JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jia Li,Wentao Liu,Yang Li,Zhi Liu,Yang Liu
A series of hierarchical flower-like CdS/carbon quantum dots/NiAl-LDH (CCL) photocatalyst have been successfully prepared to achieve efficient conversion of CO 2 -to-CO via a simple yet effective hydrothermal method. In the CCL, interspersed-CQDs not only increase the number of reactive sites but also reduce inner electronic impedance with the assistance of light reflecting-scattering effect. This significantly improves electron migration efficiency and inhibits the recombination of photoinduced electron-holes pairs. Without any sacrificial agent or photosensitizer, the sample of CCL-1 exhibits the highest CO evolution rate of 7.04 μmol·g −1 ·h −1 in water under simulated sunlight illumination with a large specific surface area (129.15 m 2 g −1 ) and an appropriate CQDs content of 15.2 wt%, which is 12.8- and 11.2-fold higher than those of pristine LDH, pure CdS, and many previously reported LDH-based counterparts. A type-Ⅱ interfacial charge transfer mechanism is proposed, where electrons migrate rapidly from CdS to LDH with highly-interspersed CQDs as unhindered electron conduction bridges. The present work outlines a simple and controllable LDH-based heterojunction, which give rise to superior photocatalytic activity for CO 2 photoreduction.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Lulu Zhao,Jinguo Wang,Ruifang Yan,Shuo Wang,Ziyi Liao,Hongli Yang,Dongjiang Yang,Huilin Hou,Weiyou Yang
BiOCl-based materials have emerged as promising photocatalysts for converting CO 2 into valuable products and fuels. However, challenges such as low light absorption and inefficient charge carrier separation require effective solutions, with vacancy engineering offering a promising approach. Current research primarily focuses on anion vacancies, leaving cation vacancies less explored. In contrast, this study presents a novel method to enhance visible-light-driven photocatalysts by Bi cation vacancies in ultrathin BiOCl nanosheets through a straightforward hydrochloric acid etching process (HAE-BiOCl). These introduced Bi vacancies not only expand the light absorption range and enhance carrier separation, but also serve as active sites for CO 2 adsorption. Additionally, Bi vacancies can effectively lower the activation energy of COOH − species and thereby enhance overall reaction activity. As a result, the HAE-BiOCl catalyst exhibits exceptional photocatalytic CO 2 reduction performance without the need for co-catalysts or sacrificial agents. It achieves high CO generation rates of 68.39 and 17.43 µmol g −1 h −1 under 300 W Xe lamp and visible light irradiation, respectively. These rates are significantly higher compared to counterparts without vacancy creation and surpass those of most reported Bi-based photocatalysts. This study underscores the potential of inducing cation vacancies via acid etching as a valuable strategy for advancing photocatalysis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Hairong Wu,Kunpeng Hou,Guorui Xu,Genglin Li,Jiawei Chang,Tianfang Luan,Wenhao Shao,Jirui Hou
The CO2-responsive Pickering emulsions employed have garnered considerable attention across enhanced oil recovery agents, delivery of crude, and oilfield-produced fluid treatment. This study focuses on the design of an innovative type of Janus nanoparticle (JNP) and its application in the construction of CO2 stimuli-responsive Pickering emulsions. The emulsion stabilized by JNPs demonstrates swift phase separation subsequent to the injection of CO2. Furthermore, the mechanism of the CO2-stimulated responsiveness enabled by the JNPs was proposed. Based on the Schiff reaction, the synthesis of JNPs was achieved successfully via the Pickering emulsion template method. The properties of the JNPs were studied using various analytical techniques such as Fourier transform infrared, thermogravimetric analysis, scanning electron microscopy, transmission electron microscopy, etc. The developed responsive system, composed of JNPs and sodium oleate surfactant, showed high interfacial activity at the oil/water interface. The study revealed that the responsive system-stabilized Pickering emulsions could remain stable at 70 °C and room temperature for 24 and 120 h, respectively. Furthermore, the introduction of CO2 for 1.5 min resulted in phase separation because the nanoparticles lost the amphiphilic nature, triggering a significant decrease in interfacial activity and the protonation of sodium oleate surfactant inactivation. Then, the particles started to desorb from the interface. This study proposes a convenient, simple, and cost-effective approach for preparing fast CO2-responsive Pickering emulsions. It provides novel insights into the advancement of oilfield-produced fluid treatment, transportation of crude oil, and enhanced oil recovery.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ting He,Shanshan Zhang,Yang Zhu,Jiangwei Chen,Xiaoyun Wang,Qingguo Li,Rizhi Chen,Wenbo Pei,Xin Chen,Haibao Duan,Zhaoliang Cui
