CHEMICAL PHYSICS LETTERS
·
2021
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IF 2.328
Fanggong Cai,Xiaobo Lei,Jiao Geng,Wei Sun,Jun Chen,Sude Ma,Qinyong Zhang
The homologous Pb m Bi 2n X m+3n (X = S, Se, Te) is expected as solar cells or thermoelectric materials. Herein, stable phases of ternary PbBi 2 S 4 microspheres were successfully synthesized by two solution-phase-methods assisting with EDTA-2Na in aqueous media, namely traditional chemical reaction under atmospheric pressure and hydrothermal method under high pressure. Field-emission scanning electron microscopy and X-ray diffraction were used to characterize and determine the morphology and structure of the product. EDTA-2Na plays critical roles in the crystallization process of uniform PbBi 2 S 4 microspheres. A mechanistic model is proposed to account for these experimental findings. Furthermore, the optical band gaps of PbBi 2 S 4 were investigated as well.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
Separations
·
2025
·Vol. 12
·期 8
·205
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IF 2.7
Yannan Lv,Shenrui Han,Wenqing Wen,Xinzhu Bai,Qiao Sun,Li Chen,Haonan Zhang,Fansong Mu,Meng Luo
This study developed a new magnetic adsorbent from waste coconut shells using high-temperature carbonization, EDTA-2Na chelation, and Fe3O4magnetic loading. Response surface methodology optimized the preparation conditions to a mass ratio of activated carbon: EDTA-2Na:Fe3O4= 2:0.6:0.2. Characterization (SEM, XRD, FT-IR, and EDS) showed that EDTA-2Na increased the surface carboxyl and amino group density, while Fe3O4loading (Fe concentration 6.83%) provided superior magnetic separation performance. The optimal adsorption conditions of Cu2+by EDTA-2Na-Fe3O4-activated carbon composite material are as follows: when pH = 5.0 and the initial concentration is 180 mg/L, the equilibrium adsorption capacity reaches 174.96 mg/g, and the removal rate reaches 97.2%. The optimal adsorption conditions for Pb2+are as follows: when pH = 6.0 and the initial concentration is 160 mg/L, the equilibrium adsorption capacity reaches 157.60 mg/g, and the removal rate reaches 98.5%. The optimal adsorption conditions for Cd2+are pH = 8.0 and an initial concentration of 20 mg/L. The equilibrium adsorption capacity reaches 18.76 mg/g, and the removal rate reaches 93.8%. The adsorption followed the pseudo-second-order kinetics (R2> 0.95) and Langmuir/Freundlich isotherm models, indicating chemisorption dominance. Desorption experiments using 0.1 mol/L HCl and EDTA-2Na achieved efficient desorption (>85%), and the material retained over 80% of its adsorption capacity after five cycles. This cost-effective and sustainable adsorbent offers a promising solution for heavy metal wastewater treatment.
研究领域:
环境科学
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材料工程
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化学工程
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2024
·Vol. 53
·期 6
·3089-3099
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IF 2.2
Zhao Wenxia,Hui Kaihong,Zhao Wei,Chen Huaijun,Cui Yubo,Li Xinwei,Liu Xin,Song Yifan,Hui Kaining,Yan Yani,Qiao Liang,Wang Zenglin
The effects of additives on the deposition rate, surface morphology, Ni and P elemental content of the electroless plating layer, and roughness of the electroless plating Ni-P layer were investigated. In an electroless plating Ni-P system, ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) and sodium hypophosphite monohydrate were used as the complexing agent and reductant, respectively. The linear sweep voltammetry (LSV) polarization curve results showed that the compound addition of 1.0 mg L −1 L-tyrosine, 2.0 g L −1 saccharin, and 6.0 mg L −1 sodium dodecyl sulfate (SDS) could inhibit sodium hypophosphite oxidation and nickel ion reduction, which eventually reduced the Ni-P deposition rate. The Tafel polarization curves indicated that the compound additives obviously improved the corrosion resistance of the Ni-P electroless plating layer. Field emission scanning electron microscopy (SEM) images showed that the composite additives generated fine and uniform Ni-P electroless plating particles and enhanced the density, eliminated the surface cracks, and reduced the pinholes on the electroless plating layer surface. Atomic force microscopy (AFM) tests showed that the addition of complex additives improved the smoothness of the plated layer, the R a value was reduced from 135.0 nm to 53.2 nm, and the R q value was reduced from 164.0 nm to 93.0 nm. The final composition and implementation conditions of the EDTA-2Na-based Ni-P electroless plating system were determined. The deposition rate was 10.44 μm h −1 , the P content of the electroless plating layer was 2.2%, and the electroless plating player was silver-white and bright. Graphical Abstract
研究领域:
材料科学
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电化学
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表面工程
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DOI
高影响因子
Journal of CO2 Utilization
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2020
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IF 5.993
Chengyi Dai,Xiao Zhao,Borui Hu,Xinbao Zhang,Qunxing Luo,Xinwen Guo,Xiaoxun Ma
