TALANTA
·
2024
·
IF 5.6
Zhigang Yu,Yangkejia Xiang,Xianda Han,Yi Guang,Fengqin Li
A photo/electrochemical coupling interface of Ru[dcbpy] 3 2+ -AMT/Au (AMT; 5-Amino-1,3,4-thiadiazole-2-thiol) was fabricated using a dehydration condensation sulfhydrating method. For the interface functional properties, a combined dual-signal recording (CDSR) method was applied to characterize the response characteristics, and a scanning electrochemical microscopy-electrochemiluminescence (SECM-ECL) imaging was developed to assess the interface distribution uniformity. The interface biosensing compatibility was validated by constructing a simple DNA sensor. The research results show that the interaction between the two functional parameters follows a synergistic effect mechanism in the coupling conditions and an interference effect mechanism in the detection condition. Under optimized conditions, the saturation dual-signal response values are 156.0 and 86.8 μA, respectively. The statistics and imaging comparison analysis validate good interface distribution uniformity and stability performance. The DNA sensor's dual-signal detection limits to the signal probe (SP) are ∼30 fM and 0.3 pM with linear ranges of 100.0 fM ∼ 1.0 nM and 1.0 pM ∼ 10.0 nM, respectively. The fabricated interface exhibits an effective bi-functional response performance compatible with biosensing. The proposed imaging method has a high technical fit for studying photo/electrochemical coupling interfaces and can also provide a reference for other similar coupling interface analyses.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Meixin Li,Pengfei Yu,Shanshan Li,Mati Ullah Khan,Shun Wang,Jiaqi Tian,Shuang Liu,Ling Kong,Zhiwei Chen
Aflatoxin B 1 (AFB 1 ) and ochratoxin A (OTA) are highly toxic mycotoxins prevalent in food and feed, posing severe threats to human and animal health. This work presents an innovative photoelectrochemical aptamer sensor for the detection of AFB 1 and OTA, leveraging a ternary BiOBr/Bi/BiOI heterojunction and Ag 2 S quantum dot-mediated signal amplification. The BiOBr/Bi/BiOI composite was synthesized via a one-step hydrothermal reduction using l -ascorbic acid (AA), exhibiting a high specific surface area to enhance biorecognition efficiency. In situ-assembled Ag 2 S quantum dots amplified photocurrent responses, while a single aptamer probe enabled specific dual-target recognition. Under optimized conditions, the sensor achieved exceptional sensitivity: linear ranges of 0.001–100 ng·mL −1 for both mycotoxins, with detection limits of 4.34 fg·mL −1 (AFB 1 ) and 13.54 fg·mL −1 (OTA). Validation in complex food matrices confirmed high accuracy and robustness. This platform not only provides a reliable method for mycotoxin monitoring but also establishes a versatile design paradigm for multiplexed detection of food contaminants.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wei Cai,Zhiqiang Liu,Dakai Chen,Gang Chen,Jiali Tang,Rongli Gao,Zhenhua Wang,Xiaoling Deng,Chunlin Fu
NaNbO 3 ceramics, recognized as lead-free dielectric energy storage material, suffer from limited energy storage efficiency due to their substantial remnant polarization, which hinders their practical application. The design and engineering of relaxor ferroelectrics represent a promising strategy for substantially improving their comprehensive energy storage performance. In this study, (1- x )NaNbO 3 - x Bi(Mg 3/4 W 1/4 )O 3 (NN-BMW) relaxor ferroelectric ceramics were fabricated through a conventional solid-state sintering process. A systematic investigation was carried out to evaluate the microstructural characteristics, dielectric behavior, and energy storage performance of the NN-BMW ceramics. Among the ceramic samples, the 0.9NaNbO 3 -0.1Bi(Mg 3/4 W 1/4 )O 3 (0.9NN-0.1BMW) ceramic demonstrated the highest recoverable energy density of 2.03 J/cm 3 and the lower energy storage efficiency under an electric field of 290 kV/cm. To further enhance the energy storage performance of the 0.9NN-0.1BMW ceramic, a cold sintering technique combined with post-annealing was employed. By optimizing the post-annealing temperature, the 0.9NN-0.1BMW ceramic treated at 1000 °C exhibited significantly enhanced recoverable energy density of 2.59 J/cm 3 and energy storage efficiency of 76.5 %, surpassing the sample prepared by conventional sintering at 1150 °C. This work illustrates a low-energy, eco-friendly method of synthesizing NN-based relaxor ferroelectric ceramics with superior comprehensive energy storage performances.
