JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Kai-Wen Cao,Hao Huang,Fu-Min Li,Hong-Chang Yao,Juan Bai,Pei Chen,Pu-Jun Jin,Zi-Wei Deng,Jing-Hui Zeng,Yu Chen
The reactive and stable catalysts for the oxygen reduction reaction are highly desirable for low temperature fuel cells. The commercial oxygen reduction reaction electrocatalysts generally reply on noble metal based nanomaterials, which suffer from inherent cost and selectivity issues. At present, it still remains challenge for designing efficient non-noble metal-based oxygen reduction reaction electrocatalysts. Herein, we successfully synthesize Co nanoparticles supported on three-dimensionally N-doped holey graphene aerogels hybrids by the high-temperature calcination of the graphene aerogels-polyallylamine-Co II hybrids. The component optimized hybrids show the excellent electrocatalytic activity for oxygen reduction reaction in alkaline media, which is comparable to commercial Pt/C electrocatalyst. Meanwhile, the hybrids also show eminent tolerance for CO and methanol, attributing to their excellent oxygen reduction reaction selectivity. The three-dimensionally interconnected structure of graphene aerogels, N-doping, uniform dispersion and high crystallinity of Co nanoparticles, and holey structure of graphene contribute to the striking oxygen reduction reaction activity of hybrids.
研究领域:
材料科学
·
电化学
·
纳米催化
·
能源材料
·
燃料电池
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MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Juguo Dai,Lili Luo,Xiaohong Wang,Long Xia,Hongmei Xie,Chunying Yang,Ruipan Wang,Yiting Xu,Lizong Dai
Nowadays, energy conversion devices have gradually gained attention while vigorously developing clean energy. Carbon materials are promising candidates for supercapacitors , but two issues have plagued the researchers. 1) Does the cation radius in the neutral electrolyte significantly impact the electrochemical performance of carbon materials? 2) How to introduce heteroatoms while constructing hollow structures in carbon spheres. This work proposes a facile template free strategy that uses aniline and pyrrole as nitrogen sources to synthesize carbon sphere precursors. High-temperature carbonization combined with alkali treatment leads to the formation of N-doped hollow porous carbon spheres. Robust wall structure (thickness is about 60–80 nm) and ideal surface structure (the specific surface area is 1079.9 m 2 g −1 ) endow the carbon spheres with excellent electrochemical performance and outstanding cycle stability. The specific capacitance of the carbon spheres in Li 2 SO 4 and Na 2 SO 4 electrolytes under negative working potential (−0.8–0 V) are 378.4 and 367.6 F g −1 , respectively, at a current density of 1 A g −1 . After 5000 cycles, the capacitance retentions are 87.1% and 94.8% in Li 2 SO 4 and Na 2 SO 4 electrolytes. We inferred that the cation radius has a negligible effect on the specific capacitance of carbon materials, but has a more significant effect on the cycling stability and capacitance rate performance. It is hoped that this work can provide a reference for the subsequent construction of N-doped hollow carbon spheres and reasonable selection of electrolytes.
研究领域:
材料科学
·
电化学
·
纳米能源
·
功能材料
·
储能技术
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APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2014
·Vol. 174
·期 6
·2236-2244
·
IF 1.687
Dai Yong,Shao Rong,Qi Gang,Ding Bin-Bin
In this study, it was the first report that the Brevibacterium lutescens CCZU12-1 was employed as a sulfur removing bacteria. Using dibenzothiophene (DBT) as the sole sulfur source, B. lutescens could selectively degrade DBT into 2-hydroxybiphenyl (2-HBP) via the “4S” pathway. In the basal salt medium (BSM) supplemented with 0.25 mM DBT and 0.5 g/L Tween-80, high desulfurization rate (100 %) was obtained by growth cells after 60 h. Furthermore, the n -octane–water (10:90, v / v ) biphasic system was built for the biodesulfurization by resting cells. Moreover, a combination of magnetic nano Fe 3 O 4 particles with calcium alginate immobilization was used for enhancing biodesulfurization. In this n -octane–water biphasic system, immobilized B. lutescens cells could be reused for not less than four times. Therefore, B. lutescens CCZU12-1 shows high potential in the biodesulfurization.
