Science China-Materials
·
2023
·Vol. 66
·期 5
·1779-1792
·
IF 8.1
Yang Jia,Wang Mengxiao,Chen Tao,Yu Xiang,Qin Gang,Fang Xiaohan,Su Xiaoxiang,Chen Qiang
Supercapacitors exhibiting toughness, self-healing, and high specific capacitance have practical significance for use in flexible and wearable electronic equipment. To meet these requirements, a novel multifunctional gel polymer electrolyte (GPE) consisting of polyvinyl alcohol (PVA)-sodium alginate (SA)-K 3 [Fe(CN)] 6 -Na 2 SO 4 was prepared. In this GPE, K 3 [Fe(CN)] 6 plays three crucial roles by serving as a carrier donor, ionic crosslinking agent and redox-active mediator. Consequently, the usual conflict between the conductivity and mechanical properties of GPEs is alleviated to some extent. In addition, the electrode specific capacitance and the energy density of the assembled supercapacitor are obviously improved because of the pseudocapacitance generated from the redox reaction of K 3 [Fe(CN)] 6 . Based on this GPE, the supercapacitor exhibits outstanding bending and stretching stabilities, significant self-healing, and anti-freezing properties. Therefore, the prepared GPE and supercapacitor are promising for application in flexible and wearable electronic equipment with complex service conditions.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 4
·e202404857
·
IF 2
Wei Jiang,Chenkang Zhao,Yanfeng Liu,Yu Zu,Hongyu Guo,Guanghui Zhao,Weizhong Wang,Yong Sun
Graphical In this study, a straightforward coprecipitation method was employed to synthesize the bimetallic catalyst MnO@Co-CN, which demonstrates high efficiency in catalyzing the direct oxidative esterification of HMF to produce FDMC with a yield reaching 90.3%. The synergistic interactions between the dual metals during the reaction significantly enhance the catalytic performance for optimal oxidative esterification. As a versatile platform molecule derived from biomass, 5-hydroxymethylfurfural (HMF) has the potential to be transformed into a variety of chemicals. Of these, furan-2,5-dimethylcarboxylate (FDMC) stands out as an excellent precursor for the synthesis of poly(ethylene furandicarboxylate) (PEF), a polymer with broad applications in the production of various polymeric materials. However, a majority of studies have focused on the use of noble metal catalysts to achieve the direct oxidative esterification of HMF for the production of FDMC. Given the scarcity and high cost of noble metal catalysts, there is a pressing need to develop non-noble metal catalysts to efficiently facilitate the direct oxidative esterification of HMF. Accordingly, a bimetallic catalyst, MnO@Co-CN, was prepared in this paper by a simple coprecipitation method, and a 90.3% FDMC yield was obtained under optimal conditions. The findings revealed that in the oxidative esterification of HMF, MnO x predominantly adsorbs the reactants onto the catalyst surface, whereas CoO x is primarily responsible for the oxidation. The synergistic interaction between Mn and Co enhances the catalytic performance, leading to the superior oxidative esterification outcomes. This work offers a cost-effective, scalable method for FDMC synthesis, highlighting potential for industrial applications.
研究领域:
化学工程
·
催化材料
·
可再生资源转化
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2024
·
IF 5.5
Qingyong Guo,Rongsheng Xiao,Haifeng Chen,Meishuo Bao,Jingwen Qi,Qian-qian Jia,Wuxiang Zhang
Comprehensive Summary Real-time on-site monitoring of resorcinol (RS) concentrations is crucial for detecting hazardous levels, enabling prompt response measures to mitigate potential environmental and health risks. In this study, we developed an innovative method using CoNi@CN-2 nanozymes to activate peroxymonosulfate (PMS) for oxidizing 3,3',5,5'-tetramethylbenzidine (TMB). Our results show that the formation of Ni 2+ through the oxidation of Ni 0 on the CoNi@CN-2 surface significantly enhances the electron-donating capacity of Co 0 . The catalytic reaction of TMB is mediated by redox active species (SO 4 •− , •O 2 − , •OH and 1 O 2 ). RS drives colorimetry by transferring electrons to the benzene ring and specific nitrogen atoms in ox-TMB, reducing ox-TMB to TMB. Furthermore, the colorimetric assay shows a robust linear correlation between RS concentration and absorbance (Abs), described by Abs = –0.44[RS] + 0.886 (0—200 μmol/L, R 2 = 0.983). Also, we introduce a novel smartphone-integrated autonomous detection software that can analyze RS concentration and grayscale values (GSV), yielding GSV = 0.327[RS] + 63.601 (0—200 μmol/L, R 2 = 0.990) with a detection limit of 5.29 μmol/L. Additionally, excess PMS leads to ROS attacking specific sites in ox-TMB, forming secondary oxidation products. This study has enabled rapid and accurate detection of RS, making a significant contribution to environmental safety and protection.
