APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Menglu Wang,Bolong Liang,Shumin Lin,Zhe Zhao,Hongbin He,Xiliang Li,Shu-xuan Liang
The magnetic Fe 3 O 4 @ZIF-8 with high adsorption properties and easy separation were embedded in BiOX (X = Cl, Br, I) to synthesize Fe 3 O 4 @ZIF-8@BiOX using a simple one-pot solvothermal strategy. The crystal structure, surface morphology, photoelectric properties, thermal stability and magnetic response of the three materials were compared and analyzed, and the effect on the removal of OTC and Cr(VI) from single and coexisting systems by adsorption-photocatalysis is discussed. The results show Fe 3 O 4 @ZIF-8@BiOI has the highest separation efficiency of photogenerated carriers upon photoexcitation and stronger light absorption capacity, and exhibits better adsorption-photocatalytic activity than the other two materials in the photocatalytic reduction of Cr(VI) (68 % and 65 % removal for single and coexisting systems) and degradation of OTC (86 % and 59 % removal for single and coexisting systems). It is noteworthy that in the coexistence of Cr(VI) and OTC, a slight decrease of removal occurred, which could be due to a competitive effect between two pollutants being greater than the synergistic effect. ∙O 2 - is the main active substances in the adsorption-photocatalysis process. Finally, this work demonstrates the excellent adsorption and photocatalytic ability of Fe 3 O 4 @ZIF-8@BiOI for the simultaneous removal of Cr(VI) and OTC, which has great potential for practical wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Huijie Lv,Haohan Yu,Huayin Zhang,Feng Zhu,Ziyi Wang,Qian Xu,Wenliang Ji
ZIF-8 and polydopamine (PDA) double -modified melamine foam (MF), namely ZIF-8@PDA MF was fabricated using a new in-situ growth method for the co-removal of multiple organophosphorus flame retardants (OPFRs) from environmental water. The resulting ZIF-8@PDA MF exhibited a porous, three-dimensional (3D) cross-linked network in which ZIF-8 evenly distributed on MF via the PDA’s adhesive properties, leading to a 17-fold increase in surface area (from 1.357 to 22.964 m 2 /g) to facilitate mass transfer and target binding. Through experimental confirmation, the mechanisms of hydrogen bonding, π-π, electrostatic and hydrophobic adsorption enable the effective removal of 11 types of OPFRs including aryl-, alkyl- and Cl-OPFRs. Compared to the adsorbents reported previously, ZIF-8@PDA MF achieved higher removal efficiencies (53.8%–99.7%), particularly a 30% improvement for highly polar TEP and TCEP. The adsorption behavior of OPFRs by ZIF-8@PDA MF followed a spontaneous, endothermic process, conforming to the pseudo-second-order model and Langmuir model. The adsorption equilibrium could be reached within one hour, 2-48 times faster than most reported studies (2-48 h). In addition, ZIF-8@PDA MF was demonstrated to efficiently remove multiple OPFRs from raw environmental water and the reusability reached up to four cycles without requiring secondary separation, highlighting its practical applicability.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jiayi Shan,Fei Ying,Linrui Li,Yubo Pan,Ziwen Shi,Jijia Liang,Yunfei Gao,Fengyun Wang,Mingzhu Xia
The development of high-efficiency adsorbents for addressing Pb(II) contamination in aquatic environments remains an urgent challenge in environmental remediation. This study presents a novel thiol-functionalized ZIF-8-based adsorbent (ZIF-8-TMT) with a stable 3D framework and abundant thiol groups, designed to overcome the limitations of conventional adsorption materials. The synthesized ZIF-8-TMT demonstrated a substantial BET surface area (456.58 m 2 /g) and numerous active adsorption sites, exhibiting exceptional Pb(II) adsorption capacity (494.9 mg/g) that surpassed most previously reported adsorbents. Systematic characterization revealed that the composite achieved rapid adsorption kinetics, with approximately 80 % removal efficiency within 30 min, and maintained excellent regenerability - showing negligible capacity reduction after three adsorption-desorption cycles and retaining over 60 % removal efficiency after five cycles. The adsorption mechanism was comprehensively investigated through Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and computational simulations including density functional theory (DFT), bond order density (BOD), and natural adaptive orbital (NAdO) analyses. Results indicated that the superior adsorption performance originated from synergistic effects between electrostatic interactions and dual coordination involving the N3 atoms in 2-methylimidazole ligands and thiol (-SH) groups from TMT. This study not only provides fundamental insights into the coordination chemistry of Pb(II) adsorption but also demonstrates the practical potential of ZIF-8-TMT for wastewater treatment applications, offering a promising solution for heavy metal pollution control with its combination of high capacity, rapid kinetics, and excellent reusability.
