JOURNAL OF SURFACTANTS AND DETERGENTS
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2025
·
IF 1.8
Sihang Ma,Yuanyuan Wang,Qingfeng Hou,Yifeng Liu,Xiaoling Yi,Zhuoyan Zhu,Zhidong Chang
CO 2 -responsive switchable microemulsions have attracted significant attention due to their substantial potential in organic synthesis, drug delivery, and nanomaterial preparation. This study presents a microemulsion system composed of N ′-dodecyl- N , N -dimethyl acetamidine, 1-hexanol, brine, and tetradecane. The phase behavior of the microemulsion system was systematically investigated through a salinity scan to access its salinity dependence, while the solubilization ratios were also evaluated. Furthermore, the microstructural characteristics of the microemulsion system were examined using dynamic light scattering, small-angle X-ray scattering, and interfacial tension measurements. A transition from Winsor I to Winsor III, and subsequently to Winsor II, was observed in the alkyl acetamidine surfactant-based microemulsion as salinity increased, with the smallest domain size and most ordered microstructure occurring near the optimal salinity. Notably, the three-phase microemulsion system demonstrated the ability to reversibly switch between emulsification and demulsification upon CO 2 or N 2 injection, showcasing its dynamic responsiveness. This study enhances the understanding of CO 2 -responsive microemulsions and offers potential pathways for sustainable chemical processes. Graphical
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Journal of Energy Chemistry
·
2026
·
IF 15.6
Zhongliang Dong,Wenfa Chen,Ruixi Qiao,Yuyang Long,Meipeng Jian,Mingkai Xu,Zheng Tang,Xuchen Nie,Jun Yin,Yanpeng Liu,Zhiwei Hu,Yinlong Zhu
To realize an ideal photocatalyst for CO 2 photoreduction to CH 4 , developing an “all-in-one” optimization system that targets every elementary step in the photocatalytic CO 2 methanation is highly desirable but remains a great challenge. Here, we present a unique rare-earth modulation strategy to collectively regulate the behaviors of light adsorption, charge separation, reactant supply, and active sites in the photocatalysis process for achieving highly active, selective, stable, and economic CO 2 methanation photocatalysts. Particularly, the proof-of-concept CuPr alloy quantum dots-decorated TiO 2 photocatalysts optimized with rare-earth elements and compositions (denoted as TiO 2 -Cu 7 Pr 1 AQDs) exhibit outstanding photocatalytic activity with a CH 4 production rate of 792.6 μmol g −1 h −1 and electron selectivity of 96.6%, surpassing various state-of-the-art photocatalysts ever reported. Comprehensive experiments and theoretical analysis demonstrate that rare-earth regulation can create multiple advantageous conditions targeting different steps, which enable TiO 2 -Cu 7 Pr 1 to fulfill the essential criteria for an ideal high-efficiency non-noble-metal photocatalyst for CO 2 methanation, including favorable light absorption, enriched reactant supply of CO 2 /H + , rapid carrier separation and transfer, as well as highly active methanation site. The proposed all-in-one design concept in this work not only develops a noble-metal-free photocatalyst with ultrahigh performance toward photocatalytic CO 2 methanation but also provides significant inspiration in various photocatalysis applications.
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Nature Communications
·
2026
·
IF 15.7
Tang Zhiling,Wang Yingli,Qin Tian,Wei Yuechang,Xiong Jing,Wang Xiong,Li Xuanzhen,Liu Min,Liu Yunpeng,Liu Xi,Zhao Zhen
Photocatalytic conversion of carbon dioxide to value-added chemicals, particularly multi-carbon products, offers a promising route toward carbon-neutral cycles. However, achieving high activity and selectivity remains extremely challenging due to the instability of key reaction intermediates and limited C–C coupling efficiency. Herein, we report a low-coordination manganese single-atom catalyst embedded in zinc sulfide (Mn 1 –ZnS v ) that enables efficient and selective CO 2 -to-C 2+ conversion. In-situ spectroscopic analyses and density functional theory calculations reveal that sulfur vacancies are created at the Mn single-atom coordination sites and induce the formation of coordination-unsaturated Mn-S 2 configuration. The asymmetric coordination environment of Mn modulates local charge distribution, strengthens *CO adsorption, and promotes *CO and *CHO coupling to form the *COCHO intermediate for efficient C–C coupling. As a result, the Mn 1 –ZnS v catalyst achieved 99.1% selectivity for ethylene with a formation rate of 76.6 μmol g -1 h -1 . This study highlights the critical role of atomic-level coordination engineering in advancing photocatalytic CO 2 -to-C 2+ conversion.