Extracorporeal CO 2 removal (ECCO 2 R) is a type of extracorporeal life support (ECLS) technology. It aims to remove carbon dioxide (CO 2 ) from small flow of the blood and correct hypercapnia and related acidosis. The ECCO 2 R system removes CO 2 retained in the patient’s body through the gas-blood exchange membranes, which in use, blood flows on the outside of the membrane, and the inside of the membrane is for gas flow. Existing ECCO 2 R system generally improves the emission rate of CO 2 by the increase of the gas flow rate. However, there is a problem that O 2 is simultaneously taken out, which will reduce the blood O 2 concentration. Therefore, the gas-blood exchange membranes should not only increase the CO 2 removal rate by the improvement of CO 2 /O 2 selectivity, but also retain more O 2 in the blood and then maintain the oxygen saturation of the blood. In present work, a method was proposed to fabricate COF-5/Pebax mixed matrix membranes (MMMs) on the PMP surface for enhancing CO 2 /O 2 selectivity, which was increased from 0.96 to 5.57. The CO 2 removal ability of COF-5/Pebax MMM was tested by blood circulation, and it was found that the CO 2 removal effect was increased 10.9% than that of the pristine membranes. The O 2 concentration was maintained at a higher level, about 1.69 times that of the pristine membranes. In contrast to the pristine PMP membrane, blood compatibility of COF-5/Pebax MMMs was improved because protein adhesion decreased by 44.75%. The results of cytotoxicity test and rabbit pyrogen test exhibited that the prepared COF-5/Pebax MMM presented great biosafety. Overall, the proposed COF-5/Pebax MMM has good performance in ECCO 2 R system and attractive potential for medical application.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xue Yang,Yuxuan Wang,Jingxian Hua,Rujing Hou,Jinfeng Chen,Qihan Gong,Chongqing Wang,Yichang Pan
Plate-like or sheet-like porous materials with nanometer thickness have been considered as the preferred fillers to improve mixed-matrix membranes (mmms)-based separation. Herein, hexagonal Co-fa (HG-Co-fa) nanoplates were simply synthesized without the addition of any modifier and used as fillers to construct 6FDA-DAM-based MMMs for efficient CO 2 /CH 4 separation. HG-Co-fa nanoplates exhibit high dispersion and interface compatibility in 6FDA-DAM matrix. The results demonstrated that the CO 2 /CH 4 separation performance of 6FDA-DAM was obviously improved after the incorporation of HG-Co-fa nanoplates. The resultant MMMs with nanoplate loading of 10 wt% showed CO 2 /CH 4 selectivity of 27 and CO 2 permeability of 1419 Barrer at 25 ℃ and 0.2 MPa, surpassing 2008 Robeson upper bound. Meanwhile, the high lattice integrity and structural stability of HG-Co-fa nanoplates contribute to the excellent thermal and mechanical stability of MMMs, contributing to their anti-plasticization property up to 14 bar and long-term stability up to 240 h, indicating their potential for natural gas separation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Hangyu Li,Yang Gu,Xiaoyuan Zeng,Kai Ding,Haotian Tan,Peng Dong,Yanjia Zhang,Jie Xiao
Due to the high theoretical energy density, lithium-carbon dioxide (Li-CO 2 ) batteries provide unique advantages when using CO 2 to generate electricity. However, the issues with lithium dendrite generated by uneven deposition and quick cathode passivation continue to impede the development of Li-CO 2 batteries. In this work, a Janus separator with dual functionalities is created using an in-situ growth and hydrothermal technique. It can be used to expand the cathode to alleviate the quick passivation of the cathode, in addition to inhibiting the growth of lithium dendrite. On the one hand, as an ion transport framework, Prussian blue (PB) nanocubes formed in-situ on the anode side can control the uniform transport of Li-ions and prevent the proliferation of lithium dendrites. The Prussian blue and reduced graphene oxide composite material (PB-rGO) on the cathode side, on the other hand, can be employed as an extension of the cathode, which not only contains more discharge products but also encourages their decomposition, playing a self-cleaning role. Moreover, the Li||Li symmetrical battery with Janus separator exhibits a steady cycle life of more than 1700 h. Also, when applied to a Li-CO 2 battery, it demonstrates an extremely high discharge capacity of 12100 mAh g −1 and an exceptionally long cycle life of 3144 h.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Fan Wu,Chengwei Zhou,Yonggong Tang,Jiangang Han,Weinan Xing,Guangyu Wu,Yudong Huang
