SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Xiaoqian Li,Dechao Wang,Hailong Ning,Yangyang Xin,Zhongjie He,Fangfang Su,Yudeng Wang,Jing Zhang,Hongni Wang,Liwei Qian,Yaping Zheng,Dongdong Yao,Mingtao Li
Porous liquids (PLs), as a novel liquid sorbent with permanent porosity, still present challenges such as high viscosity and melting temperatures. Herein, an efficient electrostatic repulsion strategy is proposed to engineer zeolitic imidazolate frameworks (ZIFs) type III PLs employing ZIF-8- g -BPEI nanoparticle stability dispersed into BPEI. The viscosity and melting temperatures of ZIF-8- g -BPEI PLs could be tailored via control particle size, grafting polymer, and concentration of porous nanoparticles . The existence of BPEI on the surface of ZIF-8- g -BPEI facilitates the stable dispersion of ZIFs nanoparticles in BPEI via the electrostatic repulsion as well as enhances CO 2 adsorption capacity of PLs. Moreover, the CO 2 adsorption amount of ZIF-8- g -BPEI-30 PLs is 6.5 times high than that of neat BPEI, suggesting the permanent free volume of ZIFs is retained in their corresponding PLs. Benefiting from the branched structure of BPEI grafted onto the outer surface of ZIFs , ZIF-8- g -BPEI-10 PLs remain liquified down to -71.1 °C, together with viscosity as 1.7 Pa·s −1 at 25 °C. Therefore, the electrostatic repulsion strategy opens an effective avenue to prepare novel liquid materials and shows numerous potential applications in gas adsorption and separation.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Wenjin Wang,Zhi Li,Shuaihua Zhang,Xiumin Yang,Chun Wang,Zhi Wang
A novel nanoporous carbon (NPC) was constructed by utilizing the porous aromatic framework-6 (PAF-6) as both the template and carbon source along with KOH as a chemical activator. The newly-synthesized PAF-6 derived nanoporous carbon (PAF-6-NPC) was then employed as a solid-phase microextraction (SPME) fiber coating. Coupled with gas chromatography-flame ionization detection, the PAF-6-NPC fiber-based SPME method exhibited large enhancement factors, low limits of detection, good linearity and acceptable repeatability for the determination of some n -alkanes in various water and soil samples. The method recoveries for the n -alkanes were in the range of 89.5–102.9% for water and 86.0–104.5% for soil samples, respectively. The PAF-6-NPC coated fiber showed no obvious decrease of the extraction efficiency for the analytes after 100 replicate extractions. The PAF-6-NPC fiber-based SPME method was successfully applied for the determination of n -alkanes in water and soil samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2024
·
IF 7
Zhe Li,Xiaosui Luo,Abid Naeem,Zhengji Jin,Qiong Li,Yongmei Guan,Lihua Chen,Weifeng Zhu,Liangshan Ming
Polyvinylpyrrolidone K30 was used as the templating agent, and ammonium bicarbonate was used as the pore-forming agent to make porous mannitol and porous lactose by the template and pore-forming agent method, respectively. Compared with the template method, the porous particles prepared by the pore-forming agent method have larger pore diameter (320.276 nm and 250.528 nm) and specific surface area (1.018 m 2 /g and 0.913 m 2 /g). The molecular docking results showed that mannitol/lactose interacted with curcumin and adhered to each other through hydrogen bonding. The adsorption kinetics process of porous mannitol and porous lactose prepared by template agent, pore-forming agent and curcumin were different. Among the curcumin-loaded porous particles prepared by the two methods, the curcumin-loaded porous lactose prepared by the pore-forming agent method had the fastest release rate and the highest cumulative release rate (95 %). Curcumin releases consistent with the Peppas release kinetics model and the diffusion mechanism.
