JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Jiale Ni,Zicheng Yang,Binxuan Hong,Yi Feng,Jianfeng Yao
This research endeavors to optimize the morphology and edge defects of g-C 3 N 4 through straightforward pyrolysis of rationally chosen precursors, with the objective of increasing the CO 2 conversion efficiency. Our findings reveal that employing melamine and urea as precursors yields tubular g-C 3 N 4 (CN tube), featuring an increased surface area and a greater density of edge defects than melamine-derived bulk g-C 3 N 4 and urea-derived layered g-C 3 N 4 . As a result, the obtained CN tube can deliver an impressive yield of 98 % for CO 2 cycloaddition with epichlorohydrin at 12 h under mild conditions of 80 °C and 0.1 MPa CO 2 pressure, significantly outperforming those derived from melamine (53 %) or urea (66 %) alone. This investigation demonstrated the pivotal role of a tubular architecture and enriched edge defects in facilitating the thermally driven CO 2 fixation process to produce cyclic carbonates.
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APPLIED SURFACE SCIENCE
·
2025
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IF 6.9
Cheng Yang,Xinyue Yang,LiXun Feng,ZiJian Chen,Jia He,HuiTing Sui,Huajun Sun
Piezoelectric photocatalysis is emerging as a promising approach for green environmental protection. Herein, a molybdenum disulfide/graphitic carbon nitride S-scheme heterojunction catalyst achieved a Rhodamine B degradation rate exceeding 99 % within 30 min under the synergistic effects of light and ultrasound, along with a hydrogen (H 2 ) production rate of 16.2 mmol g −1 h −1 . The synergy of ultrasound and light improved catalytic efficiency by approximately 45 % compared with light alone. Experimental characterizations, including Kelvin probe force microscopy, in situ X-ray photoelectron spectroscopy, and density functional theory calculations, confirmed the presence of dual built-in electric fields arising from band alignment and strain-induced polarization. These fields facilitated efficient electron–hole separation, thereby greatly enhancing the overall piezoelectric photocatalytic performance and resulting in efficient use of mechanical and solar energy for H 2 production and pollutant decomposition.
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BMC Chemistry
·
2025
·Vol. 19
·期 1
·1-15
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IF 4.6
Lei Ying,Bao Qijing,Lin Feng,Zhang Jian,Zhang Yanji,Wu Yuechao,Lv Liang,Ding Liyong
Graphite carbon nitride (g-C 3 N 4 ) has emerged as a promising photocatalyst for visible-light-driven applications due to its suitable band structure. However, the rapid recombination of photogenerated electron-hole pairs in bulk g-C 3 N 4 significantly hinders its photocatalytic efficiency. In this study, we report the fabrication of a ternary g-C 3 N 4 /MoS 2 /rGO (CMG) nanocomposite via in situ photoreduction-induced exfoliation. The introduction of MoS 2 and rGO not only facilitates the exfoliation of g-C 3 N 4 into ultrathin nanosheet, thereby exposing more active sites, but also enables the formation of tightly coupled heterojunctions that promote charge separation and transfer. Photoluminescence (PL) analyses confirm the suppressed recombination of charge carriers, indicative of enhanced charge dynamics within the heterojunction between MoS 2 , rGO and g-C 3 N 4 . Among the synthesized materials, the optimized CMG-175 composite exhibits remarkable photocatalytic activity, achieving a 95.7% degradation rate of Rhodamine B (RhB) within 30 min under visible light irradiation, which is 23.6-fold enhancement compared to pristine g-C 3 N 4 . Mechanistic studies reveal that photogenerated holes and superoxide radicals are the predominant reactive species driving the degradation process. This work highlights a rational design strategy for constructing high-performance g-C 3 N 4 -based heterojunction photocatalysts and provides valuable insight into the synergistic interactions among MoS 2 , rGO, and g-C 3 N 4 for efficient organic pollutant removal.
