Journal of CO2 Utilization
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2022
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IF 8.321
Jinsong Shi,Hongmin Cui,Jianguo Xu,Nanfu Yan,Shengyong You
Influences of porous carbon’s physicochemical properties on CO 2 adsorption vary with CO 2 pressure. The clarification of such complicated influences will undoubtedly be beneficial to the design and synthesis of carbonaceous adsorbents. To this end, in the current work we synthesized a series of N-doped hierarchically ordered micro-mesoporous carbons (NHOMCs). Ordered mesoporous polymer was synthesized with a solvent-free method using F127 as the soft template. After removing F127, the polymer was activated with KHCO 3 in the presence of urea at 700–800 °C. The obtained NHOMCs inherited the ordered structure of the polymer, and exhibited high surface area and nitrogen content. Synergistic effects of urea and KHCO 3 on nitrogen content and textural properties were discussed and revealed. At 25 °C, high CO 2 uptakes of 4.02 mmol/g (1 bar) and 15.42 mmol/g (20 bar) were achieved by the NHOMCs. We then systematically investigated the correlation between CO 2 uptake and physicochemical properties. The decisive factors of CO 2 uptakes at different pressures (1 bar, 5 bar, 10 bar, 20 bar) were analyzed. We believe the current work will provide helpful insights into the research of porous carbons for CO 2 adsorption.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
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IF 4.2
Danni Ye,Fengfeng Gao,Guoliang Zeng,Xingfang Zhang,Xiaogang Hao,Jun Li,Zhong Liu,Zhiyong Ji
An electroactive bismuth oxybromide/polyvinylidene difluoride/carbon black(BiOBr/PVDF/CB) composite film electrode was fabricated that had a bromide ion trap (Br–-trap) effect obtained by prereleasing of Br– under reduction potential. The Br–-trap BiOBr/PVDF/CB film electrode was used for the selective extraction of Br– from salt lake brine by electrochemically switched ion exchange (ESIX) technology. Moreover, an industrially scalable ESIX pilot system was designed and the effects of different process parameters were investigated. In the ESIX system, the obtained film electrode exhibited efficient adsorption quantity, and remarkable selectivity owing to its special ion trap effect. The extraction capacity of Br– reached 67.10 mg g–1 with the separation factors of 2.06 and 7.13 for Br–/Cl– and Br–/NO3–, respectively, and the desorption efficiency of the film electrode remained at 95.4% after seven repeated cycles. It manifested that the pilot system with the Br–-trap BiOBr/PVDF/CB film electrode is expected to provide a novel direction for practical industrial Br– extraction.
研究领域:
电化学
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材料科学
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环境工程
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DOI
高影响因子
WATER RESEARCH
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2024
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IF 11.4
Yafeng Liu,Shan Ni,Wenjie Wang,Yue Zhao,Yuan Meng,Huizhou Liu,Liangrong Yang
Efficient uranium capture from wastewater holds great importance for the environmental remediation and sustainable development of nuclear energy, but it is a tremendous challenge. Herein, a facile and scalable approach is reported to fabricate functionalized hierarchical porous polymers (PPN-3) decorated with high density of phosphate groups for uranium adsorption. The as-constructed hierarchical porous structure could allow rapid diffusion of uranyl ions, while abundant phosphate groups that serve as adsorption sites could provide the high affinity for uranyl. Consequently, PPN-3 shows a high uranium adsorption uptake of 923.06 mg g −1 and reaches adsorption equilibrium within simply 10 min in uranium-spiked aqueous solution. Moreover, PPN-3 affords selective adsorption of uranyl over multiple metal ions and possesses a rapid and high removal rate of U(VI) in real water systems. Furthermore, this study offers direct polymerization strategy for the cost-effective fabrication of phosphate-functionalized porous organic polymers, which may provide promising application potential for uranium extraction.