Solar-driven photocatalytic CO 2 reduction to clean hydrocarbon fuels offers great potential for mitigating the greenhouse effect and energy crisis. However, achieving high selectivity and efficiency in visible-light-driven CO 2 -to-CH 4 conversion remains a major challenge. In this work, a series of nickel-doped cobalt phosphide photocatalysts (NiCoP) with varying doping mass ratios were prepared using ZIF-67 as the precursor. The NiCoP photocatalyst exhibited a unique and regular nanoflower-like spherical structure, making it suitable for visible-light-driven CO 2 reduction. The research demonstrated that, compared to CoP, the synthesized Ni-doped CoP photocatalyst exhibited superior photocatalytic performance in CO 2 reduction, particularly in terms of CH 4 product selectivity. Among the tested catalysts, NiCoP-4 displayed the highest performance, achieving CO and CH 4 production rates of 599.00 and 3458.00 µmol h −1 g −1 , respectively. The regular nanoflower-like spherical structure offers enhanced accessibility to active sites and improved charge separation/transfer efficiency, significantly reducing the charge transfer distance. This work provides a theoretical foundation for the development and application of novel nanoflower-like spherical photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2024
·
IF 14.3
Likun Luan,Yingfang Zhang,Xiuling Ji,Boxia Guo,Shaoyu Song,Yuhong Huang,Suojiang Zhang
Multi-enzymatic cascade reaction provides a new avenue for C─C coupling directly from CO 2 under mild conditions. In this study, a new pathway with four enzymes including formate dehydrogenase (PaFDH), formaldehyde dehydrogenase (BmFADH), glycolaldehyde synthase (PpGALS), and alcohol dehydrogenase (GoADH) is developed for directly converting CO 2 gas molecules to ethylene glycol (EG) in vitro. A rhodium-based NADH regeneration electrode is constructed to continuously provide the proton and electron of this multi-enzymatic cascade reaction. The prepared electrode can reach the Faradaic Efficiency (FE) of 82.9% at −0.6 V (vs. Ag/AgCl) and the NADH productivity of 0.737 mM h −1 . Shortening the reaction path is crucial for multi-enzymatic cascade reactions. Here, a hydrogen-bonded organic framework (HOF) nano-reactor is successfully developed to immobilize four enzymes in one pot with a striking enzyme loading capacity (990 mg enzyme g −1 material). Through integrating and optimization of NADH electro-regeneration and enzymatic catalysis in one pot, 0.15 mM EG is achieved with an average conversion rate of 7.15 × 10 −7 mmol CO 2 min −1 mg −1 enzymes in 6 h. These results shed light on electro-driven multi-enzymatic cascade conversion of C─C coupling from CO 2 in the nano-reactor.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2024
·Vol. 14
·期 9
·590
·
IF 3.8
Jingwen Zhang,Wentian Zhou,Junying Chen,Yingwei Li
Halide perovskite has shown great potential in photocatalysis owing to its diversity, suitable energy band alignment, rapid charge transfer, and excellent optical properties. However, poor stability, especially under humid conditions, hinders their practical application in photocatalysis. In this work, we report the encapsulation of inorganic–organic hybrid perovskite QDs into MIL-101(Cr) through an in situ growth strategy to prepare a series of MAPbBr3@MIL-101(Cr) (MA = CH3NH3+) composites. The perovskite precursors, i.e., MABr and PbBr2, were successively introduced into the pores of MOF, where the perovskite quantum dots were self-assembled in the confined environment. In photocatalytic CO2reduction, 11%MAPbBr3@MIL-101(Cr) composite displayed the best performance among the composites with a total CO and CH4yield of 875 μmol g−1in 9 h, which was 8 times higher than that of the pure MAPbBr3. Such high gas production efficiency could be maintained for 78 h at least without structural and morphologic decomposition. The remarkable stability and catalytic activity of composites are mainly due to the synergistic effect and improved electron transfer between MAPbBr3and MIL-101(Cr). Moreover, these composites revealed a novel mechanism, showing switched CH4selectivity with the controlling of the perovskite location and contents. Those with perovskites encapsulated in the mesopores of MIL-101(Cr) were more preferential for CO production, while those with perovskites encapsulated in both meso- and micropores could produce CH4dominantly.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Ganghua Zhou,Yun Chen,Gaoran Chen,Hangmin Xu,Weiqin Yin,Bin Wang,Xingwang Zhu,Xin Ning,Paul K. Chu,Xiaozhi Wang,Hui Xu
