SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Cheng Liu,Chuan Tan,Yangzhou Fan,Yipeng Yan,Chuan Shan,Jingsong Xu,Guangyuan Chen,Renren Wang,Kai Du,Xin Chen,Tao Duan
The efficient purification of radioactive iodine aerosols is essential in developing nuclear energy. Using existing materials and processing processes, it is hard to efficiently purify iodine aerosols and iodine gas simultaneously. Membranes with excellent adsorption and filtration properties are suitable candidates for efficient purification. A simple one-step synthetic strategy developed from the electrospinning method fabricates a multifunctional composite nanofibrous membrane material (ZIF-8@PVP/PAN). The ZIF-8 crystals coated the fiber surface, and some were embedded into the PVP/PAN fiber without significantly changing the fiber diameter distribution. The ZIF-8@PVP/PAN membrane shows outstanding adsorption properties with a maximum adsorption capacity of 2898 mg/g for iodine gas and 456 mg/g for methyl iodide. In addition, at a face velocity of 5 cm/s, it exhibits excellent filtration efficiency of 99.91 % for PM 0.3 with a much lower pressure drop of 79 Pa. Combine the DFT theoretical calculations and characterization results, it can be considered that active adsorption sites provided by the PVP/PAN fiber framework and the loaded ZIF-8 enhanced the iodine adsorption together. The efficient filtration results from the synergistic effect of interception, adsorption, and electrostatic attraction. The ZIF-8@PVP/PAN composite membrane with excellent multifunctional performance and outstanding thermal and radiation stability provides a potential material for efficiently purifying iodine aerosols and iodine gas in reprocessing plants under practical working conditions.
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Journal of Energy Storage
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2024
·
IF 8.9
Jiaqi Sun,Zuoshu Wang,Jie Zhang,Dewei Wang
Aqueous zinc‑iodine batteries are favorable solutions for grid-level energy storage owing to their cost-effective components and intrinsic safety. Nevertheless, the sluggish conversion kinetics and polyiodide shuttle effect have significantly hindered their practical applications. Herein, a Co single atom anchored on N-doped porous carbon nanosheets (Co-SAs@NPC) was produced through an efficient molten-salt engaged pyrolysis process and further utilized as the iodine host for aqueous zinc-iodine batteries. The large specific surface area (1741 m 2 g −1 ) combined with abundant heteroatom-containing functional groups can afford a tight physical and chemical confinement towards iodine species. Meanwhile, the presence of Co single atoms exhibits high electrocatalytic activity towards I 2 reduction reactions. According to the experimental results and DFT theoretical calculations, the resulting Co-SAs@NPC can simultaneously offer generous electrochemical active sites and electrocatalytic activity, which displays a high adsorption ability towards iodide species and boost the reversible redox reactions between iodine and iodides. Consequently, the as-assembled zinc-iodine batteries with Co-SAs@NPC/I 2 cathodes can deliver a high specific capacity (295 mA h g −1 at 0.3 A g −1 ), good rate performance (199 mAh g −1 at 20 A g −1 ), and long cyclic stability over 10,000 cycles. Additionally, the absence of polyiodide shuttle was analyzed by a series of ex-situ spectrum analyses.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Hao Huang,Yueyue Yu,Qian Geng,Tianhao Zhang,Mingqiang Yan,Dong Feng,Delong Xie
This study presents the design and synthesis of a novel phosphorus-containing ionic liquid flame retardant, DV, which serves as both a surfactant and a synergistic flame retardant. DV self-assembled onto the surface of BP nanosheets through electrostatic interactions, forming a polymerized ionic liquid coating via radical initiation. Simultaneously, DOPO-derived groups were incorporated into the polymer matrix by ionic bonding with imidazole groups, further enhancing the structural integrity of the composites. The resulting composite was used to develop EVA-based materials with outstanding mechanical properties and flame retardancy. At a low loading of 3 wt% DVBP, the synergistic effect of phosphorus and nitrogen, combined with the two-dimensional structure of BP, facilitated char formation at elevated temperatures, effectively inhibiting the transfer of oxygen and flammable substances. Additionally, the gas-phase flame-retardant mechanism reduced the release of pyrolysis products. The composite achieved a V-0 rating in the UL-94 test, a 22.3 % reduction in peak heat release rate (PHRR), and an 8.1 % increase in tensile strength, highlighting its potential for application in cables used in critical transport equipment.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Yuee Tian,Wanying Yin,Ruiguang Wang,Huilu Sun,Shaobin Xu,Xiaobo Huang,Genqiang Chen,Zhiping Che