研究领域:
环境科学
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材料科学
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化学工程
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核能
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2021
·Vol. 413
·期 27
·6813-6821
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IF 4.157
Ma Liang,Zhu Yindi,Chen Xueming,Fang Raohao,Chen Yuru,Xu Xia,Huang Guozheng,Liu Zi,Liu Xiang
Nano-magnetite with superparamagnetism could be coated by some organic compounds or by nano Au or Pt via surface modifications with multi-step reactions for the applications of isolating histidine-tagged (His-tagged) proteins. Introducing active sites of binding histidine onto the surface of nano-magnetite was the ultimate task. However, multi-step treatments might result in departure of the coatings from the surface of the nano-magnetite, which led to loss of active sites. In this work, we reported a convenient and efficient way of treating nano-magnetites and applied them in isolating His-tagged proteins. Carboxylates were introduced on the surface of home-made nano-magnetite directly via ultrasonic mixing with sodium bitartrate rather than complicated surface modifications, which was proved by thermogravimetric analyses. Ni 2+ was, therefore, caught by the carboxylates of the coating via the coordinate interaction, demonstrated by X-ray photoelectron spectra. The coated magnetic nanoparticles with the bonded Ni 2+ were successfully employed to selectively bind and separate recombinant His-tagged proteins directly from the mixture of Escherichia coli cell lysate, and showed wonderful affinity for His-tagged proteins with the saturated adsorption amount being 556 mg g −1 . Additionally, such functionalized nano-magnetite manifested the excellent recyclability in isolating His-tagged proteins. Graphical abstract
研究领域:
纳米技术
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生物化学
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蛋白质工程
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分子生物学
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产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
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2020
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IF 7.539
Yusheng Fu,Xiangyu Li,Zhixin Yang,Xiaofei Duan,Zhiling Ma,Bing Han
A simple low-temperature partial-oxidation process was demonstrated as an effective technology for reed straw modification towards environmental remediation. At an optimal temperature of 180 °C, the straw materials exhibited a remarkable colour change from light yellow to dark brown, increased methylene blue (MB) uptake by 1.8 times, enhanced removal efficiency from 34.5% to 92.8%, and a high yield of 77.2%. Spectroscopic characterization and Boehm titration proved that the amount of surface oxygen (O)-containing functional groups significantly increased after modification. A strong linear correlation (R 2 = 0.93) existed between total amounts of O-containing functional groups and MB uptake for modification temperatures below 180 °C, whereas blockage of the pore entrances and competition with metallic cations must be taken into account for samples generated from excess heating (>180 °C). These results provided insights into designing promising technologies for sustainable environmental management through reutilization of agricultural waste.
研究领域:
环境科学
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材料科学
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农业废弃物管理
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产品关联
DOI
PubMed
高影响因子
FUEL
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2022
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IF 8.035
Yi-Ming Gu,Ya-Hui Wang,Sheng-Sheng Zhao,Hong-Jun Fan,Xiao-Wei Liu,Zhiping Lai,Shu-Dong Wang
Carbon capture from flue gases is one of the crucial routines for reducing current CO 2 emissions and mitigating the greenhouse effect. Metal-organic frameworks (MOFs) have received a lot of interest as efficient solid adsorbents for CO 2 /N 2 separation in flue gas treatment. However, many MOF materials are susceptible to the presence of water vapor, which has a significant impact on their adsorption efficacy and moisture stability. Here in this work, we reported two pillar-layered Zn-MOFs with N -donors, i.e., Zn 2 (TRZ) 2 (Fuma) and Zn 2 (TRZ) 2 (BDC), which demonstrated high CO 2 uptakes (3.92 and 1.52 mmol/g) and CO 2 /N 2 (132 and 20.5) adsorption selectivities at 298 K and 101 kPa, among the best comprehensive results reported by far. After seven days of exposure to a 100 % RH environment, it was found that, the Zn-N pillar contributes to the robust structure of MOFs . Furthermore, in-depth theoretical calculations indicated the guest-framework interactions, and dynamic sorption tests confirmed high working capacities (2.78 and 1.14 mmol/g), sufficient water stability and remarkable cycling performance of the studied MOFs under humid ambient conditions. We believe this work provides a routine to prepare robust and promising candidates to address the challenge in carbon capture under humid conditions.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2020