Capturing and utilization of carbon dioxide (CO 2 ) not only leads to effective use of carbon resources, but also alleviates environmental pollution caused by increasing concentration of CO 2 , thus making it a hot research topic in recent years. In this study, a series of highly dispersed iron-cobalt (Fe-Co) catalysts was prepared by ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) modification, which could efficiently convert CO 2 into high value-added chemicals (C 2 -C 4 = and C 5 -C 11 ). X-ray diffraction (XRD) analysis showed that the addition of a small amount of Co and EDTA-2Na contributed to enhance the sintering resistance of Fe species. During the calcination process, EDTA 4− can be decomposed into small organic molecules with reducibility, thus promoting the reduction of iron species. The CO temperature-programmed desorption (CO-TPD) results showed that cobalt enhanced the adsorption and activation of intermediate CO on Na x Fe-Co catalyst, thereby promoting the catalytic conversion of CO 2 . The complexation of EDTA promotes the synergistic effect of Fe-Co bimetals, enhances the chemical adsorption of CO 2 . Sodium in EDTA-2Na promotes the surface basicity of the catalysts, which is favored for improving the product distribution of hydrocarbons. At lower H 2 /CO 2 (1/1) ratio, the EDTA-2Na modified Fe-Co/Al 2 O 3 catalyst exhibited high conversion of CO 2 (32.8 %) and excellent selectivity toward high value-added chemicals. The selectivity of by-product CO was only 8.1 %; and C 2 -C 4 = (32.5 %) and C 5 -C 11 (46.3 %) accounted for ∼79 % selectivity among the hydrocarbons generated.
研究领域:
催化化学
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环境科学
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材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Huiwei Ding,Zhihao Wang,Yu Guan,Rongyao Ma,Xin Tang,Qiaofeng Han
The effect of EDTA-2Na on the photocatalytic performance of bismuth-based compounds varied with their chemical compositions and EDTA dosage. For Bi 2 O 3 and Bi 5 O 7 I with high Bi/anions ratios, coordinating with EDTA-2Na at molar ratios of 1.5:1 for Bi 2 O 3 and 5:1 for Bi 5 O 7 I significantly improved photocatalytic activity of methyl violet (MV, 50 mg·L -1 ) degradation under visible irradiation, with apparent rate constants ( k ) of 0.0715 min −1 and 0.0261 min −1 , which were 102 and 44 times of those for pure Bi 2 O 3 and Bi 5 O 7 I, respectively. Besides, these samples also exhibited enhanced adsorption performance to cation dye MV due to decreased zero zeta potential. However, If the molar ratio of EDTA to Bi 2 O 3 exceeded 4:1 and the molar ratio of EDTA to Bi 5 O 7 I exceeded 5:1, the samples possessed the poor photocatalytic performance for the degradation of MV, even inferior to pure Bi 2 O 3 and Bi 5 O 7 I. Conversely, BiOX (X = Br, I) and Bi 2 O 2 CO 3 with low Bi/anion ratios didn’t show significant improvement in photocatalytic activity, and BiVO 4 and Bi 2 MoO 6 with lower Bi/anion ratios exhibited even worse photocatalytic performance after coordinating with EDTA-2Na. Photocatalytic mechanism suggests that EDTA-2Na’s electron transfer capabilities to the conduction band of high Bi/anion ratio compounds promote reactive oxygen species generation, enhancing their photocatalytic performance. For the low Bi/anion ratio compounds, the electrons of EDTA would transit to VB and trap the holes, hindering the hole-dominant photo catalysis process.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 7
·1-11
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IF 2.8
Li Xinwei,Zhao Wenxia,Cheng Yi,Liu Xin,Hui Kaihong,Zhao Wei,Song Yifan,Zhu Qian,Chen Huaijun,Cui Yubo
In the processing technology of printed circuit boards, the common electroless copper plating technology of ethylenediaminetetraacetic acid disodium (EDTA-2Na) has the problems of large surface stress, uneven crystal particles, and large surface roughness of the copper plating layer. To remedy the above shortcomings and meet the current requirements for copper interconnects in printed circuit boards (PCBs), the present study has investigated a chemical copper plating system that combines a high deposition rate with low stress. An electroless copper plating was then performed on a polyacrylonitrile-butadiene-styrene (ABS) plastic resin plate with 2,6-diaminopyridine (2,6-DAP), 2,2-bipyridine, sodium hydroxyethyl sulfonate (SHES) and NiSO 4 ·6H 2 O as supplementary additives. By using scanning electron microscopy (SEM), electrochemical, atomic force microscopy (AFM), and X-ray diffraction (XRD) analyses, it has been shown that the average surface roughness Ra became reduced from 202 nm to 76.1 nm when using additives in the chemical copper plating process. Also, the internal stresses of the deposited copper layer on the (220) and (311) planes of a crystalline copper layer decreased from − 70.48 and − 53.03 to − 27.31 and − 27.16 MPa, respectively. The composite additive improved the quality of the copper layer of the EDTA-2Na-based chemical copper plating system, increasing the practical range of industrial applications and facilitating the subsequent application of higher-precision processing.