研究领域:
环境科学
·
材料化学
·
重金属修复
·
吸附技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Chengli Jiao,Zedong Li,Xinxin Li,Mian Wu,Heqing Jiang
Poor interfacial compatibility that often led to low gas separation performance is one of key challenges for developing composite membranes. In the present study, nanosized polyethyleneimine (PEI) functionalized ZIF-8 (PEI-ZIF-8) with good dispersion, having a particle size around 15 nm, has been synthesized via in-situ method and used as filler to fabricate Pebax/PEI-ZIF-8 composite membranes. Excluding the intrinsic porous structure and higher affinity with CO 2 of PEI-ZIF-8 beneficial for CO 2 selective transport, the large density of amine groups on PEI chains provide a good interfacial compatibility, and introduce facilitated CO 2 transport path. Furthermore, PEI-ZIF-8 reduces the crystallinity of Pebax matrix, which is favorable for CO 2 transport. The composite membrane with 5 wt% PEI-ZIF-8 shows a CO 2 permeance of 13.0 GPU with a CO 2 /N 2 selectivity of 49.0, which increases by 80.6% and 118.8% respectively in contrast with pristine Pebax membrane. The results demonstrate that nanoparticles functionalized by amine-polymer with long chains is effective for constructing composite membranes with good interfacial compatibility.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2014
·Vol. 181
·期 9
·903-910
·
IF 3.719
Wang Jia-Cheng,Wang Yong-Sheng,Rang Wei-Qing,Xue Jin-Hua,Zhou Bin,Liu Lu,Qian Qiu-Mei,Wang Yong-Song,Yin Ji-Cheng
We report on a sensitive and specific method for the visual and colorimetric detection of 8-hydroxy-2′-deoxyguanosine (8-OHdG) in human urine by using the 8-OHdG-aptamer (Apt) as the recognition element. The aptamer was adsorbed on the surface of gold nanoparticles which enhances their stability. On addition of 8-OHdG, the conformation of the aptamer changes to form a G-quadruplex structure, thereby losing the ability to protect the nanoparticles and causing a color change from red to blue. The conformational changes were also studied by circular dichroism. The response is linearly dependent on the concentration of 8-OHdG in the range from 5.6 to 282 nM, the limit of detection is 1.7 nM, the relative standard deviation ranges from 1.1 to 4.2 % (for n = 6), and the recoveries range from 95.9 to 104.9 %. The method paves the way for visual analysis of samples without the use of costly instruments.
8-OHdG-aptamer was adsorbed onto the surface of AuNPs which enhances their stability. On addition of 8-OHdG, the conformation of 8-OHdG-aptamer changes to form a G-quadruplex structure, losing the ability to protect the AuNPs and causing a color change of the system.
