ENERGY
·
2025
·
IF 9.4
Jing Fan,Liang Guo,Nan He,Fenhong Song
Utilizing solar energy for photocatalytic hydrogen production provides a promising pathway for sustainable energy conversion. However, the traditional photocatalyst has the defects of excessive charge recombination speed and poor stability. In this work, a series of Si-Sn 3 O 4 /g-C 3 N 4 heterojunction catalysts were synthesized via a facile ultrasonic-assisted thermal treatment method. The optimized Si-Sn 3 O 4 -5/CN composite exhibited a remarkable hydrogen evolution rate of 5295 μmol∙g −1 h −1 under visible light, which is 2.21 and 54 times higher than that of pure g-C 3 N 4 and Si-Sn 3 O 4 , respectively. Extensive characterization (XPS, PL, EIS, etc.) confirmed the formation of a Type-II heterojunction, which significantly promotes charge separation and transfer. Furthermore, the composite demonstrated excellent photocatalytic stability over four consecutive cycles. This work offers an efficient and stable photocatalyst system for solar-driven hydrogen production and sheds light on the design of heterostructured photocatalysts.
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高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-16
·
IF 3.9
Dong Yuqi,Qiao Qing-an,Wang Ruping,Yang Yueyue,Cai Honglan,Gao Hongwei
Environmental pollution caused by industrial waste is an increasing concern, and the design and development of efficient photocatalysts offer promising approaches to address this issue. A series of novel Zn 0.6 Cd 0.4 S/ZnO/g-C 3 N 4 composites were prepared through a calcination‒hydrothermal method. Under visible light, these materials demonstrated exceptional performance in the photodegradation of methylene blue (MB), rhodamine B (RhB), and tetracycline (TC). Among the composite materials, Z 0.6 C 0.4 S/ZnO/CN-35% exhibited the highest degradation efficiencies for MB (98.52%), RhB (99.45%), and TC (98.20%), demonstrating excellent reusability as well. The photocatalytic performance of the catalysts was assessed across various water sources and different pH conditions. The findings revealed that the degradation efficiency for contaminants in seawater, lake water, and tap water closely mirrored that observed in deionized water, suggesting wide adaptability among different aqueous solutions. The exceptional photocatalytic performance of the composite materials can be attributed primarily to the efficient separation and migration of holes (h + ) and electrons (e − ) via well-contacted interfaces. Free radical capture experiments confirmed that hydroxyl radicals (·OH) and superoxide ion radicals (·O 2 - ) play crucial roles in the reaction process. The photocatalytic mechanism was also revealed via density functional theory (DFT) calculations. This work introduced an innovative strategy to design and fabricate novel photocatalysts, emphasizing their extensive applications from both theoretical and experimental aspects.
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PubMed
高影响因子
FUEL
·
2025
·
IF 7.5
Jing Fan,Yanan Yang,Jie Liu,Qi Qi,Fenhong Song
In light of the energy and environmental crises humanity faces, photocatalytic hydrogen production has emerged as one of the effective solutions. Nevertheless, the development of high-performance, low-energy-consumption, and long-lasting stable photocatalysts remains extremely urgent. In this study, a NiS-Mn 2 SnS 4 /g-C 3 N 4 composite with efficient photocatalytic hydrogen evolution performance is synthesized via a simple physical mixing method and calcination process. The introduction of NiS and Mn 2 SnS 4 significantly increases the specific surface area of the g-C 3 N 4 composite, and a dual Type-II heterojunction capable of efficiently separating electron-hole pairs is formed between the components and g-C 3 N 4 . Under 300 W xenon lamp irradiation, the NiS-Mn 2 SnS 4 /g-C 3 N 4 composite achieves a hydrogen evolution rate of 7672.45 μmol·g −1 ·h −1 , corresponding to 3.76, 59.74, and 254.64 times enhancements compared to bare g-C 3 N 4 , NiS, and Mn 2 SnS 4 , respectively. After four cycles, the hydrogen production of NiS-Mn 2 SnS 4 /g-C 3 N 4 still reaches 91 % of the rate in the first cycle. Photoelectrochemical property characterization demonstrates that the composite samples can generate more active sites, reduce the overpotential for H 2 evolution, and enhance light absorption efficiency. Combined with density functional theory (DFT) calculations and band structure analysis, it is confirmed that a strong electronic coupling effect exists among NiS, Mn 2 SnS 4 , and g-C 3 N 4 , and the electron transfer follows a Type-II pathway. This study provides important references and insights for constructing high-activity and high-specific-surface-area g-C 3 N 4 -based photocatalysts.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Tingting Yu,Qingsong Liu,Guang Chen,Lifen Liu,Jinlong Zhang,Changfei Gao,Tao Yang
