NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 10
·4122-4128
·
IF 3.288
Feiyuan Sun,Hao Feng,Shilun Gao,Dandan Yang,Huabin Yang
A silicon/antimony/antimony oxide/graphite@amouphous carbon (Si/Sb/Sb2O3/G@C) composite material was prepared successfully via a simple ball milling and high temperature calcination process. Its structural characterization showed that Si and Sb/Sb2O3 were dispersed into the graphite layer and coated with amorphous carbon. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results revealed that Sb2O3 was partly reduced to Sb by carbon, which could improve its electronic conductivity. Besides, Si, Sb, Sb2O3 and carbon have different lithiation/delithiation voltage plateaus, which can act as a mutually buffering matrix, thus improving its electrochemical performance. Due to the high specific capacity, good electronic conductivity and stable cycling performance benefited from the Si/Sb/Sb2O3, Sb/G and G/C, respectively, as well as the mutually buffering matrix of all the active materials, the resulting composite electrode materials exhibit excellent electrochemical performance. The composite material exhibited good cycling performance (a stable reversible delithiation capacity of 567.8 mA h g−1 after 180 cycles), excellent rate capability (∼360 mA h g−1 and 280 mA h g−1 at current densities of 1000 mA g−1 and 2000 mA g−1, respectively) and decreased polarization resistance. This work demonstrates a facile and cost-effective approach to preparing composite materials with complementary advantages for use in high-performance Li-ion batteries.
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Dong Liang,Yaliang Huang,Fan Wu,Junjun Luo,Xinyao Yi,Jianxiu Wang,Xiaoqing Qiu
A relatively simple and bottom-up method has been developed for the preparation of g-C 3 N 4 /TiO 2 nanocomposites with coexposed {001} and {101} facets. Under acid-assisted hydrothermal conditions, the supramolecular preassembly of triazine precursor was resulted from the coordination of melamine with induced cyanuric acid , and synchronized with the large-scale etching of TiO 2 . Consequently, the g-C 3 N 4 /TiO 2 nanocomposites with coexposed {001} and {101} facets have been prepared via the simple heat treatment process . As the sintered precursor, the self-assembled supramolecules serve as a viable means for simultaneously controlling the compact and uniform contact interfaces between g-C 3 N 4 and TiO 2 . As a result, the obtained samples exhibit excellent visible photocatalytic performance for the degradation of organic pollutants and inactivation of Escherichia coli K-12 as compared to pristine g-C 3 N 4 and TiO 2. The reactive O 2 – and photoinduced holes are found to play the major roles in the photocatalytic behavior due to the energy band structure of the materials. Our results suggest that the self-assembled supramolecules can serve as the sintered precursor to prepare a high photocatalytic performance material on the field of water treatment, and pave alternative synthetic method for composites based on conjugated polymers and metallic compound .
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JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Beibei Wang,Jiaqi Pan,Ziyuan Jiang,Zongjun Dong,Chuang Zhao,Jingjing Wang,Changsheng Song,Yingying Zheng,Chaorong Li
A bimetallic iron−nickel sulfide(Fe-Ni-S) modified g-C 3 N 4 nano-heterojunction is synthesized via a simple preparation technique using two-step hydrothermal method . The results of SEM(scanning electron microscopy), EDS(Energy Disperse Spectroscopy), elemental mapping, XRD(X-ray diffraction), TEM(transmission electron microscopy), XPS(X-ray photoelectron spectroscopy) and FT-IR(fourier transform infrared spectroscopy) imply that the Fe-Ni layered double hydroxide(Fe-Ni-LDH) were sulfuretted to Fe-Ni-S nanoparticles and deposited on the surface of the g-C 3 N 4 nanosheets successfully. The photocatalytic hydrogen production activity of the as-prepared Fe-Ni-S/g-C 3 N 4 nano-heterojunction remarkably exhibits an enhancement of 52 times than that of the unmodified g-C 3 N 4 . Furthermore, the mechanism of photocatalytic hydrogen production enhancement has been studied, which could be ascribed to the partial-charge transfer activation of the Fe-Ni-S co-catalyst.