研究领域:
生物脱硫
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环境生物技术
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微生物技术
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石油生物炼制
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应用微生物学
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CERAMICS INTERNATIONAL
·
2021
·Vol. 47
·期 8
·11332-11339
·
IF 4.527
Gui-Yang Luo,Yi-Jing Gu,Yuan Liu,Zi-Liang Chen,Yong-lin Huo,Fu-Zhong Wu,Yi Mai,Xin-Yi Dai,Yong Deng
LiFePO 4 modified by N-doped graphene (NG) with a three-dimensional conductive network structure was synthesized via a one-step in situ hydrothermal method . The effects of N amount of NG on the phase structure, morphology, and electrochemical properties of LiFePO 4 are investigated in this study. X-ray diffraction (XRD) results show that doping suitable N amounts in NG do not alter the crystal structure of LiFePO 4, and scanning electron microscopy (SEM) images show that NG can slightly reduce the particle size of LiFePO 4 . The high-resolution transmission electron microscopy (HRTEM) results show that the LiFePO 4 particles are well covered and connected by NG. The electrochemical performance confirms that LiFePO 4 modified by 20% N-doped graphene (named LFP/NG-4) displays a perfect specific capacity of 166.6 mAh·g −1 at a rate of 0.2C and can reach 125 mAh·g −1 at a rate of 5 C. Electrochemical impedance spectroscopy (EIS) results illustrate that the charge transfer resistance value of the LFP/NG-4 composite is only 58.6 Ω, which is very low compared with LiFePO 4 . Cyclic voltammetry (CV) tests indicate that the addition of 20% N-doped graphene can effectively reduce electrode polarization and improve reversibility. The LFP/NG-4 composite with a three-dimensional conductive network structure can be regarded as a promising cathode material for Li-ion batteries.
研究领域:
材料科学
·
电化学
·
储能
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·145
·
IF 36.3
Zhai Rui,Wen Zhuorui,Zhao Xuewen,She Junyi,Gu Mengyue,Bu Fanqi,Huang Chang,Meng Guodong,Cheng Yonghong,Zhang Jinying
Violet arsenic phosphorus (VP-As) single crystals were synthesized and characterized by single crystal X-ray diffraction to be P 83.4 As 0.6 (CSD-2408761), the P12 is occupied by arsenic/phosphorus as a mixed occupancy site.
The p-type VP has been switched into n-type VP-As, the effective electron mass was significantly reduced and resulted in high electron mobility of 2622.503 cm 2 V −1 s −1 .
High electron mobility of 137.06 cm 2 V −1 s −1 has been achieved from field effect transistor, much higher than the hole mobility of VP.
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Nature Communications
·
2026
·
IF 15.7
He Qingyun,Wang Junbo,Wu Mengyang,Zhong Chongyu,Li Lei,Zhao Xiangru,Ding Mengzhu,Yang Pinghui,Li Renzhi,Huang Wei,Qin Tianshi,Wang Fangfang
Formamidinium lead iodide (FAPbI 3 ) perovskite is a leading candidate for high-efficiency solar cells, but its application is hindered by the kinetic instability of its α-phase crystallization. Here, a highly effective strategy for directing the ordered crystallization of α-FAPbI 3 in the n-i-p architecture is developed by incorporating a self-assembled molecule (SAM) into the anti-solvent, unlike conventional phosphate-based SAMs requiring polar protic solvents, the -SCN SAM are processed from non-polar, aprotic solvents compatible with perovskite surfaces. An in-situ formed, self-assembled layer acts as a dynamic template, guiding the top-down crystallization process to yield highly ordered α-phase films. Through a series of in-situ measurements, it is rigorously demonstrated that this SAM treatment suppresses undesirable intermediate phases, accelerates the δ-to-α transition, and strategically slows crystal growth, promoting highly ordered films. This meticulously designed strategy culminates in high-quality perovskite films, enabling single-junction devices with a champion power conversion efficiency (PCE) of 26.18% (certified at 25.67%) and mini-modules with a PCE of 21.70%. These results underscore the power of directed self-assembly in fabricating highly efficient and stable n-i-p perovskite solar cells.
