JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 12
·124516
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IF 4.316
Yongfang Zhou,Yi Shen,Hongying Li
The presence of metallic impurities in the electrolyte greatly affects electrocatalytic performance. A systematic study on this topic can not only provide guidance for rigorous practices on electrochemical measurements, but also in-depth fundamental understanding on the mechanisms of the electrochemical reactions. Herein, nine types of metallic ions including Cu2+, Ni2+, Fe3+, Fe2+, Co2+, Mn2+, Zn2+, Ce3+ and Al3+ are intentionally introduced into the electrolytes with a controlled manner and their effects on electro-oxidation of water, 5-hydroxymethylfurfural (HMF) and glycerol are investigated in details. Among these metal ions, Co2+ has the most pronounced effects on H2O electro-oxidation while Cu2+ species displays superior activity toward HMF and glycerol electro-oxidation, but negligible effects on H2O electro-oxidation. Such a unique feature of Cu2+ can also be noted from electro-oxidation of other small molecules, such as ethylene glycol, ethanol and furfural. More importantly, the effects of metallic impurities are independent of the composition of the electrodes, only rely on the pH of the electrolytes. In-situ electrochemical Raman spectroscopy, control electrochemical experiments and X-ray photoelectron spectroscopy analyses reveal that the origin of impurity effects is attributed to the formation of hydroxides during the electrochemical measurements.
研究领域:
电化学
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材料科学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 8
·5638-5648
·
IF 9.5
Geng Gao,Jian Tang,Shaoze Zhang,Bo Jin,Yajie Yuan,Yixing Zeng,Yanqiu Xu,Qing Zhao,Keyu Zhang,Junxian Hu,Yin Li,Yaochun Yao
Iron oxalate, a coordination polymer known for its sustainability, is a potential candidate for high-capacity and high-rate anode materials for lithium-ion batteries. However, the inherent crystal water in iron oxalate significantly hampers its electrochemical activity, leading to a reduced lithium storage capability. Therefore, the removal of crystal water is essential for electrochemical performance enhancement. Here, we harnessed the differing binding strengths of water molecules between chains on various crystal planes of iron oxalate dihydrate, using dihydrate crystal plane regulation strategies to enhance the removal of water molecules. Specifically, by introducing ethanol molecules, which have hydroxyl oxygen characteristics similar to those of water molecules, we modified the surface energy of the original crystal planes resulting in the exposure of (202) crystal planes in iron oxalate dihydrate materials. This crystal plane regulation effectively enhances the release kinetics of crystal water. Furthermore, due to the optimal dehydration capability of the (202) facets and the enhanced capacity of lithium-ion diffusion, the dehydrated FeC2O4-12 h nanorods with exposed (202) facets exhibited an impressive discharge capacity of 850 mA h g−1 at a high rate of 5 A g−1. This work not only proposes a strategy for removing crystal water from electrode materials but also introduces a crystal facet regulation method, offering new avenues for enhancing the electrochemical performance of transition metal oxalate materials in areas such as proton batteries, electrocatalysis, and solid electrolytes for proton conductors.
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
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-5
·
IF 5.228
Ling Yun,Xie Wen Chang,Liu Guo Kun,Yan Run Wen,Wu De Yin,Tang Jing
Inter- and intra- molecular hydrogen bonding plays important role in determining molecular structure, physical and chemical properties, which may be easily ignored for molecules with a non-typical hydrogen bonding structure. We demonstrated in this paper that the hydrogen bonding is responsible for the different Raman spectra in solid and solution states of p-Nitrothiophenol (PNTP). The consistence of the theoretical calculation and experiment reveals that the intermolecular hydrogen bonding yields an octatomic ring structure (8) of PNTP in the solid state, confirmed by the characteristic S-H---O stretching vibration mode at 2550 cm −1 ; when it comes to the solution state, the breakage of hydrogen bond of S-H---O induced the S-H stretching vibration at 2590 cm −1 . Our findings may provide a simple and fast method for identifying the intermolecular hydrogen bonding.
