ANALYST
·
2020
·Vol. 145
·期 10
·3528-3534
·
IF 3.978
Zhijian Mai,Hao Li,Yixun Gao,Yue Niu,Yongrui Li,Nicolaas Frans de Rooij,Ahmad Umar,M. S. Al-Assiri,Yao Wang,Guofu Zhou
A tetraphenylethylene (TPE) derivative (N,N-dimethyl-N′-(4-(1,2,2-triphenylvinyl)phenyl)acetimidamide, TPE-amidine) was designed and synthesized, and used to prepare visible CO2 chemosensors, TPE-amidine-L (liquid) and TPE-amidine-S (solid). The hydrophilicity of TPE-amidine thoroughly changed because of the unique reversible reaction between the amidine group and CO2, which controlled the molecular aggregation extent in water by CO2. Combining with the well-known aggregate-induced emission effect, the highly selective CO2 chemosensor TPE-amidine-L was developed, which has the lowest CO2 detection limit of 24.6 ppm compared with other reported CO2 chemosensors, and can be regenerated within 10 s by adding triethylamine. With the aim of being safer and more convenient to use, a polyacrylamide hydrogel containing TPE-amidine was prepared as a renewable CO2 sensing “tape” (TPE-amidine-S). The flexibility, adhesivity, CO2 sensitivity and reversibility of the “tape” is systematically investigated, showing great potential for “on-site” and “real-time” CO2 detection in practical applications.
研究领域:
化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Greenhouse Gas Control
·
2015
·
IF 3.946
Xia Wang,Qingjie Guo,Jun Zhao,Linlin Chen
A CO 2 sorbent was prepared by immobilizing a mixture of tetraethylenepentamine (TEPA) and 2-amino-2-methyl- l -propanol (AMP) onto MCM-41. The prepared composites were characterized by N 2 adsorption–desorption, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA) techniques. CO 2 adsorption–desorption experiments were conducted in a self-assembled fixed bed reactor under the simulated flue gas component of 15 vol.% CO 2 /85 vol.% N 2 . The promoting effects of AMP on the adsorption performance and amine efficiency of TEPA modified MCM-41 were studied. In addition, the effects of the adsorption temperature and the feed flow rate on the CO 2 adsorption process were investigated. Further, the regenerability of the sorbent was studied by performing fifteen adsorption–desorption cycles over the temperature range of 70 °C (adsorption) to 100 °C (desorption). Among the prepared sorbents, MCM-41 modified with 30 wt.% TEPA and 30 wt.% AMP (MCM-41-TEPA30%-AMP30%) showed rapid adsorption kinetics and the maximum CO 2 adsorption capacity of 3.01 mmol-CO 2 /g-sorbent at 70 °C. Moreover, the MCM-41-TEPA30%-AMP30% sorbent exhibited good regenerability and thermal stability. The results demonstrate that the MCM-41-TEPA30%-AMP30% sorbent is a promising CO 2 sorbent.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Qi Gao,Xingguang Xu,Shuai Liu,Athumani Omari Mmbuji,Yunkun Wu
CO2 foam has been identified as having significant applications in carbon capture utilization and storage (CCUS). This is attributed to its proven capability to mitigate channeling during CO2 injection effectively; meanwhile, the majority of injected CO2 can be safely stored in reservoirs through geo-sequestration. However, the high injection pressure and poor foam stability severely affect the wide employment of CO2 foam flooding. In this study, comprehensive investigations on a novel CO2-responsive foam (CRF) with desirable injectivity and noticeable longevity are presented. This novel foam system employs lauryl ether sulfate sodium (LES) and diethylenetriamine (DETA) as foaming agents, and it exhibits notable reversible CO2-responsive properties. This property enables the fluid to transit between low and high-viscosity states, enhancing foam injection performance and reducing the injection pressure. CRF is less detrimental to reservoirs compared to conventional polymer-enhanced foam (PEF) due to its ability to switch between gel-forming and gel-breaking phases using CO2/N2. In addition, rheological tests demonstrate that CRF exhibits superior high shear tolerance compared to PEF. Moreover, CRF shows greater stability and higher salt resistance compared to PEF. At a NaCl concentration of 5 × 104 mg/L, the half-life of CRF (152 min) was nearly 13 times longer than that of PEF (11 min). It is noted that CRF exhibits a higher resistance factor in high-permeability cores compared to low-permeability cores, indicating its outstanding capacity to block the channels and mitigate CO2 breakthrough. The results of the enhanced oil recovery (EOR) experiments indicated that CRF is capable of displacing more oil than PEF in fractured cores with identical experimental conditions. It is believed that CRF may be applied as a viable CCUS technique and may enlighten investigations on novel CCUS strategies.
