筛选条件 :
Chunxian GUO
Xingchen Qiu; Jianyu Yang; Rui Bai; Mengdi Zhao; Changfa Shao; Qingqing Zhao
Sensors and Actuators B: Chemical,
2025
427
-
EI
SCIE
摘要 : The abuse of antibiotics poses a significant threat to both human health and the ecosystem, while the rapid screening of multiple antibiotics remains a challenge. We report the design of a dual-site peroxidase (POD)-mimic nanozyme comprising self-assembled hemin molecules and Cu 2 + on graphdiyne (GDY) for screening of multiple antibiotics assisted with machine learning (ML). Cu ions can bond with π bonds and carbonyl groups on the surface of GDY, thereby enabling strong interface of hemin and GDY for an enhanced generation of hydroxyl radicals ( . OH). GDY/Hemin/Cu exhibits POD-like activity in wide pH conditions and temperatures ranging from 20 to 70 °C. With the assistance of ML, GDY/Hemin/Cu-based colorimetric sensor arrays demonstrate fast and accurate identification of multiple antibiotics including kanamycin, norfloxacin, ampicillin sodium, catechol and isoniazid. Theoretical calculation confirms that strong binding affinity enables specificity of the GDY/Hemin/Cu towards antibiotics. By employing support vector machine algorithm to assess antibiotic content, a high detection accuracy of 97.5 % is achieved across 40 honey samples, underscoring the potential practical applications in screening of multiple antibiotics.
Ziang Min; Qing Tian; Zhuanzhuan Shi; Xiangyu Ding; Chunxian Guo; Chang Ming Li
Journal of Power Sources,
2025
630
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EI
SCIE
摘要 : Microbial Fuel Cells (MFCs) have garnered significant research attention as promising candidates for efficient and eco-friendly energy storage solutions. However, the persistent obstacle of limited electron transfer efficiency continues to hinder their widespread adoption. This study innovatively tackles the challenge of low electron transfer efficiency in MFCs by copolymerizing a conjugated polymer (PDA) with a photocatalytic material (TiO 2 ) onto Shewanella putrefaciens CN32 to create a hybrid microorganism. These hybrids, particularly when utilized as catalysts within MFCs under light illumination, significantly boosted electron transfer rates. Remarkably, the hybrid microorganism demonstrated an impressive current density of 1.07 mA/cm 2 in darkness, which soared to 5.657 mA/cm 2 under illumination. This microorganism exemplifies the synergistic interplay between the PDA and TiO 2, where the PDA serves as an electron accumulator, while TiO 2 converts photons into valuable energy, ultimately enhancing the overall electrochemical performance of the MFCs. This work not only underscores the potential of integrating conjugated polymers and photocatalytic technology within bioelectrochemical systems but also expands the avenues for the development of more efficient and sustainable MFCs.
Changhong Wang; Zhengyang Liu; Quanxiao Peng; Dandan Xing; Tao Hu; Feng Du
Angewandte Chemie,
2025
137
(3)
摘要 : Electrochemical reduction of nitrate to ammonia (NRA) offers a sustainable approach for NH3 production and NO3− removal but suffers from low NH3 yield rate (<1.20 mmol h−1 cm−2). We present bimetallic Cu11Ag3 nanotips with tailored local environment, which achieve an ultrahigh NH3 yield rate of 2.36 mmol h−1 cm−2 at a low applied potential of −0.33 V vs. RHE, a high Faradaic efficiency (FE) of 98.8 %, and long-term operation stability at 1800 mg-N L−1 NO3−, outperforming most of the recently reported catalysts. At a NO3− concentration as low as 15 mg-N L−1, it still delivers a high FE of 86.9 % and an NH3 selectivity of 93.8 %. Finite-element method and density functional theory calculations reveal that the Cu11Ag3 exhibits reduced adsorption energy barrier of N intermediates, favorable water dissociation for H generation and high energy barrier for H2 formation, while its tip-enhanced enrichment promoting NO3− accumulation.
