JOURNAL OF CATALYSIS
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2026
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IF 6
Kangjie Gao,Yuanyuan Zhao,Huanhuan Liu,Jiaxin Li,Peisen Luo,Fang Chen,Wentao Wang,Yong Hu
S-substitution induces compressive strain to reduce BiOX interlayer spacing. • Reduced interlayer distance builds rapid vertical pathways for charge transport. • S-doping upshifts Bi p-band center to promote CO 2 adsorption and *COOH formation. • S-BiOBr drives efficient CO 2 photoreduction with remarkable CO evolution rates. Solar-driven CO 2 photoreduction offers a compelling route to carbon neutrality, but its efficiency is limited by sluggish charge separation and a high CO 2 activation barrier. Conventional strategies like heterojunction construction and point-defect engineering are often hampered by the trade-off between bulk charge transport and surface reaction kinetics, or by lattice instability. Herein, we overcome these kinetic bottlenecks through a doping-driven interlayer strain engineering strategy that induces long-range ordered lattice distortion in two-dimensional bismuth oxyhalides (BiOX, X=Cl, Br, I). Controlled sulfur substitution at oxygen sites introduces localized compressive strain along the [0 0 1] direction, which reduces the van der Waals interlayer spacing. This structural modulation leads to a 4.69-fold amplification of the built-in electric field, establishing a rapid vertical charge-transport pathway that accelerates carrier separation. Concurrently, the compressive strain shifts the p-band center of Bi sites upward, strengthening Bi-6p/CO 2 -2π* orbital hybridization and thereby promoting CO 2 chemisorption and activation. The synergy between accelerated charge dynamics and optimized surface electronic structure lowers the barrier for *COOH formation, enabling highly selective CO production. As a result, the optimized S-doped BiOBr catalyst achieves a CO evolution rate of 81.34 μmol g −1 ·h −1 without sacrificial agents, representing a 9.53-fold enhancement over pristine BiOBr and surpassing other BiOX variants. This work validates interlayer strain engineering as a general strategy to unlock the catalytic potential of layered materials for efficient CO 2 conversion. We developed a doping-driven strain engineering strategy that enables precise and controllable compression of the interlayer spacing in layered photocatalysts. This compression facilitates the interlayer migration of photogenerated charge carriers, thereby significantly improving photocatalytic CO 2 reduction performance. Download: Download high-res image (205KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Lin Li,Kunpeng Yu,Dayu Liang,Jianzhong Yin
GNs were prepared by scCO 2 circulating jet cavitation. • Pristine GN was used to construct tubular α-Al 2 O 3 membranes. • MoS 2 hybridization widens and stabilizes graphene laminar channels. • The G 8 M 2 membrane exhibits outstanding dye/NaCl separation performance. Pristine graphene nanosheets provide a low-functional-group scaffold for laminar nanofiltration membranes, but compact, poorly wetted pathways limit water transport. Here, pristine graphene nanosheets were produced by a circulating supercritical CO 2 (scCO 2 ) jet-cavitation process and deposited on porous α-Al 2 O 3 tubular supports. MoS 2 nanosheets were incorporated as hydrophilic, locally distributed two-dimensional channel-regulating components, forming heterogeneous GN/MoS 2 lamellar pathways that increased water permeance while maintaining dye selectivity. A PEI@GA-crosslinked surface layer supplied positive charge. The optimized G 8 M 2 membrane rejected more than 99% of CBB, CR, and BY, with water permeances of 110.24–131.04 L·m −2 ·h −1 ·bar −1 . In dye/NaCl feeds, it achieved a permeance of 139.16 L·m −2 ·h −1 ·bar −1 and separation factor of 866.87 for CR/NaCl, with a flux recovery ratio above 97% during the tested CR fouling cycles. During the 120 h CR/NaCl separation stability test with periodic hydraulic rinsing every 12 h, the membrane delivered an average permeance of 124.46 L·m −2 ·h −1 ·bar −1 and an average CR rejection of 99.60%, while maintaining low NaCl rejection. This work integrates nonoxidative graphene exfoliation, tubular membrane construction, and heterogeneous two-dimensional channel regulation for dye/salt fractionation. Download: Download high-res image (75KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Dan Gao,Youwei Qi,Jiaxi Yang,Heng Zhang
Microchannels have a wide range of applications in the chemical industry, therefore the use of microchannels for desorption of CO 2 -rich absorbent solvents is of great importance to achieve a wide range of applications for efficient and cost-effective CO 2 capture. To further investigate the characteristics of the desorption process, an experimental study of the desorption of ethanolamine/non-aqueous CO 2 -rich absorbent solvent was carried out using circular microchannels with 0.8 mm, 1.0 mm and 1.2 mm internal diameters and 70 mm lengths of quartz microchannels. Response surface methodology was used to reduce the number of experiments and optimize the operating conditions, while a high-speed camera was used to record the gas–liquid two-phase flow inside the microchannels during desorption. A 4-factor, 3-level response surface design was constructed, in which the four factors are solvent flow rate (0.1, 0.2, 0.3 mL/min), desorption temperature (60, 70, 80 °C), amine percentage in solvent (10, 20, 30 wt.%) and microchannel diameter (0.8, 1.0, 1.2 mm). The results show that the desorption temperature of the desorption process can be significantly reduced by using microchannels and MEA/non-aqueous absorbent, and the desorption of CO 2 -rich absorbent solvents can be achieved at temperature of 60 °C. During the desorption process of the microchannels, six flow states were demonstrated: bubble flow, bubble-Taylor flow, merging and growth of the Taylor flow, Taylor flow, annular flow, and breakage of the annular flow. The CO 2 desorption ratio was generally high when the flow pattern was Taylor flow, with the highest ratio reaching 93.84%. The bubble average velocity and dimensionless variation length increase due to mass transfer between the liquid and gas phases, both of which reach a maximum at a solvent flow rate of 0.2 mL/min.
