Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yan Li,Tianxin Zhou,Dan Zhou,Yi Huang,Jinshu Zhang,Yubin Li,Chengye Yang
The long-term accumulation of vanadium-titanium (V-Ti) magnetite tailings has caused severe soil and groundwater pollution through metal leaching, which is exacerbated by light-driven redox reactions and organic acid-mediated mineral dissolution. However, the mechanisms of metal leaching from tailings and their subsequent transformation under the combined effects of light and natural organic acids remain unclear. This study investigated the release and transformation mechanisms of heavy metals from V-Ti magnetite tailings under three organic acids (citric, oxalic, and acetic) and light exposure. Results showed that in dark conditions, citric acid (CA) had the strongest metal dissolution capacity for Fe, V, Mn, and Al, followed by oxalic acid (OA) and acetic acid (AA), achieving 2.5-5.2 times higher release than inorganic acids. CA promoted metal release through stable tricarboxylate complexes, while OA dominated in acidic conditions via Fe(II)-oxalate radical formation but declined at pH > 5 due to iron oxalate precipitation. AA, with its monocarboxylate structure, had limited complexation capacity, achieving only 20-30% of CA’s leaching efficiency, primarily weakening the mineral surface through proton attack. Under light exposure, Fe(II) release increased by 200-500% via ligand-to-metal charge transfer (LMCT), triggering Eh fluctuations (>300 mV), rapid pH elevation (ΔpH = 4.0 in 2 h), and colloidal nanoparticle formation (209.6 nm, ζ = -49.9 mV). Elevated temperatures accelerated initial leaching but enhanced metal immobilization through hydrolysis. The study demonstrated that organic acids and light exposure are key drivers of heavy metal release from V-Ti magnetite tailings, with light playing a crucial role in catalyzing these processes.
研究领域:
环境科学
·
地球化学
·
环境工程
·
化学海洋学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Dashuai Li,Qi Wu,Changhua Wang,Zhehao Sun,Yingying Li,Zongyou Yin,Yichun Liu,Xintong Zhang
Transition metal high-entropy alloys (HEAs) demonstrate exceptional catalytic performance due to their structural complexity, featuring rich local atomic configurations, tunable electronic structures, and abundant active sites. However, this structural versatility poses both thermodynamic and kinetic challenges to conventional wet-chemical synthesis routes. Herein, we develop a novel solution plasma strategy that enables the direct synthesis of HEA catalysts in aqueous media. Through the FeCoNiCrMn electrode discharge in pure water, uniform HEAs nanoparticles (≈200 nm) are successfully anchored onto a variety of oxide substrates. The HEAs/TiO 2 catalyst achieves a CO generation rate of 298.1 mmol/g HEAs /h, representing ca. an order-of-magnitude higher activity than single-metal catalysts under both thermocatalytic and photothermal conditions. Advanced structural characterization reveals a dual-phase core-shell architecture consisting of a metallic alloy core and surface oxides preferentially enriched at CrMn sites. This spatially resolved structure enables cooperative catalysis, where CrMn-rich oxide domains promote H 2 dissociation, CoNi metallic regions facilitate CO 2 reduction, and Fe sites present in mixed valence states serve as electron and oxygen transfer bridges. We further identify a self-limiting oxidation mechanism intrinsic to plasma synthesis, which ensures charge redistribution at the metal-oxide interfaces and synergistically enhances photothermal catalysis. This work establishes an energy-efficient synthetic route for HEAs and elucidates structure-function relationships critical for advancing multimetallic catalytic systems.
研究领域:
材料科学
·
催化
·
纳米技术
·
等离子体化学
·
能量转换
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NATURE MATERIALS
·
2024
·Vol. 23
·期 12
·1645-1653
·
IF 37.2
Wang Yaoyu,Yi Chenqi,Tian Wenxiang,Liu Feng,Cheng Gary J.
