Nanoscale
·
2021
·Vol. 13
·期 16
·7801-7809
·
IF 7.79
Wanguo Gao,Xiaoman Li,Xu Zhang,Senda Su,Shijian Luo,Rong Huang,Yuan Jing,Min Luo
The vacancies of semiconductors have proven to be effective active sites for photocatalytic nitrogen fixation, but what about the role of defects in MOF materials? Herein, we report the first UiO-66 with photo-excited cluster defects and linker defects for photocatalytic nitrogen fixation. It was determined through the post-synthetic ligand exchange (PSE) process that the linker defects, rather than cluster defects, can greatly improve the performance, which is due to linker defects forming unsaturated metal nodes such as the vacancy in a semiconductor. Specifically, for photo-activated UiO-66, the NH4+ production rate was 196 and 68 μmol g−1 h−1 in air atmosphere under ultraviolet-visible (UV-Vis) and visible light, respectively. This report provides a new effective strategy to design efficient nitrogen fixation photocatalysts.
研究领域:
材料科学
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化学
·
催化
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Dongfang Wang,Jie Wu,Ruohan Li,Xianghai Kong,Pan Zhao,Yanping Zhu,Zerong Song,Jinjing Xu,Ziyu You,Yuhao Wang,Qingchuan Wu,Dongqing Cai
White pollution, excessive heavy metals, and fertilizer leaching have become key issues restricting the development of agriculture. In this work, we prepared multifunctional starch mulch film (SMF/MAP/FeS) by loading ferrous sulfide (FeS) and monoammonium phosphate (MAP) onto commercial starch mulch film using poly(vinyl alcohol) for bonding. The removal efficiencies of Pb(II)/Cr(VI) for SMF/MAP/FeS could reach 97% and 93% in the aqueous solution. The adsorption isotherm, thermodynamic, and kinetics studies indicated that the adsorption process was an endothermic multimolecular-layer chemisorption. The main removal mechanisms for Pb(II)/Cr(VI) of SMF/MAP/FeS were precipitation and redox reactions. In addition, SMF/MAP/FeS not only possessed great thermal insulation and moisturizing properties but also could realize the slow release of NH4+. Furthermore, the maximum release rate of NH4+ for SMF/MAP/FeS could reach 93.4% during Pb(II)/Cr(VI) removal. At the same time, SMF/MAP/FeS has a good degradability at 50 d. A pot experiment indicated that SMF/MAP/FeS had a detoxifying effect on the Pb(II)/Cr(VI)-contaminated soil to promote the growth of pakchoi. Therefore, this study not only solves the problem of plastic and heavy metal pollution but also realizes the slow release of nutrients.
研究领域:
环境科学
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农业工程
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土壤修复
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高分子材料
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污染控制
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可持续农业
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Collagen and Leather
·
2024
·Vol. 6
·期 1
·1-12
·
IF 0
Wei Wenyu,He Manman,Ma Jianrui,He Huixia,Liu Peng,Xiao Jianxi
Proteases, such as trypsin, are essential for extracting collagen in various industrial applications. The potential applications of rare earth nanomaterials, specifically yttrium nanoparticles, have attracted significant interest across various fields due to their distinctive characteristics, including high dielectric constant and thermal stability. Biomineralization has emerged as a promising approach to synthesize protein-inorganic nanomaterials with hierarchical structures and desired functions. In the present investigation, a novel protease-templated biomineralization strategy was developed for synthesizing protease-(NH 4 ) 2 Y 3 F 11 •H 2 O hybrid nanomaterials using a one-pot method under very mild conditions. For modifying the morphologies of (NH 4 ) 2 Y 3 F 11 •H 2 O throughout biomineralization, protease has been demonstrated to be a highly promising biotemplate. Protease was utilized as a template for morphological control in the biomineralization procedure, which resulted in a gradual transformation of the initially formed (NH 4 ) 2 Y 3 F 11 •H 2 O octahedral structures into uniform nanospheres. The applicability of this approach was supported by successfully utilizing various proteases to synthesize protease-(NH 4 ) 2 Y 3 F 11 •H 2 O hybrid nanospheres. In addition to a strong and desirable luminescent signal, these hybrid nanospheres demonstrated extensive recycling because of their high enzymatic activity, stability and durability. The protease-mediated biomineralization approach offers an easy and robust approach to develop innovative protease-inorganic composites. Its moderate reaction conditions and simple operation render it a viable tool for developing stable and reusable enzyme reactors in various industrial applications. Graphical Abstract
研究领域:
生物化学
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材料科学
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工业应用
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DOI
Journal of Environmental Sciences
·
2022
·
IF 6.796
Jie Wen,Zewei Liu,Hongxia Xi,Bichun Huang
