ACS Applied Materials & Interfaces
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2024
·
IF 8.3
Ya-Nan Zhang,Shuai Feng,Shi-Hua Zhao,Bo-Wen Gao,Cheng-Xiang Wang
Perovskite solar cells (PSCs) have emerged as a leading photovoltaic technology due to their high efficiency and low cost. Even though they have developed rapidly since their inception, with efficiencies of over 26%, inverted PSCs face challenges such as nonradiative recombination and ion migration. Surface treatment, especially the utilization of organic compounds, has improved efficiency and stability by optimizing the perovskite–charge transport layer interface. Herein, we report a facile and effective strategy by introducing 2,2′-bipyridyl to modify the surface of perovskite, achieving a power conversion efficiency of 24.43% with increasing open-circuit voltage and fill factor and good repeatability on multiple devices. We reveal that the 2,2′-bipyridyl molecule can chelate lead ions on the surface of perovskite, effectively suppressing nonradiative recombination. Furthermore, this modification can induce surficial n-doping to refine the energy level alignment, thereby minimizing charge transport losses. Additionally, the device maintained over 92% of the initial efficiency after 1000 h of operation at the maximum power point under continuous illumination. This surface chelation and defect passivation strategy employing 2,2′-bipyridyl offers a promising avenue for exploring the details of potential long-term degradation mechanisms and the development of commercially viable high-performance p-i-n PSCs.
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APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
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2025
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IF 3.3
Zhao Bingshan,Micklefield Jason,Wang Yonghua,Wang Fanghua
N-trans -feruloyltyramine (FLA) is one kind of phenylpropanoid compound found in various plants. Numerous studies have confirmed that it exhibits a wide range of physiological functions, such as antioxidant, ɑ-glucosidase inhibition, and anti-inflammatory activity. However, the low content of FLA in plants greatly limits its potential use in food and pharmaceutical industries. It is, therefore, very important to establish an effective synthesis of FLA. In this study, a green and efficient method to synthesize FLA was sought using an amide bond synthetase (ABS) biocatalyst. Ten kinds of ABS enzymes, including AlCfaL from Azospirillum lipoferum , were screened as the potential biocatalysts for the production of FLA. To obtain optimum reaction conditions, the effects of various parameters on conversion of FLA were firstly evaluated. Under the optimum conditions using 1 mM N-trans -ferulic acid, 50 mM tyramine (substrate ratio of 1:50), 10 mM MgCl₂, 8 mM ATP, and 35 µM AlCfaL enzyme at 30 °C with a shaking speed of 500 r/min for 48 h, maximum conversion rate of 74% was reached. Given that the amidation reaction is mediated by relative expensive ATP, we further optimized reaction systems to incorporate an ATP recycling system consisting of a polyphosphate kinase enzyme (CHU) and an inexpensive polyphosphate (PolyP) as the phosphate donor. Response surface methodology (RSM) based on five-level, five-variable central composite design (CCD) was used to evaluate the optimal parameters for the production of FLA. The effects of AMP, PolyP, AlCfaL, CHU concentrations, and reaction time on the conversion rate of FLA were analyzed. The optimum conditions derived via RSM were 7.12 mM AMP, 5.96 mg/mL PolyP, 39.72 μM AlCfaL, 27.68 μM CHU, and a reaction time of 36 h. Validation experiments conducted under these optimized conditions yielded an actual conversion rate of 63.5%, which compared well to the maximum predicted value of 64.2%.
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ANALYTICA CHIMICA ACTA
·
2025
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IF 6
Shuyue Sun,Yonglin Feng,Haonan Li,Sijia Xu,Huijuan Huang,Xuan Zou,Ziquan Lv,Xiangjie Yao,Shuiqing Gui,Yinghua Xu,Xiaobao Jin,Xuemei Lu
Background Infections caused by foodborne pathogens pose a major threat to human health. Traditional bacterial detection methods, such as plate culture and polymerase chain reaction, cannot meet the growing demand for fast and accurate detection. In contrast, colorimetric sensors have the characteristics of convenience, speed, and visualization, but their specific sensitivity is relatively poor. Therefore, it is necessary to develop a biosensor with selective identification of foodborne pathogens, high sensitivity, and early detection of foodborne pathogen contamination in food. Results We have developed a broad-spectrum microbial detection biosensor platform MDC@N-MMCNs that combines antimicrobial peptides as identifying ingredients with mesoporous carbon with peroxidase-like activity to detect and eliminate foodborne pathogens rapidly. In this study, nitrogen-doped magnetic mesoporous carbon nanospheres (N-MMCNs) were prepared using ferric nitrate as the magnetic source. Musca domestica cecropin (MDC) has abundant recognition sites on the surface of bacteria, which helps to recognize and amplify the signal, and combines with N-MMCNs to form MDC@N-MMCNs. MDC@N-MMCNs have high stability, specificity, and sensitivity, with a visual detection limit as low as 10 2 CFU/mL. The MDC@N-MMCNs paper-based sensor enables selective and rapid detection of four foodborne pathogens via a smartphone application. Significance Based on these findings, we believe that MDC@N-MMCNs hold great potential for on-site bacterial infection diagnosis in resource-limited environments or point-of-care (POCT) settings, offering a simple, cost-effective solution for food safety and public health.
