INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2026
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IF 3.9
Zhangxinyu Fan,Yiheng Cui,Weixiang Wang,Yi Sun,Liqian Lin,Xinxin Geng,Guo Tian,Qin Zhong,Boyang Liu
Abstract Global warming has spurred interest in CO2 utilization. Coupling reverse water–gas shift (RWGS) with hydroformylation allows olefins to react with H2/CO2 to produce valuable aldehydes, which is a profitable reaction and helps with carbon fixation. However, temperature mismatch between the two reactions and limited mechanistic understanding hinder the rational design of catalysts. Using density functional theory (DFT) calculations and experimental evaluations, we investigated the effects of different phosphine ligands and acid additives on the performance of silane-free CO2 hydroformylation. Formic acid alters the CO2 activation pathway and reduces the energy barrier, thereby improving catalytic activity and chemoselectivity. The effects of reaction conditions reveal a competitive relationship between CO2 reduction and olefin carbonylation, suggesting that balancing RWGS and hydroformylation rates enhances catalytic performance. Our work not only deepens the mechanism understanding of silane-free CO2 hydroformylation but also paves the way for the rational design of subsequent high-performance catalysts.
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高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2026
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IF 8.9
Guolan Dou,Shuai Huo,Menghan Wang,Peng Chen,Xiaoxing Zhong,Botao Qin
A CO 2 uptake of 65.7 mg/g was achieved in the lignin-modified cementitious sealing material under a 30% CO₂ atmosphere. • A competitive microstructural mechanism of C-A-S-H decalcification and carbonate precipitation was proposed. • The carbonated lignin-modified cementitious sealing material retains both low permeability and high compressive strength. To integrate in-situ CO 2 sequestration with coal mine sealing and fire prevention, this study investigated the carbonation behavior and comprehensive sealing performance of a lignin-modified coal-based solid waste cementitious material (LFGS). Synthesized via the alkali activation of fly ash, coal gangue, and ground granulated blast furnace slag, the LFGS specimen was evaluated under varying CO 2 concentrations and carbonation durations, utilizing ordinary Portland cement (P·O 42.5) as a reference. Results indicate that the carbonation depth of the LFGS specimen follows a square-root-of-time relationship indicative of diffusion-controlled kinetics, demonstrating superior long-term CO 2 accessibility compared to P·O 42.5. After 28 days of exposure to 30% CO 2 , the CO 2 uptake of the LFGS specimen reached 65.7 mg/g. Furthermore, quantitative analysis confirmed that the low lignin dosage (0.1 wt%) exerts a negligible effect on the reactive calcium reservoir. Microstructural characterization revealed a competitive mechanism of matrix deconstruction and pore filling during carbonation. While the decalcification of C-A-S-H gel induces degradation and pore coarsening within its network, the concurrent precipitation of calcite and vaterite effectively fills capillary pores and microcracks. Despite this microstructural reorganization, the LFGS specimen retained a compressive strength of 29.8 MPa even after achieving a CO 2 uptake of 65.7 mg/g. This mechanical performance substantially exceeds that of conventional mine sealing materials. Crucially, the carbonated material maintained a low permeability coefficient, ensuring effective gas barrier properties. These findings demonstrate that the LFGS system fulfills the mechanical and permeability requirements for underground sealing operations while acting as a CO 2 sink, providing a viable pathway for the synergistic management of solid waste utilization, mine safety, and greenhouse gas mitigation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Yuchen Zhang,Xiaowei Zhou,ManMan Huo,Junfen Li,Yanfang Fan,Rong Zhang,Nanwen Li