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ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Dandan Yang,Jing Shi,Jinhong Shi,Huabin Yang
A silicon/tin@amorphous carbon-graphite (Si/Sn@C-G) composite material was successfully prepared by a simple high energy ball milling and annealing process , exhibiting excellent electrochemical performance in lithium-ion batteries. Structural characterization showed that the phase separated Si/Sn mixture was coated by amorphous carbon and were highly dispersed into the graphitic sheets. As a result, the Si/Sn@C-G composite exhibited a high initial coulombic efficiency of 81.5% and a stable reversible capacity of 612.6 mAh g −1 even after 100 cycles. Cyclic voltammetry and electrochemical impedance spectroscopy results indicated that the Sn acted as an active matrix and could obviously decrease the polarization resistance (Rp). And the ductile Sn could not only cushion the volumetric deformation of Si, but could also improve the Si dispersion. This work demonstrated a facile approach to synthesize highly stable Si/Sn@C-G composite in lithium-ions batteries.
研究领域:
材料科学
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储能
·
电化学
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纳米复合材料
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电池技术
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高影响因子
ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Jiye Zhang,Yonghao Wang,Jian Jin,Jun Zhang,Zhang Lin,Feng Huang,Jiaguo Yu
CdS/g-C3N4 core/shell nanowires with different g-C3N4 contents were fabricated by a combined solvothermal and chemisorption method and characterized by X-ray powder diffraction, scanning electronic microscopy, transmission electron microscopy, and UV–vis diffuse reflection spectroscopy. The photocatalytic hydrogen-production activities of these samples were evaluated using Na2S and Na2SO3 as sacrificial reagents in water under visible-light illumination (λ ≥ 420 nm). The results show that after a spontaneous adsorption process g-C3N4 is successfully coated on CdS nanowires with intimate contact and can significantly improve the photocatalytic hydrogen-production rate of CdS nanowires, which reaches an optimal value of up to 4152 μmol h–1 g–1 at the g-C3N4 content of 2 wt %. More importantly, g-C3N4 coating can substantially reinforce the photostability of CdS nanowires even in a nonsacrificial system. The synergic effect between g-C3N4 and CdS, which can effectively accelerate the charge separation and transfer corrosive holes from CdS to robust C3N4, was proposed to be responsible for the enhancement of the photocatalytic activity and photostability. The possible conditions necessary for the synergic effect to work in a CdS/g-C3N4 core/shell configuration is also discussed.
研究领域:
材料科学
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光催化
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可再生能源
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纳米技术
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氢气制备
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.9
Qiongmiao He,Xing Cao,Shichang Sun,Qinhao Zhong,Rui Wang,Yaofeng Zhu,Rui Ma
Photocatalytic dissolution represents a promising alternative to conventional, highly toxic, and energy-intensive palladium (Pd) recovery technologies. However, achieving efficient recovery under visible-light illumination in aqueous solution remains a challenge. Herein, we constructed a visible-light-responsive heterojunction photocatalyst by in-situ growing BiOBr nanosheets on nanostructured g-C 3 N 4 . Under simulated sunlight irradiation (AM 1.5G, 100 mW/cm 2 ), the optimized BiOBr/g-C 3 N 4 achieved 88 % Pd dissolution from waste palladium/carbon catalyst (w-Pd/C) within 3 h, outperforming single-component catalysts. Free radical trapping experiments and electron spin resonance (ESR) analysis revealed that efficient separation and migration of photogenerated charge carriers at the heterojunction interface generated abundant reactive species. The photogenerated e − reacted with O 2 to produce •O 2 − , while h + reacted with H 2 O to generate •OH. Simultaneously, Br − was oxidized by h + and •O 2 − to form bromine radicals (•Br), which then combined to form Br 2 . These reactive species (•O 2 − , •OH, and Br 2 ) accumulated on the w-Pd/C surface and collectively promoted the oxidative dissolution of Pd. This study highlights the potential of combining heterojunction engineering with halogen coordination in sustainable metal recovery, providing novel insights and technical support for the green recovery of precious metals, with significant implications for environmental protection and resource cycling.