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Journal of Cleaner Production
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2023
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IF 11.1
Teng Lu,Zhaomin Li,Liping Du
With declining conventional reserves, tapping heavy oils generates substantial emissions yet is essential to meet energy demands. This study pioneers an integrated approach using silica aerogels to develop thermally stable flue gas foams for enhanced CO 2 sequestration and heavy oil recovery. Microfluidic experiments and molecular dynamics simulations revealed a 5-fold decrease in gas diffusion rates for aerogel-stabilized versus pure surfactant foams at 95 °C due to the ultralow thermal conductivity of the nanoparticle coating layer . The thermally stable nanoengineered foams demonstrated a remarkable 81.23% CO 2 trapping efficiency in heterogeneous cores, surpassing conventional flue gas foam. Additionally, three-dimensional simulations in an oil reservoir model showed improved vertical conformance and oil recovery with aerogel-stabilized foam. The exceptional insulating properties redirected heat downward to enhance sweep efficiency. This novel concept transforms flue gas emissions into value-added foams for concurrent environmental and productivity benefits during heavy oil development.
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JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Peng Yan,Zhisheng Chen,Xiang Li,Fenglan Liang,Yan Tan,Yidong Lin,Keqi Yang,Chuxuan Xiao,Jiahao Wu,Deyun Ma
By introducing functional groups into the isophthalate ligand to decorate the pore of the MOFs, gas adsorption and separation performance can be tunable. In this paper, two isostructural 2D Co-MOFs, [Co(5-MIA)(bpy)]·H 2 O ( 1 ) and [Co(5-EIA)(bpy)]·H 2 O ( 2 ) (5-H 2 MIA = 5-methoxyl-isophthalic acid; 5-H 2 EIA = 5-ethyoxyl-isophthalic acid; bpy = 4,4′-bipyridine), with different functionalized pore surfaces and channel sizes were designed and constructed. The structures and performance of the two Co-MOFs were analyzed by SCXRD, PXRD, IR, TGA, and gas sorption (CO 2 , C 2 H 2 , CH 4 , CO, and N 2 ). Attributed to the methoxyl of isophthalate skeleton, 1a (activated 1 ) shows enhanced CO 2 uptake over other gases. In spite of decreased pore sizes (3.49 Å) compared with 2a (4.38 Å), the CO 2 uptake of 1a (43.41 cm 3 g −1 ) is larger than that of 2a (22.39 cm 3 g −1 ) at 298 K and 100 kPa. Compound 1 incorporates methoxyl groups into the narrow channel, and exhibits the cooperative effect of CO 2 -preferential due to adsorbent-adsorbate coactions and size sieving. GCMC simulation has been used to explore the adsorption coactions of CO 2 and 1 , and the results confirmed that the methoxyl groups in the channel are the main binding sites of CO 2 . At ambient temperature and 100 kPa, the IAST selectivities of CO 2 /C 2 H 2 (1:1), CO 2 /CH 4 (1:1), C 2 H 2 /CH 4 (1:1), CO 2 /CO (1:2) and CO 2 /N 2 (15:85) on 1a were 2.6, 39.3, 13.3, 282 and 1433, respectively. The easy activation and regeneration, excellent thermal and humidity stability, and good reusability, make 1 a hopeful adsorbent for adsorption and separation of CO 2 .