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Sensing and Bio-Sensing Research
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2025
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IF 4.9
Jianjun Kang,Xue Lin,Chen Lin,Wuyuan Pan,Jian Wang,Fang Ke
Levodopa (L-DOPA) is a crucial neurotransmitter utilized in the treatment of neurological disorders, particularly in Parkinson's disease, where its concentration in biological fluids serves as a key diagnostic marker. Despite its significance, current methods for L-DOPA detection often suffer from limitations such as prolonged detection times, low sensitivity and weak anti-interference. This study addresses these challenges by introducing a highly efficient and colorimetric sensor for the rapid detection of L-DOPA, utilizing manganese-doped graphitic carbon nitride (Mn-g-C 3 N 4 ) as a peroxidase-mimetic catalyst. The sensor employs 3,3′,5,5′-tetramethylbenzidine as a substrate and achieves detection within 20 s, with a linear response over the concentration ranges of 1–10 μM and 20–90 μM, and the detection limits were 0.049 μM and 0.51 μM, respectively. The method has good specificity for L-DOPA and has been successfully applied to human serum even in the presence of interference from dopamine and other amino acids. In addition, the sensor exhibits satisfactory performance in smartphone-based L-DOPA detection. The novel sensor platform offers a simple, cost-effective, and scalable solution for real-time L-DOPA monitoring, with significant potential for applications in both clinical and environmental contexts.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2025
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IF 4.6
Yuxin Ma,Xue Zhan,Yiqing Han,Wenjie Cui,Xue Ye,Jie Li
The photocatalytic oxidation of formaldehyde (HCHO) to CO 2 and H 2 O is a key method for the green degradation of gaseous HCHO. Graphitic carbon nitride (g-C 3 N 4 ) is widely studied for its stability, non-toxicity, and low cost, but its small specific surface area often leads to electron-hole recombination, limiting its photocatalytic efficiency. This study addresses this by preparing K-doped g-C 3 N 4 via thermal polymerization and synthesising a flower-like spherical BiOBr/Bi 2 WO 6 /2K-g-C 3 N 4 ternary heterojunction catalyst using hydrothermal and hydrolytic precipitation methods. The catalyst demonstrated a 96.00 % photocatalytic degradation efficiency for gaseous HCHO within 5 h, reaching 90.67 % at just 2 h, highlighting its superior charge separation capability. Characterization revealed that the flower-like morphology enhances light absorption by exposing more active sites, while the K-doped g-C 3 N 4 forms a double Z-scheme heterojunction with BiOBr/Bi 2 WO 6 , effectively separating and retaining photogenerated electrons and holes. This structure significantly boosts the catalyst's redox capacity, thereby improving its photocatalytic performance for HCHO degradation.
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CARBOHYDRATE POLYMERS
·
2012
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IF 3.628
Ke Zhang,Pengyu Zhuang,Zhengke Wang,Youliang Li,Zhiqiang Jiang,Qiaoling Hu,Minying Liu,Qingxiang Zhao
For the development of biocompatible and degradable biomaterials, a kind of well-defined graft copolymer consisting of chitosan back-bone and amphiphilic PEO-PLLA-PEO branch chains was synthesized by Cu(0) catalyzed one-pot strategy combining “click” chemistry and single electron transfer-nitroxide radical coupling (SET-NRC) reaction. First, the precursors of 6-azide- N -phthaloyl-chitosan, TEMPO-PEO-alkyne and mPEO-PLLA-Br were designed and produced. Then, the one-pot coupling reactions between these precursors were performed in the presence of nanosized Cu and PMDETA. The efficiencies of the coupling reactions were greater than 90% determined by the FTIR and ESR spectra. The structure of graft copolymer with 43% of the grafting ratio was confirmed by the spectral analysis. This work provided a route to prepare chitosan graft copolymer.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Peng Liu,Furong Ye,Changcun Han,Chenxi Gao,Huai Yang,Xupeng Chen,Yizhong Huang