Metal-organic frameworks (MOFs) with abundant pores are excellent adsorbents for metal ions. However, the subsequent treatment of used MOFs and their reutilization still lack promising solutions. Herein, the surface-restructured Mn-doped Cu 2 O (RM-Cu 2 O) catalyst containing asymmetric Mn−Cu sites is prepared by glucose reduction using the spent Cu-based MOF (HKUST-1) as the precursor. The RM-Cu 2 O catalyst shows good potential in tunable photocatalytic syngas (CO and H 2 ) production in a pure water system. The syngas ratios can be tuned from ∼1:2 to ∼1:1 by increasing CO production. DFT calculations and photoelectrochemical tests confirm that the asymmetric Mn−Cu sites on the RM-Cu 2 O catalyst accelerate the photogenerated charge transport and optimize CO 2 adsorption and activation. In situ irradiation X-ray photoelectron spectroscopy is conducted to investigate the dynamic charge transport and reactions on the RM-Cu 2 O catalyst. Based on in situ Fourier transform infrared spectroscopy and simulations, the mechanism of photocatalytic syngas production is elucidated. This work provides a promising solution for the resource utilization of the spent MOFs-based adsorbents and photocatalytic energy development.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2024
·
IF 3.7
Wei Zhao,Chi Fan,Li Liu,Xiaohui Ma,Bin Feng
Functionalized ionic liquids have great potential for capturing CO 2 in mixed absorbents due to their unique structural and adjustable properties. In this work, a novel, highly efficient, and renewable non-aqueous absorbent of amino-functionalized ionic liquid, [TETAH][3-Br-PhO]-PEG200, is utilized for CO 2 capture. Here we mixture [TETAH][3-Br-PhO] and PEG200 in different proportions and studied the effects of reaction temperature, mass ratios, and the interaction between [TETAH][3-Br-PhO] and PEG200 on CO 2 absorption capacity. Based on the experimental results, the mechanism of CO 2 capture by [TETAH][3-Br-PhO]-PEG200 is elucidated using 13 C NMR and FTIR spectroscopy. The results indicate that at 298.15 K and a mass ratio of 3:7, the designed absorbent achieves an optimal effective absorption capacity of 2.37 mol/kg. The interaction between [TETAH][3-Br-PhO] and PEG200 enhances the CO 2 capture capacity of [TETAH][3-Br-PhO]-PEG200 and leads to the formation of a solid phase. After five cycles of absorption and desorption at 393.15 K, the optimal absorbent still maintains excellent recyclability and achieves a 72 % regeneration efficiency. Additionally, the non-aqueous absorbent of [TETAH][3-Br-PhO]-PEG200 exhibits high absorption performance and efficient recyclability compared to the traditional MEA. These findings suggest that [TETAH][3-Br-PhO]-PEG200 shows promise as a sustainable CO 2 absorbent material.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Xuewu Gao,Gaojie Yan,Mengke Li,Haifeng Ji,Shengli Chen,Yi Feng,Hemi Qu,Beibei Dong,Xiaojie Zhang
Research on ionic porous organic polymers (iPOPs) for photocatalytic carbon dioxide (CO 2 ) reduction has shown promising progress over the past decade, but improving their catalytic performance in CO 2 reduction remains a challenge. In this work, neutral monomer 2,6-dimethyl-γ-pyrone (DMPy) is employed into iPOPs (Py-POPOH) via Aldol condensation, where acidic conditions could not only catalyze the reaction, but also convert DMPy from quinoid structure to phenol-based pyrylium. The cationic sites facilitate the electrostatic adsorption of CO 2 , while the phenol structures aid in electron delocalization across the pyrylium, thereby broadening the photoresponse range and increasing the charge separation efficiency. Moreover, the phenolic hydroxyl intensifies the interaction with CO 2 through hydrogen bonds, leading to improved photocatalytic performance. The resultant Py-POPOH exhibits significant advancement in light absorption, extending to 792 nm, and achieves a high CO 2 to CO conversion rate of 237.75 µmol g -1 h −1 as metal-free photocatalysts, almost 6 times higher than that of phenol-free structure. This result demonstrates the potential of iPOPs in improving photocatalytic performance, and provides a way to further improve the design of photocatalysts.
✓ 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）