研究领域:
化学镀
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材料科学
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表面工程
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微电子制造
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化学添加剂
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Shengyu Shao,Xingting Liu,Renshu Wang,Yuanyuan He,Changhao Bian,Pengfei Sun,Xiaoping Dong
Photocatalysis technology is a promising green route to eliminate antibiotic residues, but current performance still cannot satisfy the practicality. Herein, an EDTA-2Na mediated supramolecular self-assembly strategy was employed to modulate the morphology and microstructure of graphitic carbon nitride (GCN). The obtained EDTA-2Na mediated supermolecule-based GCN (ESGCN) was proved to possess ultrathin flake-like morphology with developed porous structure and Na/O dopants to enhance visible light harvesting. Compared to the pristine GCN and the supermolecule-based GCN (SGCN) without the EDTA-2Na mediation, the ESGCN has more photogenerated charges, decreased charge recombination and accelerated transport/transfer rate, which thus greatly improved photocatalytic activity for degrading tetracycline hydrochloride (TC) and the apparent rate constant is 37.3 and 6.0 times higher than those of the GCN and the SGCN. Additionally, it exhibits excellent universality in degrading various tetracycline antibiotics with a wide pH range and good stability/durability. A possible mechanism of photocatalytic degradation of TC by the ESGCN was elaborated. And the toxicity assessments and mung bean germination experiments also indicate the photocatalytic process can effectively decrease the toxicity and the potential risk of TC to the environment. This work provides a feasible and effective approach to enhance photocatalytic activity of graphitic carbon nitride, which has prominent potentials for elimination of antibiotic residues in environment.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMOSPHERE
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2021
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IF 7.086
Yinghua Chi,Wei Wang,Qingzhu Zhang,Haiyan Yu,Meina Liu,Shouqing Ni,Baoyu Gao,Shiping Xu
Suffered from rapid recombination of electrons and holes, apparent photocatalytic activity (APA) of all photocatalysts can never achieve their theoretical ultimate values. But the upper limit of practical APA is of great significance to evaluate the practical application potential of a photocatalyst. Thus, in this work, the concept of ultimate apparent photocatalytic activity (UAPA) was firstly proposed and a convenient evaluation method was first established based on the nature that EDTA-2Na can exclusively scavenge photo-excited holes, and methyl orange (MO) is mainly attacked by superoxide radical ( O 2 − ) which is produced instantly by photo-excited electrons. From a macro perspective, six popular photocatalysts were designedly selected to verify the feasibility and application scope of the proposed UAPA evaluation method. Moreover, O 2 − production rate and photocurrent intensity were measured by spectroscopy and spectrum analyses, and theoretical carrier concentrations were calculated by density functional theory (DFT) to further confirm the rationality and reliability of the proposed method. Positive responses of all the tests guarantee that the proposed UAPA could precisely evaluate the application potential of a photocatalyst and rank the photocatalysts according to their practical potential.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2018
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IF 5.123
Jiafang Piao,Qian Zhao,Dianming Zhou,Weipan Peng,Weichen Gao,Minghui Chen,Guiming Shu,Xiaoqun Gong,Jin Chang
MicroRNAs (miRNAs) were reported to be potential tumor markers for early diagnosis of cancer. Due to its short sequence, low expression level and high susceptibility to degradation, the stable and sensitive detection method of miRNAs is arduous to establish. In this work, we designed a metal chelator (ethylenediamine tetraacetic acid disodium salt, EDTA•2Na) labeled oligonucleotides as the plasmonic signal supraregulator probe to control the generation of gold nanoparticles (AuNPs). Based on another complementary oligonucleotides of target miRNA labeling SiO 2 microparticles (SiO 2 MPs) as the detecting platform, EDTA•2Na labeled oligonucleotide probes were immobilized on the SiO 2 platform through the sandwich structure in the presence of target miRNA. The sandwich chelating device could further chelate Au 3+ to regulate the generation of AuNPs, resulting in colorimetric signal to qualitatively and quantitatively detect the concentration of microRNA-21 (miR-21). The results indicate that the proposed metal chelator -labeled signal amplification method has outstanding sensitivity (LOD = 8.9 fM) and excellent stability, which will be benefit for the early accurate diagnosis of miRNAs.