Photocatalytic water splitting for green H 2 offers a renewable-energy route, yet efficiency is still limited by poor charge separation and slow reaction kinetics. Here, we report a 2D/2D Ti 3 CN/g-C 3 N 4 heterojunction with a built-in electric field, synthesized via Lewis acid molten-salt etching and electrostatic self-assembly. The heterojunction promotes directional electron transfer from g-C 3 N 4 to Ti 3 CN, while Ru nanoparticles further enhance charge density and reduce the reaction barrier. The optimized Ru/Ti 3 CN/g-C 3 N 4 photocatalyst delivers a H 2 evolution rate of 4254 μmol g −1 ·h −1 under visible light, 200 times higher than pristine g-C₃N₄, with excellent cycling stability. Experimental and theoretical analyses reveal that the synergistic effects of the polarized interface and Ru cocatalyst significantly improve charge separation and H 2 adsorption kinetics. This work offering a practical route to couple MXene co-catalysts with polarization-induced built-in electric fields for markedly accelerating solar-driven H 2 production.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 8.3
Baker Rhimi,Attiq Ur Rehman,Yuanzhi Hu,Sherif A. El-Khodary,Zhehao Liu,Min Zhou,Karim Harrath,Qiang Ma,Long Zhao,Zhifeng Jiang,Weidong Shi
The development of efficient and stable photocatalysts for hydrogen evolution is crucial for solar-to-fuel conversion. Here, we report Cu-porphyrin (CuTCPP)/oxygen-doped g-C 3 N 4 (O–CN) nanohybrids as high-performance sonophotocatalysts, where strong π–π stacking interactions create robust heterojunctions that promote efficient charge separation and transfer. The optimal 2 % CuTCPP/O–CN2 sample exhibited a 3.3-fold enhancement in H 2 evolution compared to O–CN2 under simulated light coupled with ultrasonication. Experimental results combined with density functional theory (DFT) calculations confirmed the suppression of charge recombination and highlighted the synergistic contribution of ultrasonic excitation with light irradiation. Furthermore, oxygen doping was found to not only reinforce the CuTCPP/O–CN interface but also provides robust anchoring sites for Pt cocatalysts, preventing leaching and aggregation while electronically modulating Pt to optimize its d-band center and H 2 adsorption free energy. These findings provide valuable insights into the rational design of stable and high-active hybrid photocatalysts for solar fuel generation.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 3
·126
·
IF 5.4
Zhou Yu,Wu Runqiang,Fan Lingling,Qui Pengtao,Deng Xiaohua,Tan Xiaohong,Dong Shuaikang,Li Canru,Chen Jiejing,Liang Jintao,Li Guiyin
Hepatocellular carcinoma (HCC) is one of the most lethal malignancies worldwide, and early diagnosis is crucial. Golgi protein 73 (GP73) has emerged as a promising serum biomarker for HCC. However, current detection methods often fail to meet routine screening requirements due to limitations in sensitivity and operational simplicity. To address these challenges, we have developed a novel fluorescent aptamer-based sensor for highly sensitive GP73 detection based on the fluorescence resonance energy transfer (FRET) mechanism between graphitic carbon nitride quantum dots (g-CNQDs) and a copper-based metal–organic framework (Cu-TCPP). g-CNQDs were covalently conjugated with a GP73-specific aptamer to serve as the fluorescent donor, while two-dimensional Cu-TCPP nanosheets acted as the efficient acceptors. Fluorescence was quenched upon donor–acceptor interaction via FRET. In the presence of GP73, aptamer–target binding disrupted FRET interaction, separating the donor from the acceptor and restoring fluorescence in a concentration-dependent manner. Under optimal conditions, the sensor exhibited excellent linearity over a concentration range 1.0–225.0 ng mL⁻¹, with a detection limit as low as 0.907 ng mL⁻¹. Recoveries for spiked human serum samples ranged from 95.96% to 103.85%, with relative standard deviations (RSDs) of 0.38%–5.48%. The developed aptamer sensor demonstrated excellent sensitivity, selectivity, and stability, providing a powerful tool for early HCC diagnosis and offering strong potential for real-time analytical applications. Graphical A novel fluorescent aptamer sensor for GP73 detection by leveraging the fluorescence resonance energy transfer (FRET) mechanism between graphite-phase carbon nitride quantum dots (g-CNQDs) and a copper-based organic framework (Cu-TCPP). This platform achieved a good linear relationship with GP73 concentration in the range of 1.0–225.0 ng mL -1 for GP73 concentration, and a detection limit of 0.907 ng mL -1 .