Evaporation-rate control regulates kinetic trapping during polyimide membrane formation. • Stronger kinetic trapping preserves loosely packed nonequilibrium chain configurations with increased free volume. • Decarboxylative cross-linking amplifies structural gains, enhancing CO 2 permeability with modest selectivity loss. • This simple processing strategy improves CO 2 /CH 4 separation without polymer-backbone redesign or additional reagents. Kinetic trapping, the arrest of polymer chains in non-equilibrium configurations during rapid solvent evaporation, provides a deliberate route to engineer free-volume architecture in gas separation membranes. By controlling the solvent evaporation rate through casting temperature, faster evaporation from two solvents of contrasting volatility (DMAc and THF) systematically traps 6FDA-TFDB-DABA polyimide chains in more loosely packed configurations. This produces enlarged free volume, evidenced by expanded interchain spacing (5.33 to 5.49 Å, DMAc; 5.40 to 5.58 Å, THF), decreased density, enhanced birefringence, and increased surface roughness. This looser chain packing contributes to a substantial increase in CO₂ permeability, from 25.7 to 41.1 Barrer for DMAc-cast membranes and from 33.8 to 49.0 Barrer for THF-cast membranes, corresponding to increases of approximately 60% and 45%, respectively. These permeability gains arise from concurrent improvements in both CO₂ diffusivity and solubility, while the CO₂/CH₄ selectivity decreases only modestly. After thermal decarboxylation cross-linking at 340 °C, the rapidly evaporated THF-based membrane reaches 89.9 Barrer and surpasses the 1991 Robeson upper bound, withstanding feed pressures up to 600 psi without plasticization. This kinetic-trapping strategy requires no new reagents, monomer synthesis, or complex processing, offering a scalable, industrially compatible route to high-performance polyimide gas-separation membranes. Download: Download high-res image (280KB) Download: Download full-size image
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Sijia Pang,Xudong Zheng,Zhouzhou Yang,Wei Sun,Shijie Wang,Jinfeng Mei,Jian Rong,Zhongyu Li
Green sol-gel/supercritical drying yields amine-modified silica-titania aerogel. • Uniform TiO 2 & amine grafting via terephthalic acid and ammonia/fluoride. • High CO 2 uptake (3.88 mmol g −1 ) and excellent stability (>88% after 10 cycles). • Solar-driven photocatalytic CO production (34.6 μmol g −1 h −1 ) via Ti-O-Si junction. To address the global climate crisis caused by carbon dioxide (CO 2 ) emissions, achieving “carbon neutrality” requires the construction of an efficient artificial carbon cycle. However, traditional carbon capture and utilization technologies have bottlenecks. Using tetrabutyl titanate, terephthalic acid and tetraethyl orthosilicate as precursors, amine modified silicon titanium composite aerogel was successfully prepared by using sol gel method combined with supercritical drying technology and the introduction of ammonia and ammonium fluoride. Systematic characterization reveals that the specific surface area of this sample is as high as 548.12 m 2 g −1 , and it simultaneously achieves an adsorption capacity of 3.88 mmol g −1 , exhibiting excellent adsorption properties and outstanding cyclic stability. In the CO 2 photoreduction performance test, STA-300 exhibited excellent synergistic effects of adsorption and photocatalysis. The principle is that the surface amino group enriches CO 2 molecules through chemical adsorption, improving the local concentration of active sites, TiO 2 components are stimulated by light to produce photogenerated electrons, and the enriched CO 2 is activated by photogenerated electrons and reduced to CO. This study provides an effective strategy for designing composite aerogel materials with both adsorption enrichment and photocatalytic conversion functions.
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高影响因子
Petroleum
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2026
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IF 5.5
Xiaogang Li,Chuan Wang,Jingyi Zhu,Zhaozhong Yang,Liehui Zhang,Jiang Wu,Liangping Yi,Min Jia,Zhiqi Liu,Jian Zheng,Dong Xia
An ultralow-density composite proppants suitable for SC-CO 2 fracturing were prepared • High sphericity, apparent density ≤1.18 g/cm 3 , and crushing rate ≤ 2.31% at 69 MPa • Sedimentation rate is 6 times slower than that of ceramsite in SC-CO 2 environment • Maintaining a relatively high conductivity of 6.98 μm 2 ·cm under 96.5MPa : Conventional proppants used in supercritical carbon dioxide (scCO 2 ) fracturing suffer from rapid settling and poor fracture conductivity due to the extremely low viscosity of scCO 2 , which severely limits proppant transport and fracture effectiveness. To overcome these limitations, an ultra-low density poly(methyl methacrylate)/graphite (PMMA/G) composite proppant suitable for scCO 2 fracturing was prepared via in situ suspension polymerization. The physicochemical, mechanical, and thermal properties, as well as fracture conductivity and scCO 2 resistance, were systematically characterized. Incorporation of 2.0 wt.