Desalination and Water Treatment
·
2024
·
IF 1
Zhoubing Cheng,Qunpeng Cheng
ABSTRACT In this study, the performance of modified MCM-41 adsorbents by impregnation and grafting modification with 3-aminopropyltriethoxysilane (APTS) and polyethyleneimine (PEI) on the CO 2 adsorption was investigated. The results showed that the synergistic effect of APTS and PEI could improve the adsorption performance and thermal stability of the MCM-41 adsorbents. The CO 2 adsorption capacity of mixed amine-modified MCM-41 adsorbents was higher than single amine modified MCM-41 adsorbents. The maximum adsorption capacity (2.6512 mmol g –1 ) was obtained at MCM-41-APTS-5%-PEI-50%. Meanwhile, the adsorbents modified by mixed amine showed good cycle regeneration stability after five times of CO 2 adsorption/desorption cycling.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2019
·Vol. 26
·期 6
·1831-1838
·
IF 1.947
Mutyala Suresh,Yu Ya-Dong,Jin Wei-Guang,Wang Zhi-Shuo,Zheng Deng-Yue,Ye Chun-Rong,Luo Binbin
Composite material, tetraethylenepentamine (TEPA) incorporated UiO-66 was prepared by impregnation method to study CO 2 capture in a fixed bed reactor, atmospheric pressure. All synthesized adsorbents were characterized using PXRD, N 2 adsorption–desorption isotherms, FT-IR, TGA, SEM, and Elemental analysis. Characterization results have revealed that incorporated TEPA was present within pores of UiO-66. CO 2 adsorption was higher on TEPA incorporated UiO-66 compared to UiO-66. It was due to the chemical interaction between –NH 2 and CO 2 . High CO 2 adsorption capacity 3.70 mmol g −1 was obtained on 30TEPA/UiO-66 at 75 °C, 1 bar. Because of more flexibility and high dispersive nature of TEPA at this temperature. The same CO 2 adsorption capacity was obtained in each adsorption cycle without decomposition of the amine on 30TEPA/UiO-66. Avrami adsorption kinetic model has suggested adsorption of CO 2 on composite material was chemical adsorption and deactivation model suggested an initial rate of adsorption was higher on TEPA incorporated UiO-66.
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
SYNTHETIC METALS
·
2019
·
IF 2.87
Jingyi Zou,Xiaogang Sun,Rui Li,Qiang He
Porous carbon materials are considered potential replacements for metal carriers in Li–SnO 2 batteries. Here, a 3D hierarchical porous carbon nanotube (CNT) scaffold was used as a collector to host SnO 2 . The novel collector comprised Co 2+ -doped porous carbon (PC) slices and a CNT network. The new Co–PC/CNT electrode demonstrated a high loading capacity of SnO 2 , accommodated the volume expansion of SnO 2 , and prevented its aggregation. Co played an important role in improving the initial discharge capacity and coulombic efficiency of the electrode. The SnO 2 –Co–PC/CNT electrodes exhibited outstanding electrochemical performance. The first-discharge specific capacity reached 2067 mAh·g −1 , and the utilization rate of active materials reached 82.92% at a current density of 100 mAh·g −1 . After 100 cycles, the specific discharge capacity remained greater than 698 mAh·g −1 , with a coulombic efficiency of 99.53%.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xiaoli Jin,Jian Cao,Huiqing Wang,Chade Lv,Haiquan Xie,Fengyun Su,Xin Li,Ruixue Sun,Shukui Shi,Mengfei Dang,Liqun Ye
Architecting Z-scheme heterojunction can restrain the recombination of photoinduced carriers to improve the photocatalytic performance. However, it still lacks high-efficiency catalysts for sustainable photoreduction of CO 2 . Herein, an Ag-bridged Z-scheme Bi 4 O 5 Br 2 /AgBr heterostructure is successfully developed, which enables room-temperature CO 2 reduction driven by solar energy. In this catalyst, the Ag mediator acts as a bridge to shuttle electrons between Bi 4 O 5 Br 2 and AgBr, separating the electron-hole pairs efficiently and maintaining the original strong reduction reaction. As a result, Z-scheme Bi 4 O 5 Br 2 /AgBr heterostructures show obviously promoted performance of photocatalytic CO 2 reduction in contrast with pristine Bi 4 O 5 Br 2 , delivering a high CO 2 conversion activity of 6.6 and 1.8 μmol g -1 h −1 for CO and CH 4 products, respectively. This study reports an effective reference of Z-scheme Bi 4 O 5 Br 2 /AgBr heterojunction for satisfactory photocatalytic solar energy conversion and synthesis of high value-added products from CO 2 .
