JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Dongfeng Sun,Yu Kang,Junwei Wang,Luo Huang,ShuKai Ding,Guohui Dong,Yanning Qu,Yuan Yu
Ammonia synthesis via photocatalytic nitrogen fixation is regarded as a green and sustainable alternative to the conventional Haber-Bosch process. Nevertheless, its practical application is greatly hindered by the chemically inert N N triple bonds and slow reaction kinetics. In this work, a Cu-doped TiO 2 /g-C 3 N 4 composite with a well-defined type-II heterojunction was synthesized through a facile wet-chemical method integrating low-temperature crystallization and in-situ molecular assembly. Characterizations confirm that Cu-TiO 2 nanoparticles are evenly immobilized on g-C 3 N 4 nanosheets, which effectively suppresses nanoparticle aggregation. On the one hand, Cu doping tunes the band structure of TiO 2 and introduces abundant oxygen vacancies, greatly promoting the adsorption and activation of N 2 molecules. On the other hand, the formed type-II heterojunction establishes an internal electric field, which broadens light response and accelerates the separation and migration of photogenerated charge carriers. Benefiting from the synergistic effect of Cu doping, oxygen vacancies and type-II heterojunction, the optimal Cu-TiO 2 /g-C 3 N 4 (CuTCN-2) achieves an outstanding NH 3 evolution rate of 91.14 μmol·g −1 ·h −1 with a quantum yield of 1.75% at 420 nm under simulated solar illumination. The activity is 7.6-, 3.4- and 34.1-fold higher than that of bare TiO 2 , single Cu-TiO 2 and pristine g-C 3 N 4 , respectively. This work reveals that the co-regulation of heteroatom doping, defect engineering and heterojunction construction can remarkably boost photocatalytic kinetics. It also provides a feasible design principle for high-performance photocatalysts toward solar-driven nitrogen fixation.
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PHYSICA B-CONDENSED MATTER
·
2026
·
IF 3.2
Chang Feng,Qian Jing,Li Tang,Jiangping Jing,Ruiling Wang,Zhuoyuan Chen
S-C 3 N 4 /Mg(OH) 2 heterojunction photocatalyst was synthesized via a simple ball-milling method. • S-C 3 N 4 /Mg(OH) 2 exhibited significantly enhanced photocatalytic performance. • S-C 3 N 4 /Mg(OH) 2 demonstrated stable photocatalytic activity in complex ionic environments. • The photocatalytic reaction mechanism of S-C 3 N 4 /Mg(OH) 2 was proposed in this work. This work fabricated a type II 2D/2D S-doped graphitic carbon nitride/magnesium hydroxide (S-C 3 N 4 /Mg(OH) 2 ) heterojunction photocatalyst via a straightforward ball-milling method. The Mg(OH) 2 nanosheets are uniformly dispersed on the surface of S-C 3 N 4 , forming a well-developed heterojunction structure. The S-C 3 N 4 /Mg(OH) 2 composite material was employed as a photocatalyst and exhibited high efficiency in degrading tetracycline and methyl orange in an aqueous environment. The optimized S-C 3 N 4 /Mg(OH) 2 -30 composite demonstrated superior photocatalytic performance, achieving 100% removal of tetracycline within 45 min and 93% degradation of methyl orange within 60 min. Its performance was significantly superior to that of the single-component photocatalysts, and it exhibited stable photocatalytic activity even in complex ionic environments. The formation of Type-II heterojunction between S-C 3 N 4 and Mg(OH) 2 facilitates charge separation/migration and thus significantly enhanced pollutant removal efficiency. The S-C 3 N 4 /Mg(OH) 2 composite material fabricated in this work shows great promise for practical wastewater treatment applications. The S-C 3 N 4 /Mg(OH) 2 heterojunction photocatalyst was successfully fabricated. It not only exhibits outstanding photocatalytic performance in degrading organic pollutants but also maintains stable photocatalytic degradation ability even under complex ionic conditions. Download: Download high-res image (368KB) Download: Download full-size image
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ACS Applied Polymer Materials
·
2026
·
IF 5.2
Xuemei Bai,Ketian Gao,Haijun Miao,Song Hu,Xueya Liu,Mouji Li,Bo Yu,Zhengfeng Ma,Feng Zhou,Wufang Yang
Controllable growth of hydrogel coatings on diverse substrates is highly desirable yet remains challenging due to the lack of universal and straightforward fabrication strategies. Herein, we present a visible-light-activated, surface-catalyzed radical polymerization approach that enables the controllable in situ construction of hydrogel coatings on a broad spectrum of materials. The process initiates with the deposition of a P(DMA-co-MEA)@g-C3N4 adhesive primer layer, which not only establishes robust interfacial anchoring to the substrate but also functions as a photocatalytic initiator under visible-light irradiation. This interfacial activation drives spatially confined polymerization, yielding uniform hydrogel coatings with precisely tunable thickness. The method demonstrates extensive substrate compatibility─including metals, polymers, and inorganic materials─and readily affords programmable surface functionalities through interfacial chemical design to impart antifouling, lubricating, or biocompatible properties. Owing to its universality, strong interfacial adhesion, and operational simplicity, this strategy provides a versatile platform for the functional tailoring of irregular and three-dimensional surfaces and holds substantial potential for applications in surface/interface engineering and biorelated technologies.
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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
·
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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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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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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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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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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FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2018
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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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CHEMICAL ENGINEERING JOURNAL
·
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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ACS Applied Materials & Interfaces
·
2013
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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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MICROCHIMICA ACTA
·
2022
·Vol. 190
·期 1
·1-9
·
IF 6.408
Fan Yunfeng,Liu Zhimin,Wang Jie,Cui Chen,Hu Leqian
A novel electrochemiluminescence (ECL) aptasensor for the determination of lincomycin (LIN) was developed based on CdS QDs/carboxylated g-C 3 N 4 (CdS QDs/C-g-C 3 N 4 ). CdS QDs/C-g-C 3 N 4 served as the substrate of the aptasensor, and then CdS QDs/C-g-C 3 N 4 -modified electrode was incubated with aptamer DNA (Apt-DNA). When the non-specific sites of the electrode surface was blocked by 6-mercaptohexanol, the ferrocene-labeled probe (Fer-DNA) was assembled onto the electrode surface through base complementation with Apt-DNA. In the absence of LIN, the ECL signal was quenched effectively by Fer-DNA and a decreased ECL emission (off state) was acquired. On the contrary, LIN was specifically bond with Apt-DNA, and Fer-DNA was detached from the aptasensor surface because of the deformation of Apt-DNA, resulting in an effectively enhanced ECL signal (on state). The constructed ECL aptasensor exhibited a wide detection range for LIN determination (0.05 ng mL −1 –100 μg mL −1 ) with a low detection limit (0.02 ng mL −1 ). Importantly, the proposed ECL aptasensor showed outstanding accuracy and specificity for LIN determination, and also provided a potential strategy for other antibiotic determinations. Graphical Abstract
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