SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Na Yang,Xu Guo,Jing Yu,Yu Zhang,Qi Liu,Jiahui Zhu,Hongsen Zhang,Jun Wang
The integration of external field-enhanced effects such as the photothermal effect has emerged as a promising strategy for improving the adsorption efficiency of adsorbents toward Cs + and Sr 2+ due to its energy saving and high efficiency. Herein, a multifunctional photothermal adsorbent is rationally designed and synthesized via a simple one-step hydrothermal method and electrostatic assembly by combining V, W co-doped MoS 2 , P-MXene, and biomass-derived carbon aerogel (VWMoS 2 /P-MXene/C). Doping of V and W induces the phase transition of MoS 2 to the more active 1T phase, providing more accessible active adsorption sites. Moreover, the 3D porous structure of the biomass-derived carbon aerogel offers sufficient water transport channels, accelerating the diffusion kinetics of Cs + and Sr 2+ . The excellent photothermal conversion capability of the VWMoS 2 /P-MXene/C composite drives water evaporation, which promotes the increase of local concentrations of Cs + and Sr 2+ in the water medium. This synergistic mechanism combining phase engineering and photothermal enhancement collectively contributes to the excellent performance in Cs + and Sr 2+ capture. The VWMoS 2 /P-MXene/C demonstrates adsorption capacities of 158.3 mg/g for Cs + and 110.1 mg/g for Sr 2+ within 1 h, respectively, under photothermal enhancement. Simultaneously, the adsorbent exhibits excellent ion selectivity and reusability. The possible adsorption mechanisms mainly involve surface complexation and electrostatic interactions. Moreover, VWMoS 2 /P-MXene/C demonstrates a long-term solar-driven desalination capability with an evaporation rate of 1.98 kg·m −2 ·h −1 in natural seawater. Notably, the VWMoS 2 /P-MXene/C also shows promising application potential for dye removal and oil adsorption. This work provides a universal strategy for designing multifunctional integrated adsorbents and promotes their practical applications in radioactive wastewater treatment and seawater desalination
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DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Meidan Que,Boyue Zhang,Jin Chen,Hao Yuan,Qizhao Wu,Huayan Wang,Dongyun Gui,Bo Li
Defects located in the surface of quantum dots highly impact carrier dynamics and transfer, which would limit the photoelectric conversion efficiency (PCE) of perovskite quantum dot solar cells. Herein, we deposit high-quality FAPbBr3 quantum dot films through passivating Pb salts and conducting damage-free drying processes. The results indicate that the process of PbBr2 treatment and vacuum drying process fill both the Pb2+ and Br– vacancies and minimize the damage of the FAPbBr3 quantum dot film. The device assembled with this film achieved a champion PCE of 3.11% and involved an ultrahigh open-circuit voltage of 1.67 V or more. In addition, both the corresponding FAPbBr3 quantum dot films and devices exhibited higher humidity stability than the control films and devices. These studies will provide insights for designing high-quality perovskite quantum dot films with superior optoelectronic properties.
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Molecular Catalysis
·
2023
·
IF 4.6
Zizheng Zhu,Hongyan Zhang,Wen Guo,Hao Zhou,Yilin Zhou,Wenjie Liang,Maoshuai He,Wenxian Wei,Tingting Yu,Hong Zhao,Tao Yang
The highly efficient catalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are of great significance for electrochemical water splitting. Direct transforming nickel foam (NF) into nickel-based catalysts attracts extensive attention because of its excellent stability and high conductivity. However, the catalytic performances of this kind of catalyst are still far from expected. Herein, we report a series of Ni oxides co-modulated by Mo, V and M ( M =Mn, Fe, Co, Cu) as efficient catalysts for water splitting, which are directly prepared through a simple NF-transformation method. Especially, a MoVNi catalyst displays a low Tafel slope of 68 mV/dec and a small overpotential of 76 mV at 10 mA/cm 2 for HER in 1.0 M KOH solution. The OER performances of MoVNi can be greatly enhanced by M introduction. For example, Fe-MoVNi only requires 374 mV to achieve 100 mA/cm 2 and shows no declination in a-20 h stability test at 100 mA/cm 2 in 1.0 M KOH media. Such performances outperform the recently reported best-performing Ni oxides catalysts in an alkaline environment. The excellent catalytic performances suggest great promise in practical applications.