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FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2023
·
IF 2.3
Peng Du,Zhengkun Chu,Jing Zhang,Jieyu Ma,Feng Cao,Jie Liu
Hydroquinone (H2Q) present in water is becoming a growing problem in both daily life and industry, with various harmful effects on human health. Therefore, the detection of H2Q is very important. The Carbon dot-based sensor is considered an effective method to detect H2Q. In this work, Pericarpium citri reticulatae carbon dots (P-CDs) were synthesized by a one-pot hydrothermal method for wide linear sensing of H2Q. An orthogonal test was used to expand the active site and fluorescence properties of P-CDs. Under optimal conditions, the P-CDs exhibit an extremely stable blue fluorescence and a quantum yield (QY) of up to 15.4%. In the range of 5–1000 μM, compared with the currently reported carbon dot-based H2Q sensors, the fluorescence intensity (FL) of P-CDs shows good linearity with the variation of H2Q concentration and a higher linear range. Moreover, the sensor demonstrates a low detection limit of 0.058 μM. The possible detection mechanism is based on the synergistic action of static quenching and IFE. This method has been successfully applied to the determination of H2Q in real samples, and the P-CDs-based sensor has the potential to detect H2Q in various complex scenes.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Guirong Duan,Jie Jiang,Yanqing Jiao,Jiaqi Wang,Xi Zhao,Ganceng Yang,Haijing Yan,Honggang Fu
Developing low-cost, corrosion-resistant catalytic electrodes for the oxygen evolution reaction (OER) is essential for efficient and durable hydrogen production via anion exchange membrane water electrolysis (AEMWE). Herein, we report a polydopamine (PDA)-coated Fe,Cr codoped NiS2 self-supporting electrode (PDA-Fe,Cr-NiS2@NF). The nitrogen-rich functional groups of PDA establish robust M-N coordination bonds with active metal centers, thereby suppressing metal dissolution during anodic reconstruction. In parallel, the conductive PDA layer regulates interfacial electron redistribution and optimizes the hydrogen-bond network of interfacial water, lowering the OER activation energy. Its conformal protective layer further enhances catalyst stability. The optimized electrode delivers an OER overpotential of only 247 mV at 1 A cm–2. When integrated as the anode with a PtNiC cathode in an AEMWE cell, the system reaches a current density of 1 A cm–2 at only 1.737 V at 70 °C and operates stably for 1000 h, with a voltage decay rate of only 0.1 mV h–1, an electrolysis efficiency of 71.96%, and an energy consumption of 4.157 kWh Nm3– H2. This work establishes a viable coordination-protection strategy for constructing durable, high-performance OER electrodes for industrial-scale water electrolysis.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 19
·1466
·
IF 3.2
Valabhoju Madhuker,Pothukanuri Nagaraju,Kathirvelu Velavan,Parne Saidi Reddy
Titanium-based metal–organic frameworks (Ti-BDC MOFs) were synthesized via a solvothermal route at different temperatures ranging from 110 to 170 °C using terephthalic acid as the organic linker. The synthesized samples were systematically characterized using X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy (UV–Vis), Brunauer–Emmett–Teller (BET) surface area analysis, and thermogravimetric analysis (TGA) to investigate their structural, morphological, optical, and thermal properties. X-ray diffraction (XRD) studies revealed temperature-dependent variations in crystallinity and phase evolution, while FESEM analysis demonstrated significant morphological transformations with increasing synthesis temperature. EDX confirmed the presence of Ti, O, and C elements, validating the successful formation of the Ti-BDC framework. FTIR spectra verified the coordination between Ti metal centers and BDC linkers, whereas TGA indicated good thermal stability with framework integrity maintained up to approximately 280 °C. Ultraviolet–visible studies were employed to determine the optical band gap, and BET analysis revealed the microporous and hierarchical porous nature of the synthesized materials. Gas sensing characteristics toward n-butanol were evaluated under ambient conditions using the static liquid distribution method. Among all samples, the Ti-BDC MOF synthesized at 150 °C exhibited the best sensing performance toward 5 ppm n-butanol, showing superior response–recovery behavior, excellent selectivity, and long-term stability, with a limit of detection (LOD) of 2.66 ppm. The enhanced sensing performance is attributed to the optimized crystallinity, porous architecture, and abundant active adsorption sites that facilitate efficient gas diffusion and charge transfer processes. These findings demonstrate the potential of Ti-BDC MOFs as promising sensing materials for low-concentration n-butanol detection in environmental monitoring and workplace safety applications.
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LANGMUIR
·
2026
·Vol. 42
·期 30
·22067-22077
·
IF 4.4
He Fu,Zhou Jiahong,Guan Hongwei,Chen Yuejia,Li Zhuo,Xu Tiefu
Heterogeneous photo-Fenton technology is an efficient
advanced
oxidation process for the removal of organic pollutants in water.