Quinine is the main alkaloids in the bark of Cinchona and its homologous plants of Rubiaceae. To discover biorational natural product-based pesticides, a series of 9 R -acyloxyquinine derivatives containing 1,3,4-oxadiazole moieties were prepared by ingeniously introducing an active ester group and a 1,3,4-oxadiazole five membered heterocyclic ring at its C-9 position, and their structures were well characterized by 1 H NMR, 13 C NMR, HRMS, and m.p. The stereochemical configuration of target compound 6 t was unambiguously subjected to single-crystal X-ray diffraction. Furthermore, bioactivities of these compounds as anti-oomycete and anti-fungal agents against two serious agricultural diseases, Phytophthora capsici and Fusarium graminearum we assessed. Among all tested compounds, 1) Compounds 6c and 6d displayed promising anti-oomycete against P. capsici , with EC 50 values of 38.42 and 35.49 mg/L, respectively. 2) Compound 6i exhibited promising anti-fungal against F. graminearum , with an EC 50 value of 29.92 mg/L. Moreover, some interesting results of structure-activity relationships were also observed. The results of this study pave the way for further design, structural modification, and development of quinine derivatives as plant anti-oomycetes and anti-fungal agents in crop protection.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Shen Jiafu,Huang Xi,Dai Yu,Zhang Xiaojin,Xia Fan
Low-grade heat is abundant and ubiquitous, but it is generally discarded due to the lack of cost-effective recovery technologies. Ion thermoelectric cells are an affordable and straightforward approach of converting low-grade heat into usable electricity for sustainable power. Despite their potential, ion thermoelectric cells face challenges such as limited Seebeck coefficient and required series integration. Here, we demonstrate that the N-type and P-type conversion of ion thermoelectric cells can be achieved through the phase transition of temperature-sensitive hydrogel containing the triiodide/iodide redox couple. Through the strong interaction between the hydrophobic region of the hydrogel and triiodide, the hydrophobic side selectively captures triiodide and the hydrophilic side repels triiodide, raising the concentration difference of triiodide and thereby increasing the Seebeck coefficient. Specifically, the Seebeck coefficient of the N-type ion thermoelectric cells is 7.7 mV K −1 , and the Seebeck coefficient of P-type ion thermoelectric cells is −6.3 mV K −1 (Δ T = 15 K). By connecting 10 pairs of the N-type and P-type ion thermoelectric cells, we achieve a voltage of 1.8 V and an output power of 85 μW, surpassing the reported triiodide/iodide-based ion thermoelectric cells. Our work proposes a phase transition strategy for the N-P conversion of ion thermoelectric cells, and highlights the prospect of series integrated hydrogel ion thermoelectric cells for low-grade heat harvesting.
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Fan Li,Shang Sun,Lina Ma,Wenjing Zhang,Min Zhou,Yu Fu,Hengrui Guo,Xueying Su,Jinliang Shi,Hao Luo,Yang Yang
The intrinsically low electrical conductivity of elemental iodine and its slow redox kinetics represent two significant obstacles that hinder the commercialization of aqueous zinc-iodine batteries. These challenges can be addressed by modulating the adsorption-desorption equilibrium of iodide ions in the active material. This study presented a synergistic strategy of “Electronic Modulation” and “Phase Transition Engineering” to optimize the catalytic adsorption-desorption dynamics. A dual-designed Fe ions doped VO 2- x heterostructure anchored on reduced graphene oxide (Fe-VO 2- x /rGO) is demonstrated to synchronously adjust iodine adsorption and boost redox kinetics. The Fe-induced electronic structure modulation elevated the d-band center of vanadium, creating catalytic sites to promote the desorption of iodide ions and facilitate their diffusion. Concurrently, the phase transition from VO 2- x to V 2 O 5- n within the heterostructure establishes a 3D conductive network, synergizing with rGO to ensure rapid ion/electron transport. This “adsorption-catalysis-transport” collaborative mechanism enabled the Fe-VO 2- x /rGO cathode to achieve an ultrahigh capacity retention of 81.48% after 60,000 cycles at 20 A g −1 , surpassing state-of-the-art zinc-iodine systems. The work provides a paradigm for manipulating interfacial dynamics through electronic and crystallographic dual regulation in conversion-type batteries.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Xu Jia,Jiyang Tian,Qian Zhang,Jiajun Wan,Hongjiang Song,Ying Xie,Jie Liu