研究领域:
药剂学
·
生物材料学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Yingchun Guo,Lei Feng,Changcheng Wu,Xiaomei Wang,Xu Zhang
Rational design and fabrication of metal–organic framework (MOF)-derived ordered hierarchical macro-/meso-/microporous N-doped carbon materials featured with the atomically dispersed metal atoms can effectively enhance their catalytic performance. Herein we develop a template-assisted strategy, namely the confined growth and pyrolysis of single-crystalline zeolite imidazolate framework-8 (ZIF-8) in three-dimensional ordered template voids, to create hierarchical porosity in MOFs-derived N-doped carbon materials. The as-synthesized single-atom Zn on N-doped hierarchically ordered porous carbon polyhedrons (Zn-N-HOPCPs) show integrated Lewis acid (single-atom Zn) and base sites (pyridinic N), high surface area (1128 m 2 ·g −1 ), large pore volume (0.90 cm 3 ·g −1 ), periodically interconnected open windows (~55 nm), highly accessible micro/mesopore channels (0.55, 0.8, 1.2, and 4 nm), and abundant Zn content (5.8 wt%). The hierarchical nanoarchitecture (macro-/meso-/micropores) significantly facilitates mass transfer for bulky-molecule-involved reactions and exposes inside active sites, resulting in satisfactory CO 2 photoconversion under mild conditions. The strategy presented here sheds light on the design and fabrication of various hierarchically ordered porous carbon decorated with atomically dispersed metal atoms for other important applications.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Meixia Wang,Jing Zhang,Xibin Yi,Xinfu Zhao,Benxue Liu,Xiaochan Liu
In this study, chitosan was used to prepare nitrogen-doped carbon aerogels (CAs) anchored by ZIF-8 derived porous carbon (ZIF-8-C) using a facile in-situ deposition method combined with subsequent carbonization. CAs possessing a 3D mesoporous structure with interlaced nanosheets can be used as the skeleton for growth of ZIF-8 derived microporous carbon. The coexistence of mesopores and micropores can not only create more channels for electrolyte ions accessing, but also can provide electrical-double-layer capacitance. The results of electrochemical performance revealed that the ZCCA composite electrode shows the large specific capacitance of 241.6 F/g at a current density of 0.5 A/g in 2.0 M KOH electrolyte and superior cycle performance (capacity retention of 90% after 5000 cycles). The improvement in the electrochemical properties is owed to its hierarchically porous structure, ultrahigh specific surface area and moderate nitrogen contents. The preparation method offers the smart design of CAs-supported MOF-derived material for high-performance energy storage applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 3
·664
·
IF 3.426
Deng Wang,Ying Wang,Jing Yang,Xiu He,Rui-Jie Wang,Zhi-Song Lu,Yan Qiao
The flavin-based indirect electron transfer process between electroactive bacteria and solid electrode is crucial for microbial fuel cells (MFCs). Here, a cellulose-NaOH-urea mixture aerogel derived hierarchical porous carbon (CPC) is developed to promote the flavin based interfacial electron transfer. The porous structure of the CPC can be tailored via adjusting the ratio of urea in the cellulose aerogel precursor to obtain CPCs with different type of dominant pores. According to the electrocatalytic performance of different CPC electrodes, the CPCs with higher meso- and macropore area exhibit greatly improved flavin redox reaction. While, the CPC-9 with appropriate porous structure achieves highest power density inShewanella putrefaciensCN32 MFC due to larger active surface for flavin mediated interfacial electron transfer and higher biofilm loading. Considering that the CPC is just obtained from the pyrolysis of the cellulose-NaOH-urea aerogel, this work also provides a facile approach for porous carbon preparation.Keywords:cellulose;porous carbon;hierarchically porous structure;microbial fuel cells;interfacial electron transfer
研究领域:
环境科学
·
材料科学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Yaoyu Pan,Ruisi Li,Peihang Li,Yun Wang,Yalin Zhu,Ziqiang Xu,Xueqin Chen,Zhengguang Sun,Cao Li,Bingbing Jiang