研究领域:
石油工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ziyi Li,Jia Xiong,Hang Song,Shuchang Liu,Yufei Huang,Yangqiang Huang,Geoffrey I. N. Waterhouse,Ziyun Wang,Yu Mao,Zhiwu Liang,Xiao Luo
To enhance the photocatalytic efficiency of ZIF-67 (Zeolitic Imidazolate Framework-67), we integrated it with Ti 3 C 2 T x MXene through in-situ synthesis and assessed the effects of different MXene concentrations on photocatalytic activity. We identified ZIF-67/Ti 3 C 2 T x MXene as the optimal catalyst (denoted as ZT-450), yielding CO, CH 4 , and H 2 at 62.7, 6.7, and 7.3 μmol g −1 , respectively. The CO productive rate achieved by ZT-450 exhibits a substantial enhancement, outperforming both ZIF-67 and Ti 3 C 2 T x by factors of 16.1 and 4.8, respectively. After introducing Ti 3 C 2 T x in ZIF-67, CO 2 adsorption ability achieves 127.90 μmol g −1 , much higher than those of pure ZIF-67 and Ti 3 C 2 T x . Combining Density Functional Theory (DFT) calculations, we established that introducing Ti 3 C 2 T x in ZIF-67 facilitates rapid electron transfer and improves light absorption, CO 2 activation. In-situ DRIFTS measurements of photocatalytic CO 2 reduction reaction (CO 2 RR) on ZIF-67/Ti 3 C 2 T x MXene composite were employed to reveal the emergence of intermediates such as *COOH, *CHO, *OCH 3 , etc ., and elucidate the mechanism accordingly. This research contributes to the advancement of photocatalytic CO 2 RR, offering insights into applying Ti 3 C 2 Tx MXene in photocatalysis.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Shaocan Dong,Weiqiu Huang,Xufei Li,Xinya Wang,Baoyou Yan,Zhen Zhang,Jing Zhong
In response to global climate change, most countries have set carbon reduction targets. Mixed matrix membranes (MMMs), which combine the characteristics of inorganic nanofillers and organic matrices, have received wide attentions because of their good permeability and selective performance for the separation of CO 2 from industrial waste gases. However, the poor dispersion, compatibility and interfacial defects often lead to poor gas separation performance. In this paper, according to the dissolution-diffusion and Lewis acid-base theories, inorganic filler of amino-functionalized Bentonite (APTES-Bentonite) with -NH 2 was firstly synthesized to improve the affinity of CO 2 . Then, the dual-functionalized MMMs of APTES-Bentonite/PVDF (A-B/P MMMs) was prepared and adopted for the separation of CO 2 /CH 4 and CO 2 /N 2 , showing the increase of 87.76% and 75.31% compared to the pristine PVDF membrane, respectively. These excellent performances were attributed to the synergistic effect of APTES-Bentonite with -NH 2 groups and PVDF with -F groups, which provide a dual-functional transport pathway for CO 2 molecules due to the interactions of host-guest. Overall, the customized A-B/P MMMs offer superior CO 2 separation performance, which provides some valuable references for large-scale CO 2 capture studies.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Xingyu Lin,Hongsheng Lu,Ruoxin Zhang,Yingjiang Chen,Li Wang,Baiwen Huang
Underground CO2 storage is a key strategy for mitigating climate change by reducing greenhouse gas emissions. However, the heterogeneity of reservoirs poses challenges to effectively storing CO2 in designated spaces. In this study, an environmentally friendly CO2-responsive ionic liquid (IL) DA-Ch was synthesized by choline hydroxide (Ch) and dodecanedioic acid (DA) at a 2:1 mol ratio. The innovative system enhances the sweep efficiency and storage capacity of CO2 by enabling the transition of DA-Ch ILs aqueous solution from low-viscosity liquids (0.5 mPa·s at 0.1 mol/L) to solid microparticles upon CO2 introduction. After CO2 injection, DA precipitated again from the DA-Ch ILs aqueous solution with a volume mean particle size of micrometers, even under high-salinity conditions. This phase transition effectively plugs preferential flow channels, expanding CO2 storage space by 82% compared to conventional CO2 flooding. Our findings propose a novel, sustainable approach to address gas channeling challenges in subsurface CO2 storage, offering dual benefits for carbon sequestration and enhanced oil recovery.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of CO2 Utilization
·
2019
·
IF 5.189
Weiqi Liu,Zhichao Miao,Zhenbin Li,Xiaozhong Wu,Pengfei Zhou,Jinping Zhao,Huahua Zhao,Weijiang Si,Jin Zhou,Shuping Zhuo
