JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2024
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IF 4.1
Ziyi Guo,Cuizhu Ye,Yi Shen
Nitrate reduction reaction (NO 3 - RR), an emerging technology for clean and efficient nitrate removal, is of great significance to reduce water pollution. In this study, NO 3 - RR activity was assessed on the copper foils, and the effects of various variables including initial pHs, temperatures, and nitrate concentrations on the NO 3 - RR were investigated. The copper foils displayed excellent NO 3 - RR activity with a high ammonium selectivity of 45% at pH = 1 and a conversion rate of 55% at pH = 13. The conversion of nitrate to nitrite was the rate determining step at pH = 7 and pH = 13. Oxalic ions displayed significant inhibition effects on NO 3 - RR by copper foils in the acidic and alkaline electrolytes. In particular, the inhibition effect of oxalate ions on NO 3 - RR approached to 50% with a nitrate/oxalate ratio of 2:1 in acidic media, which is likely attributed to the formation of complexes between oxalate ions and the copper surface. Such an inhibition effect is not noted in the neutral electrolyte. Structural characterizations including atomic force microscopy, Raman spectroscopy and Fourier transform infrared spectroscopy elucidated that the oxalate ions occupied a large number of the copper sites on the surface of copper foil to form competitive adsorption with nitrate. The experimental parameters for NO 3 - RR by copper foils were comprehensively analyzed, affording new insights on the complex interactions between the copper, nitrate, and oxalate.
研究领域:
环境科学
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电化学
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产品关联
DOI
高影响因子
RSC Advances
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2015
·Vol. 5
·期 78
·63650-63654
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IF 3.84
Qiyi Lu,Juanjuan Zhang,Yuanya Wu,Shihong Chen
In this work, the anodic electrochemiluminescence (ECL) behavior of water-soluble poly(9,9-dioctylfluorenyl-2,7-diyl) (PFO), is firstly studied with Na2C2O4 as a coreactant using cyclic voltammetry and ECL measurements. The possible anodic ECL mechanism of PFO–C2O42− system is proposed. Based on the fact that the melamine could efficiently quench the ECL signal of the PFO–C2O42− system, a new ECL sensing method for melamine was developed with a wide linear range from 9.0 × 10−11 to 1.1 × 10−8 M. Furthermore, the sensor exhibited high sensitivity and good stability. Due to the excellent ECL behavior, the PFO–C2O42− system could be a promising platform for constructing ECL sensors.
研究领域:
分析化学
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环境科学
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食品科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2016
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IF 2.265
Mengmeng Zuo,Mingdong Zhou,Dianwen Hu,Fan Gao,Sijie Dong,Liangliang Huang
A new inorganic–organic hybrid indium phosphite-oxalate, formulated as H[In 5 (HPO 3 ) 6 (H 2 PO 3 ) 2 (C 2 O 4 ) 2 ]·(C 4 N 2 H 11 ) 2 ·H 2 O 1 has been hydrothermally synthesized in the presence of piperazine acting as a structure directing agent (SDA). The single crystal X-ray diffraction reveals that compound 1 shows three-dimensional open-framework with intersecting 12-ring channels along the [010] and [001] directions, which is constructed from strictly alternating double 6-ring units (D6Rs), [C 2 O 4 ] 2− groups and [H 2 PO 3 ] − pseudo-pyramids. It is noted that the classical D6R SBU is firstly reported in main metal phosphite/phosphite-oxalate. By regarding D6R as the 6-connected nodes, the inorganic–organic hybrid framework is based on a pcu-type topology. The as-synthesized product was characterized by single-crystal X-ray diffraction, powder X-ray diffraction, IR spectroscopy , thermogravimetric analysis (TGA), ICP-AES and elemental analyses.
研究领域:
材料化学
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晶体学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Xiaoyan Wang,Zixiao Li,Shengjun Sun,Hang Sun,Chaoxin Yang,Zhengwei Cai,Hui Zhang,Meng Yue,Min Zhang,Hefeng Wang,Yongchao Yao,Qian Liu,Luming Li,Wei Chu,Jianming Hu,Xuping Sun,Bo Tang
Seawater electrolysis is gaining recognition as a promising method for hydrogen production. However, severe anode corrosion caused by the high concentration of chloride ions (Cl – ) poses a challenge for the long-term oxygen evolution reaction. Herein, an anti-corrosion strategy of oxalate anions intercalation in NiFe layered double hydroxide on nickel foam (NiFe-C 2 O 4 2– LDH/NF) is proposed. The intercalation of these highly negatively charged C 2 O 4 2– serves to establish electrostatic repulsion and impede Cl – adsorption. In alkaline seawater, NiFe-C 2 O 4 2– LDH/NF requires an overpotential of 337 mV to gain the large current density of 1000 mA cm −2 and operates continuously for 500 h. The intercalation of C 2 O 4 2– is demonstrated to significantly boost the activity and stability of NiFe LDH-based materials during alkaline seawater oxidation.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Le Ma,Xiansheng Li,Xuehan Chen,Jingyu Li,Pengfei Liu,Changting Wei,Qingshan Ma,Leimeng Xu,Wenhua Zhang,Jizhong Song
Mixed halide CsPb(Br/Cl) 3 quantum dots (QDs) exhibit fine tunable blue light and narrow photoluminescence (PL) full-width at half-maximum (FWHM), which has attracted significant attention as a promising candidate to realize a new generation of blue light technology. However, the introduction of Cl − makes it very easy to be eroded by water in the environment, which will lead to deep-level defects and degrade the luminescence and stability of QDs. Here, we propose to introduce tetra- n -octylammonium oxalate (TOAOxa) to improve the water-resistance stability and exciton recombination of CsPb(Br/Cl) 3 QDs and QD-based light-emitting diodes (QLEDs). The oxalate ion (Oxa 2− ) of TOAOxa could form strong interaction with undercoordinated Pb 2+ on CsPb(Br/Cl) 3 QD surface, which was confirmed by FTIR and XPS analysis. Oxa 2− passivated QDs (Oxa-QDs) exhibited improved photoluminescence quantum yield (PLQY) and enhanced water-resistance stability compared to pristine QDs. For example, after soaking in water–acetone co-solvent for 1 h, Oxa-QDs can maintain the initial cubic morphology and 43.9% of initial PL intensity, while the morphology and luminescence of pristine QDs are almost damaged. Based on the above concept, the Oxa-QD-based QLED presented a maximum external quantum efficiency (EQE) of 4.0%, and operational lifetime (T 50 ) of 84 s, which was a 5-fold enhancement in EQE, and 7-fold enhancement in stability compared to pristine QLED, respectively. Besides, the Oxa-QD-based QLED exhibits better stability in high-humidity air. To sum up, the Oxa 2− passivation strategy has significantly improved the efficiency and water-resistant stability of QDs and devices and would rapidly promote the development of blue-emitting QDs.