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 6
·2435
·
IF 4.6
Fulin Wang,Zhenzhen Yu,Kaiyang Shi,Xiangwei Li,Kangqiang Lu,Weiya Huang,Changlin Yu,Kai Yang
The green and clean sunlight-driven catalytic conversion of CO2into high-value-added chemicals can simultaneously solve the greenhouse effect and energy problems. The controllable preparation of semiconductor catalyst materials and the study of refined structures are of great significance for the in-depth understanding of solar-energy-conversion technology. In this study, we prepared nitrogen-doped NiO semiconductors using a one-pot molten-salt method. The research shows that the molten-salt system made NiO change from p-type to n-type. In addition, nitrogen doping enhanced the adsorption of CO2on NiO and increased the separation of photogenerated carriers on the NiO. It synergistically optimized the CO2-reduction system and achieved highly active and selective CO2photoreduction. The CO yield on the optimal nitrogen-doped photocatalyst was 235 μmol·g−1·h−1(selectivity 98%), which was 16.8 times that of the p-type NiO and 2.4 times that of the n-type NiO. This can be attributed to the fact that the nitrogen doping enhanced the oxygen vacancies of the NiOs and their ability to adsorb and activate CO2molecules. Photoelectrochemical characterization also confirmed that the nitrogen-doped NiO had excellent electron -transfer and separation properties. This study provides a reference for improving NiO-based semiconductors for photocatalytic CO2reduction.Keywords:NiO;nitrogen doping;photocatalysis;reduction of CO2
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
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2021
·Vol. 38
·期 5
·1032-1042
·
IF 3.309
Xu Li,Qin Yu,Liu Liying,Xiao Juntian,Ding Zhongwei
The membrane contactor has been considered an effective device to capture CO 2 , but its performance is limited by membrane wetting phenomena. In this work, the ZIF-8/ZIF-L (zeolitic imidazolate framework) based composite membrane with excellent hydrophobic stability and CO 2 permeability was successfully fabricated by coating the dense layer on the porous PVDF (polyvinylidene fluoride) substrate. The dense layer was developed by evenly incorporating ZIF-8 nanocrystals and ZIF-L nanosheets into the polydimethylsiloxane (PDMS) polymer. The as-prepared membrane possessed competitive hydrophobicity with a water contact angle (WCA) of 131.8°. And after a ten-day immersion test in CO 2 absorbent, the WCA only declined by 9.8%, exhibiting excellent hydrophobic stability. Besides, the CO 2 permeability of the composite membrane was 61.8×10 −8 ·mol·m −2 ·s −1 ·Pa −1 with an ideal CO 2 /N 2 separation factor of ∺20, which was effectively improved in comparison with the control membrane. In the CO 2 absorption experiment, the prepared membrane achieved the competitive CO 2 flux of 3.02×10 −3 ·mol·m −2 ·s −1 when the liquid velocity was 0.25 m·s −1 and displayed robust long-term operating stability. Finally, the AC impedance technique was applied to continuously monitor the wetting state of composite membranes, which further investigated their anti-wetting ability.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Ting He,Shuang Yao,Dejian Chen,Zhaoyun Sun,Xiaoyun Wang,Keyi Wang,Jiangwei Chen,Qingguo Li,Rizhi Chen,Yawei Wang,Zhaoliang Cui
Membrane oxygenator performs lung function in the Extra-corporeal Membrane Oxygenation (ECMO) system. In the clinical use, to ensure the balance of gas exchange of patient’s body, the gas-blood exchange membrane is required to possess CO 2 /O 2 selectivity, which is suggested to be in the range of 10-12. In our work, the molecular dynamics simulation results displayed that the amino-functionalized Zr-MOFs provides fast transport channels for CO 2 molecules because of the enhancement of the adsorption and diffusion ability for CO 2 . Therefore, we chose organic ligands with abundant CO 2 -philic groups to synthesize target amino-functionalized Zr-MOFs, and then dispersed them into medical-grade PDMS solution to study the separation performance of CO 2 /O 2 . On the basis of constructing anti-leakage coating layer, biomimetic gas channels were designed to increase the clearance rate of CO 2 . Experimental results exhibited that the CO 2 /O 2 selectivity of (NH 2 ) 2 -UiO-66/PDMS MMM was as high as 11.19, which was basically consistent with the simulation results. The obtained amino-functionalized Zr-MOF/PDMS coating layer displayed favorable biocompatibility and biosafety. Meanwhile, the construction of biomimetic channel solves the difficult problem of CO 2 removal in PMP membrane, which verifies the feasibility of applying porous materials to gas-blood exchange membranes in the ECMO system.
研究领域:
材料科学
·
生物医学工程
·
分子动力学模拟
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 35
·19681-19686
·
IF 12.732
Zhongjie Yang,Caoyu Yang,Jianyu Han,Wenshi Zhao,Shengxian Shao,Siyu Li,Huiwen Gao,Haijiao Xie,Xiaofei Zhang
Selective electrochemical CO2 reduction to formic acid is an appealing strategy to achieve efficient utilization of CO2. Modification of the catalytic interface with organic linkers has been proven to promote the conversion of CO2 to CO, but the highly selective generation of formic acid is still a challenge. Herein, modification of the interface of graphene oxide (GO) with amide linkages to anchor SnO2 nanoparticles is presented to catalyze the CO2 reduction reaction (CO2RR). As expected, the as-synthesized SnO2/tert-GO shows a competitive high cathodic faradaic efficiency (FE) of 84.4% for formate at −0.96 V and shows long-term stability for the CO2RR. Further, density functional theory (DFT) calculations indicated that amide linkages facilitate the conversion of CO2 to formate.