研究领域:
环境科学
·
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 5
·1-9
·
IF 2.8
Zhang Xiaochen,Zhang Zijian,Zhang Xueqi,Sun Haiquan,Hu Quan,Wang Haibao
Shuttle-like vanadium selenide was prepared via carbonizing the vanadium-based metal organic frameworks for supercapacitors. Its morphology and structure were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and N 2 adsorption–desorption isotherm. Its electrochemical performance was investigated by cyclic voltammetry and galvanostatic charge–discharge test in three electrode configurations for supercapacitor. Compared with those in pure KOH electrolyte, the supercapacitive performances can be greatly enhanced when adding a certain amount of K 3 Fe(CN) 6 in KOH. A high specific capacitance of 512 F g −1 can be achieved at a scan rate of 0.2 mV −1 in 1 M KOH + 0.02 M K 3 Fe(CN) 6 , while only 164 F g −1 can be obtained in pure 1 KOH electrolyte. Furthermore, the VSe 2 also exhibits stable long-term cycling, 84.7% capacitance retention after 6500 cycles at a current density of 2 A g −1 . Those results provide a facile yet effective method for high performance energy storage devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2020
·
IF 4.006
Hujun Xie,Yutong Zhang,Mengna Cao,Chengzhi Liu,Yuezhong Mao,Gerui Ren,Zunyi Wu,Sheng Fang,Shiyi Tian,Di Wu
High stability nanoemulsions emulsified by combination of tripolyglycerol monostearate (PGFE) and casein (CN) were fabricated for loading functional components of peppermint oil and β-carotene, and the physicochemical properties, storage stability and sensory characteristics were explored. The β-carotene-loaded peppermint oil nanoemulsions exhibited fine physical stability when the mass ratio of PGFE/CN was less than 0.5. The β-carotene nanoemulsions were pseudoplastic fluid since the flow behavior index was lower than 1, based on the Herschel-Bulkley model. Intelligent sensory analyses clarified that electronic sensory evaluation methods, including colorimeter, electronic nose and electronic tongue, are convenient and effective to distinguish various nanoemulsions with different ratios of mixing emulsifiers. The formation mechanism of nanoemulsions was further explored to reveal the important role of hydrogen bonding and electrostatic interactions to yield nanoemulsions.
研究领域:
食品科学
·
化学工程
·
生物物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Yan Yuan,Junxiang Wang,Zongqian Hu,Haiping Lei,Donghua Tian,Shuqiang Jiao
A Prussian blue analogue, Na 2 Co 3 [Fe(CN) 6 ] 2 , has been fabricated by a facile co-precipitation method at room temperature as a potential cathode material for both lithium-ion and sodium-ion batteries. It found that the Na 2 Co 3 [Fe(CN) 6 ] 2 nanoparticles with a primary particle size of 30–40 nm have been synthesized, and exhibited an excellent electrochemical performance , including a long cycling behavior in lithium-ion batteries and a good rate performance in sodium-ion batteries. In lithium-ion batteries, the Na 2 Co 3 [Fe(CN) 6 ] 2 nanoparticles cathode can deliver an excellent cyclic performance with 73.0% retention of initial capacity after 50 cycles at 50 mA g −1 . Moreover, when Na 2 Co 3 [Fe(CN) 6 ] 2 is used as cathode material of sodium-ion batteries, it exhibits an outstanding rate performance exceeding 75.2% retention of initial capacity after 50 cycles at 200 mA g −1 . Therefore, the Na 2 Co 3 [Fe(CN) 6 ] 2 nanoparticles can be a potential cathode candidate for the application of lithium-ion and sodium-ion batteries due to its excellent electrochemical performance, easy preparation, low cost and environment benefits.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米材料
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Heng Fei,Junxia Shao,Hua Li,Najun Li,Dongyun Chen,Qingfeng Xu,Jinghui He,Jianmei Lu
g-C 3 N 4 (CN), which shows enormous potential for photocatalysis, has long been studied, but still exhibits an unsatisfactory degradation rate. Herein, dual cocatalysts, Br and ultrafine RhO x nanoparticles, were constructed on ultrathin CN for synergetic photocatalysis. Ultrathin CN increased the exciton separation efficiency, while cocatalysts Br and RhO x can accelerated electron and hole transfer simultaneously, maximizing the photocatalytic degradation performance of CN. This CN-Br 0.12 /2%RhO x degraded 10 ppm bisphenol A (BPA) in 9 min, which represents the fastest degradation rate reported to date. This excellent performance was also demonstrated by a larger photocurrent response, higher separation efficiency, and faster transfer rate for electron–hole pairs than CN. This work obtained an enhanced electron–hole separation efficiency and migration rate by combing ultrathin CN with dual-channel cocatalysts, leading to the best photocatalytic degradation performance reported for CN.