A novel heterostructure of g-C 3 N 4 /ZnO/Bi 4 O 5 Br 2 (ZB-3) was designed, and used in the microbial coupled photocatalytic fuel cell (MPFC). It can effectively improve electron utilization efficiency and pollutant degradation using this double Z-scheme heterojunction structure . The current–time ( I – t ) curves demonstrated that the current density of ZB-3 was higher than that of ZnO, ZnO/Bi 4 O 5 Br 2 (ZB-1), g-C 3 N 4 /ZnO (ZB-2). Electrochemical impedance spectroscopy (EIS) indicated ZB-3 possessed the minimum charge-transfer resistance. This MPFC for degrading rhodamine B (RhB) and tetracycline (TC) under different conditions were developed using these materials. Even in the dark condition, MPFC with g-C 3 N 4 /ZnO/Bi 4 O 5 Br 2 demonstrated 93% and 82% degradation efficiency for RhB and TC, respectively. Furthermore, the electron transport mechanism of the MPFC and ZB-3 were proposed. It paves the approach for more efficient pollutant degradation via MFC photocatalysis .
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高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 32
·19173-19186
·
IF 10.733
Xiaoming Liu,Xueya Chen,Yizu Li,Bingquan Wu,Xubiao Luo,Sheng Ouyang,Shenglian Luo,Abdulaziz A. Al Kheraif,Jun Lin
Here, we demonstrate a g-C3N4@Au@SrAl2O4:Eu2+,Dy3+ composite as a novel efficient self-luminous visible-light plasmonic photocatalyst for photocatalytic degradation of organic pollutants and hydrogen evolution from water around the clock. The g-C3N4@Au@SrAl2O4:Eu2+,Dy3+ composite was prepared by integrating a g-C3N4@Au plasmonic photocatalyst composite with a SrAl2O4:Eu2+,Dy3+ long-afterglow phosphor through a simple Pechini-type sol–gel method followed by a mechanical mixing and high-temperature calcination process. Owing to the synergistic effect of surface plasmon resonance of the Au nanoparticles in g-C3N4 and long-lasting phosphorescence of the SrAl2O4:Eu2+,Dy3+ phosphor, the prepared g-C3N4@Au@SrAl2O4:Eu2+,Dy3+ composite shows a continuous and efficient photocatalytic activity for photocatalytic degradation of organic pollutants and hydrogen evolution from water in a sunless environment. The current research study could provide a new strategy for designing a highly efficient composite photocatalyst for solar environmental purification and hydrogen energy production around the clock.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jiajing Zhang,Yongjie Zheng,Heshan Zheng
Adjusting the desired structure and heterojunction interface of photocatalytic materials using a facile and efficient strategy is still challenging. In this study, a novel two-dimensional/three-dimensional (2D/3D) oxygen-doped g-C 3 N 4 /BiOI heterostructure nano-sphere (O-g-C 3 N 4 /BiOI) was successfully prepared by a facile solvothermal method for the degradation of nondye organic contaminants. Its composition , morphological characteristics, chemical structure and electrochemical properties have been measured. The result shows the introduction of oxygen doping (O-doping) causes a new defect energy level, extends the light absorption range, and the formation of heterojunction enables the effective separation of photo-generated carriers. Under visible light irradiation, the optimum ratio of O-g-C 3 N 4 /BiOI (2:1) exhibited 100% removal efficiency of bisphenol A within 80 min, which was about 9.1, 2.33, 3.45, and 1.6 times that of pure g-C 3 N 4 , O-g-C 3 N 4 , BiOI, and O-doped-poor heterostructure, respectively. Based on the identified intermediates, the photocatalytic mechanism of O-doped O-g-C 3 N 4 /BiOI (2:1) was also revealed. This finding suggested that the synergistic effect between 2D/3D heterojunction and O-doped greatly promoted visible light photoabsorption and photoinduced carrier separation efficiency with a prolonged lifetime, which was confirmed by multiple optical and electrochemical analyses . This study could bring new opportunities for the rational design of highly efficient photocatalysts by combining 2D/3D heterojunctions with O-doped in environmental remediation.