Porous organic polymers with well-defined nanoporous structure and superior specific surface area exhibited vigorous materials potentials, especially in various separation cases. While maintaining functional properties and uniform porosity, more applicable fabrications of a large-scale device with improved structural and mechanical flexibility are highly desired. Herein, we report a facile strategy to fabricate a flexible, large-sized nanoporous membrane based on amino-functionalized hypercrosslinked polymer nanoparticles (AHCPNPs) which possesses an excellent CO 2 capture capacity and oil-water separation efficiency. The crosslinked PVA/nanoparticles (CPVANPs) membrane, composed of polyvinyl akohol (PVA) and high content of AHCPNPs (80 w%), was prepared via electrospinning technology and post-crosslinking of PVA chain segment by p- phenyldiisocyanate. The CPVANPs membrane with decimete scale displays a well-defined fibre structure, hierarchical porous structure, impressively high mechanical strength (136.8 MPa) with a specific surface area up to 258.3 m 2 g −1 and an extremely high capacity of 35.4 w% (8.1 mmol g −1 ) for CO 2 capture. Another advantage is in the aspects of efficient oil-water adsorption and/or separating from high viscosity oils (55.9 g g −1 for castor oil) and emulsified oil (97% SE). The fabrication may exploit a new avenue in designing large-sized, flexible and hierarchical nanoporous membranes for gas and oil-water separation.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 6
·2178-2187
·
IF 7.367
Xueqin Li,Changlong Hao,Bochong Tang,Yue Wang,Mei Liu,Yuanwei Wang,Yihua Zhu,Chenguang Lu,Zhiyong Tang
Due to their high specific surface area and good electric conductivity, nitrogen-doped porous carbons (NPCs) and carbon nanotubes (CNTs) have attracted much attention for electrochemical energy storage applications. In the present work, we firstly prepared MWCNT/ZIF-8 composites by decoration of zeolitic imidazolate frameworks (ZIF-8) onto the surface of multi-walled CNTs (MWCNTs), then obtained MWCNT/NPCs by the direct carbonization of MWCNT/ZIF-8. By controlling the reaction conditions, MWCNT/ZIF-8 with three different particle sizes were synthesized. The effect of NPCs size on capacitance performance has been evaluated in detail. The MWCNT/NPC with large-sized NPC (MWCNT/NPC-L) displayed the highest specific capacitance of 293.4 F g−1 at the scan rate of 5 mV s−1 and only lost 4.2% of capacitance after 10 000 cyclic voltammetry cycles, which was attributed to the hierarchically structured pores, N-doping and high electrical conductivity. The studies of symmetric two-electrode supercapacitor cells also confirmed MWCNT/NPC-L as efficient electrode materials that have good electrochemical performance, especially for high-rate applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Xiaoyu Lou,Xiaoyan Chen,Duanlian Tang,Qiong Wang,Yukun Tian,Menghan Tu,Yupeng Wang,Changshen Ye,Jie Chen,Ting Qiu
Hierarchical porous carbons equipped with heteroatoms and diffusion pores have a wide application prospect in adsorption. Herein, we report N-autodoped porous carbons (PTPACs), which were derived from rigid N-rich conjugated microporous poly(aniline)s (CMPAs) and show their all-around applicability in heavy metal adsorption. Their molecular structure could be delicately tuned from 3D organic networks to graphitic carbons through simply adjusting the pyrolysis temperature, affording unique hybrid features of hierarchical micro-meso-macroporosity and amount-tunable nitrogen defects, as validated by the enhanced CO2 adsorption capacities reaching 5.0 mmol g–1, a 230% increase compared to the precursor (2.15 mmol g–1). They therefore show promising a Langmuir adsorption capacity of 434.8 mg g–1 toward mercury ions, which could be rapidly achieved within a short 20 min. Based on the comprehensive experimental, characterization, and DFT calculation studies, we rationally reveal these impressive adsorptions arise from the hybrid function of chemisorption contributed by populated nitrogen defects and physical adsorption achieved by synergistic functions in the diffusion and storage pores. Outcomes mark the high merits of PTPACs in addressing recent global challenges in environmental engineering.