研究领域:
生物化学
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纳米技术
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癌症研究
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分子生物学
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产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2022
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IF 5.876
En-Hui Yuan,Meng Li,Ming-Hui Yang,Xiaosheng Huang,Kun Zhang,Weiliang Han,Zhicheng Tang,Zhong-Wen Liu
A direct hydrothermal synthesis strategy is developed to prepare the Cu–Fe-ZSM-5 zeolites by using the ethylenediaminetetraacetic acid disodium dihydrate (EDTA-2Na·2H 2 O) chelated Cu 2+ and Fe 3+ precursors as metal sources. During the crystallization, the metal chelates were spontaneously embedded into the ZSM-5 crystals and subsequently transformed to the zeolites encapsulated copper and iron species after removing the chelating agent via the high-temperature calcination . Rigorous characterizations indicate that the resulted Cu 2+ /Cu + and Fe 3+ /Fe 2+ species are formed ultra-small nano-composites with an average diameter of ∼2.2 nm and highly dispersed in the ZSM-5 zeolite crystals. The acidity of the ZSM-5 zeolites is subtly modulated by the encapsulated Cu–Fe nano-composite. As expected, the as-prepared Cu–Fe-ZSM-5 exhibits outstanding catalytic performance for the selective catalytic reduction of NO x with ammonia (NH 3 -SCR) in the broad reaction temperature ranges of 220–480 °C, which is much better than the Cu–Fe/ZSM-5 prepared with the conventional wetness impregnation method. Furthermore, the resultant zeolites show high stability and good tolerance to H 2 O and SO 2 , and it is very competitive for practical application to eliminate NO x . The developed one-pot hydrothermal synthesis route by using EDTA-2Na·2H 2 O as chelating agent is very convenient and easily reproducible, providing a general guideline to design and fabricate the superior transition metal modified zeolite catalysts for NH 3 -SCR and the related reactions.
研究领域:
催化
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环境科学
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材料科学
✓ 已验证
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Bin Li,Biao Ma,Mengying Wei,Yang Li,Xiaobin Fan,Fengbao Zhang,Guoliang Zhang,Qing Xia,Wenchao Peng
Recycle of the spent lithium-ion batteries (LIBs) can reuse the toxic heavy metals for the synthesis of useful materials. In this study, the cobalt metal is obtained by recycling the cathodes of spent LIBs, which is then used as cobalt source for the synthesis of highly porous Co-NC composites. Attributing to the addition of EDTA-2Na and NaNO 3 as chelate agent and activation agent respectively, very large surface areas (>3700 m 2 /g) and highly porous structure can be achieved. These composites can activate peroxymonosulfate (PMS) effectively for the degradation of bisphenol A (BPA) in aqueous solution. The optimized Co-NC/PMS system also shows good performance in a wide pH range and great tolerance to different inorganic ions and NOMs. Radical scavenging experiments and EPR results prove that 1 O 2 is the only functional reactive oxidation species (ROS) for BPA degradation. A generation route of PMS – *OH – *O – 1 O 2 for 1 O 2 is also simulated and proved by DFT calculation. This work provides a novel way to synthesize effective catalysts for PMS activation from the environmental wastes.
研究领域:
环境科学
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材料科学
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催化
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废物管理
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Chemical Engineering Journal Advances
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2021
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IF 0
Weifeng Chen,Guo Lv,Xiang Liu,Jiaying Yan,Qichun Zhang,Dong-Sheng Li
Although a few “on–off” approaches such as the pH-adjusting, temperature-adjusting, and controlling by light upon photo-catalysts have been reported, the “on–off” control of the on-broad and on-demand hydrogen production still faces many challenges. Herein, we first report the usage of Zn 2+ /EDTA-2Na system as an unprecedented, universal, high-efficient, and reusable “on–off” switch for the on-demand H 2 evolution upon the hydrolysis of ammonia borane, sodium borohydride and dimethyl aminoborane. This “on–off” switch has been demonstrated to be efficient and reusable in various heterogeneous and homogeneous metal catalysts for on-demand H 2 evolution. The detailed characterizations have confirmed that Zn 2+ ions attached and located at the surface of catalyst, covered its active sites on the surface, and turned off the H 2 production. The H 2 generation was switched on by the addition of EDTA-2Na, due to its strong coordination ability with Zn 2+ ions. In addition, the Zn 2+ /EDTA-2Na switch has been successfully reused several times without any activity loss in the “on–off” control of H 2 evolution. This switch is of great importance in the practical application for highly efficient, on-site and on-demand H 2 evolution under ambient conditions.
研究领域:
氢能
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催化
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材料科学
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化学工程
✓ 已验证
DOI
危险品化学品经营许可证（带存储）