JOURNAL OF MEMBRANE SCIENCE
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2026
·
IF 8.8
Te Tu,Jiaqi Zhang,Mengni Xiao,Feihong Liang,Enyu Wang,Lanlan Wu,Long Ji,Shuiping Yan
A novel strategy is proposed to lower CO 2 regeneration energy in DAC. • Monovalent-selective AEMs capable of selectively separating HCO 3 − and CO 3 2− were prepared. • The optimized membrane exhibited a superior HCO 3 − /CO 3 2− perm-selectivity of 24.2. • Specific energy consumption for CO 2 regeneration was reduced by 59.3% compared to commercial AEMs. • The fabricated AEMs exhibited both high HCO 3 − /CO 3 2− perm-selectivity and total carbon permeability. Direct air capture (DAC) is an emerging technology for reducing atmospheric CO 2 content directly, but its current deployment is limited by the high energy demand in CO 2 regeneration. As an energy-conserving alternative, bipolar membrane electrodialysis (BPMED) exploits pH differentials to drive CO 2 regeneration without external thermal inputs or pressurized environments. In this work, we propose a new strategy to construct anion exchange membranes (AEMs) with high carbon loading capacity, enabling preferential permeation of bicarbonate (HCO 3 − ) over carbonate (CO 3 2− ) to significantly reduce specific electrical energy consumption for CO 2 regeneration in BPMED. AEMs were synthesized in a single-casting-process fabrication that integrates the dual advantages of electrostatic regulation and self-crosslinking, achieved through the incorporation of trimethylamine and sulfamerazine (SF) into 2,6-dimethyl-1,4-phenylene oxide (BPPO). The resulting membranes exhibited low water uptake (<12.6%), minimal linear expansion rate (<3.5%), and an area resistance as low as 2.7 Ω cm 2 . The perm-selectivity ( P CO 3 2 ‐ HCO 3 ‐ ) declined with increasing applied current density. At 5 mA/cm 2 current density, the optimized AEM (BPPO-SF-0.12) exhibited a HCO 3 − permeability of 0.21 mmol/(cm 2 ·h) and a CO 3 2− permeability of 0.04 mmol/(cm 2 ·h), yielding a perm-selectivity value of 24.2, substantially higher than that of the commercial membrane (1.0). In BPMED-based CO 2 regeneration, BPPO-SF-0.12 achieved the highest CO 2 regeneration ratio of 45.3%, and its energy consumption was only 240 kJ/mol, corresponding to a 59.3% reduction relative to the commercial membrane (590 kJ/mol). These findings substantiate the efficacy of the proposed strategy, revealing that AEMs with elevated carbon loading concurrently augment CO 2 regeneration ratio and energy performance. Such results establish a practical framework for energy-minimal CO 2 liberation via BPMED technology. Download: Download high-res image (318KB) Download: Download full-size image
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DOI
高影响因子
ACS Applied Nano Materials
·
2020
·
IF 0
Qingnan Wu,Ming Wen,Weixi Yan,Qingsheng Wu,Hezhong Wang,Yongqing Fu
A functionalized carbon nanotube (FCNT)/Ni(HCO3)2-Ni nanostructures were synthesized by decorating nanoflaky and mesoporous Ni(HCO3)2 onto FCNT along with in situ formed reduced metallic Ni for the purpose of constructing an energy-storage system with both high specific capacity and cycling stability. Such flaky nanostructures can significantly increase the contact surface areas between the mesoporous and nanoflaky Ni(HCO3)2-Ni and electrolyte, thus immensely reducing the electrolyte-ion diffusion paths and accelerating the electron-transport rates through the use of a FCNT. The in situ reduced metallic Ni atoms are directly contacted with the electrolytes and quickly converted into NiOOH in the alkaline environment. For this reason, the capacity retention of battery-type electrochemical materials can be significantly enhanced, especially at the beginning of cycles. The obtained flaky FCNT/Ni(HCO3)2-Ni nanomaterials exhibit excellent electrochemical performances with a high specific capacity of 203 mAh·g–1 at 3 A·g–1 current density for supercapacitor energy-storage systems. An aqueous asymmetric supercapacitor made of FCNT/Ni(HCO3)2-Ni//graphene oxide achieves a 132 Wh·kg–1 energy density at 2880 W·kg–1 power density and an excellent cycling stability with 84% after 6000 cycles.