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Sustainable Energy & Fuels
·
2022
·Vol. 7
·期 3
·652-660
·
IF 6.813
Jiewen Tan,Zhen Wang,Jiawu Cui,Yuhua Chen,Zhanhui Jia,Mingyu Yang,Naziyila Gemingjiang,Zichun Xiao,Xiaowei Wang,Wangjiang Gao,Wensheng Tian,Chao Zhang,Wei Tang,Yuping Wu
Poly(ethylene oxide) (PEO)-based solid polymer electrolytes (SPEs) are considered promising candidates for next-generation high-safety lithium batteries, however, long-termly limited by their inferior ionic conductivity, low lithium ionic transference number, and insufficient electrochemical stability, especially at room temperature. Herein, we report a novel PEO-based SPE with the synergistic effect of black phosphorus (BP) nanosheets and a cryogenic method, which combined the advantages of the fast Li+ pathways of BP nanosheets and low PEO crystallization induced by the cryogenic process. The addition of BP nanosheets could promote the dissociation of LiTFSI and provide long-range Li+-migration pathways in the BP/PEO interface. The cryogenic strategy could reduce the sizes of the PEO crystals apart from the BP/PEO interface and further improve the ionic conductivity and Li+-transference number of the composite SPEs. As a result, the cryogenic PEO-based SPEs with only 0.05% wt BP nanosheets (C-BP SPEs) displayed an excellent ionic conductivity of 3.38 × 10−5 S cm−1, which was 15.7 times higher than that of pristine PEO SPEs, and a wide electrochemical stability at 30 °C. NCM622/SPEs/Li cells with C-BP SPEs could provide a high discharge capacity of 150.2 mA h g−1 at 0.1C as well as satisfactory cycling performance with a capacity retention of 88.1% after 500 cycles at 0.5C at 30 °C. Importantly, pouch cells were assembled to demonstrate the suitability of the C-BP SPEs for practical application and displayed good electrochemical performance.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ying Fang,Qianwen Liu,Yang Song,Feiyue Jia,Ying Yang,Haipu Li
Dissolved organic matter (DOM) extensively exists in high-arsenic groundwater with relatively high concentration, which could not only compete with arsenic for adsorption sites, but also depress As(III) oxidation in persulfate-based advanced processes (PS-AOPs) through scavenging free radicals (SO 4 • − and •OH). In order to effectively avoid the negative effect of DOM , an Fe/Co bimetallic metal–organic framework (Fe/Co MOF)-coupled peroxymonosulfate (Fe/Co MOF-PMS) system was rationally constructed for non-radical-dominated As(III) oxidation and chemisorption-driven As(V) adsorption. Results showed that the Fe/Co MOF-PMS system did realize anti-interference As(III) immobilization in DOM-rich high-arsenic groundwater, which was evidenced by no difference in As(III) immobilization efficiencies in the absence and presence of 20 mg/L humic acid (HA). During the oxidation process, 1 O 2 dominated As(III) oxidation while O 2 • − dominated HA oxidation, and the presence of HA significantly promoted the generation of 1 O 2 besides SO 4 • − and •OH. During the adsorption process, chemical adsorption mainly drove As(V) adsorption such as forming M-O-As (M = Fe, Co) bond, while physical adsorption forces played a major role in HA adsorption, such as π-π interaction, hydrogen bonding, and electrostatic attraction. The synergism of oxidation and adsorption processes made the anti-interference As(III) immobilization in DOM-rich high-arsenic groundwater in Fe/Co MOF-PMS system come true. This work is believed to shed light on the highly efficient purification of DOM-rich high-arsenic groundwater.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Pengkun Zhang,Qinhan Wu,Haoyu Wang,Dong-Hau Kuo,Yujie Lai,Dongfang Lu,Jiqing Li,Jinguo Lin,Zhanhui Yuan,Xiaoyun Chen
Herein, we established a Zn 3 (OH) 2 (V 2 O 7 )(H 2 O) 2 /V-Zn(O,S) Z-scheme heterojunction (labeled ZnVO/V-Zn(O,S) with a heterovalent V 4+ /V 5+ states and oxygen vacancies in both phases via a one-step in-situ hydrolysis method. The NaBH 4 regulated the ZnVO/V-Zn(O,S)-3 with rich Vo and suitable n (V 4+ )/ n (V 5+ ) ratio achieved an excellent photocatalytic nitrogen fixation activity of 301.7 μmol/(g·h) and apparent quantum efficiency of 1.148% at 420 nm without any sacrificial agent, which is 11 times than that of V-Zn(O,S). The Vo acts as the active site to trap and activate N 2 molecules and to trap and activate H 2 O to produce the H for N 2 molecules photocatalytic reduction. The rich Vo defects can also reduce the competitive adsorption of H 2 O and N 2 molecules on the surface active site of the catalyst. The heterovalent vanadium states act as the photogenerated electrons, quickly hopping between V 4+ and V 5+ to transfer for the photocatalytic N 2 reduction reaction. Additionally, the Z-scheme heterojunction effectively minimizes photogenerated carrier recombination. These synergistic effects collectively boost the photocatalytic nitrogen fixation activity. This study provides a practical method for designing Z-scheme heterojunctions for efficient photocatalytic N 2 fixation under mild conditions.