研究领域:
分析化学
·
生物化学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Hanchen Ye,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
The discharge of large amounts of sewage has caused enormous damage to the environment and human health. There is an urgent need for efficient and environmentally friendly materials to deal with such troubles. Materials with emulsion separation have attracted everyone’s attention. In this study, zeolitic imidazolate framework (ZIF)-8- and Co-polydimethylsiloxane (PDMS)-modified multiwalled carbon nanotube films were fabricated. First, the surface of the nanotube films was modified with ZIF-8 by in situ growth, and then a Co-PDMS layer was added by dip coating. The membrane has excellent wettability, and it is superhydrophobic and superoleophilic in air. The separation efficiency of water-in-oil emulsions reaches more than 99.9%, and it has an outstanding separation ability for corrosive emulsions. Moreover, the membrane has an excellent self-healing ability, and it can rapidly heal at normal temperature after being damaged. This makes the film more suitable for practical oily wastewater treatment. We performed related research and propose a possible self-healing mechanism.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Carbon Letters
·
2025
·
IF 5.8
Du Xue,Han Tong,Jin Biao,Meng Long-Yue,Han Lian-Hua
Contamination of food with heavy metal ions and nitrites poses a serious threat to human health. Consequently, the development of fast and sensitive platforms for detecting these contaminants is urgently required. In this paper, a novel MnMgFe-LDHs/DC sensor is constructed based on a simple strategy, in which MnMgFe layered double hydroxide (LDHs) is used as a metal precursor, and a unique "island bridge" carbon network structure is generated by its pyrolysis with ZIF-8@B, N-WMCNTs. The electrical conductivity was enhanced, and a large electroactive surface area was provided for the MnMgFe-LDHs/DC. The electrochemical properties of Pb 2+ , Cd 2+ and nitrite were investigated using this electrode as a working electrode. Under optimized conditions, the sensing platform exhibited a wide linear range with the Pb 2+ , Cd 2+ , and NO 2 − limits of detection of 46.16 nM, 59.25 nM, and 0.083 μM, respectively. Of particular note is that this sensing platform exhibits outstanding anti-interference capabilities. It can precisely and efficiently conduct the detection of nitrite and heavy metal ions in pickled foods.
研究领域:
食品科学
·
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Shanqi Zhang,Xin Luo,Xiu Yuan,Danxia Wu,Jing Liu,Kunhong Zhao,Youwei Xu,Jingjiang Zhou,Xiangyang Li,Qing X. Li
Autophagy-associated protein 8 (ATG8) is essential for autophagy and organismal growth and development. In this study, we successfully resolved the crystal structure of Drosophila melanogaster (D. melanogaster) ATG8a (DmATG8a) at 1.36 Å resolution. Being distinct from previously characterized ATG8 homologues, DmATG8a (121 residues) adopts a unique fold comprising five α-helices and four β-folding strands, in contrast to the canonical four α-helices and four β-folding strands observed in other ATG8 proteins. DmATG8a features two active cavities: hydrophobic pocket 1 (HP1) and hydrophobic pocket 2 (HP2), which are essential for the normal physiological function of ATG8. Indole and its analogs can bind specifically with HP1. Microscale thermophoresis results demonstrated a strong affinity of 6-fluoroindole with DmATG8a (3.54 μmol/L), but no affinity with the DmATG8aK48A mutant, suggesting that Lys48 is critical in binding 6-fluoroindole probably via a hydrogen bond interaction. The half-maximum lethal concentration (LC50) of 6-fluoroindole against D. melanogaster adult flies was 169 μg/mL. Our findings establish DmATG8a as a promising target for developing indole-based insecticides.
研究领域:
分子生物学
·
结构生物学
·
昆虫学
✓ 已验证
DOI
PubMed
高影响因子
Carbon Letters
·
2023
·Vol. 33
·期 7
·2029-2039
·
IF 4.5
Lou Jie,Fu Qiuping,Yu Lei,Yuan Hui,Zhao Jie,Wei Xinde,Wang Tong,Mo Changli
An environmentally friendly and low-cost chitosan-containing polysaccharide (CP) composite ZIF-8/CP was designed and prepared based on the difficulty of separating the traditional adsorbent from the water phase. ZIF-8/CP was synthesized through in-situ growth approach. The physical, chemical and structure properties of ZIF-8/CP were determined through a series of characterization methods, including SEM, FT-IR and PXRD. The effects of touch time, pH, temperature, and co-existing ions on adsorption were assessed. In addition, kinetics, isotherms of adsorption and thermodynamics were examined. The data of isotherms for adsorption indicated that the adsorption of ZIF-8/CP on MG was similar to the Langmuir model, with a maximum adsorption capacity of 1428.57 mg/g. Moreover, the kinetic parameters were consistent with the pseudo-2nd-order equation. Thermodynamic studies (Δ G < 0, Δ H > 0) demonstrated a heat-absorbing and spontaneous adsorption process. Our study reveals that ZIF-8/CP has good adsorption properties and environmental properties.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Discover Applied Sciences
·
2025
·Vol. 7
·期 7
·728
·
IF 0
Lan Tian,Ding Xiaofan,Xiao Songtao,Yuan Zhongwei,Yan Taihong,Chen Qi,Li Tianchi,Zheng Weifang
Developing effective iodine capture technologies is critical for both nuclear safety and environmental protection. This study investigates the iodine adsorption properties of ZIF-8, a metal–organic framework (MOF). ZIF-8 samples with varying particle sizes (∼50 nm, 90 nm, 150 nm, and 8 μm) were synthesized and tested for iodine vapor adsorption at 80 °C. Iodine uptake continuously increased with time, reaching ~ 3500 mg/g after 24 h without reaching equilibrium, with no significant dependence on particle size. Structural changes in ZIF-8 were observed, as iodine accumulation led to the breakdown of the framework into an amorphous gel-like substance, representing a previously unreported phase transformation. SEM and XRD characterization confirmed the collapse of the crystalline structure after iodine loading. These results indicate that iodine adsorption in ZIF-8 involves strong chemisorption in addition to physical uptake, causing irreversible framework transformations. This work highlights the influence of particle size and provides important insights for using ZIF-8 in effective radioactive iodine capture.