研究领域:
材料科学
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电化学
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DOI
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Zhiyan Hou,He Meng,Xueqing Shao,Xianglong Wang,M. Usman Tahir,Shakiaz Ahmad,Chao Yang,Xintai Su,Lijuan Zhang
The complex composition and recycling process of electroplating sludge are the two major obstacles restricting the recycling of metal resources. In this work, Ni(HCO 3 ) 2 hollow spheres with unique amorphous structure were prepared via a simple and controllable hydrothermal method using nickel-containing electroplating sludge as raw material and ascorbic acid (AA) as complexing agent . The introduction of AA not only changed the morphology of the sample, but also formed pure phase Ni(HCO 3 ) 2 . The controllable amorphous structure is beneficial to the diffusion of OH - in the electrolyte. More importantly, its disordered atomic arrangement and metastable structure provide a large number of active sites and ion transmission channels, which improve the specific capacity. Consequently, amorphous Ni(HCO 3 ) 2 delivers a large capacitance of 599.8 C g −1 at 1 A g −1 , besides large capacitance, it also exhibits large rate capability (61.02% at a current density of 10 A g −1 ) and cycle performance (capacitance retention 52.09% after 1000 cycles). Importantly, the recoveries of nickel, iron and aluminum are 95.57%, 99.92% and 92.30%, respectively, indicating that electroplating sludge has a good application prospect as electrode materials for supercapacitors .
研究领域:
材料科学
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环境科学
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电化学
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DOI
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 16
·5315-5326
·
IF 4.052
Shaolei Zhao,Keyu Tao,Yun Gong
Co-Incorporated NiV2O6/Ni(HCO3)2 arrays with different morphologies can grow on nickel foam (NF) via a mild one-step hydrothermal method. Among them, S-0.5-20 and S-0.25-20 were obtained at a 1 : 1 : 20 molar ratio of Co/V/urea with 0.5 and 0.25 mmol Co(NO3)2, respectively. They demonstrate high areal capacities of 0.99 mA h cm−2 (7.94 F cm−2) and 0.56 mA h cm−2 (4.48 F cm−2) at 1 mA cm−2, respectively, which are superior to that of Co-incorporated Ni(HCO3)2/NF synthesized in the absence of Na3VO4. S-0.25-20 possesses good rate capability with 82.1% retention when the current density is increased 20-fold, and it shows superior long-term durability with 106.2% retention of the initial capacity after 10 000 charging/discharging cycles at 100 mA cm−2. These results are associated with the porous and orderly hierarchical Co-incorporated NiV2O6/Ni(HCO3)2 nanoflake arrays directly grown on the Ni foam. Moreover, due to the synergetic effect of the individual components, electrons can be transferred from V centers to Ni active sites, thus improving the stability of the vanadate. The generation of more active species, such as Co3+, during cycling could account for the increased capacity. A S-0.25-10//activated carbon (AC) asymmetrical supercapacitor shows a high energy density of 0.533 mW h cm−2 at a power density of 0.232 mW cm−2 (0.415 mW h cm−2 at 4.983 mW cm−2). Furthermore, the formation mechanism of the Co-incorporated NiV2O6/Ni(HCO3)2 nanoflake arrays is proposed.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Zimi Ye,Zhongyu Guo,Jieqiong Wang,Lilan Zhang,Yuchen Guo,Chihiro Yoshimura,Junfeng Niu
Acebutolol (ACE) has been widely used for the treatment of cardiovascular disorders, and its photochemical fate in natural waters is a matter of concern due to its ubiquitous occurrence and its toxicity to aquatic organisms. In this study, the photodegradation of ACE in river water and synthetic waters were investigated under simulated sunlight irradiation. The results demonstrated that ACE photodegradation rate in river water was 3.2 times higher than that in pure water. Then the influences of HCO 3 − , NO 3 − and DOM on ACE photolysis were investigated under their concentrations similar with the ones in river water. ACE photodegradation was significantly enhanced in the presence of HCO 3 − alone, and the scavenging experiments and the electron paramagnetic resonance experiments together proved that HCO 3 − could be oxidized by triplet-excited state of ACE to generate CO 3 •- , which subsequently played a key role in ACE degradation. The presence of both NO 3 − and DOM also increased the ACE photodegradation rates, and •OH and 3 DOM* were found to be involved in the degradation. In addition, when DOM was added to a solution with HCO 3 − , the enhancement effect of HCO 3 − on ACE photodegradation was weakened due to the scavenging of CO 3 •- by DOM combined with the light screening effect of DOM.