研究领域:
化学
·
光谱学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2017
·
IF 4.536
Samrat Devaramani,Xiaofang Ma,Shouting Zhang,Mahgoub Ibrahim Shinger,Dongdong Qin,Duoliang Shan,Xiaoquan Lu
Axial ligation property of metalloporphyrins has got vital importance in the architecture of donor–acceptor dyads, 3D cages and modular assemblies made up of porphyrins. Nitrogenous ligands have been extensively used in this regard. In this paper, we made a unique attempt to axially ligate thiol-appended molecule to tetraphenylporphyrinato zinc(II), (ZnTPP). Taking the advantage of photoexcitation of metalloporphyrins, axial ligation of 1-dodecanethiol (DDT) to ZnTPP in the presence of visible light was invented. This has been ascertained by recording the charge transfer between ZnTPP and DDT. Photoinduced axial ligation of DDT to ZnTPP under visible light was studied by varying the wavelength and intensity of the light source. The axial ligation reaction was found to be photoswitching and wavelength selective. The binding constant of the ZnTPP–DDT complex was found to be comparable with that of ligands bind to ZnTPP though nitrogen. The consequence of the axial ligation on the HOMO and LUMO and the photoinduced charge transfer kinetics of the planar chromophore, ZnTPP were studied. Scanning electrochemical microscope was used to extract the heterogeneous charge transfer constant values in the case of ZnTPP and ZnTPP–DDT at the film/electrolyte solution.
研究领域:
化学
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光化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 35
·2003357
·
IF 11.459
Simin Feng,Junyang Tan,Shilong Zhao,Shuqing Zhang,Usman Khan,Lei Tang,Xiaolong Zou,Junhao Lin,Hui-Ming Cheng,Bilu Liu
Monolayer transition metal dichalcogenides are 2D materials with many potential applications. Chemical vapor deposition (CVD) is a promising method to synthesize these materials. However, CVD-grown materials generally have poorer quality than mechanically exfoliated ones and contain more defects due to the difficulties in controlling precursors' distribution and concentration during growth where solid precursors are used. Here, thiol is proposed to be used as a liquid precursor for CVD growth of high quality and uniform 2D MoS 2 . Atomic-resolved structure characterizations indicate that the concentration of sulfur vacancies in the MoS 2 grown from thiol is the lowest among all reported CVD samples. Low temperature spectroscopic characterization further reveals the ultrahigh optical quality of the grown MoS 2 . Density functional theory simulations indicate that thiol molecules could interact with sulfur vacancies in MoS 2 and repair these defects during the growth of MoS 2 , resulting in high-quality MoS 2 . This work provides a facile and controllable method for the growth of high-quality 2D materials with ultralow sulfur vacancies and high optical quality, which will benefit their optoelectronic applications.
研究领域:
材料科学
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纳米技术
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 46
·23748-23755
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IF 6.895
Zhaosen Chang,Ying Liang,Shunli Wang,Lu Qiu,Yan Lu,Lijuan Feng,Zhuyin Sui,Qi Chen
Owing to specific formation of five-membered or six-membered cyclic esters between boric acid groups and cis-diol molecules, boric acid bearing fluorescent materials can not only selectively capture but also specifically identify cis-diol substances. In this work, a novel covalent organic framework containing boric acid groups (COF-BA) was prepared through post-modification via the aza-Diels–Alder cycloaddition reaction. COF-BA with good stability, a permanent pore structure, a high specific surface area (606 m2 g−1) and a uniform pore size (2.59 nm) exhibited unique selectivity toward the cis-diol guest molecule 1,2-dihydroxyanthracene-9,10-dione (1,2-Doa) with a high adsorption capacity of 177.95 mg g−1. However, as for the isomers of 1,2-Doa (1,4-dihydroxyanthracene-9,10-dione and 2,6-dihydroxyanthracene-9,10-dione), the corresponding uptake capacities are distinctively decreased to 40.86 mg g−1 and 3.05 mg g−1, respectively. It is worth noting that the COF-BA can be recovered and recycled. Moreover, because the formation of the quinoline enhanced the conjugation effect of the COF skeleton, it was unexpectedly found that COF-BA possessed an intrinsic fluorescence property and could be used as an optical sensor for 1,2-Doa.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jiacheng Dong,Ailan Huang,Tianrun Wu,Yang Chen,Zijun Bie