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高影响因子
Journal of Future Foods
·
2026
·
IF 7.2
Xiaobo Zhang,Zekun Long,Wei Wang,Yafeng Jiang,Qiuyue Zheng,Jijuan Cao
Aflatoxin B1 (AFB1), the most toxic mycotoxin among aflatoxin family, which presents a risk to food safety and human health at a trace level. Herein, the self-enhanced electrochemiluminescence (ECL) emitters of Au nanoclusters-anchored g-C 3 N 4 nanosheet (Au NCs@g-C 3 N 4 ) were synthesized, in which the Au NCs as a co-reaction accelerator enhanced the ECL stability and intensity. Integrating with CRISPR/Cas12a system, the Au NCs@g-C 3 N 4 behaved as sensing substrate to construct a “off-on” switch-type ECL sensor for AFB1 detection based on ECL resonance energy transfer (ECL-RET). The presence of targets AFB1 can specifically bind its aptamer to trigger the release of the activator. Using dual aptamer-regulated activation of CRISPR-Cas12a, AFB1 can be quantified via the ECL sensor, displaying a wide detection range from 0.2 pg/mL-100 ng/mL and a detection limit of 0.08 pg/mL. Furthermore, good practicability was verified in real samples assay, providing an efficient tool for the early warning of AFB1 pollution.
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高影响因子
Coatings
·
2026
·Vol. 16
·期 1
·138
·
IF 2.8
Hadja Kaka Abanchime Zenaba,Mi Long,Xue Liu,Mengying Xu,Wen Luo,Tian Zhang
Developing efficient heterojunction photocatalysts is essential to address the challenge of degrading persistent organic pollutants. In this study, a multi-scale characterization strategy was employed to investigate the implications of interfacial connectivity between synthesized graphitic carbon nitride (g-C3N4) /bismuth oxychloride (BiOCl)e removal of Rhodamine B (RhB) and Methyl Orange (MO). Morpho-structural characterizations, including Scanning/Transmission Electron Microscopy (SEM/TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and N2physisorption (Brunauer–Emmett–Teller (BET)) analyses, confirmed the successful construction of an intimate interfacial contact between g-C3N4and BiOCl. The optimized composite (15% g-C3N4/BiOCl), prepared via a one-step hydrothermal method, exhibited enhanced photocatalytic performance following pseudo-first-order kinetics described by the Langmuir–Hinshelwood model, with apparent rate constants of 0.166 min−1for MO and 0.519 min−1for RhB. Under visible-light irradiation, degradation efficiencies of 98% for MO (120 min) and 99% for RhB (35 min) were achieved, outperforming the pristine components. Complementary optical and electrochemical analyses indicate improved light absorption and charge-separation efficiency in the heterojunction system. In addition, the photocatalyst demonstrated good operational stability over four consecutive cycles, maintaining 91.70% activity for MO and 99.76% for RhB. Overall, this work highlights the synergistic photocatalytic g-C3N4/BiOCl heterojunction and provides a valuable insight to guide the design of advanced materials for pollutant remediation.