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REACTIVE & FUNCTIONAL POLYMERS
·
2026
·
IF 5.1
Jingjing An,Rui Wang,Jianfeng Wang,Yanyu Yang,Wanjie Wang,Yanxia Cao
In this study, recycled poly(vinyl butyral) (r-PVB) and maleic anhydride grafted poly(ethylene-octene) (POE-g-MA) were employed to synergistically toughen polypropylene (PP) via one-step reactive melt blending. Results revealed that hydroxyl groups of r-PVB reacted with anhydride groups of POE-g-MA at the interface, generating in situ compatibilizers and significantly improving interfacial adhesion. Although thermodynamic predictions suggested that POE-g-MA should encapsulate r-PVB, the actual morphology was dominated by viscosity-driven kinetics, leading to the formation of a unique core-shell structure with r-PVB as the shell and POE-g-MA as the core. This morphology effectively promoted energy dissipation, enabling the PP/r-PVB/POE-g-MA (70/10/20) blend to achieve a notched impact strength of 78.0 kJ/m 2 , which is 16.6 times higher than that of neat PP, thus realizing super-toughening. This work not only provides a new pathway for value-added recycling of r-PVB but also reveals a kinetic-dominated mechanism of phase morphology in reactive multicomponent blends.
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MICROCHEMICAL JOURNAL
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2026
·
IF 5.1
Zhengrong Lu,Qiming Chen,Yuanlong Hu,Tiantian Tang,Minahil Hayat,Peng Liu,Zhanmin Liu
Cadmium ion (Cd 2+ ) is a highly toxic heavy metal ion that poses serious risks to environmental safety and human health. Its accumulation through food chains and drinking water can result in renal dysfunction, neurological damage, and carcinogenic effects. Therefore, the development of simple, sensitive, and field-deployable detection methods for Cd 2+ is of great importance. In this study, a novel approach was employed using graphene oxide–systematic evolution of ligands by exponential enrichment (GO-SELEX) to screen aptamer specific to Cd 2+ . The method reduced the screening time by 30%–50% compared with conventional SELEX methods. The selected aptamer was subsequently integrated with catalytic hairpin assembly (CHA) and a G-quadruplex DNAzyme to construct a colorimetric biosensor for Cd 2+ detection. Signal transduction was achieved via the peroxidase-like catalytic oxidation of ABTS in the presence of hydrogen peroxide, enabling visual and spectrophotometric readout without the need for complex instrumentation or sample pretreatment. Under optimized conditions, the biosensor exhibited a linear detection range from 0.1 to 20 μM with a detection limit of 57 nM. The assay demonstrated excellent selectivity toward Cd 2+ over other common metal ions and satisfactory performance in spiked environmental water samples. The findings of the study demonstrate that the proposed biosensor provided a cost-effective and practical platform for on-site monitoring of Cd 2+ . It holds strong potential for real-world applications, such as assessments of water quality at riverbanks or evaluations of industrial effluents, offering a seamless transition from laboratory research to field deployment.
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Small
·
2026
·
IF 11.8
Kunge Hou,Ran Sun,Longbo Chang,Guocheng Liu,Xingang Liu,Jianyuan Hou,Renxi Zhang
Photocatalytic hydrogen peroxide (H 2 O 2 ) production has traditionally been dominated by a single reaction pathway, namely the oxygen reduction reaction (ORR). However, this approach is limited by low efficiency and a dependence on sacrificial agents. In this study, we introduce a pioneering radiofrequency plasma-assisted strategy for constructing an S-scheme heterojunction composed of g-C 3 N 4 and a triazine-based covalent organic framework (COF). This novel heterostructure enables simultaneous dual-channel H 2 O 2 generation via both the ORR and water oxidation reaction (WOR) under visible light without sacrificial reagents. The optimized composite, gTD-30, achieves a remarkable H 2 O 2 production rate of 2017 µmol g −1 h −1 in pure water, thus surpassing the performance of the individual components g-C 3 N 4 and TaPPY-DHTA (TD)-COF by 10.9 and 3.6 times, respectively. This composite also exhibited outstanding stability over multiple cycles in diverse aqueous environments. Using advanced characterization techniques and theoretical modelling, we demonstrated that plasma treatment not only enhanced the interfacial contact but also induced a strong internal electric field and band alignment, thereby unlocking exceptional charge separation and redox capability. This study establishes a new paradigm for photocatalytic H 2 O 2 synthesis by merging dual-reaction engineering with interface-specific plasma modification and opens a scalable route toward efficient solar-driven oxidant production.