A series of Co@N-C materials are synthesized from pyrolysis of ZIF-67 at different temperatures and employed as catalyst for electrochemical reduction of CO 2 (CO 2 RR) to syngas. Through a systematical investigation of the relationship between structure of Co@N-C catalysts and their catalytic activity, it could be found that the Co species exposed on the material surface mainly promote the hydrogen evolution reaction (HER) process to produce H 2 , while the Co particles packaged by N-C skeleton provide electrons and transfer them to CO 2 molecule through the Co -N- C skeleton, promoting the CO 2 reduction reaction. Following this thinking, the pristine Co@N-C materials are treated by aqua regia to remove the surface exposed Co species. After acid treatment, the affinity of H species sharply decreases, and adsorption of CO 2 and transfer of electron to CO 2 are successfully improved. The acid-treated Co@N-C catalysts exhibit improved catalytic activity, faradic efficiency of CO, and stability in CO 2 RR process. Among all these catalysts, the obtained Co@N-C-700-A shows highest CO 2 reduction activity and stability, achieving a specific current of 25 A∙g (cat) −1 and a productivity of 0.266 mol (CO) h −1 ∙ g(cat) −1 at a mild potential of -0.57 V vs. RHE. The ratio of CO/H 2 in products could be adjusted in the range of 1/4 to 1.5/1.
研究领域:
材料科学
·
电化学
·
催化
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Shumin Hong,Ting Li,Min Xiao,Teerawat Sema,Hongxia Gao,Zhiwu Liang
The concept of phase change absorbents has been widely studied as a novel and low-energy consumption option for CO 2 capture. This work screened diethylene glycol dimethyl ether (DGM) from 17 physical solvent species as a better phase change accelerator for absorbents of 2-(methylamino)ethanol (MAE)-physical solvent-H 2 O. Then, the optimized mass ratio of 30:49:21 for MAE-DGM-H 2 O solution was investigated with phase change behaviors, CO 2 absorption–desorption performance, cyclic capacity, and energy consumption. The experimental results showed that the cyclic CO 2 capacity reached 1.32 mol/L and the CO 2 -rich phase made up only 50.4 % of the total volume for the 30 wt%MAE-49 wt%DGM-21 wt%H 2 O, as well as its regenerative energy consumption was 40 % lower than that of 30 wt% monoethanolamine (MEA) solution. Also, the viscosity and surface tension gap of the CO 2 -rich phase and CO 2 -lean phase for the optimized absorbent were studied. It was observed that those gaps increase with the increasing mass ratio of DGM. In addition, the possible phase change mechanism was proposed by using the dipole moment values of components calculated by Gaussian (B3LYP/6-31G) coupled with 13 C NMR spectra.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2022
·Vol. 12
·期 34
·2201675
·
IF 29.698
Wenbo Liu,Xin Sui,Changkun Cai,He Huang,Rui Xu,Dongsheng Geng,Mingyang Chen,Jun Lu
Mg-CO 2 batteries, which exploit the greenhouse gas CO 2 as cathode active species, are an appealing next-generation battery candidate due to their high efficiency energy storage and value-added CO 2 utilization. However, compared with other metal-CO 2 systems, few aprotic Mg-CO 2 batteries have been reported so far as a result of several crucial problems including the comparatively slow redox reaction kinetics, a large decomposition energy barrier of the reduction products, and poor reversibility in their multi-electron three-phase cathodic reactions in nonaqueous environments. Herein, a rechargeable Mg-CO 2 battery is developed by using a Mo 2 C-CNTs catalytic cathode, a nonaqueous electrolyte, and a magnesium metal anode. The Mo 2 C-CNTs catalytic cathode can greatly reduce the charge overpotential of the Mg-CO 2 battery through tuning the CO 2 reduction pathways. The results of a variety of ex situ and in situ experiments as well as theoretical calculations show the Mo 2 C catalyst not only induces surface molecular adsorption for faster reaction kinetics but also improves the selectivity toward MgC 2 O 4 in the CO 2 reduction process for a higher Faraday efficiency. An exceptional low voltage hysteresis is achieved for the Mg-CO 2 battery. This work demonstrates a promising strategic option for rechargeable nonaqueous Mg-CO 2 batteries for simultaneously addressing energy and environmental issues.