Nanoscale three-dimensional (3D) printing of metals and alloys has faced challenges in speed, miniaturization and deficiency in material properties. Traditional nanomanufacturing relies on lithographic methods with material constraints, limited resolution and slow layer-by-layer processing. This work introduces polymer-free techniques using two-photon decomposition and optical force trapping for free-space direct 3D printing of metals, metal oxides and multimetallic alloys with resolutions beyond optical limits. This method involves the two-photon decomposition of metal atoms from precursors, rapid assembly into nanoclusters via optical forces and ultrafast laser sintering, yielding dense, smooth nanostructures. Enhanced near-field optical forces from laser-induced localized surface plasmon resonance facilitate nanocluster aggregation. Our approach eliminates the need for organic materials, layer-by-layer printing and complex post-processing. Printed Mo nanowires show an excellent mechanical performance, closely resembling the behaviour of single crystals, while Mo–Co–W alloy nanowires outperform Mo nanowires. This innovation promises the customizable 3D nanoprinting of high-quality metals and metal oxides, impacting nanoelectronics, nanorobotics and advanced chip manufacturing.
研究领域:
材料科学
·
纳米技术
·
光子学
·
制造工程
·
光学工程
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Qi Zou,Qichi Le,Xingrui Chen,Yonghui Jia,Chunyan Ban,Tong Wang,Henan Wang,Ruizhen Guo,Liang Ren,Andrej Atrens
This paper investigates the microstructure, corrosion, electrochemical behavior, and the discharge performance of Gallium (Ga) alloyed Mg-Al-Zn alloys using the gravimetric method, electrochemical measurements, and battery test. The average grain size of AZ80–2.5Ga (Mg-8Al-0.5Zn-2.5Ga alloy) is 36% smaller than that of AZ80 (Mg-8Al-0.5 Zn alloy). The number and size of the Mg 17 Al 12 phase particles are smaller and more homogeneously distributed. Ga reduces the self-corrosion rate, increases the electrochemical activity and the discharge performance. The grain refinement generates many grain boundaries on the surface and promotes discharge performance. The decrease of the self-corrosion rate is attributed to the suppression of the protective film that inhibits the anode consumption. The AZ80–2.5Ga anode has the optimal discharge capacity of 1437 mAh g − 1 and anode efficiency of 61% at 50 mA cm −2 , which are 25% and 29% higher than for the AZ80 anode.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Ning Sui,Fengya Liu,Ke Wang,Fengxia Xie,Lina Wang,Juanjuan Tang,Manhong Liu,William W. Yu
In this work, gold nanoparticles were synthesized, the introduction of Hg 2+ led to the formation of Au-Hg amalgam , which was found to possess an enhanced peroxidase-mimicking activity towards H 2 O 2 -mediated oxidation of 3, 3′, 5, 5′-Tetramethylbenzidine (colorless) to produce a blue product. This color reaction was exploited as a sensitive and selective method for colorimetric detection of Hg 2+ and H 2 O 2 , the linear ranges were 0.1–5 nM and 0.5–100 μ M, respectively. Furthermore, a test strip was successfully designed, it exhibited high sensitive, rapid and low cost for Hg 2+ and H 2 O 2 detection. More importantly, the colorimetric method could be successfully applied to real sample application in solution and in a test strip.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2020
·Vol. 22
·期 7
·3953-3958
·
IF 3.43
Jingbo Qi,Xun Hu
The reduction of ZnO in a ZnO-supported catalyst to metallic zinc, the alloying of metallic zinc with a second metal and the evaporation of zinc species in a reductive atmosphere of hydrogen was investigated in this study. The results show that the reduction temperature was the determining factor for the transformation of zinc species. The complete removal of ZnO in a ZnO-supported catalyst can be achieved at 700 °C. The effects of different metals supported on ZnO on the transformation of ZnO were also investigated. Cu, Co and Ni species can slow the ZnO loss due to the priority for the reduction of these metal oxides and the formation of metal–Zn intermetallics. Fe based catalysts noticeably accelerated the loss of ZnO, which can be ascribed to the high oxophilicity of Fe and the strong interactions between the metal and support.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 45
·29003-29009
·
IF 4.036
Fan Sun,Zhao Liu,Jiawei Lin,Jun Deng,Zhongnan Guo,Wenxia Yuan
The magnetic semiconductor in a two-dimensional system is a major subject for both theoretical and experimental investigations. Here we report the synthesis of a new quaternary manganese chalcogenide KMnCuTe2, which shows layered structure and antiferromagnetic (AFM) semiconducting features. Single crystals of KMnCuTe2 were obtained using a self-flux method and based on single-crystal X-ray diffraction, KMnCuTe2 adopts the ThCr2Si2-type structure composed of edge-sharing tetrahedral layers separated by K+ cations. The Mn and Cu atoms randomly distribute in the centre of tetrahedral units. Attributed to the large radius of Te, KMnCuTe2 has large lattice parameters (a = 4.3115(3) Å and c = 14.9360(20) Å), leading to a long metal–metal distance (3.049 Å) in the tetrahedral layers. Based on the experiments and theoretical calculations, KMnCuTe2 exhibits a G-type AFM interaction with the transition temperature at around 225 K and an indirect semiconducting nature with the band gap of 0.95 eV. The magnetic semiconducting property of KMnCuTe2 is unique in AMnMCh2 systems (A = Li, Na, K, M = Cu, Ag and Ch = S, Se, Te), which could be associated with the large metal–metal distance. Our work not only highlights the role of metal–metal interactions on regulating the properties of ThCr2Si2-type compounds, but also provides a feasible strategy to obtain the layered magnetic semiconductor.