cis-Diol-containing molecules, an essential type of compounds in living organisms, have attracted intensive research interest from various fields. The analysis of cis-diol-containing molecules is still suffering from some drawbacks, including low abundance and abundant interference. Metal–organic frameworks (MOFs) have proven to be an ideal sorbent for sample preparation. However, most of the reported MOFs are mainly restricted to a microporous regime (pore size <2 nm), which greatly limits the application. Herein, a facile strategy is established to construction of boronate affinity MOFs via the postsynthetic ligand-exchange process. Owing to the fact that the ligand-exchange process was assisted by the structural integrity of the primitive metal–organic framework and the great compatibility of click chemistry, the obtained EPBA-PCN-333(Fe) is able to realize the maximum maintaining the porosity and crystallinity of the parent material. Several intriguing features of EPBA-PCN-333(Fe) (e.g., excellent selectivity, efficient diffusion, good accessibility, and size exclusion effect) are experimentally demonstrated via a series of cis-diol-containing molecules with different molecular sizes (small molecules, glycopeptides, and glycoproteins). The binding performance of EPBA-PCN-333(Fe) is evaluated by employing catechol as the test molecule (binding capacity: 0.25 mmol/g, LOD: 200 ng/mL). Finally, the real-world applications of EPBA-PCN-333(Fe) were demonstrated by the detection of nucleosides of human urine samples.
研究领域:
分析化学
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材料科学
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生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 49
·43648-43655
·
IF 3.289
Juan Ma,Chaozhan Wang,Yinmao Wei
Membrane separation has notably important applications in many fields. Boronate affinity provides a method to specifically recognize cis-diol-containing molecules. However, there is no report on the preparation and application of boronate affinity membranes. In the present study, high-capacity boronate affinity membranes were synthesized by grafting polyethyleneimine (PEI) to regenerated-cellulose (RC) membranes and subsequently coupling 4-formylphenylboronic acid. Detailed physical characterizations using Attenuated Total Reflection Fourier transform infrared (ATR-FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) revealed the success of the synthesis. The morphology of the membranes, which were characterized using an atomic force microscope (AFM), indicates that the membrane became smoother after the polymer was grafted. The boronate affinity membrane had high selectivity and a high adsorption capacity for cis-diol-containing molecules; its saturated adsorption capacity for catechol, salbutamol, dopamine and adenosine was 511, 103, 472 and 120 μmol g−1, respectively, which is much higher than that of most reported particulate or monolithic adsorbents. In addition, the membrane showed notably fast adsorption and desorption equilibration for the cis-diol-containing molecules. It was successfully used to enrich dopamine in urine samples with notably efficient reusability, which indicates its promising application in the pretreatment of real complex samples.
研究领域:
生物化学
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材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 43
·5803-5812
·
IF 3.1
Fenying Wang,Shuqing Xiong,Tingting Wang,Yadan Hou,Qianjin Li
Fluorescent boronate affinity molecules have gained increasing attention in the field of fluorescence sensing and detection due to their selective recognition capability towards cis-diol-containing molecules (cis-diols). However, the conventional fluorescent boronate affinity molecules face a challenge in differentiating the type of cis-diol only by their fluorescence responses. In this study, a simple method was used to discriminate different types of cis-diols, including nucleosides, nucleotides, sugars, and glycoproteins based on the phenylboronic acid-functionalized fluorescent molecules combined with principal component analysis (PCA). Both fluorescent molecules were simply synthesized by the covalent interaction between the amino group in 3-aminophenyl boronic acid and the isothiocyanate group in fluorescein or rhodamine B. In view of their fluorescence-responsive behaviors to these cis-diols directly, it is impossible to differentiate their types even under the optimized experimental conditions. When PCA was employed to treat the fluorescence response data and the quenching constants with their molecular weight, different types of cis-diols can be distinguished successfully. As a result, by integrating the fluorescence response of the boronate affinity probes with PCA, it can greatly improve the specific recognition capability of the boronic acids, providing a simple and direct way to distinguish and identify different types of cis-diols.