% graphite significantly enhanced compressive strength (crush rate≤2.31% at 69 MPa), thermal stability (glass transition temperature increased to 129.53 °C), and sphericity (≥0.90), while maintaining an apparent density≤1.18 g/cm 3 . After 12 h of exposure to scCO 2 , the composite proppant exhibited minimal swelling and retained structural integrity with only a slight increase in crush rate. Sedimentation tests showed a settling velocity of 3.55 cm/s—approximately six times slower than that of conventional ceramic proppants—demonstrating excellent suspension and transport capability. Furthermore, the PMMA/G proppants maintained a relatively high fracture conductivity of 6.98 μm 2 ·cm under 96.5 MPa, confirming their outstanding load-bearing performance. These results demonstrate that the PMMA/G composite proppant provides a promising material solution for efficient and sustainable scCO 2 fracturing in unconventional reservoirs. Download: Download high-res image (263KB) Download: Download full-size image
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Xuebing Wang,Bin Jiang,Shuai Yin,Xiemin Liu,Meisi Chen,Feng Zhang
Dual-active-site PIL-based phase-merging absorbent (TDPH) for efficient CO 2 capture. • High CO 2 loading (4.32 mol·kg −1 ) and rapid absorption via synergistic proton transfer. • Proton transfer mechanism revealed by NMR, titration and DFT calculations. • Regeneration energy reduced to 1.82 GJ·t −1 . During the CO 2 capture process with amine-based absorbents, proton transfer can effectively regulate the absorption performance, especially the absorption rate and the composition of the products. In this study, by using lysine anion (Lys − ) and 3-dimethylaminopropyl ammonium (DMAPAH + ) as the anion and cation of a protic ionic liquid (PIL), respectively, a biphasic system (TDPH) was constructed with aqueous solutions of N , N , N ′, N ′-tetramethyl-1,6-hexanediamine (TMHDA) and PIL, which presents a rich and effective proton transfer network for efficient CO 2 capture. Lys − and DMAPAH + jointly form a dual-active-site network, creating a rich proton-transfer microenvironment that facilitates proton migration, thereby achieving a high CO 2 loading (4.32 mol/kg). Moreover, during the absorption process, TMHDA accepts protons, inducing the original two phases to merge into one phase, thereby reducing the viscosity of the absorbent. Accordingly, compared to the single-active-site system, the CO 2 loading of TDPH is increased by 20.6%, while the absorption equilibrium time is reduced by 50.1%, with the regeneration energy consumption being only 1.82 GJ/ton CO 2 . NMR, titration and quantum chemical calculations confirm that Lys − and DMAPAH + synergistically participate in the proton transfer process toward TMHDA, forming multiple CO 2 binding sites, and enhancing phase merging during absorption and phase separation during desorption. This work demonstrates that the dual-active-site functionalization strategy is an effective approach for harnessing the potential of phase-transition ionic liquids and designing highly efficient, low-energy-consumption CO 2 absorbents.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Ji Liu,Long-peng Fang,Yuan-gu Xia,Meng-fan Liu,Jia-he Wang,He-ming Liu,Bin Hu,Kai Li,Zhen-xi Zhang,Qiang Lu
Trace Ag (Ag/Cu = 0.001) significantly enhanced Cu-Zn catalyzed CO 2 hydrogenation. • STY MeOH of Cu-Zn-Ag 0.001 was 467.8 g·kg −1 ·h −1 , 1.82 times higher than Cu-Zn. • Ag promotes oxygen vacancy formation around active sites at the Cu-ZnO interface. • Methanol synthesis follows the formate pathway with Ag lowering energy barriers. The methanol synthesis from catalytic CO 2 conversion has emerged as an attractive strategy for carbon valorization and sustainable energy generation. However, the catalytic efficiency of conventional Cu-Zn-based catalysts remains far from satisfactory. Herein, a Cu-Zn-Ag catalyst, synthesized via a facile co-precipitation method, exhibited a significantly improved methanol production activity compared with Cu-Zn catalysts. Notably, a trace amount of Ag doping (the Ag/Cu molar ratio was 0.001) could significantly elevate the methanol generation, with its space-time yield increasing from 258 ± 17 to 468 ± 23 g MeOH ·kg cat −1 ·h −1 , an increase of 1.82 times, while further increasing Ag doping would lead to reduced activity. Structural characterizations confirmed the Ag presence, being doped in the Cu lattice, and Ag doping was significantly beneficial to oxygen vacancy formation, which was deemed the active sites for methanol formation. The detailed reaction pathway (formate pathway) for methanol synthesis was also investigated based on density functional theory (DFT) calculations, where Ag doping lowered the energy barriers. This work elucidates the mechanism of Ag doping in Cu-Zn catalysts and provides key insights into the reaction mechanism of CO 2 hydrogenation to methanol, highlighting its potential for sustainable methanol synthesis. Download: Download high-res image (177KB) Download: Download full-size image