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PubMed
高影响因子
POWDER TECHNOLOGY
·
2026
·
IF 4.6
Zheng-Hao Li,Li Zhang,Yu-Cui Yang,Xue-Yuan Guo,Ye Sheng,Bing Zhou
In this study, carbon dioxide (CO 2 ) and magnesium oxide (MgO) were employed as raw materials to develop a method for preparing multilayer plate-like magnesium hydroxide (MH) via CO 2 utilization, followed by surface modification with stearic acid (SA). The products were characterized by using Powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR) to analyze their crystal plane distribution, morphology, and functional groups. In addition, thermogravimetric analysis (TGA) was conducted to investigate the decomposition temperatures. Furthermore, molecular dynamics simulations were performed to elucidate the structural arrangement of SA on the MH surface. This work proposes a novel strategy for synthesizing active MH by employing gaseous CO 2 instead of conventional industrial precursors, thereby reducing environmental pollution, lowering production costs, and enabling a milder reaction process. The findings provide theoretical guidance for the subsequent development of cost-effective and environmentally friendly industrial-scale production.
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Advanced Science
·
2026
·
IF 14.1
Zhihong Lin,Kaifang Wang,Ziyi Yuan,Jiali Tang,Xiaozhen Liu,Liu Chen,Lu Shao,Xuezhong He
Mixed-matrix membranes (MMMs) that combine polymers with porous fillers hold promise for scalable CO 2 capture, but their performance is often limited by inadequate polymer-filler compatibility and suboptimal micropore structure. Here we demonstrate a thermal cyclotrimerization strategy that simultaneously tunes the microstructure of PIM-1 and improves continuity at the MOFpolymer interface. Using MAF-stu-1 as a model filler, the resulting thermally rearranged MMMs achieve CO 2 permeabilities above 10 000 barrer with a 2.5-fold increase in CO 2 /N 2 selectivity (from 18 to 46). Sorption measurements, spectroscopy, surface energy analysis, and molecular simulations reveal that cyclotrimerization introduces triazine units that both restrict polymer chain packing and create favorable interfacial interactions with MAF-stu-1, leading to enhanced pore accessibility and molecular discrimination. Importantly, these material-level improvements translate into stronger process performance, reducing the specific CO 2 capture cost by 43.9% compared to the untreated membrane. This work establishes thermal cyclotrimerization as a versatile strategy for engineering robust MMMs, linking interfacial chemistry to process-level outcomes and advancing the development of practical membrane technologies for industrial carbon capture.
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PubMed
高影响因子
LANGMUIR
·
2026
·
IF 3.9
Liyuan Cai,Jingchun Wu,Miaoxin Zhang,Yangyang Hou,Xin Yu,Bo Li,Zhao Yang,Shi Fang,Chunlong Zhang
The development of efficient, environmentally benign surfactants for stabilizing microemulsions in supercritical carbon dioxide (scCO2) remains a significant challenge for enhanced oil recovery (EOR), owing to the historical reliance on fluorinated compounds and the poor stability of conventional surfactants. Herein, we report a fluorine-free supramolecular surfactant system based on a β-cyclodextrin (β-CD) and polyethylene glycol (PEG) conjugate (denoted β-CD-PEG). This conjugate is further functionalized to enable dynamic covalent cross-linking at the interface. The surfactant system leverages host–guest chemistry to anchor the ionic liquid [Bmim][Pro] via inclusion complexation, while the PEG chain ensures scCO2 solubility. The optimized microemulsion achieves an ultralow interfacial tension of 1.8 mN/m and forms a rigid, elastic interfacial film (G′ = 15.3 mN/m) through dynamic covalent cross-linking, ensuring long-term stability (>30 days). Core-flooding experiments demonstrate a reduction in the minimum miscibility pressure by 2.50 MPa and a 17.2% incremental oil recovery. The β-CD-PEG surfactant system also exhibits enhanced selectivity for extracting heavy oil components, leading to a viscosity reduction of up to 45.1% for heavy crude. This work establishes a paradigm for stabilizing complex fluid interfaces in scCO2 using supramolecular, dynamic, and fluorine-free surfactants, with significant implications for green and efficient chemical EOR processes.