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JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Yongji He,Jiamin Zhang,Wei Li,Xiangtao Huo,Haokun Li,Min Guo,Mei Zhang
In order to achieve the harmless and resource-efficient treatment of hazardous elements in vanadium extraction tailings, a one-step reductive smelting separation process was developed to transfer the toxic elements Cr and V into a high valuable vanadium containing ferrochrome alloy. Under the optimal parameter of basicity 1.2, C/O molar ratio 1.2, holding temperature 1550 °C and holding time 50 min, the reduction rate of Fe, V and Cr from vanadium extraction tailings reached 96.14%, 95.98%, 93.60%, respectively, with the simultaneous production of Fe-Cr-V alloy and Ti-rich slag. The hardness of the alloy was 42.27 ± 0.65 HRC and the average friction coefficient was 0.678 ± 0.001, indicating that it basically meets the standards for wear-resistant materials. Toxicity leaching test results demonstrate that the leaching concentrations of Cr and V were 0.030 and 0.013 mg/L, respectively, which were 1/32 and 1/2825 of those in the original slag. These results confirm that the tailings have been effectively rendered harmless and detoxified. Hence, this one-step reductive smelting separation method synchronously realizes metal recovery, wear-resistant alloy preparation and Ti-rich residue co-production, achieving the complete utilization of hazardous vanadium extraction tailings, and provides an effective technical approach for the resource treatment of other toxic waste residues.
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PubMed
高影响因子
Advanced Energy Materials
·
2023
·Vol. 13
·期 22
·2300325
·
IF 27.8
Zhen Zhang,Tianping Wang,Weiwen Wang,Xiangnan Wang,Xianglin Luo,Chong Cheng,Xikui Liu
Metallophthalocyanines (MPcs) hold great promise in the electrochemical reduction of oxygen; however, their practical applications in energy storage and conversion are still limited by their low stability and poor water oxidation activity. Herein, a novel stable 2D imide-linked metalphthalocyanine framework (denoted as FePc-PI) is reported, that has atomically dispersed Fe-N 4 sites deposited on the KB substrate via in situ growth, followed by incorporation of ultrafine nickel oxide nanoparticles (NiO x @FePc-PI/KB) to induce bifunctional electrocatalytic activities for the oxygen reduction reaction and oxygen evolution reaction. Benefitting from the robust aromatic backbone, the engineered catalytic centers, and the unique electronic structures owing to the interaction between the Fe-N 4 sites and NiO x species, the newly developed NiO x @FePc-PI/KB catalyst exhibits excellent reversible oxygen bifunctional activity ( E 1/2 = 0.926 V, η 10 = 285 mV), delivering a record-low overpotential difference (Δ E ) of 0.59 V, which far exceeds the noble-metal-based Pt/C+RuO 2 benchmark (Δ E = 0.77 V) and represents the highest level for reported bifunctional electrocatalysts. Furthermore, the rechargeable aqueous Zn-air batteries assembled with the NiO x @FePc-PI/KB catalyst deliver a high peak power density of 232.9 mW cm −2 and long-term cycling durability over 1400 cycles. Flexible all-solid-state Zn-air batteries exhibit stable cycling at various flat/bent/flat states, thus demonstrating their excellent prospects in realistic implementations.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Li Liu,Zhian Jing,Min Zhang,Xuanting Zhao,Yeqing Lan,Cheng Chen
Herein, waste heating pad, which mainly contains iron and vermiculite components after calcination in air, was used to support cobalt-yttrium bimetallic oxide for the first time. The magnetic material (IV@CoY) was applied for the activation of peroxymonosulfate (PMS) to simultaneously realize the removal of p -arsanilic acid ( p -ASA) and the secondary inorganic arsenic (As(V)). 50 µM p -ASA was completely degraded in the system of IV@CoY (0.2 g/L) and PMS (0.5 mM) within 7 min, and about 99 % of the produced As(V) was adsorbed within 150 min. Electrochemical experiments illustrated that IV@CoY possessed the superior conductivity as compared to CoY, which greatly boosted PMS activation. The pseudo-first-order rate constant ( k IV@CoY ) was high up to 0.873 min −1 , which was 7.6 times larger than k CoY (0.115 min −1 ). Catalytic mechanism analyses revealed that the produced SO 4 •− , • OH and 1 O 2 participated in the oxidation of p -ASA and As(III). The adsorption of the produced As(V) was achieved by ion exchange with −OH/CO 3 2− on the surface of IV@CoY. The degradation pathways of p -ASA were further proposed on the basis of the detection of its intermediate products. Initial pH exerted a significant effect on the degradation-adsorption reaction and weak acidic or neutral condition was beneficial to the removal of p -ASA and As(V). To evaluate the practical application potential of IV@CoY, the disposal of p -ASA and secondary As(V) were also carried out in real water samples. Furthermore, IV@CoY was consecutively used for 5 times, and almost 100% degradation of p -ASA and over 97% adsorption of inorganic arsenic were still achieved even in the fifth round, which prove its high stability and reusability. Our results fully demonstrate that the magnetic IV@CoY is a promising catalyst to activate PMS for eliminating organoarsenic from water.