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2026
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IF 7.9
Yuantao Xie,Xiaoxin Feng,Yuan Jia,Chenguang Hu,Ruiying Bai,Xiufang Sun,Gang Liu,Qiuming Li
Steel production poses dual environmental challenges: significant CO 2 emissions and the generation of steel-making slag (SS), a major solid waste. Meanwhile, the low value utilization of SS results in the loss of calcium (Ca) resources. Utilizing Ca-containing SS to mineralize and solidify CO 2 is expected to achieve dual benefits of carbon reduction and solid waste utilization. In this paper, the feasibility of SS CO 2 absorption was investigated using an indirect mineralization method. A leaching solution was prepared by dissolving SS with ammonium chloride (NH 4 Cl), which was then used for CO 2 absorption, with bubbling absorption as the primary carbonation method. The variation in outlet CO 2 concentration during carbonation was monitored to characterize the reaction behavior at different stages. The effects of CO 2 concentration, leaching solution pH, gas flow rate, and absorption configuration on CO 2 absorption behavior were systematically investigated. Among the tested bubbling configurations, the two-stage system exhibited the best overall performance, achieving a cumulative CO 2 uptake of 0.38 g CO 2 ·L⁻¹ of leaching solution. In addition, a spray-assisted carbonation method was explored, demonstrating enhanced gas–liquid contact characteristics and potential for further process development.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
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IF 4.4
Feng-Jun Zhang,Zi-Han Yang,Xue-Qin Zhou,Huan Li,Won-Chun Oh
Successful synthesis of Bi 3 O 4 Br/Bi 2 WO 6 type-II heterojunction photocatalyst. • Stability and CO₂ reduction activity of the as-prepared materials. • Bi 3 O 4 Br/Bi 2 WO 6 –20 exhibits best performance, achieving CO production rate of 13.73 μmol·g −1 h −1 . • Demonstration of closed junctional contact and synergistic effect of type-II heterojunction. The development of efficient, stable, and highly selective catalysts is of great importance for the photocatalytic reduction of CO 2 . However, the inefficient separation and transfer of photogenerated charge carriers remain a major challenge for Bi-based photocatalysts. In this work, Bi 3 O 4 Br/Bi 2 WO 6 type-II heterojunction photocatalyst via a two-step approach, and its photocatalytic CO 2 reduction performance was systematically investigated. The results shin that Bi 3 O 4 Br/Bi 2 WO 6 –20 exhibits best performance, achieving CO production rate of 13.73 μmol·g −1 h −1 and is approximately 2.09-fold compared with pure Bi 3 O 4 Br and 2.05 -fold compared with pure Bi 2 WO 6 , while maintaining nearly 100% CO selectivity. Based on the experimentally determined band structures and complementary spectroscopic and photoelectrochemical results, a possible type-II charge-transfer pathway is proposed to account for the enhanced CO 2 photoreduction performance. In addition, composite demonstrates excellent stability during photocatalytic process. This study provides an effective strategy for facile construction of efficient CO 2 reduction photocatalysts. Download: Download high-res image (176KB) Download: Download full-size image
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
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IF 4.6
Bingshuang Li,Xin Li,Xiaoxi Huang