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MICROPOROUS AND MESOPOROUS MATERIALS
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2023
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IF 5.2
Fangfang Li,Yueyue Hu,Yong Cheng,Ying-Hua Zhou
Exploiting an effective catalyst for CO 2 conversion into value-added chemicals under mild circumstances still remains a challenge. Herein, UiO-66 decorated with ionic liquids (ILs) (denoted as UiO-66-ILs) were facilely synthesized by the mixed ligands of 1,4-benzene dicarboxylic acid and pyridyl-containing mono-carboxylic acid isomer (including nicotinic acid (NA), isonicotinic acid (INA), and 2-pyridine carboxylic acid (PCA)), followed by the further modification with different bromoalkanes. Among various UiO-66-ILs, UiO-66 derivative containing the ILs composed of PCA and bromoethane (named as UiO-66-ILs(PCA-EtBr)) displayed superior catalytic performance on CO 2 -epichlorohydrin cycloaddition into chloropropene carbonate, with a high yield of 90 % under 0.1 MPa CO 2 at 110 °C without the addition of any solvent and cocatalyst. Whereas, UiO-66-ILs(NA-EtBr) and UiO-66-ILs(INA-EtBr) as analogues of UiO-66-ILs(PCA-EtBr) presented a low yield of 77 % and 67 %, respectively, unveiling that the orientation of carboxyl at monocarboxyl pyridine ligand played a great influence on the catalytic activity. The excellent activity of UiO-66-ILs(PCA-EtBr) was attributed to the synergetic effect of Lewis acidity from MOF nodes for activating C–O bond of epoxide, CO 2 absorption by pyridyl moiety, and nucleophilicity of ILs decoration. In addition, UiO-66-ILs(PCA-EtBr) exhibited a broad scope of epoxide substrate, as well as a great recyclability. Moreover, a possible catalytic mechanism was proposed for CO 2 conversion into cyclocarbonate.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Haorui Liu,Xiaoqiong Wang,Shixun Chen,Shuixia Chen
A novel solid amine adsorbent with interconnect open-cell porous structure was successfully synthesized by crosslinking polyethyleneimine (PEI) with ethylene glycol diglycidyl ether (EGDE) via high internal phase emulsion (HIPE) polymerization. The preparation conditions were optimized. The adsorption performance of the prepared adsorbent for CO 2 was evaluated by fixed bed dynamic adsorption experiment. The results indicated that the optimal adsorbent PEI70K-E-HIPE-8 exhibited a record high CO 2 adsorption capacity of 14.22 mmol/g, amine efficiency of 83% and ratio of breakthrough capacity to equilibrium capacity of 0.92 (abbreviated as Q b /Q e ratio). Both adsorption capacity and adsorption kinetics are much better than those of PEI70K-E-gel-8 prepared without using HIPE template. The adsorbent also showed good CO 2 /CH 4 separation performance, a CH 4 productivity of 54.84 mmol/g could be obtained while using PEI70K-E-HIPE-8 to separated it from a 20 mL CO 2 /CH 4 (20:80, v:v) mixed gas, remarkably higher than that of PEI70K-E-gel-8 (0.28 mmol/g). PEI70K-E-HIPE-8 could keep a stable adsorption and separation performance after at lease 15 adsorption-desorption cycles. The superior CO 2 adsorption capacity and adsorption kinetics make it a promising candidate in practical CO 2 adsorption and CO 2 /CH 4 separation application.
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CHINESE JOURNAL OF CATALYSIS
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2023
·
IF 16.5
Wen Zhang,Cai-Cai Song,Jia-Wei Wang,Shu-Ting Cai,Meng-Yu Gao,You-Xiang Feng,Tong-Bu Lu
Existing artificial photosynthesis systems often underperform due to challenges in water oxidation and extensive photogenerated carrier transfer. Herein, we demonstrate that β- cyclodextrin-decorated CdS nanocrystals (CdS-CD) can simultaneously anchor cobalt tetraphenyl porphyrin (CoTPP) catalysts and alcohol reductants onto CdS surfaces through bidirectional host-guest interactions between β- CD and CoTPP/alcohol. This configuration ensures swift electron transfer from CdS to β -CD bonded CoTPP, facilitating CO 2 reduction to HCOOH. Results showcase a remarkable yield of 1610 μmol g −1 h −1 and a 96.5% selectivity. Meanwhile, photogenerated holes in CdS are efficiently neutralized by β -CD bonded furfuryl alcohol, achieving a furfural yield of 1567 μmol g −1 h −1 and > 99% selectivity. In contrast, the discrete CoTPP-CdS system achieved a HCOOH yield of only 306 μmol g −1 h −1 and a poor HCOOH selectivity of 46.4%. It was also observed that the CoTPP@CdS-CD system maintained high CO 2 -to-HCOOH conversion rates when using other alcohols as reductants.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Yanhong Zhang,Hu Bai,Jiaming Chu,Haiyang Lan,Qi Zhou,Zixian Wang,Weitao Jin,Juan Zhou
A catalyst layer is coated on the fuel electrode in a proton-conducting solid oxide electrolysis cell reactor, which can optimize electrochemical performance and expand the application range of the reactor. In this work, CuO–ZnO catalyst is prepared by oxalate co-precipitation method and combined with a single cell to obtain a reactor with the structure of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) ǀ BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3-δ (BZCYYb) ǀ NiO-BZCYYb (active layer) ǀ NiO-BZCYYb (support layer) | CuO–ZnO (catalyst layer). The electrolysis current density of this reactor with humid air as oxidant and 20%CO 2 –80%H 2 as fuel is 2751 mA cm −2 under 1.3 V at 750 °C. It operates steadily for 138 h under 1.3 V electrolysis at 650 °C, which is better than the reactor without a catalyst layer under this condition. Additionally, CO and CH 4 are detected in the exhaust gas on the fuel electrode side, and the CO selectivity reaches over 90% at 750-550 °C.