In this work, hydrothermal technique combined with KOH activation were employed to develop a series of porous carbons (NPCK- x ) using tobacco stem as a low-cost carbon source and (NH 4 ) 2 C 2 O 4 as a novel nitrogen-doping agent. Physicochemical properties of NPCK- x were characterized by Brunauer-Emmett-Teller, field emission scanning electron microscopy, X-ray diffraction, Raman microscope, elemental analysis, and X-ray photoelectron spectroscopy. Results showed that the NPCK- x samples possessed large surface areas (maximum: 2875 m 2 /g), hierarchical porous structures, and high degree of disorder. N-containing functional groups decomposed during activation process, which could be the dominant reason for appearance of abundant mesopores and well-developed pore structure. Dynamic chlorobenzene adsorption experiments demonstrated that carbon materials with (NH 4 ) 2 C 2 O 4 modification exhibited higher adsorption capacity (maximum: 1053 mg/g) than those without modification (maximum: 723 mg/g). The reusability studies of chlorobenzene indicated that the desorption efficiency of (NH 4 ) 2 C 2 O 4 modified porous carbon reached 90.40% after thermal desorption at 100°C under N 2 atmosphere. Thomas model fitting results exhibited that the existence of mesopores accelerated the diffusion rate of chlorobenzene in porous carbon. Moreover, Grand Canonical Monte Carlo simulation was conducted to verify that micropores with pore sizes of 1.2–2 nm of the optimized porous carbon were the best adsorption sites for chlorobenzene and mesopores with pore sizes of 2–5 nm were also highly active sites for chlorobenzene adsorption.
研究领域:
环境科学
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材料科学
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高影响因子
WATER RESEARCH
·
2026
·
IF 12.8
Wenrong Xiong,Yalan Zhang,Lijun Chen,Jiancheng Cheng,Ruimin Zhao,Wei Liu,Xiaohao Guo,Qi Li,Mengting Wu,Luoyan Ai,Xianchuan Xie
Rare earth mining and smelting generate substantial tailings and ammonia-rich wastewater, which present significant environmental hazards and hinder sustainable industrial growth. To mitigate these challenges, an innovative approach has been developed, utilizing conductive zeolites derived from rare earth tailings (RET) as flow electrodes in Flow-Electrode Capacitive Deionization (FCDI). This method offers dual benefits: recycling tailings and efficiently removing NH 4 + from wastewater. The optimized FCDI system, operating at 1.2 V with a flow rate of 19.2 mL/min and pH 4, demonstrates exceptional performance, achieving a 97.22 % NH 4 + removal efficiency in simulated wastewater and an average adsorption capacity of 195.45 mg/g. These results outperform conventional electrode materials such as activated carbon and mesoporous carbon derived from polyaniline. Mechanistic investigations show that the distinctive porous structure of RET-derived conductive zeolite Al 0.3 enhances ion exchange and electro-adsorption, promoting effective NH 4 + migration and enrichment. Pilot tests on real mining wastewater further confirm the practical viability of this technology, achieving 90.49 % NH 4 + removal and retaining 79.52 % of the recovered ammonia within the conductive zeolite. Notably, the ammonia-loaded conductive zeolite exhibits potential as a slow-release fertilizer. Plant trials indicate that applying only 1 % of this conductive zeolite fertilizer results in nearly threefold corn plant height growth and over twice the root length compared to controls, with heavy metal content well below national fertilizer standards (GB 38,400–2019). This technology marks a paradigm shift in the “waste-to-resource” cycle, effectively reducing tailings pollution and ammonia contamination while converting waste into valuable agricultural resources. By merging environmental remediation with sustainable agriculture, it offers a scalable solution that promotes circular economy principles in the mining industry, unlocking vast opportunities for wastewater treatment, tailings utilization, and eco-friendly fertilizer production.
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ACS Photonics
·
2025
·
IF 6.7
Yingming Wang,Lingyan Xu,Lu Liang,Zhentao Qin,Shuai Han,Chongqi Liu,Lixiang Lian,Wei Zheng,Yanyan Lei,Qinzeng Hu,Tao Wang,Wanqi Jie
Achieving real-time, high-sensitivity radiation detection with stability and precision remains a critical challenge in medical diagnostics and radiation therapy. Here, we report the development of MDABCO-NH4(BF4)3 single crystals (SCs), a metal-free perovskite material with exceptional performance for both X-ray and charged particle detection. Large-scale MDABCO-NH4(BF4)3 SCs (15 × 13 × 5 mm3) were synthesized via a simple low-temperature solution method, achieving superior crystallinity with a full width at half-maximum (fwhm) of 0.0061°. The MDABCO-NH4(BF4)3 detectors exhibit high resistivity (1.31 × 1012 Ω·cm), low trap density (1.09 × 109 cm–3), and excellent charge transport properties ((μτ)h = 3.15 × 10–5 cm2·V–1). For α-particle detection, the MDABCO-NH4(BF4)3 detectors achieve a high energy resolution of 35.0% at 5.49 MeV and a fast response time of 5 ms, demonstrating single-particle sensitivity. For X-ray detection, MDABCO-NH4(BF4)3 detectors exhibit high sensitivity (13,529 μC·Gyabs–1·cm–2) and an ultralow detection limit (17.1 nGyair·s–1), significantly lower than the 5.5 μGyair·s–1 standard for active personal dosimeters used in regular medical diagnostics. The combination of superior charge transport properties with stability and high signal-to-noise ratio establishes MDABCO-NH4(BF4)3 SCs as a versatile material for real-time radiation monitoring and high-precision medical imaging applications.