研究领域:
材料科学
·
环境化学
·
核安全
·
吸附科学
·
金属有机框架化学
✓ 已验证
产品关联
DOI
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Qingtao Liu,Weihao Liu,Xin Wan,Weiwei Chen,Xiaozhi Liu,Xiaofang Liu,Jiaxiang Shang,Jungang Miao,Dong Su,Xin Sun,Jianglan Shui
Zeolitic imidazolate framework-8 (ZIF-8) is widely used as precursor for carbon-supported single-metal-atom catalysts (M–N–C), but typically yields amorphous carbon with poor stability in proton-exchange-membrane fuel cells (PEMFCs). Traditional methods would lose active site density while increasing the graphitization degree. Here, this study reports that ultra-small nano ZIF-8 can produce graphene-nanostacks-based Fe–N–C that has improvements on both activity and stability. First, anti-sintering nanoporous ZIF-8 (nano-ZIF8) particles are synthesized with unit size of 8 nm (the smallest so far) using a destruction-reconstruction strategy. In situ microscopy reveals that the volatilization of Zn has a decisive effect on the graphitization degree of ZIF-8 and such process is size-dependent. Nano-ZIF8 particles have completed Zn volatilization before graphitization process beginning, leading to graphene nanostacks. These nanostacks preferentially host edge-type FeN 4 sites, which have doubled intrinsic activity and much improved stability compared with conventional Fe−N−C. In PEMFC, the catalyst achieves an activity of 48.5 mA cm − 2 @0.9V iR -free , meeting the US Department of Energy 2025 activity target. In addition, quantitative analysis of active site density is conducted in PEMFC for the first time using nitrite stripping voltammetry. The unique graphitization behavior of nano-ZIF8 paves a new avenue for advancing M–N–C catalysts.
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
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
·
2023
·Vol. 124
·期 1
·e27327
·
IF 2.2
Jiaxi Yang,Dan Gao,Yong Pan,Yuanyuan Cao,Heng Zhang,Yating Chen
The combination of zeolitic imidazolate framework-8 (ZIF-8) and ionic liquids (ILs) to create porous ionic liquids (PILs) is highly significant for efficient carbon dioxide (CO 2 ) capture and the advancement of carbon capture, utilization, and storage (CCUS) technologies. To further investigate the CO 2 capture characteristics of different PILs, two different-sized ZIF-8 structures and two functionalized ILs were prepared. Additionally, the enhancement factor of the reaction process was calculated using the dual-film theory and mass transfer coefficient. The results demonstrated that the original [PMIm]Cl had low CO 2 absorption capacity at ambient temperature and pressure, whereas the functionalized ILs had a maximum CO 2 capture capacity of approximately .31 mol/mol, with the 20 wt% concentration of tetraethylene pentamine-2-methylimidazole ([TEP][MIm]) exhibiting the highest CO 2 capture capacity of around 1.93 mol/mol. The synthesized PILs demonstrated a maximum CO 2 capture capacity of approximately 2.22 and 2.16 mol/mol at 20 and 10 wt% ionic concentrations, respectively, with a porous ionic liquid addition of 1.0/100 g. The corresponding enhancement factors were 1.53 and 1.59, respectively. These findings have significant implications for CCUS technology.
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）