研究领域:
环境科学
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化学
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水处理
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DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
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2024
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IF 7.6
Cheng Wang,Shuijing Zhou,Xiaoming Wang,Wenfeng Tan,Xionghan Feng
Photo-catalyzing sulfite (S(IV)) for the generation of sulfate radical (SO 4 •- ) has emerged as a novel advanced oxidation process (AOP) recently. However, both the potential of soil minerals as effective photocatalysts and the process of water acidification due to S(IV) oxidation have been overlooked. Herein, maghemite (γ-Fe 2 O 3 ), a typical soil iron oxide with excellent photocatalytic reactivity like hematite and magnetic-collectible property like magnetite, was successfully used to activate S(IV) for iohexol degradation under visible light irradiation. As a result, 91.3% of iohexol was eliminated within 15 min at 0.1 g/L maghemite and 0.5 mM S(IV) under neutral conditions. The influencing factors, including initial pH, catalyst dosage, S(IV) amount, co-existing substances and water matrix, were systematically investigated. The maghemite/S(IV)/vis system exhibited superior performance in iohexol degradation at a wide pH range (3–10). It was found that the released proton via S(IV) oxidation led to severe water acidification. Interestingly, a low dose of HCO 3 − could evidently resist water acidification with little influence on iohexol elimination. Radical quenching experiments and electron spin resonance (ESR) analysis confirmed that SO 4 •- , •OH and •O 2 − were involved in iohexol abatement with SO 4 •- being the dominant reactive species. Compared with hydrogen peroxide, persulfate and peroxymonosulfate, the established maghemite/S(IV)/vis system achieved much more remarkable degradation performance. Furthermore, the reactivity of the catalyst was not obviously reduced even after 10 runs of reaction. This study expands the application of soil iron oxide mineral in S(IV) activation in water treatment and proposes an approach to regulate water acidification in S(IV)-based AOP.
研究领域:
环境科学
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化学工程
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DOI
PubMed
高影响因子
Heliyon
·
2023
·Vol. 10
·期 1
·e23371
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IF 4
Mingming Zheng,Yinghao Li,Menghua Cao,Yuxin Guo,Guohong Qiu,Shuxin Tu,Shuanglian Xiong,Dun Fang
In the present study, we demonstrated that the presence of cysteine could remarkably enhance the degradation of atrazine by Fe 3 O 4 /persulfate system. The results of electron paramagnetic resonance (EPR) spectra confirmed the combination of cysteine and Fe 3 O 4 exhibited much higher activity on activation of persulfate to generate more SO 4 •- and •OH than Fe 3 O 4 alone. At pH of 3.0, SO 4 •- and •OH contributed to about 58.2 % and 41.8 % of atrazine removal respectively, while •OH gradually dominated the oxidation of atrazine from neutral condition to alkaline condition. The co-existing Cl - and HCO 3 - could quench SO 4 •- , resulting in the inhibition of atrazine degradation. The presence of low natural organic matters (NOM) concentration (0-2 mg L -1 ) could enhance the atrazine removal, and high concentration (>5 mg L -1 ) of NOM restrained the atrazine degradation. During the Cysteine/Fe 3 O 4 /Persulfate process, cysteine served as a complexing reagent and reductant. Through acidolysis and complexation, Fe 3 O 4 could release dissolved and surface bound Fe 2+ , both of which contributed to the activation of persulfate together. Meanwhile, cysteine was not rapidly consumed due to a regeneration process, which was beneficial for maintaining Fe 2+ /Fe 3+ cycle and constantly accelerating the activation of persulfate for atrazine degradation. The reused Fe 3 O 4 and cysteine in the Cysteine/Fe 3 O 4 /Persulfate process exhibited high stability for the atrazine degradation after three cycles. The degradation pathway of atrazine included alkylic-oxidation, dealkylation, dechlorination-hydroxylation processes. The present study indicates the novel Cysteine/Fe 3 O 4 /Persulfate process might be a high potential for treatment of organic polluted water.