研究领域:
电化学
·
材料科学
·
催化
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Energies
·
2024
·Vol. 17
·期 11
·2758
·
IF 3
Qi Liu,Yangwen Zhu,Hang Ye,Haiying Liao,Quanqi Dai,Michelle Tiong,Chenggang Xian,Dan Luo
Carbon capture, utilization, and storage (CCUS) technology has emerged as a pivotal measure in mitigating global climate change. Notably, CO2-EOR is esteemed for its dual function of sequestering CO2and enhancing oil recovery. However, this process presents challenges related to asphaltene deposition during CO2flooding, leading to reservoir damage, such as pore plugging. This study systematically manipulated the factors inducing CO2-induced asphaltene deposition, elucidating the mechanisms and magnitudes of asphaltene precipitation. Additionally, the study investigated the efficacy of carbon quantum dots (CQDs) in mitigating asphaltene deposition. Experimental findings indicated a positive correlation between asphaltene deposition and level of asphaltene content, CO2injection ratio, and temperature. Moreover, with an increase in experimental pressure, the asphaltene deposition rate demonstrated an initial increase followed by a subsequent decline. Leveraging their favorable compatibility with asphaltene, CQDs effectively suppressed the aggregation behavior of asphaltene. In the presence of CQDs, the onset of asphaltene precipitation was delayed from 45 V% to 55 V%, with the highest inhibition rate reaching approximately 36% at an optimal CQD concentration of 20 mg/L. This study proposes a novel approach to address asphaltene deposition issues in CO2-EOR processes, contributing to the enhancement of recovery rates in low-permeability reservoirs.
研究领域:
石油工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2016
·Vol. 18
·期 11
·3370-3377
·
IF 8.506
Wenjing Yang,Haiyang Cheng,Bin Zhang,Yan Li,Tong Liu,Mingli Lan,Yancun Yu,Chao Zhang,Weiwei Lin,Shin-ichiro Fujita,Masahiko Arai,Fengyu Zhao
The hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL) was studied with a homogeneous RuCl2(PPh3)3 catalyst in supercritical CO2 (scCO2). The conversion of LA was observed to increase with CO2 pressure and the possible reasons for this rate acceleration were discussed, including the molecular interactions of CO2 with the reacting and catalytic species as well as the acidity and phase behavior of the reaction mixture. The interaction between CO2 and RuCl2(PPh3)3 was significant, which resulted in the production of an active RuHCl(CO)(PPh3)3 complex and thus enhanced the rate of hydrogenation in the presence of CO2.
研究领域:
化学工程
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Optical Materials
·
2024
·
IF 0
Zhiwei Wang,Qiuying Wang,Qin Liu,Suwit Suthirakun,Wongsathorn Kaewraung,Peng Jiang,Hang Zhao,Xin Xin,M. A. Subramanian
Blue pigments and blue glazes play crucial roles in our daily life. Ongoing research into blue pigments aims at environmentally friendly compositions with a lower cost. In this work, Co-doped BaAl2Si2O8 pigments were synthesized by a solid-state method. The blue color of the pigments is due to the 4A2(4F) → 4T1(4P) transitions allowed by doped Co2+ in the tetrahedral coordination of the structure. The pigments exhibit excellent stability under both acidic and alkaline conditions. When combined with transparent glazes, BaAl2–xCoxSi2O8 demonstrates satisfied compatibility, resulting in blue glazes with a significant reduction in Co content compared with existing formulations. Furthermore, BaAl2–xCoxSi2O8 blue glazes possess a simple production route, commendable color performance, and cost-effectiveness.
研究领域:
材料科学
·
无机化学
·
环境科学
✓ 已验证
DOI
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Yang Li,Zhaojian Zeng,Yuanming Zhang,Yong Chen,Wenjing Wang,Xiaoming Xu,Mengyang Du,Zhaosheng Li,Zhigang Zou
Photothermal catalytic reduction of CO2 is a powerful way to promote carbon neutralization goals. However, there are few reports on the deactivation of the photothermal CO2 reduction reaction. Here, we observed an interesting deactivation phenomenon of photothermal CO2 conversion over TiO2–xHx (black TiO2). Despite the presence of a reducing atmosphere of H2, the oxygen vacancy concentration of TiO2–xHx is reduced, resulting in the deactivation of photothermal CO2 reduction. After Ni is modified onto TiO2–xHx, Ni can activate H2 to form Hs, and the oxygen vacancy concentration of Ni/TiO2–xHx may be maintained, thus solving the deactivation problem in photothermal CO2 hydrogenation.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）