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PubMed
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Petroleum Exploration and Development
·
2023
·
IF 7.5
Chunming XIONG,Falin WEI,Haiyang YANG,Song ZHANG,Bin DING,Zhengdong LEI,Deping ZHANG,Qiang ZHOU
A smart response fluid was designed and developed to overcome the challenges of gas channeling during CO 2 flooding in low-permeability, tight oil reservoirs. The fluid is based on Gemini surfactant with self-assembly capabilities, and the tertiary amine group serves as the response component. The responsive characteristics and corresponding mechanism of the smart fluid during the interaction with CO 2 /oil were studied, followed by the shear characteristics of the thickened aggregates obtained by the smart fluid responding to CO 2 . The temperature and salt resistance of the smart fluid and the aggregates were evaluated, and their feasibility and effectiveness in sweep-controlling during the CO 2 flooding were confirmed. This research reveals: (1) Thickened aggregates could be assembled since the smart fluid interacted with CO 2 . When the mass fraction of the smart fluid ranged from 0.05% to 2.50%, the thickening ratio changed from 9 to 246, with viscosity reaching 13 to 3100 mPa·s. As a result, the sweep efficiency in low-permeability core models could be increased in our experiments. (2) When the smart fluid (0.5% to 1.0%) was exposed to simulated oil, the oil/fluid interfacial tension decreased to the level of 1×10 −2 mN/m. Furthermore, the vesicle-like micelles in the smart fluid completely transformed into spherical micelles when the fluid was exposed to simulated oil with the saturation greater than 10%. As a result, the smart fluid could maintain low oil/fluid interfacial tension, and would not be thickened after oil exposure. (3) When the smart fluid interacted with CO 2 , the aggregates showed self-healing properties in terms of shear-thinning, static-thickening, and structural integrity after several shear-static cycles. Therefore, this fluid is safe to be placed in deep reservoirs. (4) The long-term temperature and salt resistance of the smart fluid and thickened aggregates have been confirmed.
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Advanced Materials Interfaces
·
2018
·Vol. 6
·期 2
·1801200
·
IF 4.834
Yutian Wang,Hanjun Hu,Yufan Sun,Yang Tang,Liming Dai,Qing Hu,Adrian Fisher,Xiao Jin Yang
Nanostructure and crystallinity of transition metals play an important role in catalyzing carbon dioxide electroreduction (CO 2 ER) where Cu is a typical electrocatalyst with a wide variety of products and Pb has a high overpotential for H 2 evolution and is selective toward formic acid. In this study, 3D hierarchical nanostructures of Cu–Pb catalyst are prepared by a two-step electrodepositing–annealing–electroreduction approach (EAE). Cu nanowires (Cu NWs) of 200–400 nm diameter are built on the surface of commercial nickel foam substrates through an EAE step. Then, Pb nanoparticles with diameter of 5–10 nm are uniformly created on the surface of Cu NWs by a second EAE step. The nanostructural Cu–Pb electrodes catalyze CO 2 ER at a current density of −9.35 mA cm −2 (at −0.93 V vs reversible hydrogen electrode (RHE)). The H 2 evolution is suppressed by 35.6% and CO and HCOOH are enhanced by 29.6% and 9.2%, respectively, as compared with Cu NWs. The protocol proposed in this study provides a simple and straightforward approach for preparing high-performance, hierarchical nanostructures of Cu–Pb bimetal catalyst for CO 2 ER.
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LANGMUIR
·
2018
·
IF 3.789
Hui He,Hanying Tang,Xingjuan Chen,Xudong Hou,Xiaochong Zhou,Hong Chen,Shanyan Wu,Shuangfei Wang
A novel low-temperature regenerative hydroxy-functionalized hyperbranched polyamine adsorbent (0.16OH-HBPA) for CO2 capture was readily prepared using glutaraldehyde to cross-link amino-terminated hyperbranched polymers (HBP) and functionalized with glycidol, followed by the reduction of the imino groups of 0.16OH-HBPA to alkyl aminos using NaBH4. Here, the HBP has been prepared through the one-pot reaction between pentaethylenehexamine and methyl acrylate. The as-prepared 0.16OH-HBPA adsorbent showed a high adsorption capacity (4.05 mmol/g) for CO2 (concentration, 10%) in the presence of water at 25 °C, and the alkyl amino utilization efficiency reached 73%. More importantly, the CO2-adsorbed 0.16OH-HBPA showed excellent regenerative performance at low temperatures (85 °C, under pure CO2 gas) due to the introduced hydroxyl that can cooperatively adsorb CO2 via the amino groups to form stable carbamic acid. This process suppressed the formation of open-chain urea and cyclic urea and could overcome the disadvantages of high regeneration temperatures (≥90 °C, under pure inert gas) of CO2-adsorbed traditional solid amine adsorbents.