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FUEL
·
2022
·
IF 8.035
Yuzhuo Wang,Yingjie Li,Liguo Yang,Xiaoxu Fan,Leizhe Chu
Co-gasification of biomass and waste plastics is a promising technology for H 2 production. In this work, Ni-CaO-Ca 12 Al 14 O 33 and Ni-CaO-MgO bi-functional materials were prepared from carbide slag for H 2 production in sorption-enhanced steam gasification experiments of cellulose/polyethylene mixtures. The H 2 production and CO 2 capture performances of Ni-CaO-Ca 12 Al 14 O 33 and Ni-CaO-MgO in sorption-enhanced steam gasification of cellulose/polyethylene were studied and compared. Density functional theory calculations, including the density of states, electron differential densities, and adsorption energies were performed to investigate the effect of supports on the stability and reactivity of Ni-CaO-based bifunctional materials at a microscopic level. The results exhibit that polyethene contributes to improving the H 2 production effectiveness of cellulose sorption-enhanced steam gasification, the optimum mass ratio of cellulose to polyethene is 0.5:0.5. The CO 2 capture capacity, H 2 yield, and H 2 concentration using Ni-CaO-Ca 12 Al 14 O 33 can be respectively 2.0, 2.6, and 1.4 times as high as those using Ni-CaO-MgO in the 20th cycle, which indicates the higher cyclic stability and catalytic activity of Ni-CaO-Ca 12 Al 14 O 33 . Density functional theory results also indicate that Ca 12 Al 14 O 33 can better retain the stable structure of Ni-CaO-based materials, which is consistent with the experimental results. Compared with MgO, Ca 12 Al 14 O 33 is a better framework for Ni-CaO-based bifunctional material for H 2 production in the sorption-enhanced steam gasification process.
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Journal of Environmental Sciences
·
2021
·
IF 5.565
Yongjin Li,Yingying Zhang,Jiajing Wang,Youzhun Fan,Taizhong Xiao,Zhaoyi Yin,Tianhui Wang,Jianbei Qiu,Zhiguo Song
For better use of solar energy, the development of efficient broadband photocatalyst has attracted extraordinary attention. In this study, a ternary composite consisting of Sr 2 LaF 7 :Yb 3+ ,Er 3+ upconversion (UC) nanocrystals and Bi nanoparticles loaded BiOBr nanosheets with oxygen vacancies (OVs, SLFBB) was designed and synthesized by multistep solvent-thermal method. Mechanisms of in-situ formation of Bi nanoparticles and OVs in BiOBr/Sr 2 LaF 7 :Yb 3+ ,Er 3+ composites (SFLB) are clarified. The Bi metal and OVs enhanced the light-harvesting capacity in the region of visible-near-infrared (Vis-NIR), and promoted the separation of electron–hole (e − /h + ) pairs. Furthermore, the surface plasmon resonance (SPR) effect of Bi metal can improve the energy transfer from Sr 2 LaF 7 :Yb 3+ ,Er 3+ to BiOBr via nonradiative energy transfer process, resulting in enhancing the light utilization from upconverting NIR into Vis light. Due to the synergistic effects of UC function, SPR and OVs, the SFLBB exhibited obviously enhanced photocatalytic ability for the degradation of BPA with a rate of 8.9 × 10 −3 min −1 , which is about 2.78 times higher than 3.2 × 10 −3 min −1 of BiOBr (BOB) under UV–Vis-NIR light irradiation. This work provides a novel strategy for the project of high-efficiency Bismuth-based broadband photocatalysts, which is helpful to further understand the mechanism of enhanced photocatalysis by UC function and plasmonic effect.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Luwei Peng,Yaofeng Wang,Yongxia Wang,Nengneng Xu,Wenshuang Lou,Peixuan Liu,Dongqing Cai,Haitao Huang,Jinli Qiao
Tuning the geometric and electronic structure of bimetallic electrocatalyst to facilitate a specific reaction pathway and offer more active sites is a promising avenue for enhancing activity and selectivity of electrocatalytic CO 2 reduction reaction (eCO 2 RR). Owing to formation of Bi-Cu interface through the separated growth of Bi and Cu atoms on defective copper foam, the Bi-Cu bimetallic electrode converts CO 2 to formate with an allured Faradaic efficiency (94.37%) and partial current density (27.85 mA cm −2 ) at -0.91 Vversus reversible hydrogen electrode (RHE). Notably, such electrode with tight moss-like structure delivers the excellent durability under 58 h electrolysis, outperforming most of the current Bi-based catalysts. Moreover, we have experimentally shown that KOH is a better electrolyte than KHCO 3 due to the lower solution resistance and more confinement of free CO 2 gas, and the alkaline anion-exchange membrane is more ideal than the cation-exchange membrane counterpart, owing to the enhancement of formate selectivity by suppressing the evolution of H 2 . This study inspires a complete set of concepts for highly converting CO 2 to formate that contains the design of effective electrocatalysts, the role of growth substrate, the effect of different electrolytes and membranes.