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FUEL
·
2023
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IF 7.4
Jing Li,Tingshan Chan,Chuanyong Jing,Jin Wang
Selective conversion of CO 2 to fuels and chemicals has been considered one of the key challenges in the photocatalytic CO 2 reduction reaction. The multi-electron reduction reaction requires the design of photocatalysts that can adsorb CO 2 and transfer electrons. Herein, Cu single atoms are confined in a conjugated microporous polymer (CMP) to construct Cu n @CMP photocatalyst for CO 2 reduction to produce C 2 H 4 and CH 4 . By adjusting Cu loading, Cu 0.012 @CMP exhibited a high performance with production yields of 236.81 μmol·g −1 ·h −1 for C 2 H 4 , and 78.2 % selectivity for C 2 H 4 formation. DFT calculations displayed the band structure and confirmed Cu–N together with characterization. The in situ DRIFTS revealed *CH 2 and *C 2 H 4 as key reaction intermediates to form CH 4 and C 2 H 4 , respectively. The synergy effect in Cu single-atoms and CMP contributed greatly to C–C coupling and interfacial charge transfer, thus achieving excellent activity for conversion of CO 2 to C 1 /C 2 . This work highlights the potential for constructing Cu single atoms on CMP to produce highly selective C 2 H 4 .
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APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Luping Zhang,Xuewei Tu,Yutong Chen,Shouxin Zhu,Can Sun,Yanjiang Song,Hui Zheng
The conversion of CO 2 to cyclic carbonate under mild conditions is an effective strategy to achieve carbon neutrality . This work reports the formation of cyclic carbonates by coupling CO 2 with epoxides using a photothermal catalyst (CoFe 2 O 4 @PDA) with added organic ligands of bimetals under atmospheric pressure, solvent-free, 70 °C and UV light irradiation. The addition of ligands substantially enhanced the photothermal catalytic performance of the catalysts as verified by various characterizations. Subsequent experimental results under optimal conditions showed excellent yields of the catalysts for the conversion of epoxides with different groups to the corresponding cyclic carbonates. The cycling results also indicate good recyclability of the catalyst. This pathway in using light as a driving reaction to fix CO 2 for the synthesis of cyclic carbonate provides a new idea for subsequent photothermal catalytic fixation of CO 2 .
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GREEN CHEMISTRY
·
2023
·Vol. 25
·期 23
·9826-9836
·
IF 9.8
Shuai Liu,Meiting Yang,Ruijia Xu,Xinghe Xiang,Guangming Yang,Haoran Xu,Gang Xiao,Ran Ran,Wei Zhou,Zongping Shao
Efficiently converting CO2 into value-added fuels or chemicals is a significant target for reducing CO2 emissions and achieving carbon neutrality. Solid oxide electrolysis cells (SOECs) are devices where the CO2 reduction reaction (CO2RR) takes place with high efficiency and fast kinetics at high temperatures. Since the CO2RR occurring at the cathode side is a sluggish reaction over whole electrode reactions, it is crucial to develop innovative cathode materials with high activity and good durability. Here, we demonstrate a strategy to synergistically optimize the bulk properties of Sr2Fe1.5Mo0.5O6−δ (SFM) and the morphology of the exsolved nanoparticles (NPs) to enhance the CO2RR activity, electrochemical performance, and durability. The partial replacement with zinc in the Fe-site of SFM not only increases the oxygen vacancy concentration of perovskite bulk and improves the CO2 adsorption capacity, but also passivates in situ exsolution of Fe NPs and improves the active sites on the perovskite surface, thus enhancing CO2 electrolysis performance. A novel cathode, Sr2Fe1.4Zn0.1Mo0.5O6−δ (SFZM01), used in a La0.8Sr0.2Ga0.8Mg0.2O3−δ electrolyte-supported single cell, shows a high current density of 2.74 A cm−2 at 850 °C (1.6 V) and excellent durability when operated at a current density of −1.0 A cm−2 at 750 °C. These findings can guide the development of high-activity and stability catalysts for carbon capture and utilization.
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