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JOURNAL OF COORDINATION CHEMISTRY
·
2025
·
IF 2.1
Xiaoling Luo,Zheng Liu,Xiaoqi Lan,Pintian Zou,Xiangfei Kong,Guo-Cheng Han
We study the non-covalent interactions within complexes and characterize the structure and properties of N-heterocyclic dicarboxylic acid rare earth complexes. The chelating ligand 2,2′-bipyridine-6,6′-dicarboxylic acid (H2bpdc) was reacted with neodymium nitrate hexahydrate and dysprosium nitrate pentahydrate in a solvothermal reaction to produce {[Nd(bpdc)(HCOO)(H2O)2]·H2O}n (A) and [Dy2(bpdc)3(H2O)2(DMF)]·3H2O (B), respectively. Single crystal X-ray diffraction characterization reveals that A is a metal organic framework, with the rare earth center adopting a nine-coordinated tricapped trigonal prism. In contrast, B forms an eight-coordinate triangular dodecahedron. Fluorescence analyses indicate that both A and B have excellent luminescence properties. The thermal stabilities of both complexes were examined using thermogravimetric analysis (TG and DTG), and A has better thermal stability than B.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
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IF 8.4
Si-Yi Ren,Zhao-Xing Peng,Jin-Ru Feng,Xi-Ming Zeng,Hong-Gang Ni
Tri-n-butyl phosphate (TBP), a widely used organophosphorus flame retardants, is bioaccumulative, persistent, and toxic. In the real world, heavy metals co-occurrence with TBP often inhibit biodegradation of this pollutant. Immobilized microbial technology offers a promising way for mitigating TBP contamination. In this study, immobilized bacterial microspheres were prepared with sodium alginate (SA) and polyvinyl alcohol (PVA) as carrier materials and Sphingobium xenophagum as the functional microorganism to enhance TBP removal. Magnetic nanoparticles Fe 3 O 4 (sizes of 20 nm, 100 nm, and 200 nm) were introduced to enhance the mechanical strength and microbial activity of the microspheres. The results showed that the optimal environmental conditions for TBP removal were 35 °C and pH 8.0. The Fe 3 O 4 (200 nm)-PVA-SA bacterial microspheres exhibited the best performance, with larger specific surface area and abundant active groups (O-H, -OH, and -COOH). The removal rate exhibited 81.72 % at 5 mg/L within 4 d, which was higher than that of free microorganisms (62.23 %). For Cu 2+ , Zn 2+ , Ni 2+ , and Cd 2+ , the toxicity of Cd 2+ to free microorganisms was greater, while the bacterial microspheres were tolerant to heavy metal stress, especially the Fe 3 O 4 (200 nm)-PVA-SA bacterial microspheres; the TBP removal rate remained at approximately 80.00 % even under multiple heavy metals contamination. Additionally, the Fe 3 O 4 (200 nm)-PVA-SA microspheres maintained high stability and TBP removal rate in 5 consecutive cycles of TBP removal tests and 50 days of storage at 4 °C. The magnetic recyclability, stability, and reusability of the bacterial microspheres offer the potential for efficient and environmentally friendly wastewater treatment. The results provide a theoretical foundation for the development of high-performance immobilized microbial materials and technical support for the effective treatment of organic pollutants in harsh environments.
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MOLECULES
·
2025
·Vol. 30
·期 8
·1708
·
IF 4.6
Yashu Li,Nan Wang,Lu Zhao,Xuanhe Liu,Lin Wang,Chengcheng Xie,Jing Li
Developing low-cost, efficient, and scalable non-precious metal electrocatalysts for the oxygen reduction reaction (ORR) remains a critical challenge in the field of energy conversion. Among various candidates, Fe-N-doped carbon materials have garnered attention as promising alternatives to commercial Pt/C catalysts for ORR. In this study, we report an Fe-N catalyst synthesized by incorporating iron phthalocyanine withCinnamomum longepaniculatumwaste leaves as the carbon source. This catalyst exhibited an excellent four-electron ORR activity and the half-wave potential (E1/2) reaches 0.875 V, which was superior to that of commercial Pt/C (E1/2= 0.864 V). Additionally, the catalyst exhibits superior methanol tolerance and stability compared to commercial Pt/C. This approach, which utilizes biomass waste for the synthesis of electrocatalysts, not only provides an effective solution for reducing environmental waste but also addresses the issue of sluggish cathodic ORR kinetics in fuel cells, making it suitable for low-cost, large-scale industrial production.