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高影响因子
Frontiers of Chemical Science and Engineering
·
2021
·Vol. 15
·期 5
·1269-1280
·
IF 4.204
Tang Gang,Zhao Ruiqing,Deng Dan,Yang Yadong,Chen Depeng,Zhang Bing,Liu Xinliang,Liu Xiuyu
A phosphine oxide-containing bio-based curing agent was synthesized by addition reaction between furan derivatives and diphenylphosphine oxide. The molecular structure of the as-prepared bio-based curing agent was confirmed by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. Dynamic mechanical analysis results indicated that with the increase of bio-based curing agent content, the glass transition temperature of epoxy/bio-based curing agent composites decreased, which was related to the steric effect of diphenylphosphine oxide species that possibly hinder the curing reaction as well as the reduction in the cross-linking density by mono-functional N-H. By the addition of 7.5 wt-% bio-based curing agent, the resulting epoxy composite achieved UL-94 V-0 rating, in addition to limiting oxygen index of 32.0 vol-%. With the increase of content for the bio-based curing agent, the peak of heat release rate and total heat release of the composites gradually decreased. The bio-based curing agent promoted the carbonization of the epoxy matrix, leading to higher char yield with good thermal resistance. The high-quality char layer served as an effective barrier to retard the diffusion of decomposition volatiles and oxygen between molten polymers and the flame. This study provides a renewable strategy for fabricating flame retardant and transparent epoxy thermoset.
研究领域:
材料科学
·
高分子化学
·
消防安全工程
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高影响因子
ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES
·
2023
·Vol. 238
·期 6
·1069-1070
·
IF 0.3
Yan-Qing Wang,Wen-Qing Yan,Li-Xue Nie,Ping-Ping Luan,Chao-Qun Li
C 20 H 22 Cu 3 N 8 O 10 , monoclinic, C 2/ c (no. 15), a = 12.0766(11) Å, b = 16.2778(14) Å, c = 14.7605(13) Å, β = 97.8580(10) ∘ , V = 2874.4(4) Å 3 , Z = 4, R
gt ( F ) = 0.0420, wR
ref ( F
2 ) = 0.0988, T = 298.15 K.
研究领域:
无机化学
·
晶体学
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Weilun Huang,Zitong Xu
A novel microalgae-derived magnetic nanocomposite was engineered for As speciation. • First application of a Chlorella-based sorbent to sports supplements. • Ultra-trace arsenic determination achieved with 0.05 μg kg −1 detection limit. • Speciation revealed arsenic occurs mainly in less-toxic organic forms. Reliable speciation of inorganic arsenic in complex dietary supplements remains analytically challenging because of severe matrix interferences and the low concentrations of toxic arsenic species. In this study, a novel magnetic nanocomposite (ZnO–ZnFe₂O₄@CHL-MNCs) derived from Chlorella biomass was synthesized and employed as an efficient sorbent for ultrasound-assisted dispersive magnetic micro-solid phase extraction (UA-D-μ-SPE) prior to graphite furnace atomic absorption spectrometry (GFAAS). The synergistic integration of ZnO, ZnFe₂O₄, and the porous biomass-derived carbon matrix provided abundant active adsorption sites, high magnetic responsiveness, and rapid phase separation, resulting in efficient enrichment of inorganic arsenic species. Under the optimized conditions, the proposed method exhibited a linear range of 0.15–100 μg kg −1 (R 2 = 0.994), a limit of detection of 0.05 μg kg −1 , an enrichment factor of 163, and satisfactory intra- and inter-day precisions of 4.1% and 6.3%, respectively. The method was successfully validated using a certified reference material (NMIJ CRM 7503a) and subsequently applied to the determination of As(III), As(V), total inorganic arsenic, and total arsenic in commercial sport and bodybuilding supplements. Spike recoveries ranging from 92.7% to 106.7% confirmed negligible matrix effects and excellent analytical accuracy. The proposed strategy offers a rapid, sensitive, and environmentally friendly approach for arsenic speciation in complex food matrices and represents a promising alternative for routine food safety monitoring. Download: Download high-res image (240KB) Download: Download full-size image
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