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Materials Today Chemistry
·
2026
·
IF 6.7
Xingyu Xia,Chuhan Zhou,Siying Li,Siyu Jian,Siyu Li,Xingyu Sun,Yiting Xiao,Dan Qian,Fan Yang,Lina Wang,Xiaole Tao,Xuehui Gao,Wenjun Yan,Meiqiang Fan,Lijing Yan,Yan Lu,Shangfu Liao,Min Ling,Bin Wang,Chengdu Liang
Silicon-based anodes are expected to significantly enhance the energy density of lithium-ion batteries due to their high theoretical capacity. However, repeated fragmentation and reconstruction of the SEI layer, driven by substantial mechanical stress, have considerably constrained its practical application. To dissipate the substantial mechanical stress, we introduce a flexible lamellar material (g-C 3 N 4 ). The flexible g-C 3 N 4 effectively dissipates the substantial mechanical stress induced by significant volume expansion between SiC particles, thereby significantly improving the mechanical strength of the SiC electrode, maintaining its structure, and promoting the formation of a mechanically robust, highly ion-conductive SEI layer. AFM test demonstrates that the introduction of g-C 3 N 4 effectively dissipates the substantial mechanical stress. Specifically, compared to the SiC electrode (8.8 keV), the SiC@5 % g-C 3 N 4 electrode (4.0 keV) exhibits considerably lower energy dissipation.
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Green Energy & Environment
·
2026
·
IF 14.6
Chunxia Wang,Yanxin Sun,Zhuo Wang,Yifeng Zeng,Qin-Yi Li,Xinchen Kang,Guoyong Huang
Copper (Cu) doping modifies the band structure of TiO 2 by slightly narrowing the bandgap and shifting the Fermi level, while creating localized states that serve as temporary electron reservoirs to suppress carriers rapid recombination. On this basis, a ternary heterojunction Cu-TiO 2 /g-C 3 N 4 (Cu-CT) was constructed by anchoring Cu-TiO 2 onto g-C 3 N 4 nanosheets. The synergistic interaction between Cu-doping and the S-scheme interfacial configuration generates an internal electric field that promotes vectorial carrier migration, enabling electrons in the conduction band of Cu-TiO 2 and holes in the valence band of g-C 3 N 4 . This spatial separation preserves strong redox potentials and markedly suppresses recombination. Consequently, Cu-CT achieves a hydrogen evolution rate of 10.21 mmol g -1 h -1 , more than twenty times higher than pristine TiO 2 . In-situ XPS, KPFM, and DFT analyses collectively validate the S-scheme charge-transfer pathway and highlight the synergistic role of Cu doping with heterojunction engineering, providing mechanistic insights to the rational design of advanced ternary photocatalysts for efficient solar-driven hydrogen production.
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FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2018
·
IF 1.011
Xingfeng Zhang,Qiujie Wu,Zhongyi Du,Yanmei Zheng,Qingbiao Li
The g-C3N4-Pt photocatalyst was successfully prepared by the combination of a biosynthesis method and sol deposition, which were used for hydrogen evolution from water splitting. The layers of g-C3N4 are thinned and the Pt nanoparticles simultaneously become tightly bound to g-C3N4 by secondary calcination in the process of synthesizing the g-C3N4-Pt photocatalyst. Analysis of the morphological structure and instrumental characterization of the optical performance revealed that the Pt nanoparticles were successfully loaded and well dispersed on the surface of g-C3N4. Furthermore, the absorption wavelength range of the g-C3N4-Pt photocatalyst in visible light was widened and the absorption increased. The activity and photostability of the g-C3N4-Pt photocatalyst for hydrogen evolution under visible light irradiation (λ≥420 nm) were excellent. The rate of H2 evolution reached 582.4 μmol h−1 g−1, and the quantum efficiency (QE) reached 2.70% at 420 nm.
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