This process accelerates the reduction of Fe 3+ to form
Fe 2+ by photoelectrons (e – ), thereby
enabling the sustained generation of reactive oxygen species (ROS)
for pollutant removal. In this study, a BiVO 4 /BiFeO 3 (BVO/BFO) n-p heterojunction catalyst was obtained via calcination
and wet chemical methods for tetracycline (TC) photo-Fenton removal.
The optimal ratio of BVO:BFO was 0.7:1, which can achieve 70.08% TC
degradation in 30 min ( k = 0.0147 min –1 ), markedly surpassing bare BFO and BVO, and retaining >70% efficiency
after ten cycles. The remarkable improvement of TC removal resulted
from efficient electron–hole (e – /h + ) pair separation by heterojunction in space to regenerate Fe 2+ for H 2 O 2 activation. Furthermore,
two distinct TC degradation pathways induced by h + and • OH were proposed, including dehydroxylation, demethylation,
deamidation, ring opening, and hydroxylation. This study provides
an insight into the acceleration of the Fe 3+ /Fe 2+ cycle and broadens the application of Fenton technology in the field
of environmental remediation.
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Advanced Agrochem
·
2026
·
IF 9.2
Kun Gao,Guantian Li,Wenjie Wang,Kecheng Li,Ronge Xing,Pengcheng Li,Yukun Qin
To explore the potential of utilizing renewable bioresources as sustainable alternatives to fossil-derived chemicals in green pesticide development, N -acetylglucosamine (NAG), the monomer of chitin, was employed as a starting scaffold for structural design, synthesis, and bioactivity evaluation. An efficient room-temperature synthetic route was developed, successfully yielding a series of novel thiourea glycoside conjugates. In vitro screening identified glycoside 3m as the most potent candidate against Fusarium oxysporum , achieving an inhibition rate of 94.4% at 200 μg/mL. Morphological and ultrastructural analyses via SEM and TEM showed that while glycoside 3m induced notable surface distortions in mycelia, the cell wall and membrane remained intact. Further untargeted metabolomics studies suggested that glycoside 3m primarily suppresses fungal growth by perturbing mitochondrial energy metabolic pathways, including glycolysis and the tricarboxylic acid cycle. Capitalizing on this bioenergetic vulnerability, a synergistic formulation combining glycoside 3m with hydrogen peroxide (H 2 O 2 ) was evaluated. The co-application of 100 μg/mL glycoside 3m with 0.3‰ H 2 O 2 achieved a 100.0% inhibition rate in vitro and a 52.9% protective efficacy in vivo . Overall, this study demonstrates the feasibility of developing high-efficiency fungicides from renewable marine biomass, offering a promising and sustainable approach for the management of agricultural pathogenic fungi.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Kai Liu,Ziling Liu,Tuanhui Li,Wasim Afzal Muhammad,Xue Liu,Dongbin Dang,Yan Bai
Developing highly efficient single-atom catalysts (SACs) with optimal active-site utilization remains challenging. In this study, a hollow macroporous-mesoporous catalyst composed of iron single atoms supported on nitrogen-doped carbon (Fe/NC) was synthesized using silica microspheres as a sacrificial template and dopamine hydrochloride as a bifunctional C/N source and iron-anchoring ligand, and applied to the CO 2 cycloaddition reaction. According to the experimental results, the Fe/NC catalyst demonstrates exceptional performance in the cycloaddition reaction of styrene oxide with CO 2 , achieving a high yield of 97.45 ± 0.33% (turnover frequency (TOF) = 38.19 h −1 ), despite having an extremely low iron loading of only 1.36 ± 0.01 wt%. This is attributed not only to the superior intrinsic catalytic activity of the Fe N 4 active sites but also to the hollow mesoporous structure with a high specific surface area, which provides stable metal anchoring sites to effectively suppress iron atom aggregation, promotes continuous release of substrates and CO 2 , enhances product diffusion, and thereby improves catalytic efficiency. In addition, the Fe/NC catalyst demonstrates excellent cycling stability, maintaining a high conversion efficiency of 93.26 ± 0.52% after five consecutive recycling tests while preserving its structural integrity. Moreover, the Fe/NC catalyst exhibits broad substrate compatibility. This work provides a theoretical basis for synthesizing porous C/N materials with single-atom loading to achieve efficient catalytic conversion of carbon dioxide Download: Download high-res image (139KB) Download: Download full-size image
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