研究领域:
环境科学
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化学工程
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水处理
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污染物降解
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DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-8
·
IF 14.7
Wu Qianbao,Yang Na,Xiao Mengjun,Wang Wei,Cui Chunhua
Near-neutral HCO 3 – aqueous solution plays an essential role in respiratory, mineralization and catalysis, yet the interconversion between hydrated CO 2 , HCO 3 – and CO 3 2– and the associated proton transfer under such proton-deficient conditions remain uncovered. Here we reveal that cation enables HCO 3 – to self-dissociate into OH – and CO 2 through a pH-independent process, where CO 2 hydration and subsequent proton transfer in acid-base reactions lead to the overall exchange of oxygen isotopes between HCO 3 – and H 2 O tracked by oxygen isotope-labeled Raman spectroscopy. Isolating HCO 3 – from cations with crown ether impedes HCO 3 – dissociation and the following reactions. Further molecular dynamics simulations demonstrate that the interplay between HCO 3 – and hydrated cations drives HCO 3 – dissociation. This study suggests a natural proton channel upon coupling HCO 3 – with cations.
研究领域:
化学
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生物化学
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催化
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光谱学
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分子动力学
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DOI
PubMed
高影响因子
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
·
2020
·Vol. 235
·期 4
·451-466
·
IF 2.03
Yuli Xue,Yan Zhang,Xiaoling Tan,Wenqing Li,Zhongshu Li,Shaonan Xu,Peng Zhang,Jian Wang,Peiping Zhang,Shiding Miao
It is of importance to reclaim single-salt of potash from Li + -type brines of low concentration. In this work the potassium salts KHCO 3 was efficiently separated from the lithium carbonate-type brines with the aid of CO 2 carbonation. The phase field was provided in which the precipitation of KHCO 3 occurs and single-salt of potassium can be obtained. The low concentration of [Li + ] was also successfully concentrated to a high level (8.1 g/L), and this concentration can be used as sources for Li + -salts production using pre-developed strategies, which looks forward wider applications of the lithium resources of natural brine. This state-of-art was traced via isotherm evaporation on the quaternary system of Li + –K + –CO 3 2− –H 2 O at 298.15 K in which the carbonation steps were performed by CO 2 . Metastable phase diagram was found to consist of three invariant points, seven univariant curves, and four crystallization fields corresponding to Li 2 CO 3 , KHCO 3 , potassium carbonate sesquihydrate (K 2 CO 3 ⋅ 3/2H 2 O), and a potassium carbonate and potassium bicarbonate double salt (K 2 CO 3 ⋅ 2 KHCO 3 ⋅ 1.5H 2 O). There was no crystallization field corresponding to LiHCO 3 . The pH-composition diagram and density-composition diagram were also plotted. This work was carried out in aim of extracting/separating single salts of alkali metals from carbonate-type brines of west China.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2022
·Vol. 45
·期 10
·1842-1849
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IF 2.215
Junteng Ma,Weihua Shen,Wenxuan Wei,Yunjin Fang
The catalytic activity of an ionic liquid catalyst decreased during the transesterification of propylene carbonate (PC) with methanol to dimethyl carbonate (DMC). The interaction between the strong basic sites of ionic liquid catalyst and carbonyl compounds of PC and/or DMC was considered to attribute to this deactivation. The presence of H 2 O accelerated this process by the formation of OH – . The strong basic ionic liquid reacted with the trace amount of H 2 O in the reaction system to generate OH – , which then reacted with the carbonyl structure in PC and/or DMC to form the inactive compound HCO 3 – , resulting in the deactivation of the ionic liquid catalyst. A plausible mechanism was proposed for the deactivation of the ionic liquid catalyst in this reaction.
