of hybrid absorbents ( i.e. , [Bmim][BF 4 ]-LiBF 4 , [Bmim][BF 4 ]-NaBF 4 and [Bmim][BF 4 ]-KBF 4 with the same anion of [BF 4 ] - , [Bmim][Ac]-LiAc, [Bmim][Ac]-NaAc and [Bmim][Ac]-KAc with the same anion of acetate) to absorb CO 2 . The results show that the hybrid absorbents based on [Bmim][BF 4 ] has a relatively enhanced absorption effect on CO 2 , while the hybrid absorbent based on [Bmim][Ac] has an inhibitory effect. When a low concentration of MBF 4 was applied, LiBF 4 -[Bmim][BF 4 ] shows higher CO 2 capacity than NaBF 4 -[Bmim][BF 4 ] and KBF 4 -[Bmim][BF 4 ] solutions. With the concentration of MBF 4 increase, NaBF 4 -[Bmim][BF 4 ] and KBF 4 -[Bmim][BF 4 ] become more favorable for CO 2 absorption, which also appeared in the MAc-[Bmim][Ac] systems. According to the MD simulation results, Na + and K + have stronger attraction forces with CO 2 , and Na + is easier to make the [BF 4 ] - anions to aggregate around it. According to the MD calculations, for the [Bmim][BF 4 ]-MBF 4 hydrid systems, Na + has the weakest ability to aggregate and form M + layer hindering the contact of CO 2 and anion. Combining with its strongest ability to attract the [BF 4 ] - anion, a largest space of [Bmim][BF 4 ] to accomodate more CO 2 molecules is created. In comparison, for the physical–chemical absorbent [Bmim][Ac], the strong M + aggregation and [Ac] - attraction by M + are the main reasons for the decreased CO 2 capacity, due to the reduced number of [Ac] - responsible for the chemically binding with CO 2 during absorption.
研究领域:
环境化学
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材料科学
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碳捕集与封存
·
离子液体研究
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wenqin Ling,Zhengguang Zou,Shuchao Zhang,Xiaoxiao Peng,Shiying Luo,Xin Tang,Jing Geng
Heteroatom doping has always been a common modification method for lithium-ion batteries (LIBs) cathodes. The addition of guest heteroatoms to the material can adjust the microstructure of the host material, and enlarge the lattice spacing or form the vacancy defect of oxygen, which can effectively improve the Electrochemical performance of materials. Herein, CO 2 -modified VO 2 (B) nanorods were synthesized via a simple one-step hydrothermal method . Thanks to the extended layer spacing in VO 2 (B) that results from CO 2 small molecules, the synthesized CO 2 -VO 2 electrode exhibits a high initial capacity of 251.1 mA g −1 at 100 mA g −1 , and a capacity retention of 81.8 % after 80 cycles. It is worth noting that the CO 2 -VO 2 electrode also has a high rate capacity (170.0 mAh g −1 at 1 A g −1 ), and the capacity recovery rate can reach 84.5 % even under the condition of variable current. Further studies showed that the role of CO 2 small molecules as a pillar in the interlayer of VO 2 (B) and a weak electrostatic attraction between O CO2 and Li + existed, resulting in a robust crystal structure and convenient Li-ion diffusion conditions during the (de)intercalation of lithium ions in VO 2 (B). This study opens the way for further exploration of the application of small molecule doping in the field of lithium-ion batteries.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Min Wang,Zhancheng Zhang,Tanju Yildirim,Libei Feng,Linglong Zhang,Jue Wang
Renewable electricity powered CO 2 electroreduction to methane is promising for producing highly specific combustion fuels. However, the reduction process is severely limited by poor selectivity and chemical activity at high electrolysis reaction rates. Herein, we produce tandem electrocatalysts by combining organic small molecules (perylene-3,4,9,10-tetracarboxylic dianhydride and pentacene) with copper catalysts supported on microporous polytetra fluoroethylene with enhanced *CO protonation and weakened hydrogen evolution. Experimental results show that the tandem catalysts effectively suppress the two-electron reduction process associated with hydrogen (H 2 ) and carbon monoxide (CO) production while inhibiting the multielectron conversion process associated with ethylene production (C 2 H 4 ). As a result, the tandem catalysts enable an efficient eight-electron transfer for electrochemical reduction of CO 2 and demonstrate a ∼ 50 % (±2%) Faradaic efficiency for CO 2 -to-methane conversion at a partial current density of 220 mA cm −2 in 1 M KHCO 3 solution. Notably, the selectively of CO 2 -to-CH 4 is 2.7 times higher than that of a copper catalyst supported on microporous polytetra fluoroethylene which is known to produce C 2 H 4 with ∼ 50 % Faradaic efficiency. This work paves the way for tuning *CO dimerization and hydrogen evolution reaction to maximize CO 2 methanation by using abundant organic molecular materials.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-9
·
IF 16.6
Hu Canyu,Chen Xing,Low Jingxiang,Yang Yaw-Wen,Li Hao,Wu Di,Chen Shuangming,Jin Jianbo,Li He,Ju Huanxin,Wang Chia-Hsin,Lu Zhou,Long Ran,Song Li,Xiong Yujie
Imitating the natural photosynthesis to synthesize hydrocarbon fuels represents a viable strategy for solar-to-chemical energy conversion, where utilizing low-energy photons, especially near-infrared photons, has been the ultimate yet challenging aim to further improving conversion efficiency. Plasmonic metals have proven their ability in absorbing low-energy photons, however, it remains an obstacle in effectively coupling this energy into reactant molecules. Here we report the broadband plasmon-induced CO 2 reduction reaction with water, which achieves a CH 4 production rate of 0.55 mmol g −1 h −1 with 100% selectivity to hydrocarbon products under 400 mW cm −2 full-spectrum light illumination and an apparent quantum efficiency of 0.38% at 800 nm illumination. We find that the enhanced local electric field plays an irreplaceable role in efficient multiphoton absorption and selective energy transfer for such an excellent light-driven catalytic performance. This work paves the way to the technique for low-energy photon utilization.
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