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高影响因子
ELECTROANALYSIS
·
2026
·Vol. 38
·期 1
·e70099
·
IF 2.3
Yang Chen,Xuening Wang,Huimin Si,Zhiping Sun,Qianyun Yu,Xihong Song,Ying Liu,Chuanbo Yan,Kai Yu
The increasing heavy metal pollution in marine environments has highlighted the urgent need for rapid, on-site detection methods. In this study, a reduced graphene oxide (rGO) and carboxylated multiwalled carbon nanotube (MWCNTs-COOH)-modified screen-printed electrode (SPE) was coupled with a portable electrochemical workstation for on-site detection of Pb 2+ and Cd 2+ in seawater. The key influencing factors involved in the detection process, such as deposition potential, deposition time, and pH value, have been systematically optimized. The response surface methodology (RSM) was applied to refine the portable electrochemical workstation parameters, including step potential, frequency, and pulse amplitude. The detection capability for heavy metals was significantly enhanced by using square wave stripping voltammetry (SWASV) with in situ Hg-Bi film plating, achieving detection limits of 0.4 μg/L for Pb 2+ and 0.8 μg/L for Cd 2+ . Finally, the portable workstation together with rGO/MWCNTs-COOH/SPE showed recovery rates of 101.33 ± 3.42% ~ 115.85 ± 3.50% for Pb 2+ and 101.32 ± 2.23% ~ 102.00 ± 2.00% for Cd 2+ in real seawater. The results were in good agreement with those obtained by inductively coupled plasma mass spectrometry (ICP-MS), thereby validating the detection accuracy of this platform.
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LWT-FOOD SCIENCE AND TECHNOLOGY
·
2020
·
IF 4.006
Guihong Yao,Xiujuan Wang,Minli Yang,Fengming Chen,Yun Ling,Tong Liu,Shige Xing,Meiyi Yao,Feng Zhang
A novel method for one-pot synthesis of functional oil rich in diacylglycerols (DAGs), phytosterol esters (PEs) and α-linolenic acid (ALA) was developed. Firstly, candida rugosa lipase ( CRL ) and thermomyces lanuginosus lipase ( TLL ) were co-immobilized on polydopamine coated Fe 3 O 4 nanoparticles (PDA@Fe 3 O 4 NPs) via covalent bonds. The prepared co-immobilized bi-lipases ( CRL/TLL -PDA@Fe 3 O 4 ) displayed excellent thermal stability, catalytic activity and reusability in comparison to the free forms. Then a rapid one-pot enzymatic synthesis of functional oil was conducted by using CRL/TLL -PDA@Fe 3 O 4 as the biocatalyst. Three kinds of functional oils were produced with high DAGs, PEs and ALA content (≥30.09%, ≥15.61% and ≥26.45%, respectively) under the optimized conditions (1:3:2 phytosterols/ALA/triglycerides, 20 mg/mL CRL/TLL -PDA@Fe 3 O 4 , 40 °C, 8 h). In comparison to a two-step (sequential/immobilized monolipase) synthesis, a significantly synergistic effects occurred in the co-immobilized bi-lipases system. The results demonstrated the feasibility of the novel strategy and would be helpful for the oils and fats industry.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Yunlei Zhang,Wen Guan,Hongyao Song,Yanan Wei,Pei Jin,Bing Li,Changhao Yan,Jianming Pan,Yongsheng Yan
Chemically functional microporous metal-organic frameworks (MOFs) crystals are attractive for catalysis applications, and recent results show that they can be immobilized on high stability substrates, such as carbon materials. In this work, g-C 3 N 4 supported UiO-66-type MOFs catalysts with only acid, base or acid-base bi-functional active sites, have been successfully synthesized via a green (aqueous solutions), mild (90 °C, atmospheric pressure), and one-pot modulated hydrothermal (MHT) method. The physical and chemical properties of the obtained catalysts were systematically characterized by different characterization methods. The results indicated that the synthesized catalysts have microporous structure, excellent thermostability and acid-base bi-functional active sites. One-pot synthesis of 5-hydroxymethylfurfural (5-HMF) from glucose was performed to investigate the activities of synthesized catalysts. Benefiting from the synergistic effects of the acid-base bi-functional active sites, the highest 5-HMF yield of 54.9% was achieved in an isopropanol-mediated DMSO system, under the optimal conditions. Moderate to excellent yields of 5-HMF were also obtained from one-pot conversions of other carbohydrates, including inulin , sucrose, cellobiose, maltose and starch , with our developed catalytic system. The one-pot production of 5-HMF from cellulose was also smoothly processed by the g-C 3 N 4 supported UiO-66-type MOFs catalysts in an IL-based system. This work offers a versatile strategy for developing supported UiO-66-type MOFs catalyst for a wide range of biomass transformation to platform chemicals.
