ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2019
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IF 4.527
Yunyun Li,Jiaxun Guan,Jiating Zhao,Bai Li,Yu-feng Li,Yuxi Gao
Mercury (Hg) pollution seriously threatens food safety and has attracted global attention. Phytoextraction, due to its low cost, applicability, and environmental friendliness, is considered a new technology for clean-up of heavy metal contamination in the environment. However, the low bioavailability of Hg in polluted areas greatly limits the applicability of phytoextraction. Here, we compared the effects of six common chelating ligands on the absorption and transport of Hg in maize ( Zea mays L.), which has a high biomass and short growth cycle. The results showed that the root length and biomass of maize seedlings of the groups treated with the six chelating ligands (EDTA, iodide, ammonium, thiosulfate , thiocyanate, and thiocarbamide) did not change compared with those of the non-treated groups. Co-exposure to Hg and each chelating ligand markedly alleviated the inhibitory effect induced by Hg. Iodide treatment resulted in the lowest root Hg content and highest translocation factor (TF) value, while ammonium treatment gave rise to the highest shoot Hg concentration and lowest TF. Compared with other chelating ligands, thiosulfate exhibited the maximum alleviation of Hg toxicity and achieved the highest concentration of Hg in the roots and aerial parts. Moreover, the TF and Hg accumulation in the thiosulfate and Hg co-exposed group were much higher than those in the group exposed to Hg alone. This finding suggests that, among these common chelating ligands, thiosulfate compounds have great potential for Hg phytoextraction, while the others can immobilize Hg in polluted areas.
研究领域:
环境科学
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植物学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2018
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IF 3.909
Yan-Jie Gu,Min-Liang Zhu,Yan-Li Li,Chun-Hua Xiong
A new type of magnetic metal chelating carrier (PCMM-IDA-Cu 2+ ) was prepared for the immobilization of papain, using chitosan as raw material, nano Fe 3 O 4 as magnetic material, SiO 2 as porogen, iminodiacetic acid (IDA) as a chelating ligand, and binding with transition metal ion (Cu 2+ ). The resulting products were well characterized by optical microscopy, scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The BBD (Box-Behnken Design) of RSM (Response Surface Methodology) was applied to analyze the optimum enzyme immobilization conditions. The results showed that the enzyme immobilization capacity was 94.18 mg/g of PCMM-IDA-Cu 2+ , with 7.976 U/mg of relative immobilized enzyme activity under the optimum conditions (pH 6.73, 1.56 mg enzyme/15.0 mg carrier, 30.9 °C), and the recovery of enzyme activity was reached 87.21%. Compared with the free papain, the immobilized papain displayed enhanced enzyme activity, superior enzymatic properties, good operational stability and reusability. It is worth mentioning that the novel carriers exhibited selectively biological adsorption capacity, and this technique is an alternative method for the immobilization of enzyme, making the process more efficient and economic.
研究领域:
生物化学
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酶工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Song Zhang,Yucong Zhou,Zhitao Shen,Yingying Li,Jian Song,Yicong Gao,Zezhi Wang,Bohao Zhang,Chong Chen,Rong Liu,Ying Liu,Ruirui Cao,Huilin Li,Fumin Li
The long-term stability of perovskite films remains a critical challenge hindering the commercialization of perovskite solar cells (PSCs). Crystal facet engineering has emerged as one of the most promising strategies to enhance film stability. Herein, we introduce a series of bidentate nitrogen-based chelating ligands to precisely regulate the growth of perovskite films. Density functional theory calculations reveal that these ligands interact with lead ions in lead iodide, guiding perovskite crystal growth along the [111] orientation, which has been proven to possess excellent environmental stability. Furthermore, these interactions facilitate efficient charge transfer. X-ray diffraction results confirm that the chelating ligands promote preferential crystallization along the [111] direction. Long-term structural monitoring demonstrates that [111]-oriented films exhibit superior stability under ambient conditions. As a proof of concept, 3,4,7,8-tetramethyl-1,10-phenanthroline, a bidentate nitrogen-based ligand, was employed in formamidinium-lead-iodide-based PSCs, achieving a remarkable power conversion efficiency of 22.02% with exceptional operational stability. Detailed optoelectronic analyses further validated the reliability of this approach. These findings provide a mechanistic understanding of how chelating ligands stabilize perovskite films and present a viable strategy to enhance PSC performance, thus advancing their practical application in next-generation photovoltaic technologies.
研究领域:
材料科学
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光伏技术
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化学工程
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产品关联
DOI
高影响因子
ACS Nano
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2025
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IF 16
Ao Li,Jing Hao,Kai Wu,CaiYun Chang,XiangYong Zhang,He Gan,Jin Tan,Ting Xie,Fu Zhou,PengCheng Wang,CuiPing Han,HongDa Du,BaoHua Li,Qi Liu
Due to the inherent redox potential of the zinc metal anode (ZMA), it is susceptible to corrosion and dendrite formation in aqueous electrolytes. These issues compromise the electroplating-stripping process at the electrolyte–electrode interface, adversely affecting the reversibility of aqueous zinc-ion batteries (AZIBs). Here, we propose a chelating-ligand additive (i.e., DS) strategy to construct in situ an inorganic/organic hybrid bilayer interface. The organic molecule enriched in -PO3 groups is calculated to preferentially adsorb onto the surface of ZMA. During subsequent reactions, these adsorbed molecules decompose preferentially due to their low lowest unoccupied molecular orbital energy level (0.34 eV), forming a Zn(PO3)2-enriched inorganic solid electrolyte interphase (SEI) layer. Simultaneously, the intermediate carbon skeleton cross-links, creating an organic layer atop the SEI, thereby forming an inorganic/organic hybrid SEI bilayer interface. This bilayer SEI interface effectively inhibits corrosion and hydrogen evolution reactions (HERs) while regulating the Zn2+ ion flux at the interface, inducing uniform Zn depositions. Consequently, the Zn||Zn symmetric battery demonstrates a long-term cycling lifespan exceeding 1700 h at 5 mA cm–2. The Zn||I2 pouch battery yielded a capacity retention of 71.3% after 1100 cycles. This synergistic modulation strategy offers insights into the development of ZMA stabilizer additives, potentially advancing the performance and durability of AZIBs.
研究领域:
材料科学
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电化学
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储能技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
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2019
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IF 3.481
Di Duan,Baogen Su,Zongbi Bao,Yiwen Yang,Qilong Ren
A series of highly CO 2 -soluble open-chain crown ether bridged diphosphates were designed and prepared as chelating ligands which were used to extract lanthanide ions from cellulose paper into supercritical CO 2 (ScCO 2 ). These ligands were designed by introducing different ester side chains and joining the two phosphorus groups with different length of ethylene oxide group which could provide enhanced solubility and complexation ability. The solubility data of these synthesized diphosophates in ScCO 2 were measured at 313.15 K and 10.65 MPa–13.69 MPa. Lanthanides metal ions including La 3+ , Ce 3+ , Pr 3+ , Nd 3+ , Sm 3+ , Gd 3+ , Er 3+ , and Yb 3+ were successfully removed from the solid matrix by supercritical fluid extractions using these chelating ligands at 313.15 K and 20 MPa. The extraction efficiency of metal ion was affected by chelating ligands’ side chain, which increased from 68% to 94% mainly driven by the increased solubility capability.
研究领域:
化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
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