研究领域:
材料科学
·
环境工程
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碳捕集与封存
·
高分子化学
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Research
·
2018
·
IF 0
Jianchao Sun,Yong Lu,Hao Yang,Mo Han,Lianyi Shao,Jun Chen
Na-CO 2 batteries have attracted significant attentions due to their high energy density and effective utilization of greenhouse gas CO 2 . However, all reported Na-CO 2 batteries employ excessive preloaded metal Na, which will lead to safety issues such as dendrite formation and short circuit. In addition, the charging mechanism of reported Na-CO 2 batteries is not very clear. Here we report the Na-CO 2 batteries, starting from the cathode of cheap Na 2 CO 3 and multiwalled carbon nanotubes (CNTs). Due to the effective electron transfer and high reactivity, the decomposition of Na 2 CO 3 and CNTs could take place under 3.8 V. The charging mechanism of 2Na 2 CO 3 + C → 4Na + 3CO 2 without any side reactions is revealed by in/ex situ techniques such as Raman, gas chromatograph, and optical microscope. Dendrite-free Na can quantitatively deposit on the Super P/Al anode because of large specific surface area and low nucleation barrier of the anode for Na plating. The batteries could deliver an energy density of 183 Wh kg −1 (based on the whole mass of the pouch-type batteries, 4 g) with stable cycling performance. This work reveals that safe rechargeable Na-CO 2 batteries could be constructed by cheap Na 2 CO 3 and multiwalled carbon nanotubes.
研究领域:
储能
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电化学
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材料科学
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可持续能源
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AICHE JOURNAL
·
2012
·Vol. 59
·期 1
·215-228
·
IF 2.261
Zhihua Qiao,Zhi Wang,Chenxin Zhang,Shuangjie Yuan,Yaqun Zhu,Jixiao Wang,Shichang Wang
Polyvinylamine (PVAm) was modified using a cross-linking agent containing carriers piperazine (PIP). Attenuated total reflectance fourier transform infrared, elemental analyzer, and X-ray diffraction were used to characterize the PIP-modified PVAm. The PVAm–PIP/polysulfone (PS) composite membrane was developed by coating PVAm–PIP mixed solutions with different mass ratios of PIP/PVAm (m PIP /m PVAm ) on the PS ultrafiltration membrane. The effects of m PIP /m PVAm (from 0.715 to 2.860) in the coating solutions and wet coating thickness on the gas performance of the PVAm–PIP/PS composite membrane were investigated. The PVAm–PIP/PS composite membrane prepared showed higher performance than other membranes reported in the literature due to the large increase of the introducing carrier concentration and low crystallinity. Moreover, the separation performance stability of the PVAm–PIP/PS composite membrane was investigated and no deterioration in the membrane permselectivity was observed. Finally, the economic evaluation of the membrane with the highest performance prepared was carried out. © 2012 American Institute of Chemical Engineers AIChE J, 59: 215–228, 2013
研究领域:
材料科学
·
化学工程
·
气体分离膜
·
高分子化学
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6.3
Yaqi Liu,Yun Ju,Hong Zhang,Jing He,Jie Jiang,Jing Zhao,Mingyi Wang
Sea spray aerosol (SSA) contains abundant anions, which significantly impact CO 2 fixation at the air-water interface in atmospheric microdroplets. However, the underlying molecular mechanism remains unclear. Herein, we simulated SSA using nebulized saltwater microdroplets and investigated the common SSA anions (Cl − , Br − , I − , and SO 4 2− ) intervening in the abiotic carboxylation of succinate with CO 2 at the interface. The combination of online and offline analyses revealed that the SSA anions inhibited the interfacial carboxylation of succinate, with an inhibitory effect inversely proportional to their concentration. Kinetic studies confirmed that the carboxylation reaction occurred at a relatively high rate in the presence of the SSA anions. Furthermore, a mechanistic investigation was performed, which showed that SSA anions inhibited the interfacial carboxylation of succinate by modulating the interfacial electric field. Additionally, the formation of adducts between halogen anions from SSA and succinate suggests a potential pathway for the accumulation of succinate in the early marine environment. This work advances our understanding of air-water interfacial chemistry and provides new insights into prebiotic chemistry in the marine atmosphere.
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