研究领域:
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2016
·
IF 4.035
Huihui Li,Ting Cheng,Shuxia Wang,Xinyue Zhu,Haixia Zhang
Boronate affinity materials have been widely used for selective capture of cis-diol-containing molecules, but most do not have sufficient extraction efficiency. We have prepared boronic acid-functionalized attapulgite, and then it was coated with imidazolium-based ionic liquid , 1-dodecyl-3-methylimidazolium bromide (C 12 mimBr), via physical self-assembly process. The extraction efficiency of the material increased dramatically after coated with C 12 mimBr, and its enrichment ratios for nucleosides increased by 9- to 282-fold. Besides, the C 12 mimBr-coated adsorbent did not lose selectivity and was able to capture cis-diols in the presence of a 100-fold excess of interferences. C 12 mimBr-coated material was applied to selective enrichment of nucleosides from human urine. The limits of detection and the limits of quantification were in the range of 0.06–0.46 ng mL −1 and 0.20–1.53 ng mL −1 , respectively. Reproducibility of the method was determined with relative standard deviations≤9.9%. The recoveries of the target nucleosides from spiked human urine were in the range of 87.8–109.6%. In our preception, self-assembly ionic liquid layer can serve as a promising alternative to improve the extraction efficiency of boronate affinity materials.
研究领域:
分析化学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Long Jiao,Fuquan Ma,Xiaotong Wang,Zhimin Li,Zhongai Hu,Qing Yin
Asymmetric supercapacitors (ASCs) need positive and negative electrodes to produce a larger redox peak position difference to achieve a higher energy density. Here, 2,8-quinolinediol (QD) is adopted to modify reduced graphene oxide (rGO) and prepare an organic molecule electrode (OME), in which the Faraday reaction occurs in a more positive potential range. The electrochemical tests show that the optimized OME (QD/rGO-0.75) releases a high special capacitance (371 F g–1 at 5 mV s–1) and exhibits an excellent rate capability (86.8% of the initial value at a scanning rate multiple of nearly 20 times). Meanwhile, an MXene (Ti3C2Tx) with a relatively negative potential is prepared. QD/rGO-0.75 and Ti3C2Tx are, respectively, used as positive and negative electrodes to assemble an ASC. The measurements indicate that the assembled ASC is able to store charge within a wide voltage window of 1.6 V in the 1 M H2SO4 electrolyte and exhibit better energy storage performance. Furthermore, the device delivers an excellent cycling stability (83.5%, over 10,000 cycles). The two series-connected devices can light 37 red light-emitting diodes, indicating their potential application.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Wenting Lan,Changgan Lai,Yasheng Dai,Shijiao Fu,Chenjie Gu,Tao Jiang,Yuning Pan
The early and reliable detection of prostate cancer remains a significant challenge in clinical diagnostics. This study presents a quantitative immunoassay for prostate-specific antigen (PSA) using a surface-enhanced Raman scattering (SERS) substrate comprised of polymer-silver nanocubes (Ag NCs) modified with 4-mercaptobenzoic acid (4MBA). We investigated the impact of thiol-containing internal standards (IS) on the quantitative accuracy of SERS, highlighting the superior stability of 4MBA compared to non-thiol molecules like crystal violet (CV). In contrast to CV, 4MBA exhibited significantly greater stability, with only a 9.3% decrease in characteristic peak intensity after prolonged storage. Furthermore, the quantitative detection of PSA was realized using an IS-mediated sandwich immunostructure. Particularly, the coefficient of determination (R 2 ) for the PSA standard calibration curve demonstrated remarkable enhancement from 0.987 to 0.994, highlighting the advantage of thiol-anchored IS correction strategy. Moreover, the limit of detection (LOD) for PSA was refined to 5.6 × 10 -10 mg/mL after a perfect linear fitting was facilitated using 4MBA-based IS correction, which was superior to standard enzyme-linked immunosorbent assay (ELISA) and comparable SERS techniques. In addition, the specificity of the assay was confirmed by the lack of signal for non-target antigens. These findings demonstrate that the strategic selection of robust IS molecules can significantly enhance the quantitative capabilities of SERS technology, paving the way for its application in clinical diagnostics.
研究领域:
医学诊断
·
纳米技术
·
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）