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ChemSusChem
·
2019
·Vol. 12
·期 14
·3390-3400
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IF 7.804
Nan Jia,Jing Liu,Yunshan Gao,Pei Chen,Xinbing Chen,Zhongwei An,Xifei Li,Yu Chen
Graphical Bifunctional electrocatalyst : A nanocomposite with graphene-encapsulated Co 9 S 8 nanoparticles loaded on N,S-codoped carbon nanotubes is fabricated as a highly efficient and stable bifunctional electrocatalyst for the oxygen reduction and evolution reactions. It can be used as the air electrode in the rechargeable Zn–air battery. An inexpensive and efficient bifunctional electrocatalyst for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is central to the rechargeable zinc–air battery. Herein, a nanohybrid, in which N,S-codoped carbon nanotubes were decorated with Co 9 S 8 nanoparticles encapsulated in porous graphene layers, was fabricated by a one-step heat-treatment process. The N,S dopant species were the major active sites for the ORR, and Co 9 S 8 nanoparticles were mainly responsible for the OER. Compared with commercial 20 wt % Pt/C and Ir/C electrocatalysts, this nanohybrid exhibited a comparable ORR half-wave potential (0.831 V vs. reversible hydrogen electrode) and OER potential (1.591 V at 10 mA cm −2 ), better long-term stability in an alkaline medium, and a narrower potential gap (0.76 V) between ORR and OER. Furthermore, as air electrode of the rechargeable zinc–air battery, it delivered a low charge–discharge voltage gap (0.65 V at 5 mA cm −2 ), high open-circuit potential (1.539 V), good specific capacity (805 mA h g at 5 mA cm −2 ), and excellent cycling stability (48 h), superior to those of commercial Pt/C and Ir/C catalysts, and thus showed promise for applications in renewable energy conversion devices.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Qingsong Luo,Yu Wan,Zhenxing Wang,Shuang Gao,Yan Chen,Changhao Feng
In the field of environmental monitoring, metal oxide semiconductor (MOS)-based gas sensors demonstrate significant advantages in detecting volatile organic compounds (VOCs) in ambient air. Gas sensors based on Yttrium-doped Zinc Ferrite nanofibers (Y-doped ZFO NFs) are fabricated via a conventional electrospinning method, with varying molar ratios of Y/Zn (0 at%, 2 at%, 4 at%, and 6 at%). Here, the doping of rare earth element Y significantly enhances the gas sensing performances. The structural and morphological information of both pristine ZFO and Y-doped ZFO NFs have been characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and Transmission electron microscope (TEM). Compared with pure ZFO, the 4 at% Y-doped ZFO (S3) exhibits a 4.46-fold higher response (R a /R g = 43.1) to 100 ppm n-butanol at 150℃ with a fast response time of 11 s. Additionally, the Y-doped ZFO NFs gas sensors exhibit outstanding selectivity, remarkable long-term stability, and a low limit of detection (LOD) attributed to their small grain size, porous and rough morphology, abundant oxygen vacancies, and the formation of n-n heterojunctions.
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JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Mingming Chu,Wenjing Sun,Songbing Yu,Yuanhang Li,Fangyu Zhu,Lijuan Yu,Yongyong Cao,Xuebo Cao,Yiming Li
Covalent organic frameworks (COFs) that incorporate heterocycles featuring multiple nitrogen atoms, such as triazine, bipyridine, and heptazine, are seen as promising heterogeneous photocatalysts for CO 2 photoreduction, while the substantial effect of N-atom relative locations in this transformation has rarely been systematically studied. Herein, a collection of isostructural porphyrin-based COF catalysts bearing bipheyl, 2–2′-bipyridine and 3–3′-bipyridine are judiciously designed for CO 2 photoreduction under simulated sunlight irradiation (1000 W/m 2 ). As results, comparing with the frequently used biphenyl and 2–2′-bipyridine unit, the porphyrin COF incorporating 3–3′-bipyridine yields a significant enhancement in photoelectric properties, and the CO production rate of 3–3′-Bpy-COF is 2 and 10 times higher than that of 2–2′-Bpy-COF and Bp-COF. Insights on the origin of the improved photocatalytic activity and reaction mechanism are further investigated, revealing above tiny variation of N sites results in a larger dipole moment for the 3–3′-Bpy-COF, facilitating the separation and transfer of photogenerated excitons. Moreover, The X-ray Photoelectron Spectroscopy (XPS) and Density Functional Theory (DFT) calculations reveal that the 3–3′-bipyridine N-atoms can strategically adjust the electron density surrounding the M−N4 active center of porphyrins, which stabilize the *COOH intermediate and reduce the energy barrier of the rate-determining step. This work highlights the collaborative influence of porphyrin and the steric location of N atoms within COFs photocatalysts for CO 2 reduction reaction, offering a new insight to design COFs endowed with exceptional capabilities for photocatalysis.