For I 2 cathodes, the severe polyiodide shuttling and sluggish reaction kinetics result in unsatisfactory cycling lifespan and rate performance. Herein, a bifunctional electrophilic host is designed by engineering the electron cloud density to effectively anchor electron-rich polyiodides. Three configurations are initially screened through density functional theory simulations, which reveal that Si─O bonds can firmly anchor I 3 − via Si electrophilic centers. Owing to the considerably lower electronegativity of Si (1.90) than that of O (3.44), electrons surrounding Si atoms are strongly drawn toward O atoms, creating Si electrophilic centers. Specifically, I 3 − adsorbed onto Si─O bonds exhibits a favorable orbital configuration with a low energy gap, thereby kinetically enhancing polyiodide conversion. As a proof of concept, SiO 2 nanocrystals embedded in conductive microporous bio-carbon are derived from poplar flowers. The resulting I 2 cathodes demonstrate excellent cycling stability over 110 000 cycles at 4 A g −1 and a high rate performance with a capacity of 123.8 mAh g −1 at 100 C. Furthermore, the I 2 cathode with a loading as high as 36.5 mg cm −2 can also perform well in terms of 127.6 mAh g −1 after 100 cycles. This study presents a new route for the rational design of high-efficiency and sustainable hosts for I 2 cathodes.
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CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Renwu Feng,Qingying Li,Haozhen Dou,Yihan Xie,Jinliang Yan,Mi Xu,Dan Luo,Zhile Yang,Yuanjun Guo,Xinru Wu,Xin Wang,Zhongwei Chen
Aqueous zinc ion batteries (ZIBs) are promising energy storage technologies, but face formidable challenges from hydrogen evolution reaction, dendrite growth, and active material shuttle. However, how to manipulate the electrolyte structure at the nanoscale to boost battery performance remains largely unexplored. Herein, nanodomain electrolytes with structural nano-heterogeneity are developed by introducing α-Dipole Unit as co-solute and through their self-assembly, which enables precise control over ion-transport kinetics and interfacial reversibility of both anode and cathode. The ionized α-dipole units self-aggregate to form clusters induced by the dipole effect, which not only reconstructs hydrogen bond network of electrolyte and realizes the rapid diffusion of Zn 2+ to obtain HER/dendrite-free Zn anode, but also serves as barrier to inhibit the shuttle effect of I 3 − via repulsion-capture synergy mechanism. Remarkably, the Zn symmetric cells can still maintain a satisfactory cycle life at a low temperature of −20 °C, and the capacity retention rate of the assembled Zn I 2 battery is as high as 94.31 % after 13,000 cycles. This pioneering attempt to manipulate electrolyte nanostructure reveals a new dimension in electrolyte design for high-performance batteries.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Chang Liu,Xiaowei An,Peifen Wang,Xuli Ma,Xingfa Li,Xin Chen,Yongguo Li,Xiaogang Hao,Xiaoxu Zhang,Abuliti Abudula,Guoqing Guan
In this study, a highly efficient and cost-effective adsorbent for gaseous iodine, nitrogen-doped KOH-activated coconut shell biochar (NKBC), is presented. A two-step pore expansion assisted by KOH activation process, enhanced by nitrogen doping, created a hierarchical porous structure with ultra-high specific surface area of 2977.90 m 2 /g, large total pore volume of 2.19 cm 3 /g and available micropore volume of 1.17 cm 3 /g, resulting in an iodine adsorption capacity of 6635 mg/g at 75℃ within 3 hours. The low desorption rate (12.93 % at room temperature) highlights the material's stability. Grey relational analysis identified specific surface area and pore structure as key determinants of adsorption capacity, while pore size distribution and nitrogen content significantly influenced desorption. DFT calculations confirmed the enhanced iodine adsorption by nitrogen functionalities and the effectiveness of micro- and narrow mesopores in iodine capture. This sustainable approach offers a significant advancement in developing high-capacity adsorbents for the effective remediation of radioactive iodine.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Guowei Chen,Minghui Qiu,Wei Ke,Xianfu Chen,Yiqun Fan
Membrane technology is an efficient approach for separation of polyvinyl alcohol (PVA)-starch desizing wastewater. However, fouling caused by complex components remains a challenge in industrial-scale applications, leading to reduced flux and frequent chemical cleaning. Here, we utilize PVA components in wastewater to form a self-forming dynamic membrane (SFDM) on substrate surface during filtration, thereby improving the anti-fouling properties of the ceramic membrane as well as its retention performance for small molecule starches generated through decomposition in a high temperature and strong alkali system. We investigated the effects of pore sizes in porous ceramic on starch separation performance and dynamic membrane formation in the simulation system of PVA-starch. In an industrial desizing wastewater treatment system, we verify the stability and reproducibility of SFDM technology. The results demonstrate that ceramic membranes with a pore size of 20 nm are conducive to forming complete SFDMs, resulting in an increase in starch retention from 75.6 % to 99.9 %, while maintaining flux at 59 L·m −2 ·h −1 . The removal rates of COD, TOC and turbidity are 76.2 %, 68.3 % and 99.9 %. SFDMs can form quickly and reduce irreversible fouling on ceramic membranes. The use of ceramic-supported PVA SFDM provides valuable insights for applying ultrafiltration technology to complex wastewater.