The Sn-MOF reconstructed into a SnO nanoflower structure only upon electrolyte immersion. • The SnO nanoflower achieves >92% formate Faradaic efficiency in both H-cell and flow cell. • Its abundant grain boundaries and edge sites enhance the adsorption and stabilization of the *OCHO intermediate. • The nanoflower morphology remains stable during CO 2 reduction, contributing to sustained catalytic performance. Sn-based materials are promising for electrochemical CO 2 reduction to formate, yet the real active species and structural evolution under operating conditions remain elusive. Here, we track the spontaneous, potential-independent reconstruction of a Sn-terephthalic acid framework (Sn-PTA) in KHCO 3 electrolyte, revealing a two-stage transformation that dictates catalytic performance. Initially, the MOF decomposes into nanoflower-like SnO assemblies (Sn-PTA-180), characterized by abundant grain boundaries and edge sites that maximize active surface exposure. This metastable intermediate exhibits superior intrinsic activity, achieving a 92.7% formate Faradaic efficiency (FE) at 38.9 mA cm −2 in an H-cell and maintains 92.6% FE at 200 mA cm −2 in a flow cell. In situ ATR-SEIRAS correlates this performance to the optimized adsorption and stabilization of the *OCHO intermediate on the unique nanoflower architecture. Furthermore, we demonstrate that under cathodic bias, SnO undergoes a phase transition to metallic Sn while perfectly inheriting the advantageous morphology. This work elucidates electrolyte-driven MOF reconstruction as a powerful in situ route to engineer catalytically active interfaces, offering a new paradigm for designing high-performance pre-catalysts for efficient CO 2 -to-formate conversion. Download: Download high-res image (362KB) Download: Download full-size image
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Chem
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2026
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IF 19.1
Wen Wang,Xinyuan Zhao,Qi Li,Yue Zhang,Qifan Wang,Yao Xie,Fangyu Ren,Shengli Hou,Bin Zhao
The synthesis of asymmetric carbonates from renewable CO 2 is important for sustainable chemistry but often suffers from low efficiency, harsh reaction conditions, and noble metal catalysts. Achieving this efficient transformation under mild conditions by non-noble metal catalysts remains a great challenge. Herein, a framework {[In 3 ( μ 3 -O)(H 2 O)Cu 4 (CPT) 4 I 2 ]⋅(NO 3 )⋅1.5H 2 O⋅3DMF} n (CuIn-CPT, CPT = 3,5-bis(4′-carboxyphenyl)-1,2,4-triazole) was synthesized, assembled from a [Cu 12 In 18 ] nanocage with multiple Cu I and In III Lewis acid sites, and it exhibits good thermal and chemical stabilities. It achieves up to 98% yield in multicomponent reactions of CO 2 , propargyl alcohols, and primary alcohols without solvent under mild conditions, with a record turnover number of 4,844—ten times higher than top Ag-based catalysts—and excellent recyclability over 10 cycles. Density functional theory (DFT) calculations and mechanistic studies confirm that the synergistic effect between [Cu 4 ] and [In 3 ] clusters enhances catalytic efficiency. This work provides an inspiration for developing efficient non-noble metal heterogeneous catalysts in CO 2 conversion.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Yi Zhou,Peike Cao,Shuo Chen,Hongtao Yu,Xie Quan
Selectively converting carbon dioxide (CO 2 ) to ethanol via photocatalysis offers a sustainable means of storing solar energy in chemical bonds. However, its efficiency is limited by an inadequate proton supply from water oxidation to drive the carbon‑carbon (C C) coupling step. This inefficiency leads to poor ethanol selectivity and promotes a competing hydrogen evolution side reaction, ultimately restricting overall system performance. Here, we designed a ternary In(OH) 3 -Cu 2 O/PCN heterojunction as a functionally partitioned catalyst: Polymeric carbon nitride (PCN) acts as the photoelectron donor, cuprous oxide (Cu 2 O) acts as the CO 2 reduction center, and trace indium hydroxide (In(OH) 3 ) is dedicated to water oxidation. Density Functional Theory (DFT) calculations reveal that water dissociation on In(OH) 3 generates active hydrogen species (*H), which are subsequently transferred to adjacent Cu sites with a low migration barrier. This interfacial proton relay mechanism avoids the accumulation of high-energy *H intermediates on the active sites, which suppresses the competing hydrogen evolution reaction. Correspondingly, the energy barrier for the crucial adsorbed carbon monoxide (*CO) dimerization step is lowered from 0.93 eV to 0.78 eV. The catalyst demonstrates superior activity to most documented photocatalysts for CO 2 -to-ethanol conversion, operating under sacrificial agent-free conditions, achieving an ethanol production rate of 125.4 ± 5.1 μmol g −1 h −1 and a selectivity of 90.4% ± 2.8%. These findings highlight the promise of functionally partitioned architectures in steering complex multi-step photocatalytic transformations toward valuable multi‑carbon products.
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PubMed
高影响因子
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