Changhong Wang; Zhengyang Liu; Quanxiao Peng; Dandan Xing; Tao Hu; Feng Du
Angewandte Chemie (International ed. Internet),
2025
64
(3)
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EI
SCIE
摘要 : Electrochemical reduction of nitrate to ammonia (NRA) offers a sustainable approach for NH3 production and NO3− removal but suffers from low NH3 yield rate (<1.20 mmol h−1 cm−2). We present bimetallic Cu11Ag3 nanotips with tailored local environment, which achieve an ultrahigh NH3 yield rate of 2.36 mmol h−1 cm−2 at a low applied potential of −0.33 V vs. RHE, a high Faradaic efficiency (FE) of 98.8 %, and long-term operation stability at 1800 mg-N L−1 NO3−, outperforming most of the recently reported catalysts. At a NO3− concentration as low as 15 mg-N L−1, it still delivers a high FE of 86.9 % and an NH3 selectivity of 93.8 %. Finite-element method and density functional theory calculations reveal that the Cu11Ag3 exhibits reduced adsorption energy barrier of N intermediates, favorable water dissociation for H generation and high energy barrier for H2 formation, while its tip-enhanced enrichment promoting NO3− accumulation.
Lian Ying Zhang; Weiyong Yuan; Jinghao Lu; Maoxia He; Chun Xian Guo; Haijie Cao
Small,
2025
-1
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EI
SCIE
摘要 : Construction of core-shell structured electrocatalysts with a thin noble metal shell is an effective strategy for lowering the usage of the noble metal and improving electrocatalytic properties because of the structure-induced geometric and electronic effects. Here, the synthesis of a novel core-shell structured nanocatalyst consisting of a thin amorphous Pd shell and a crystalline PdCu core and its significantly improved electrocatalytic properties for both formic acid oxidation and oxygen reduction reactions are shown. The electrocatalyst exhibits 4.1 times higher catalytic peak current density and better stability in the formic acid oxidation compared to both a PdCu nanoalloy catalyst and a Commercial Pd-C catalyst. An excellent electrocatalytic performance of the core-shell nanocatalyst is also observed in the oxygen reduction reaction. Computational calculation results reveal that tuning of the electronic state of Pd by the amorphous shell and the Cu in the PdCu core weaken the binding strength of surface Pd─O bonds, leading to a bond elongation to facilitate bond breaking. As a result, the electrocatalytic activity in both formic acid oxidation and oxygen reduction reactions is enhanced.
Chunzi Yang; Ming Zhao; Chunmei Zhang; Shan Zhang; Dongdong Zhu; Chunxian Guo
Chemical Communications,
2025
61
(1)
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EI
SCIE
摘要 : An Fe-doped Ni-based oxalate framework, synthesized via a facile co-precipitation method, is applied as an excellent bi-functional electrocatalyst for water and urea oxidation reactions. The obtained framework achieved a large current density of 100 mA cm−2 at 1.497 V and 1.375 V (vs. RHE) for the OER and UOR, highlighting its potential for practical hydrogen production.
LIU Liang; SHI Zhuanzhuan; LI Yuan; LI Yunpeng; WU Xiaoshuai; SHI Fan
Cailiao Gongcheng/Journal of Materials Engineering,
2024
52
(11)
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EI
ESCI
摘要 : Black phosphorus (BP) nanosheets have a special folded structure, which gives them an adjustable band gap, transmission anisotropy, and photoluminescence. These unique properties make BP nanosheets widely used in the construction of metal ion sensors and show great application potential in environmental monitoring and other research fields. In this paper, the preparation methods of BP nanosheets and their applications of different sensors in detecting heavy metal ions were introduced. Firstly, different preparation methods for BP nanosheets were introduced based on the "top-down" and "bottom-up" methods, and their advantages and disadvantages were summarized. Then, the research progress of BP nanosheets based field effect transistor (FET) sensors, electrochemical sensors, and photochemical sensors for the detection of heavy metal ions were described in detail. Among these sensors, the FET sensor shows an excellent detection limit, the electrochemical sensor has advantages of short response time and simple operation. The photochemical sensor shows a wider detection range than that of others. Furthermore, it is concluded that the types of heavy metal ions that BP nanosheets based sensors can detect are relatively limited, and the stability and selectivity need to be further improved. Finally, in view of the challenges faced by BP nanosheets for constructing different types of heavy metal ion sensors, we should develop low-cost and high-quality BP nanosheets preparation methods, and structure optimization and functional modification of BP nanosheets. In the aspect of expanding the application of BP nanosheets for the detection of heavy metal ions, it is expected to make a breakthrough in the practical applications by combining with novel technology.