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MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Xiu-hua Wei,Xing Qiao,Jie Fan,Yuan-qiang Hao,Yin-tang Zhang,Yan-li Zhou,Mao-tian Xu
Herein, a label-free electrochemiluminescence (ECL) biosensor for sensitive determination of carcinoembryonic antigen (CEA) was fabricated based on CdS quantum dots loaded onto metal organic framework (CdS QDs@MOF) and triethanolamine modified on gold nanoparticles (TEOA@AuNPs) as bi-coreactants of Ru(bpy) 3 2+ ECL system. The TEOA@AuNPs served as not only coreactant of Ru(bpy) 3 2+ but also nanocarrier for CEA aptamer which was bonded to the TEOA@AuNPs through Au–S bond. After incubated in CEA solution, the ECL signals decreased due to the poor conductivity of CEA and there was a linear correlation between the ECL intensity and log(C CEA ). Based on this result, a label-free ECL biosensor has been developed successfully and used to detect CEA with a detection limit of 8.5 × 10 −5 ng/mL. The proposed ECL aptasensor had good analytical performance in the detection of CEA in human serum samples.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Mengyun Lu,Xinwen Jia,Wenjing Zhang,Wuduo Zhao,Ajuan Yu,Gangfeng Ouyang
The enantioselective performance of porous chiral metal–organic frameworks (CMOFs) is closely related to the pore size and uniformity of easily accessible active sites. The chiral recognition efficiency of microporous CMOFs is hindered by the restricted diffusion of the guest. Hierarchical porous chiral CMOFs with multiple pore size regimes ranging from micropores to macropores have emerged as potential candidates in chiral separation applications. 3DOM Zn-MOF-74 crystalline porous material with ordered macro–micropore structure was prepared with a general bottom-up strategy by carrying out the controllable confined growth of Zn-MOF-74 precursor in a removable three-dimensional ordered macroporous (3DOM) polystyrene (PS) template. Then l-tryptophan ( l -Trp) was introduced into MOFs by the strategy of postsynthetic modifications, and finally, a chiral hierarchical porous functional material 3DOM Zn-MOF-74-l-Trp was successfully fabricated. Based on the two luminescent centers from the achiral ligand H4DOBC and chiral ligand l-Trp, the proportional fluorescence sensor 3DOM Zn-MOF-74-l-Trp was hopeful to be applied in the field of enantioselective fluorescence sensing. The enantioselectivity factor values of microporous M-Zn-MOF-74-l-Trp for 1,1′-bi-2-naphthol (Binol) and mandelic acid (MA) were 1.08 and 1.12, respectively. In comparison, the construction of hierarchical porous structure greatly enhanced the chiral recognition performance, which may be due to the improved mass-transfer efficiency of chiral guest molecules and highly swelled accessibility to the chiral recognition sites in this CMOF composite, making the enantioselectivity factor values correspondingly increased to 1.29 and 2.26, respectively.
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ACS Catalysis
·
2024
·
IF 11.3
Ling-Ling Zheng,Lei Tian,Long-Shuai Zhang,Jian Yu,Ying Chen,Qian Fu,Xiao-Zhen Liu,Dai-She Wu,Jian-Ping Zou
The waste of carbon sources and greenhouse gas production during wastewater treatment have become extremely important environmental issues. Herein, the BiOBr/BiVO4 compounds with defect-induced frustrated Lewis acid–base pairs (DFLPs) and internal charge transfer were fabricated to convert the organic pollutants into CO with nearly 100% selectivity. The oxygen vacancy (Ov) induced the built-in electric field in BiOBr/BiVO4 to create directional charge transfer from BiOBr to BiVO4. Density functional theory (DFT) calculations prove that the Ov combines its adjacent hydroxyls to form the DFLP active sites that can additionally capture and activate CO2. Meanwhile, the active sites in BiOBr/BiVO4 reduce the formation-free energy of the COOH* intermediates, which is the key rate-limiting step to convert CO2 to CO with high selectivity. This system has achieved selective conversion of value-added chemicals from organic pollutant degradation and provides a theoretical basis for actual wastewater recycling of carbon sources.
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