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PubMed
高影响因子
ACS ES&T Engineering
·
2026
·
IF 6.3
Yao Chen,Tianle Hu,Jianwei Ai,Quansheng Zhou,Xinyi Su,Yuchen Zhang,Hanchen Zhang,Shuhui Guan,Zhenfeng Bian,Hiromi Yamashita
Photocatalytic dissolution of precious metals (PMs) relies critically on the generation of specific reactive intermediates; however, the rational control of radical species in visible light remains challenging. Herein, we introduced the cyano (−CN) group into g-C3N4 (denoted as g-C3N4–CN), achieving a remarkable enhancement in the dissolution efficiency of precious metals under visible light. The −CN group not only promotes the visible-light absorption of g-C3N4–CN, but also facilitates the separation of photogenerated charges. The electron paramagnetic resonance (EPR) spectroscopy further demonstrates that g-C3N4–CN instantaneously generates superoxide radicals (O2•–) via efficient oxygen reduction while simultaneously promoting the rapid production of alkyl radicals (R•) through solvent oxidation. In contrast, pristine g-C3N4 exhibits a sluggish generation of all radical species. The distinct radical generation kinetics of g-C3N4–CN is identified as the key driver for its superior dissolution efficiency, enabling precious-metal recovery rates by 2–4 times and establishing a radical-targeted strategy for sustainable photocatalysis.
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BIOORGANIC CHEMISTRY
·
2025
·
IF 4.7
Shuaishuai Cui,Zhaoyang Jin,Xuyang Ma,Dao Lin,Xiangjun Li,Yujian He,Li Wu
The G-quadruplex (G4) DNA structures are a noncanonical nucleic acid secondary structure involved in numerous fundamental biological processes, including replication and transcription. Accordingly, regulating the folding/unfolding of G-quadruplexes in genes is important for understanding the studies of G4-associated biological processes. Here, we propose a reduction-sensitive G4 binder for regulation of replication and transcription of G4-containing DNA, thereby enabling specific control over G4-associated biological processes. Biophysical studies, combined with molecular dynamics simulations, displays the reduction-sensitive azobenzene ligands target binding to G4 structure in template DNA, while dissociate the G4 structure by the reductive cleavage of the ligand. In vitro polymerase assays revealed that azobenzene ligands stalled the replication and transcription of template DNA at G4, and the inhibitory effects were significantly weakened on polymerase processivity with incubation of ligands at high concentration of GSH. Finally, we integrated the G4-forming sequence and G4-negative control into a synthetic reporter gene, respectively. We observed effective suppression in expression of G4-containing gene by adding the ligands compared to the corresponding G4-negative control in a way, and effective restoration of gene expression induced by their reductive states of ligands. Our findings highlight the potential of endogenous-responsive G4 binders in advancing specific regulation of biological process in a G4-dependent manner, but may also represent a promising strategy as a future therapeutic modality.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zujiang Liu,Xuehua Yuan,Tianhao Chen,Chongqing Yu,Luyan Xiong,Zhixuan Zeng,Zeyu Pan,Gnanasekar Sathishkumar,Jing Li,Jin Ye,En-Tang Kang,Liqun Xu,Xi Rao
The escalating levels of indoor bacterial contamination and air pollution considerably threaten public health. In this work, we synthesized a three-dimensional flower-like TiO 2 /g-C 3 N 4 nano-powder with a Z-scheme heterojunction structure, which demonstrated superior photocatalytic performance and efficient free radical generation capability, enabling effective mitigation of bacterial pathogens and indoor volatile organic compounds under low-power light irradiation. The material achieved 100% degradation of formaldehyde within 40 minutes under 420 nm LED irradiation. Antibacterial tests showed a 100% inactivation rate for S. aureus within 60 minutes and complete elimination of E. coli within 40 minutes. Characterizations and DFT calculations had confirmed the establishment of the Z-scheme heterojunction, which significantly decreased the band gap and improves the absorption of visible light. Concurrently, the efficient separation of charge carriers and the transfer of electrons facilitated the production of reactive oxygen species. In conclusion, this research presents a novel and environmentally sustainable approach to developing high-performance photocatalysts for applications in indoor environment improvement.
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