研究领域:
环境工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wenting Zhu,Wenting Li,Zhongtian Li,Yanhui Lu,Jieping Fan,Hua Xiong,Hailong Peng
In this study, magnetic porous carbon microsphere composed of molecularly imprinted nanofibers (MPCM@MINs) were constructed and used as an adsorbent for the highly efficient extraction of Brilliant Blue (BB) in food samples. The MPCM@MINs contained imprinted nanofibers and a three-dimensional hierarchical porous structure with a magnetic responsive ability, resulting in a high surface area (368.3 m 2 ·g −1 ), low mass-transfer resistance, large adsorption capacity, and fast separation ability. The maximum adsorption capacity of MPCM@MINs for BB was 39.47 mg·g −1 with excellent selectivity and a high imprinting factor (6.12). Moreover, MPCM@MINs exhibited good anti-interference ability, reusability and reliability. Importantly, BB can be easily and rapidly detected in food samples using MPCM@MINs as an adsorbent followed with UV–Vis method, and the relative standard deviation was lower than 5.85%. Therefore, MPCM@MINs may be a promising adsorbent for pollutant extraction in food samples due to the combination of different strategies of nanofibrous imprinting, magnetic separation, and hierarchical porous structure.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
Waste and Biomass Valorization
·
2025
·
IF 2.8
Zeng Fanen,Lv Qi,Zhang Yaning,Lu Lu,Xu Bing
The practical application of hierarchical porous carbon materials in supercapacitors (SCs) promoted the development of a simple and sustainable preparation method. Plane tree seed-based porous carbon (PBC) was synthesized using static air activation with plane tree seeds as precursors and their hierarchical porous structure was regulated by controlling the reaction temperature. The physicochemical properties of the produced PBCs were characterized through scanning electron microscopy, X-ray diffraction, Raman spectroscopy, N 2 adsorption–desorption, X-ray photoelectron spectroscopy, and energy dispersive X-ray spectroscopy. The optimized hierarchical porous carbon materials obtained at an activation temperature of 700 °C possessed a high specific surface area, an optimal hierarchical porous structure dominated by mesoporous structures, and functional groups containing N and O for doping. The formation and evolution of hierarchically porous structures during static air activation were described in detail. In a three–electrode system, the optimal PBC exhibited the highest specific capacitance of 187.05 F g −1 at 0.5 A g −1 . Moreover, the constructed symmetric SC achieved a high energy density of 11.03 Wh kg −1 at a power density of 250 W kg −1 and exhibited remarkable electrochemical stability (100% over 7000 cycles at 10 A g –1 ). It can be predicted that static air activation might be a simple and sustainable method widely used for preparing carbon materials with high energy storage and conversion efficiency. Graphical
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Qirui Guo,Chong Chen,Fangcheng Xing,Weizhong Shi,Jie Meng,Hui Wan,Guofeng Guan
Nitrogen-doped hierarchical porous carbons with a rich pore structure were prepared via direct carbonization of the poly(ionic liquid) (PIL)/potassium ferricyanide compound. Thereinto, the bisvinylimidazolium-based PIL was a desirable carbon source, and potassium ferricyanide as a multifunctional Fe-based template, could not only serve as the pore-forming agent, including metallic components (Fe and Fe3C), potassium ions (etching carbon framework during carbonization), and gas generated during the pyrolysis process, but also introduce the N atoms to porous carbons, which were in favor of CO2 capture. Moreover, the hierarchically porous carbon NDPC-1-800 (NDPC, nitrogen-doped porous carbon) had taken advantage of the highest specific surface area, exhibiting an excellent CO2 adsorption capacity and selectivity compared with NDC-800 (NDC, nitrogen-doped carbon) directly carbonized from the pure PIL. Furthermore, its hierarchical porous architectures played an important part in the process of CO2 capture, which was described briefly as follows: the synergistic effect of mesopores and micropores could accelerate the CO2 molecules’ transportation and storage. Meanwhile, the appropriate microporous size distribution of NDPC-1-800 was conducive to enhancing CO2/N2 selectivity. This study was intended to open up a new pathway for designing N-doped porous carbons combining both PILs and the multifunctional Fe-based template potassium ferricyanide with wonderful gas adsorption and separation performance.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）