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APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Qingfeng Zhou,Yun Gong,Jianhua Lin
In the present work, Ni 2+ -doped (NH 4 ) 2 V 3 O 8 nanoflakes are in situ grown on Ni foam through a facile one-pot hydrothermal technique in a NH 4 VO 3 aqueous solution. The Ni 2+ -doped (NH 4 ) 2 V 3 O 8 @Ni foam composite material can be used as binder- and conductivity agent-free electrode in supercapacitor, it manifests a large specific capacitance of 465.5 F g −1 at a current density of 0.2 A g −1 and a superior rate capability of 317.5 F g −1 at 10 A g −1 , which is beneficial from its three-dimensional porous architecture cross-linked by the ultrathin Ni 2+ -doped (NH 4 ) 2 V 3 O 8 nanoflakes on Ni foam. Meanwhile, the Ni 2+ -doped (NH 4 ) 2 V 3 O 8 @Ni foam//Activated carbon asymmetric supercapacitor can deliver a maximum energy density of 20.1 W h kg −1 at a power density of 752.0 W kg −1 . Significantly, the Ni 2+ -doped (NH 4 ) 2 V 3 O 8 @Ni foam electrode possesses reversible electrochromic behavior, and it shows obvious visible light-driven photoresponse with much higher specific capacitance (645.3 F g −1 at 0.5 A g −1 ) under illumination (650 nm > λ > 350 nm, 100 mW cm −2 ), which is probably associated with the semiconducting characteristics of the spin-polarized (NH 4 ) 2 V 3 O 8 and the quantum confinement effect of the nanoflakes.
研究领域:
材料科学
·
能源存储与转换
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高影响因子
ChemSusChem
·
2023
·Vol. 16
·期 12
·e202300207
·
IF 8.4
Dewei Wang,Jiaqi Sun,Long Chen
Graphical NH 4 + storage : Structural reconstructed cobalt-iron layered double hydroxides featuring copious structure defects are reported as a high-capacity cathode for NH 4 + storage. The resulting sample can not only deliver a large reversible capacity but also act as the cathode for construction of ammonium-ion hybrid supercapacitors. Exploration of high-performance aqueous ammonium-ions hybrid supercapacitor has attracted tremendous research attention recently. Herein, structural reconstructed cobalt-iron layered double hydroxides (SR-CoFe LDHs) featuring copious structure defects (i. e., oxygen-vacancies, M−O bonds, MOO − bonds, coexistence of Co 2+ /Co 3+ and Fe 2+ /Fe 3+ ) are reported as a high-capacity cathode for NH 4 + storage. The resulting SR-CoFe LDHs can deliver a reversible capacity of 167.9 mAh g −1 at 0.5 A g −1 , which is 3.3 folds higher than that of pristine CoFe-LDHs. Ex-situ experimental results and theoretical studies denote that the presence of structural defects in the CoFe-LDHs can lower the NH 4 + adsorption energy and induced electron delocalization to enhance the electrical conductivity, rendering the CoFe-LDHs exhibits excellent performance for NH 4 + storage. As a proof of concept, ammonium-ion hybrid supercapacitor has been assembled with CoFe-LDHs as the cathode and hierarchical carbon as the anode, which can deliver a large specific capacitance of 238.3 F g −1 , long cycle stability over 10000 cycles, and high energy density of 66.2 Wh kg −1 within a wide working voltage of 2 V. Overall, this work offers some insights into the design of high capacity cathode for aqueous NH 4 + storage and also illustrates the construction of aqueous hybrid devices with NH 4 + as the charge carrier.