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Energy & Environmental Science
·
2024
·Vol. 17
·期 12
·4104-4114
·
IF 32.4
Yongbin Zhu,Cheng-Gong Han,Jiawei Chen,Lijuan Yang,Yingming Ma,Hongyu Guan,Dongxue Han,Li Niu
Gel-based ionic thermoelectric (i-TE) conversion systems have attracted more attention to harvest energy from ambient waste heat to power sensors in IoT systems, due to their high ionic thermopower, cost-effectiveness, and environmental friendliness. However, their thermoelectric performance, particularly output power density, remains low, hindering their further application. To date, there is still a lack of an effective strategy to reverse this serious situation. Herein, we originally designed an ionic thermoelectric-electrochemical (i-TE-EC) cell by combining two asymmetric gels into a double sandwich structure, resulting in high thermoelectric performance. By tailoring gel compositions, including the concentration and ratio of redox couples as well as additive contents, a maximum output power density Pmax/(ΔT)2 of 10.0 mW m−2 K−2, a cell ionic thermopower of 5.2 mV K−1, and an energy density of 3.4 J m−2 K−2 in two hours were obtained at 313 K for the i-TE-EC cell Gp | G-m/n FeCN4−/3− | Gp | G-x/y I−/I3−-z CF3SO3K | Gp (m/n = 0.175/0.025 M, x/y = 0.10/0.05 M, z = 0.4 M). Moreover, Pmax/(ΔT)2 increased to a higher value of 20.5 mW m−2 K−2 for the i-TE-EC cell using a CEM as a built-in electrode. A gel-device assembled by nine single i-TE-EC cells connected in series generated a voltage of 1.55 V and a high Pmax/(ΔT)2 of 5.2 mW m−2 K−2 at 313 K and ΔT = 5 K. This work provides a promising route for improving the gel-based thermoelectric performance, available for other energy conversion systems.
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RSC Advances
·
2024
·Vol. 14
·期 13
·9072-9079
·
IF 3.9
Ruibin Xue,Gang Gao,Lei Yang,Liangge Xu,Yumin Zhang,Jiaqi Zhu
CuI films present promising optoelectronic properties for transparent conductors. However, the high hole concentration in CuI films hinders the controllable modulation of hole mobility, limiting their application in low-dimensional thin-film transistors. In this study, CuI films were prepared through a Cu film iodination method at room temperature, and a systematic investigation was conducted on the modulation of hole concentration and mobility with varying film thickness. The films exhibited a zinc blende structure (γ-phase) with increasing grain size as the thickness increased. The transmittance and optical bandgap of the films decreased with increasing thickness. The correlation of vacancy concentration with changing film thickness was analyzed through photoluminescence spectroscopy, revealing the influence of grain boundary migration on vacancy formation. The reduction in film thickness diminishes the migration of CuI grain boundaries, consequently reducing the probability of Cu vacancy and I vacancy formation, resulting in diminished hole concentration and enhanced hole mobility and film conductivity. The film with a thickness of 20 nm demonstrated optimal performance, with a transmittance of 90%, hole concentration of 4.09 × 1017 cm−3, hole mobility of 506.50 cm2 V−1 s−1, and conductivity of 33.19 S cm−1. This work deepens the understanding of hole transport such as hole concentration and mobility modulation in CuI films, highlighting the importance of controlling grain boundary migration during the film growth process.
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