研究领域:
化学工程
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催化
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绿色化学
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DOI
高影响因子
Catalysis Science & Technology
·
2024
·Vol. 14
·期 4
·990-998
·
IF 4.4
Huichao He,Jinyu Wen,Qiwen Chen,Hai Yu,Kun Liu,Tao Han,Xiaoyan Liu,Gaili Ke,Yutong Li,Huaming Yang
The catalytic activation of HCO3−/H2O2 to generate reactive oxygen species could treat neutral or weak alkaline organic wastewater effectively. Based on the activation principle of HCO3−/H2O2 and the advantages of natural tourmaline, four types of common tourmaline powders were investigated as catalysts to activate HCO3−/H2O2 for the degradation of typical anionic (methyl orange: MO) and cationic (methylene blue: MB; rhodamine B: RhB) dyes in aqueous solution. Compared to magnesium-rich tourmaline, lithium-rich tourmaline and low Fe content tourmaline, higher activity was observed for high Fe content tourmaline (high-Fe TM) in the catalytic activation of HCO3−/H2O2 to achieve dye degradation. Furthermore, high-Fe TM exhibited acceptable stability for activating HCO3−/H2O2 for the degradation of dyes, and the co-existing ions in municipal tap water, temperature and pH had a weak influence on the catalytic activity of high-Fe TM. The degradation of dyes in the high-Fe TM/HCO3−/H2O2 system was found to be initiated by typical reactive oxygen species, which are mainly originated from the catalytic activation of HCO3−/H2O2 with high-Fe TM. Specifically, the Fe-based sites of high-Fe TM and the Fe ions dissolved with high-Fe TM co-activated HCO3−/H2O2 through heterogeneous and homogeneous catalysis, respectively. The degradation of RhB was driven by ˙OH and ˙O2−, and the degradation of MB and MO was initiated by 1O2.
研究领域:
环境化学
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催化科学
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水处理技术
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材料科学
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污染控制
✓ 已验证
DOI
高影响因子
iScience
·
2024
·
IF 4.6
Yixi Su,Jiwei Chen,Jingyan Hu,Cheng Qian,Jiahao Ma,Sigurður Brynjolfsson,Weiqi Fu
A major obstacle to exploiting industrial flue gas for microalgae cultivation is the unfavorable acidic environment. We previously identified three upregulated genes in the low-pH-adapted model diatom Phaeodactylum tricornutum : ferredoxin (PtFDX), cation/proton antiporter (PtCPA), and HCO 3 − transporter (PtSCL4-2). Here, we individually overexpressed these genes in P. tricornutum to investigate their respective roles in resisting acidic stress (pH 5.0). The genetic modifications enabled positive growths of transgenic strains under acidic stress that completely inhibited the growth of the wild-type strain. Physiological studies indicated improved photosynthesis and reduced oxidative stress in the transgenic strains. Transcriptomes of the PtCPA- and PtSCL4-2-overexpressing transgenics showed widespread upregulation of various transmembrane transporters, which could help counteract excessive external protons. This work highlights ion/electron carrier genes’ role in enhancing diatom resistance to acidic stress, providing insights into phytoplankton adaptation to ocean acidification and a strategy for biological carbon capture and industrial flue gas CO 2 utilization.
研究领域:
植物学
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遗传学
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环境科学
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生物技术
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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）