研究领域:
材料科学
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光电技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
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IF 9.8
Qianqian Zhang,Yaru Zhu,Min Yang,Yanru Zhang,Jialin Wang,Shanshan Liu,Ye Liu,Xin Yang,Kai Feng,Wenzuo Li
Aqueous zinc-ion batteries (AZIBs) have good application prospects in the field of large-scale energy storage. The design and synthesis of high-performance cathode materials are key to promoting the development and application of AZIBs. In this work, the combination of redox active V 4+ cation and HPO 3 2− anion provides excellent zinc-ion (de)intercalation ability. In addition, HPO 3 2− and C 2 O 4 2− anion groups collaborate to construct a stable framework with multi-dimensional zinc-ion transport channels, providing fast and robust pathway for zinc-ion transport. Carbon composites further improve electronic conductivity, shorten ion transport distance, and increase the electrochemical reaction area of Na 2 [(VO) 2 (HPO 3 ) 2 (C 2 O 4 )]·2H 2 O@C (NVPCO@C) cathode material. As a result, NVPCO@C cathode material delivers a high specific capacity over 180 mAh·g −1 at a current density of 40 mA·g −1 . Moreover, NVPCO@30%C cathode material maintains 100 % capacity after 100 cycles. Ex-situ X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectra confirm the electrochemical activity of V 4+ /HPO 3 2− ions and reveal the zinc-ion storage mechanism.
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DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2023
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IF 9.1
Zhenqiang Guo,Huicong Yang,Qian Wei,Shengjun Xu,Guangjian Hu,Shuo Bai,Feng Li
ABSTRACT Sulfurized polyacrylonitrile (SPAN) is proposed as a promising cathode material for lithium sulfur batteries. However, the continuous side reactions at the electrolyte-electrode interfaces as well as the slow redox kinetics of SPAN cathode deteriorate the electrochemical performance. In this study, an electrolyte with dual-additives comprising 2-fluoropyridine (2-FP) and lithium difluorobis (oxalato) phosphate (LiDFBOP) was used to improve the performance of Li||SPAN cells. 2-FP has a lower lowest occupied molecular orbital energy than that of the solvents in the electrolyte, leading to its prior reduction. A LiF-rich film can be formed on the electrode, effectively improving the stability of the electrolyte-electrode interfaces and prolonging the life. Simultaneously, LiDFBOP could form an electrolyte-electrode interface film containing a large amount of Li x PO y F z species, compensating for the kinetic deterioration caused by the lower ionic conductive of LiF formed at the electrolyte-electrode interface. Hence, an electrode-interface film with good chemical stability and high Li + transport was established by LiF and Li x PO y F z -rich species. The Li||SPAN cell with the electrolyte containing dual-additives demonstrates an excellent capacity retention of 97.5% after 200 cycles at 1.0 C, 25 °C, comparing to 56.2% capacity retention without additives. Moreover, the rate capacities of cells with dual-additives can reach 1128.1 mAh/g at 5 C, comparing to only 813.5 mAh/g using electrolyte without additives. Our results shown that the dual-additives in electrolyte provide a promising strategy for practical application of lithium sulfur batteries with SPAN cathodes.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2023
·
IF 4.2
Juan Yang,Dongmiao Qin,Na Wang,Yusheng Wu,Kanjun Fang,Biyang Deng
The construction of advanced systems capable of accurately detecting neuron-specific enolase (NSE) is essential for rapidly diagnosing small-cell lung cancer. In this study, an electrochemiluminescence (ECL) resonance energy transfer immunosensor was proposed for the ultra-sensitive detection of NSE. The co-reactants C2O42− and Ru(bpy)32+ were integrated to form a self-enhanced ECL luminophore (Ru-ZnMOF) as the ECL donor. The abundant carboxyl functional groups of Ru-ZnMOF supported antibody 1 via an amidation reaction. Polydopamine-modified zinc dioxide nanoflowers, as ECL acceptors, inhibited Ru-ZnMOF ECL signaling. The linear range of NSE was 10 fg/mL to 100 ng/mL with a detection limit of 3.3 fg/mL (S/N = 3), which is suitably low for determining NSE in real samples.
研究领域:
分析化学
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生物医学工程
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癌症诊断
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纳米技术
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）