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JOURNAL OF POWER SOURCES
·
2025
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IF 7.9
Haoran Liu,Rui Hou,Yilin Li,Junzhi Li,Guangshe Li,Zheng Lou,Dongdong Li,Wei Han
Antimony, as the anode of potassium ion batteries, has a satisfactory theoretical specific capacity (660 mAh g −1 ). However, the lattice expansion after potassization and insufficient conductivity of antimony hinder the practical application of Antimony based electrodes. A novel synthesis strategy for necklacelike biomass derived carbon fibers linked with MOF encapsulated Sb nanoparticles composite electrode is reported, wherein the unique structure of metal-organic frameworks (MOFs) is utilized to achieve nanoscale confinement and the inherent adsorption properties of fungi are exploited to construct conductive networks. The unique carbon encapsulation of MOF materials effectively controls the size of antimony particles and limits the expansion after potassization. The fixation of one-dimensional carbon fiber can prevent the powdering and shedding of the active materials and improve the cycle life of the composite electrodes. Electrochemical experiments and theoretical calculations show that NCFs@Sb@C anode has good conductivity and fast potassium ion diffusion kinetics. After 400 cycles at 1 A g −1 , NCFs@Sb@C still has a high reversible specific capacity of 129.3 mAh g −1 , which is significantly better than that of NCFs and Sb@C. In addition, the full cell of NCFs@Sb@C anode matched with PTCDA cathode exhibits good cycling stability, demonstrating the practical application potential of this composite electrode.
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MOLECULES
·
2025
·Vol. 30
·期 22
·4368
·
IF 4.6
Shanhao He,Li Liu,Min Liu,Jinjun Tian,Yan Xue,Keliang Wu
To address the challenges of low solar energy utilization efficiency and rapid recombination of photogenerated charge carriers in photocatalytic hydrogen evolution, this study successfully constructed a composite photocatalyst of ZnIn2S4(ZIS) supported on N-doped hollow carbon spheres (N-HCS), denoted as ZIS/N-HCS, via a combination of template etching and in situ growth strategies. Characterization results demonstrate that this hollow structure possesses a high specific surface area (48.41 m2/g) and a narrowed bandgap (2.41 eV), achieve broad-spectrum light absorption, thereby enabling the catalyst to generate a local hot spot temperature of 136 °C under AM1.5G conditions. The optimized ZIS/N-HCS-0.30 sample exhibited a significantly enhanced photocurrent response (8.26 μA cm−2) and improved charge separation efficiency. When evaluated at a set solution temperature of 20 °C, the material exhibited a photocatalytic hydrogen evolution rate of 17.03 mmol g−1·h−1, which is 7.06 times higher than that of pure ZIS. Furthermore, it demonstrated excellent cycling stability. This work elucidates the synergistic role of the hollow photothermal structure in enhancing solar energy utilization and catalytic reaction kinetics, providing a new strategy for designing efficient solar-driven hydrogen production systems.
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Korean Journal of Materials Research
·
2025
·Vol. 35
·期 8
·352-365
·
IF 0.3
Haixia Wang,Yilei Sun,Yao Liu,Kunjie Li,Zeda Meng,Won-Chun Oh
The catalyst materials 0N-Cu-MOF, 1N-Cu-MOF, and 2N-Cu-MOF were successfully synthesized usinga solvothermal method, and using different concentrations of nitrogen-modified Cu organic frameworks (xN-Cu-MOF). Characterizations using X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) surface area analysis showed that 1N-Cu-MOF had the largest SSA and pore size among the three materials synthesized. 1N-Cu-MOF exhibited the largest pore size and specific surface area among the three materials, which had a decisive effect on CO2 reduction. In addition, stability and CO2 reduction reaction (CO2RR) activity were evaluated by linear sweep voltmeter, cyclic voltmeter, electrochemical impedance spectroscopy, and time flow tests. Faradaic efficiency (FE) was determined by product analysis. Among the three catalyst materials, 1N-Cu-MOF showed the best catalytic performance at 50 mA·cm-2 (maximum current density). The charge transfer resistance was 8.23 Ω, the average current density was 19.9 mA·cm-2, and the FE of methane (CH4) production showed a high efficiency of 70.45 % when tested for 12 h at an overpotential of -0.35 V (to-RHE).
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