研究领域:
材料科学
·
凝聚态物理
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2013
·
IF 5.437
Lichun Zheng,Xiaoyan Li,Panpan Liu,Guofan Wu,Xiaoquan Lu,Xiuhui Liu
We present a novel strategy for simultaneous electrochemical detection of multiple DNA targets based on the use of different encoding metal ions as tags. The principle of this scheme is that metal ions bound to metallothionein (MT) molecules can be released down after hybridization with DNA targets and then be detected by stripping voltammetry . The novel detection probes, ssDNA/MT conjugates , covered with different metal ions were synthesized for the first time, then three encoding metal ions (Zn 2+ , Cd 2+ , and Pb 2+ ) were used to differentiate the signals of three virus DNA due to their well-defined anodic stripping peaks at −1.13 V (Zn), −0.78 V (Cd), and −0.52 V (Pb) at BiFE , respectively. The anodic peak currents increased linearly with the concentrations of DNA targets in the range from 0.1 nM to 10 nM with a detection limit of 33 pM. In addition, the one-base mismatched target was effectively discriminated from the complementary target. The described results demonstrated that this method possesses high sensitivity and selectivity for multi-target DNA assay and has great potential in applications for detection of even more targets in biological assays , particularly immunoassays .
研究领域:
生物化学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2021
·Vol. 2021
·期 12
·1152-1159
·
IF 2.524
Quansen Wu,Gongguo Zhang,Yanyun Ma,Mengfan Li,Feng Liu,Hongwen Huang,Maochang Liu,Yiqun Zheng
Graphical Wavy gold-silver alloy nanowires with tunable diameters in the range of 2–10 nm are prepared via an ultrafast seed-mediated co-reduction. Their UV-vis extinction spectra show a broad absorbance band in the range of 450–550 nm. We report an ultrafast synthesis of wavy gold-silver (AuAg) nanowires with tunable diameters via a seed-mediated co-reduction. The success of current strategy relies on the use of an elevated reaction temperature to accelerate the synthesis to be completed within several minutes and the use of Au seeds with controlled sizes to enable the manipulation over their diameters in the range of 2–10 nm. The presence of chloride-contained quaternary ammonium surfactant and excessive reductant have been demonstrated to be critical for the high-yield formation of AuAg products with the unique morphology of wavy nanowire. Due to the advantage in size control, the size effect on the plasmonic behavior of AuAg alloy wavy nanowires is investigated, where the products with sub-5 nm diameter exhibit a broad shoulder absorbance peak in their spectrum.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Tengfei Long,Hongmei He,Jizhou Li,Mengke Yuan,Jianjia Wei,Zhongde Liu
Inspired by the knowledge that the chiroptical activity of Cu and Ag nanoclusters (NCs) is generally about several-fold larger than that of the corresponding Au NCs but poor stability and that alloy metal particles often demonstrate unique stability, in this contribution the synthesis of the chiral Au–Cu alloy NCs was attempted via reduction of varying mole fractions of metal precursors by sodium borohydride in the presence of d-/l-penicillamine (d-/l-Pen), to gain insights into the alloying effect on the chiroptical activity. As a result, the g factors of ∼0.57 × 10–3, obviously larger than that of the pure Au NCs, are found for the bimetallic Au–Cu NCs, suggesting that the incorporation of Cu heteroatoms plays a dramatic role for the creation of the strong optically active metal nanostructures. More importantly, compared with those of monometallic Cu counterparts, the optical active stability of bimetallic Au–Cu NCs is obviously improved because of the alloy formation. The location of the copper dopant, observed from the transmission electron microscopy results and deduced by the X-ray photoelectron spectroscopy measurements, can be speculated to be incorporated in both the “core” region and the “staple” region. Additionally, it was found that the different thiolated chiral molecule ligands exert influence on the chiroptical behavior of the Au–Cu NCs. Thus, the alloy formation strategy could produce novel nanostructures with the characteristic of large and stable chiroptical activity.