研究领域:
材料科学
·
电化学储能
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高影响因子
Reaction Chemistry & Engineering
·
2023
·Vol. 8
·期 5
·1185-1191
·
IF 3.9
Lingjiang Kou,Yong Wang,Jiajia Song,Taotao Ai,Koji Kajiyoshi,Panya Wattanapaphawong,Jintao Wang
Developing a structurally controlled electrode has attracted widespread attention in recent years, which is ascribed to the morphology of cathode materials having an influence on the electrochemical performance. Herein, we present Mn-decorated (NH4)2V10O25·8H2O (NVOH) materials with a cauliflower-like, tremella-like, and purslane-like structure via a solvothermal approach. When examined as a cathode material for aqueous zinc-ion batteries (ZIBs), all three materials with different morphologies exhibited superior electrochemical performances. Especially for materials with a tremella-like structure, benefiting from the uniqueness of the porosity structure of the tremella, the active material has a larger contact area with the electrolyte, which increases the active sites and diffusion coefficient of Zn2+. This tremella-like NVOH delivered a high rate capability of 159 mA h g−1 at 500 mA g−1 together with long-term stability (85% retention after 500 cycles at 500 mA g−1). This study has great significance for the exploitation of cathode electrodes of aqueous ZIBs with high reversible specific capacity and long cycle life and provides a promising candidate cathode for practical rechargeable aqueous ZIBs.
研究领域:
材料科学
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电化学
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Jian-hua Zu,Xiao-han Pan,Xing-dong Su,Feng Liu,Jie Zhan,Ye He,Jiu-geng Chen
The removal of zinc ions (Zn(II)) in water and the separation of zinc isotopes were fully investigated in this study. Imidodiacetic acid (IDA) type adsorbent (named PSGI) based on polystyrene spheres (PS) was synthesized by simultaneous irradiation grafting. By adsorption method, the removal of Zn(II) from water by the chelating adsorbent was studied in batch experiments. Under optimized condition, PSGI showed the removal efficiency of more than 98 % for Zn(II) and the adsorption capacity of 70.1 mg/g. Langmuir isothermal and pseudo-second-order kinetic model fitted the experimental results better, indicating that the adsorption is dominated by chemical adsorption. The spent adsorbent (PSGI-Zn) was used for further zinc isotope separation by displacement chromatography using EDTA-NH 4 solution as eluent. Due to the mass effect of isotopes, 70 Zn was found to preferentially fractionated into the front-end effluents with the highest front enrichment values of 70 Zn/ 64 Zn. By extending the migration distance to 20 m, we obtained the best isotope enrichment with the front maximum enrichment values as 1.0949, 1.0739 and separation coefficient values as 1.977 × 10 −3 , 8.33 × 10 −3 corresponding to the isotope pairs 66 Zn/ 64 Zn, 68 Zn/ 64 Zn.
研究领域:
环境科学
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化学
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材料科学
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高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2024
·Vol. 121
·期 37
·e2409201121
·
IF 9.4
Kang Xiao,Bo-Hao Xiao,Jian-Xi Li,Shunsheng Cao,Zhao-Qing Liu
Transition metal oxides ion diffusion channels have been developed for ammonium-ion batteries (AIBs). However, the influence of microstructural features of diffusion channels on the storage and diffusion behavior of NH4+ is not fully unveiled. In this study, by using MnCo2O4 spinel as a model electrode, the asymmetric ion diffusion channels of MnCo2O4 have been regulated through bond length optimization strategy and investigate the effect of channel size on the diffusion process of NH4+. In addition, the reducing channel size significantly decreases NH4+ adsorption energy, thereby accelerating hydrogen bond formation/fracture kinetics and NH4+ reversible diffusion within 3D asymmetric channels. The optimized MnCo2O4 with oxygen vacancies/carbon nanotubes composite exhibits impressive specific capacity (219.2 mAh g–1 at 0.1 A g–1) and long-cycle stability. The full cell with 3,4,9,10-perylenetetracarboxylic diimide anode demonstrates a remarkable energy density of 52.3 Wh kg–1 and maintains 91.9% capacity after 500 cycles. This finding provides a unique approach for the development of cathode materials in AIBs.
研究领域:
材料科学
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电化学
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能源存储
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高影响因子
DALTON TRANSACTIONS
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2026
·
IF 3.3
Hussin Elkik,Muhammad Mujahid Iqbal,Aqsa Munawar,Zhihua Yang,Fangfang Zhang,Shilie Pan
The development of robust strategies for designing high-performance ultraviolet (UV) birefringent materials has become a critical challenge. The combination of alkali metal and Ca2+ cations, which do not exhibit d–d or f–f transitions, with [NO3]− anions that possess high polarizability anisotropy results in the synthesis of three hydrated alkali metal calcium nitrates, ACa(NO3)3·2H2O (A = NH4, Rb, Cs). The title compounds were synthesized at room temperature using the water solution–evaporation technique, featuring a unique chain-like structure composed of [CaO9] polyhedra and [NO3]− units. The compounds exhibit notable optical properties, including short UV absorption edges (220–235 nm) and moderate birefringence (0.077–0.086 at 546 nm). Detailed structural investigation and theoretical analyses reveal that the birefringence is primarily due to the planar triangular arrangement of the [NO3]− groups. This research not only increases the structural diversity within inorganic materials but also provides a key approach for further studies of all-inorganic birefringent optical materials in the UV region.
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高影响因子
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