研究领域:
能量存储
·
电池技术
·
材料科学
·
电化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jiajing Zhang,Suwei Wang,Pin Song,Ang Li,Wei Jiang,Jun Di
The insufficient solar light response ability of the photocatalyst, rapid recombination of interface charges, and lack of active sites significantly inhibit the efficiency of photocatalytic CO 2 reduction. Addressing these challenges simultaneously is a very challenging task. Herein, an interface engineering coupled surface polarization strategy is proposed to optimize the CO 2 photoreduction performance. The copper tetracarboxyphenylporphyrin (CuTCPP) modified BiOBr/Bi 19 S 27 Br 3 (BBS) heterostructure was developed. The built-in electric field formed between BiOBr and Bi 19 S 27 Br 3 interfaces induces the effective interfacial charge separation, while the surface polarization of CuTCPP induces the transfer of electrons from the conduction band (CB) of BBS to the CB of CuTCPP. Benefiting from this unique configuration and abundant active sites in CuTCPP, greatly improved photocatalytic CO 2 reduction performance can be realized. Without adding cocatalysts and sacrificial agents, the optimized CO generation performance of CuTCPP-BiOBr/Bi 19 S 27 Br 3 (BBS-CT) is 3.5 times higher than that of BBS. This work provides valuable insights of interface engineering coupled surface polarization strategy for collaborative improve the photocatalytic CO 2 reduction performance.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
ZhiWei Dong,YaLing Jia,Zeyu Wang,Antony Rajendran,Wen-Ying Li
Electrocatalytic CO2 reduction to formic acid is a promising strategy to obtain value-added chemicals and achieve the carbon cycle. However, its practical application is generally impeded by the limited accessibility of CO2 to the catalyst's surface and the lack of efficient universal catalyst across different pH levels. Herein, we report a new catalyst, i.e., SnS2 decorated with hydrophobic polymer polyvinylidene fluoride (SnS2+PVDF), for the effective electrocatalytic CO2 reduction to formate/formic acid across a wide pH range in a flow cell. This catalytic system accomplishes a remarkable Faradaic efficiency for the formic acid production in alkaline (98%), neutral (86%), and acidic (93%) electrolytes. Also, the single-pass carbon efficiency reaches up to 72.77% in acidic electrolyte. Water contact angle measurements in association with the in-situ attenuated total reflectance surface-enhanced infrared absorption spectroscopy results indicate that the inclusion of PVDF creates a hydrophobic microenvironment which increases the CO2/H2O ratio near the surface of SnS2 particles. As a consequence, SnS2 particles enjoy the enhanced CO2 concentration around their surface to form many three-phase (solid-liquid-gas) boundary. In-situ Raman spectra combined with electrocatalytic studies reveal that SnS2 undergoes reconstitution to form catalytically active Sn/SnS2 during the reaction. These findings ensure and expand the generality of hydrophobic microenvironment regulation strategy in promoting electrocatalytic CO2 reduction to formic acid.
研究领域:
化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 3
·540
·
IF 3.164
Qiang Li,Yanling Wang,Fuling Wang,Qingchao Li,Forson Kobina,Hao Bai,Lin Yuan
The low viscosity of pure liquid CO2hindered the development of CO2fracturing technology. A modified silicone polymer was prepared as a CO2thickener to investigate the effect of temperature, pressure, shear rate and thickener content (wt.%) on the apparent viscosity and rheology of thickened liquid CO2. In addition, CO2fracturing capacity was evaluated with the numerical simulation of extended finite element. The results displayed that an apparent viscosity of up to 1.3 mPa·s at 303 K and 18 MPa was attained over liquid CO2using the thickener of 3 wt.% and Toluene of 9 wt.% as additives. Compared to the commercial linear polydimethylsiloxane, a better apparent viscosity was obtained from the mixture of this prepared thickener, Toluene and CO2. The apparent viscosity decreases with increasing temperature and shear rate. By contrast, an improving apparent viscosity was revealed with an increase in the pressure from 8 to 14 MPa and thickener content from 1 to 3 wt.%. The rheological index decreased with increasing thickener content with pressure but the rise in temperature led to an increasing rheological index. The mesh structure theory of the thickener, CO2and Toluene molecules was in this paper gives a good explanation for the discrepancy between CO2viscosity with the thickener content, temperature, pressure, or shear rate. Compared to pure CO2, the numerical simulation of CO2fracturing demonstrated an excellent fracturing capacity by using the thickened CO2fracturing fluid in shale reservoirs. This investigation could provide the basic reference for the development of CO2fracturing technology.Keywords:polydimethylsiloxane;CO2thickener;CO2fracturing technology;oil and gas development engineering
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）