研究领域:
材料科学
·
环境化学
·
光催化
✓ 已验证
DOI
高影响因子
IONICS
·
2025
·
IF 2.6
Wang Yao,Wu Yidi,Zhang Pengzhan,Xu Bing,Wang Kangkang,Zhang Liang,He Zhixian,Zhang Shengnan
The novel MnO x /CN/Ag composite was prepared by the precipitation method. The structure and morphology of the material were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Light absorption capacity, charge transfer efficiency, and carrier recombination ability were evaluated using UV–Vis diffuse reflectance (UV–Vis DRS) spectroscopy, electrochemical impedance spectroscopy (EIS), photoluminescence (PL) spectroscopy, and transient photocurrent response (TPR). The photothermal catalytic performance toward toluene and tetracycline hydrochloride (TC) was assessed, and the reduction properties were analyzed by H 2 -temperature programmed reduction (H 2 -TPR). The results show that the MnO x /CN/Ag composite achieves a degradation efficiency of 97% for toluene at 260℃ and a TC degradation efficiency of nearly 80%. No obvious attenuation was observed after 360 min of continuous reaction. The superior catalytic performance and stability of the composite can be attributed to the abundant oxygen vacancies and low reduction temperature. This work not only provides a novel photothermal catalytic material for enhancing VOC degradation but also offers insights into the treatment of multiple environmental pollutants. Graphical abstract
研究领域:
环境科学
·
材料科学
·
催化
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Pengfei Zhu,Xiaolong Wu,Xingyang Xiao,Ming Duan,Dan Luo,Jinru Lin
In this work, Bi 12 O 17 Cl 2 and ZIF-8 were synthesized via a facile in-situ precipitation method, while ZnO-CN was obtained through the pyrolysis of ZIF-8. Then, a novel Bi 12 O 17 Cl 2 /ZnO-CN composite catalyst with Z-scheme heterojunction was prepared by mechanical mixing-low temperature activation method. When the ZnO-CN is pyrolyzed at 550 ℃ and accounts for 10 wt% in the Bi 12 O 17 Cl 2 /ZnO-CN composite, the composite exhibited a significantly higher degradation rate for levofloxacin hydrochloride (LVX) (94.50%) compared to Bi 12 O 17 Cl 2 (67.30%) and ZnO-CN (36.80%), while also achieving a high removal rate of Cr(VI) under acidic conditions (92.00%). And the toxicity of LVX to wheat decreased significantly after photocatalytic degradation. Meanwhile, the Bi 12 O 17 Cl 2 /ZnO-CN has good universality, salt resistance and reuse stability. The experimental results of sample characterization show that the improved photocatalytic performance of Bi 12 O 17 Cl 2 /ZnO-CN composite can be attributed to the high-efficiency separation of electron-hole pairs (e - -h + ), enhanced light absorption in the visible region, increased specific surface area and active sites. Both the free radical capture experiment and electron paramagnetic resonance (EPR) test indicate that •O 2 - and h + are the primary active species in the process of degrading LVX by Bi 12 O 17 Cl 2 /ZnO-CN. Combined with mechanism exploration experiment and iquid chromatography-mass spectrometry (LC-MS) analysis, a possible direct Z-scheme heterojunction electron transfer mechanism and photocatalytic degradation pathways for LVX was proposed. This work enhances the photocatalytic performance of Bi 12 O 17 Cl 2 and provides an idea for antibiotic or Cr(VI) wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
·
2023
·Vol. 59
·期 1
·92-103
·
IF 1.2
Yang Hu,Liu Qingcui,Ren Haoyi,Liang Wenju,Shao Peiyuan,Deng Jianglian,Yu Feng,Liu Zhiyong,Peng Banghua