Duan, Xiaoge; Shi, Xinrui; He, Zhaoyuan; Chen, Hongcai; Shi, Zhuanzhuan; Zhao, Zhi
Mikrochimica acta (1966. Print),
2024
191
(12)
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SCIE
摘要 : Escherichia coli (E. coli) O157:H7 is an important food-borne pathogen that can cause hemorrhagic diarrhea and enteritis in humans and animals. Realizing the rapid quantitation of E. coli O157:H7 is of great significance for the guarantee of food safety and disease control. In this study, an electrochemical immunosensing technique based on a functionalized composite of Cu-metal organic framework (Cu-MOF) and poly (3, 4-ethylenedioxythiophene)-poly (styrenesulfonate) (PEDOT:PSS) is developed, achieving rapid and sensitive quantitation of E. coli O157:H7 in food and clinical feces samples. The organic functionalization of Cu-MOF significantly improves the interface conductivity to facilitate electron transfer and provides the sulfonic groups (–SO3H) to conjugate bio-recognizing elements for target determination. The immunosensor delivers a linear detection range of 3 × 102 ~ 3 × 108 cfu/mL, a low limit of detection (LOD) of 7.4 cfu/mL, and a short analysis time of 40 min. In addition, it does not show any cross-reactivity with other common pathogens and exhibits high repeatability with relative standard deviations (RSDs) all lower than 2.09%, providing a promising approach for warranting food safety and control of E. coli O157:H7 disease.
Chunmei Zhang; Xuanyu Wu; Chengyuan Zha; Lei Li; Hao Lu; Ting Chen
ACS Applied Nano Materials,
2024
7
(17)
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EI
SCIE
摘要 : Accordion-like multilayered Ti3C2Tx MXene has garnered significant attention due to its high conductivity and sensitivity, thereby being promising for acetone sensing. However, the limited stability of thin-layered MXene hinders its applications at high temperature. In this study, MXene/Co3O4 was synthesized via a self-assembly method by coating thin-layered MXene with Co3O4 nanosheets (Co3O4 NS) to enhance acetone sensing performance, especially at a high temperature of up to 200 °C. An interfacial electric field arises between Ti3C2Tx MXene and Co3O4 NS because of their different work functions. Due to a synergistic effect of the interfacial electric field and the surface-coated Co3O4, MXene/Co3O4 achieves the highest response intensity for acetone concentrations ranging from 0.1 to 1000 ppm, surpassing the individual sensitivities of Co3O4 NS and MXene alone. Remarkably, the detection limit of MXene/Co3O4 (0.1 ppm) outperforms those of Co3O4 NS and MXene. Employing the AdaBoost algorithm for machine learning, MXene/Co3O4 demonstrated 99.76% accuracy in distinguishing acetone from six other gases, holding great potential for practical gas sensing applications. The acetone adsorption energy of the MXene/Co3O4 heterojunction calculated by density functional theory is −0.97 eV, indicating easier adsorption than MXene and Co3O4 NS. This study presents a facile approach to fabricate MXene/metal oxide-based materials for acetone sensing, offering promising prospects in gas sensor development and showing universal significance for gas sensing fabrications.
Qiulin Li; Yajing Cui; Yuxin Xiao; Zhexuan Ni; Shanrong Dai; Feng Chen
Talanta,
2024
275
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EI
SCIE
摘要 : Three-dimensional sponge-architecture covalent organic frameworks (COFs)-aerogel was successfully designed and synthesized via a freeze-drying template approach, and utilized as an efficient sorbent in solid-phase extraction (SPE). A method for selective enrichment of pharmaceutical contaminants including tetracycline, chlortetracycline, methacycline and oxytetracycline in the environment and food samples was proposed by combining with high performance liquid chromatography (HPLC). To understand the adsorption mechanism, selectivity test and molecular dynamics (MD) simulated calculation were both carried out. The experimental and in-silico results demonstrated that the COFs-aerogel possessed high selectivity for contaminants with H bond acceptors/donors and good efficiency with maximum adsorption capacity up to 294.1 mg/g. The SPE-based HPLC method worked well in the range of 8–1000 ng/mL, with the need of little dose of adsorbent and sample volume while no need of spectrometer, outgoing the reported adsorbents. Under the optimized conditions, the intra-day and inter-day relative standard deviations (RSD) of repeatability were within 2.78–6.29 % and 2.44–8.42 % (n = 5). The results meet the current detection requirement for practical applications, and could be extended for further design of promising adsorbents.