研究领域:
纳米材料科学
·
物理化学
·
材料化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOILS AND SEDIMENTS
·
2020
·Vol. 21
·期 1
·215-234
·
IF 2.763
Wei Liang,Ding Qian,Guo Huaming,Xiu Wei,Guo Zhengcai
Purpose Heavy metal/metalloid pollution in sewage-irrigated soils (SIS) is one of the major environmental issues in China. Mobility of heavy metals/metalloids in the contaminated soils and their potential threats to groundwater are needed to be understood. This study investigated impacts of organic matter, solution pH, and water level on forms and migration of heavy metals/metalloids (As, Cr, Cu, Pb, and Cd) in the contaminated soils from a typical sewage-irrigated area in the North China Plain (NCP). Materials and methods Based on extensive field measurements, two sewage-irrigated sites and a non-sewage-irrigated site were selected in the study area. Soil samples were collected every 10 cm in a profile (no more than 1 m) from each site. The release and mobility of heavy metals/metalloids in the SIS were investigated using column experiments with two leaching stages (stage I: low water level; stage II: high water level). Deionized water, synthesized acid rain, and poultry manure extractant were used as influents for different columns to stimulate leaching of rainfall, acid rain, and compost leachate, respectively. Soil samples before and after leaching were subjected to sequential extraction for 7 target phases, evaluating the impacts of three leaching conditions on forms of heavy metals/metalloids in soils at different depths. Results and discussion Results revealed that more As and Cu were mobilized in the column with a compost leachate as the influent than the columns with organic matter-free influents, resulting from reductive dissolution, complexation, and desorption. Cr and Pb concentrations were higher in effluents from the column with low pH influent (acid rain) than those from near-neutral pH influents (rainfall and compost leachate). Proton-promoted desorption and dissolution of very amorphous Fe oxides was the major cause for mobilized Cr and Pb in porewater. Moreover, decrease in dissolved oxygen (DO) was observed with the increase in water level in the column, triggering microbial respiration of Fe/Mn oxide reductions in the presence of bioactive dissolved organic matter, which elevated concentrations of porewater heavy metals/metalloids. Conclusions This study suggested that sewage irrigation significantly increased heavy metal/metalloid contents associated with labile and bioavailable fractions in the SIS, and both the compost leachate and low pH solution should enhance the mobility of heavy metals/metalloids in the SIS and potentially contaminate groundwater.
研究领域:
环境科学
·
土壤学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 2
·1778-1786
·
IF 2.478
Ding Ling,Zeng Min,Wang Huan,Jiang XiaoBing
In the present study, to broaden the application of metal–organic framework (MOF) materials in electronic functional materials, a simple solvothermal method was adopted to introduce bimetals, and metal–organic framework compounds (MIL-101 (Fe), MIL-101 (Fe, Co), MIL-101 (Fe, Cu)) acted as the templates. The hollow structures of Fe 2 O 3 , CoFe 2 O 4 , and CuFe 2 O 4 were formed through the simple calcinations at 600 °C for 3 h in Ar atmosphere. When the mentioned materials exhibiting hollow structures were tested as the negative electrode of a lithium-ion battery, introducing bimetals was reported to be able to improve their electrochemical performance. For instance, CoFe 2 O 4 and CuFe 2 O 4 were cycled 300 times under a high current density of 1000 mA/g, and the reversible capacity remained to be 978 mAh/g and 774 mAh/g. When 200 cycles were performed under a current density of 200 mA/g, these materials exhibited high specific capacities of 1118 mAh/g and 1155 mAh/g.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）