The development of multifunctional electrocatalytic materials for energy storage, conversion and electrochemical sensing with the characteristics of low cost, high catalytic activity, and high stability has far-reaching significance. In recent years, Schiff base complexes have become the preferred materials for electrochemical research interests because of their special structure and the multiple active sites on the surface. However, there are few studies on Schiff base catalysts for the multifunctional application, especially in electrochemical detection. In this paper, cobalt Schiff base complex was synthesized by solution precipitation method and then was phosphorized to obtain the multifunctional catalyst denoted as CoPO–CN. The electrocatalytic activity was measured in the presence and absence of urea alkaline solution, and the results showed that the onset potential for urea oxidation reaction (UOR) and oxygen evolution reaction (OER) were 1.35 and 1.52 V versus reversible hydrogen electrode (vs. RHE), respectively. The electrochemical sensing performance for ascorbic acid (AA) indicated that the detection sensitivity was 217.2 μA mM –1 cm –2 , and the detection limit was 3.84 μM. Our work creatively used the phosphorized cobalt Schiff base for multifunctional application, not only providing new insights for the multifunctional application of Schiff base catalyst in energy conversion, but also pointing a new method for detecting small biomolecules, especially ascorbic acid.
研究领域:
电催化
·
能量转换与存储
·
电化学传感器
·
材料化学
·
无机化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Qi Chen,Weirui Chen,Jing Wang,Gaozu Liao,Xukai Li,Xingmei Guo,Laisheng Li
Small molecular carboxylic acids (SCAs) are common in natural waters, but their impact on advanced oxidation processes (AOPs) is understudied. This study investigates the effects of various carboxylic acids, such as oxalic acid (OA), formic acid (FA), acetic acid (AA), succinic acid (SA), and benzoic acid (BA), on a Ce single-atom-doped graphitic carbon nitride (Ce–CN) photocatalytic ozonation (PCO) system. Among the tested SCAs, only OA significantly promoted O3 activation and pollutant degradation. When degrading atrazine (ATZ), Ce–CN performed worse than CN, but Ce–CN exhibited superior activity when OA was the target. The OA removal was 98% in the PCO/Ce–CN system, while it was 82% in the PCO/CN system in 30 min. The introduction of OA also enhanced ATZ removal from 55 to 86% within 5 min in the PCO/Ce–CN system. Moreover, OA’s yield during macromolecular organic compound degradation and its proportion among SACs affected PCO/Ce–CN activity. Mechanistic studies showed that OA could bind with Ce–CN, forming a Ce–OA complex that facilitated ligand-to-metal electron transfer (LMET), reducing the redox potential of the Ce(III)/Ce(IV) cycle, enhancing the ATZ removal efficiency, and boosting ozone activation. O3 decomposed into *O and •OH on Ce–CN, which were the primary reactive oxygen species for pollutant degradation. These findings highlighted the unique role of OA in Ce-based PCO systems, offering insights for enhancing AOP performance.
研究领域:
环境科学
·
水处理
·
催化
·
光化学
·
臭氧化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Catalysis
·
2024
·
IF 11.3
Jiayu An,Wenjun Jiang,Fuwei Zhuang,Yinhua Ma,Su Zhan,Feng Zhou
Utilizing photocatalytic technology to achieve efficient production of H2O2 is a hot topic. Here, we synthesized a photocatalytic material with a strong built-in electric field, namely, Pym-CN, through a hydrothermal-assisted thermal polymerization strategy, which effectively promotes the separation and transfer of photoinduced charge carriers. A pyrimidine ring was successfully introduced into the heptazine structure unit of Pym-CN, which leads to electron aggregation at N═C–N, benefiting for enhancing the strong sorption and activation capabilities of oxygen. Under the condition of visible light wavelength greater than 400 nm (λ > 400 nm), the H2O2 production rate of Pym-CN (2622.5 μmol/L/h) is 7.6 times that of the BCN. A detailed investigation of the reaction mechanism revealed that Pym-CN follows a two-step continuous process of single-electron oxygen reduction reaction (ORR). This work elucidates the application prospects of the donor–acceptor (D–A) structure with a strong built-in electric field in the field of efficient photocatalytic production of H2O2.
研究领域:
材料科学
·
光催化
·
可再生能源
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）