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IF 3.871
Yaju Chen,Qinggang Ren,Xiaojing Zeng,Leiming Tao,Xiantai Zhou,Hongbing Ji
Multifunctionalization of porous organic polymers (POPs) for working in concert on a substrate is now a research topic in CO 2 catalysis, yet it remains challenging. This work describes a pre- and post-synthetic strategy to design metalloporphyrin-based azo-hierarchical porous ionic polymers (ZnTPP/QA-azo-PiPs), which were synthesized based on diazo-coupling reaction of tetra(4-aminophenyl) porphyrin zinc with tri/diphenols in aqueous solution under mild conditions, followed by etherification with quaternary ammonium bromide. This synthetic approach endows ZnTPP/QA-azo-PiP 1 with features of an improved surface area (181 m 2 /g), hierarchical porosity, and high-density active sites. ZnTPP/QA-azo-PiP 1 presented a noteworthy CO 2 uptake of 1.77 mmol/g at 273 K and 1.0 bar and good CO 2 /N 2 selectivity of 44.8. As expected, ZnTPP/QA-azo-PiP 1 showed quantitative conversion and selectivity for a range of epoxides under mild conditions (1.0 MPa, 80 °C, 12 h) in the CO 2 cycloaddition reaction. ZnTPP/QA-azo-PiP 1 could been recycled easily and retained complete retention of activity and selectivity for over 7 cycles. Moreover, with efficacious activity in conversion of diluted CO 2 (15% CO 2 in 85% N 2 , v/v), ZnTPP/QA-azo-PiP 1 could smoothly catalyze CO 2 -involved reaction to produce oxazolidinones and N-formylated amines under mild conditions. This work promotes sustainable synthesis of advanced multifunctional POPs and gives great promise for their application in synthetic transformations of CO 2 .
研究领域:
材料科学
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化学工程
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催化
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环境科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Zhi Hu,Shucheng Liu,Nana Tang,Xuan Zhang,Jianming Pan
The main obstacles of recognition of flavoniods are low concentration and complexity of extract wastewater solutions. The structural and stability limitation of the sorbents is the significant reason for the difficulty in increasing the adsorption amount in the separation system. Hereon, a novel hierarchical-pore boronic acid-functionalized-MOFs based on macroporous organo/hydro copolymers (CPs@H-UiO-66-NH 2 @BA) were firstly fabricated through the triple sacrificial cross-linking strategy, which allowed the formation of multiple hydrogen bond networks (i.e. main crosslinked networks and weak crosslinked networks) at oil–water interface. Noticeably, the MOFs with polymer chain entanglement effects as a physical sacrificial cross-linking network, significantly enhancing the mechanical properties. The maximum equilibrium binding capacity of CPs@H-UiO-66-NH 2 @BA was 40.93 µmol g −1 for NRG at 308 K. Furthermore, it also showed superior regeneration capacity capability (only 7.81% loss) after six cycles. Meanwhile, they had a stronger selectivity towards NRG. It can effectively purify the low purity of the actual sample ground to 92.68%. It is anticipated that in-situ the introduction of nanoboronic-functionalized MOFs construction into copolymers would hold great promise in the selective capture of target flavonoids in actual samples.
研究领域:
材料科学
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化学工程
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分析化学
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
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2022
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IF 7.34
Zongying Zhang,Qinze Liu,Tingting Gao,Congde Qiao,Jinshui Yao,Changbin Zhang
Alkaline lignin, a by-product of the paper-pulping process, can undergo phenolation by pyrogallol in the presence of acetone and sulfuric acid to prepare phenolated-alkaline-lignin (PAL). PAL can be further reacted with tetraethylenepentamine (TEPA) to prepare lignin-based catecholamine (PAL-TEPA), which exhibits excellent ability to remove hazardous Cr (VI) from simulated wastewater. In this study, PAL and PAL-TEPA were systematically investigated by SEM, FT-IR, 1 H NMR, TGA, and XPS. The conditions for the preparation of PAL and the various variables affecting the adsorption behavior of PAL-TEPA were optimized sequentially. The adsorption process followed the pseudo-second-order model and fitted to the Langmuir isotherm equation. The maximum adsorption amount reached 600 mg g −1 ( R = 75 %) under optimized conditions (pH = 2.0, C 0 = 200 mg L −1 , V = 100 mL, T = 30 °C, dos. = 25 mg, t = 24 h). Toxic Cr (VI) ions were successfully converted to harmless Cr (III) ions and removed by PAL-TEPA adsorbent. This approach opens new avenues for the utilization of lignin and new kinds of adsorbent for Cr (VI) removal.
研究领域:
环境科学
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化学工程
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材料科学
✓ 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）