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RSC Advances
·
2019
·Vol. 9
·期 44
·25638-25646
·
IF 3.049
Zhenhe Xu,Baotong Xu,Kun Qian,Zheng Li,Fu Ding,Miaomiao Fan,Yaguang Sun,Yu Gao
The solar-to-fuel conversion using a photocatalyst is an ideal method to solve the energy crisis and global warming. In this contribution, photocatalytic H2 production and organic pollutant removal using g-C3N4/CuS composite was demonstrated. Well dispersed CuS nanoparticles (NPs) with a size of about 10 nm were successfully grown on the surface of g-C3N4 nanosheet via a facile hydrothermal method. The as-prepared g-C3N4/CuS nanocomposite at an optimized loading exhibited a much higher visible light photoactivity, giving up to 2.7 times and 1.5 times enhancements in comparison to pure g-C3N4 for photocatalytic H2 production and methylene orange (MO) degradation, respectively. These enhanced photocatalytic activities are attributed to the interfacial transfer of photogenerated electrons and holes between g-C3N4 and CuS, which leads to effective charge separation on both parts. That is, under the visible light irradiation, electrons in the valence band (VB) of g-C3N4 can directly transfer to the CuS NPs, which can act as an electron sink and co-catalyst to promote the separation and transfer of photo-generated electrons, thus significantly improving the photocatalytic efficiency.
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高影响因子
Catalysis Science & Technology
·
2026
·
IF 4
Xianfeng Zhang,Hao Zhang,Jingbo Lu,Sun Zhao,Jianjian Cheng,Han Zhou,Yuting Liang
This study reports the successful fabrication of a novel ternary heterojunction photocatalyst, denoted as CBA (g-C3N4/BiOI/Ag2CrO4), featuring a double Z-scheme charge transfer pathway aimed at the effective degradation of the toxic azo dye Sudan red III under visible light. The synthesis commenced with the fabrication of porous g-C3N4 via calcination coupled with a subsequent etching process. BiOI nanospheres were then grown onto the g-C3N4 substrate via a hydrothermal route. Subsequently, Ag2CrO4 nanoparticles were anchored on the g-C3N4/BiOI composite via a straightforward precipitation technique. The experimental evidence confirms successful formation of a ternary heterojunction, which exhibits a mesoporous structure and enhanced visible-light absorption. Evaluation of photocatalytic performance revealed that the optimized CBA catalyst (containing 30% g-C3N4/BiOI) attained a Sudan red III degradation efficiency of 82.37% under 90 min visible-light irradiation, with a pseudo-first-order rate constant of 0.01944 min−1. This constant value is 31.35 times that of the binary g-C3N4/BiOI system and 1.99 times that of individual Ag2CrO4. The remarkable photocatalytic enhancement is attributable to the established dual Z-scheme mechanism. This configuration effectively facilitates photogenerated charge separation, broadens visible-light absorption, and maintains high redox potentials. Thus, this work advances the design of efficient g-C3N4-based heterojunction systems, offering a viable strategy for photocatalytic purification of dye wastewater.
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高影响因子
POLYMER COMPOSITES
·
2026
·
IF 4.9
Wei Wu,Yangsheng Zhou,Zijian Tang,Xianwu Cao,Xiaolei Li,Chenhui Zhang
In this work, a hybrid filler g-C 3 N 4 @TiO 2 consisting of g-C 3 N 4 and TiO 2 was prepared by an in situ surface growth strategy. The hybrid was then incorporated into ultra-high molecular weight polyethylene (UHMWPE) by melt compounding to improve wear resistance. The morphology observation revealed that 3 wt% g-C 3 N 4 @TiO 2 could uniformly disperse in the UHMWPE matrix without visible aggregates. The UHMWPE composites containing g-C 3 N 4 @TiO 2 exhibited enhanced thermal stability, crystallinity as well as storage modulus. The tribological tests demonstrated that the UHMWPE composite containing 3 wt% g-C 3 N 4 @TiO 2 achieved the lowest coefficient of friction (0.162) and a significantly reduced wear rate (3.27 × 10 −6 mm 3 /N·m). These values represented reductions of 28.0% and 47.9%, respectively, compared to pure UHMWPE. The surface analysis confirmed that the presence of g-C 3 N 4 and TiO 2 had good synergistic effects on the formation of a continuous, compact tribofilm, which effectively reduced direct contact and abrasive wear. The improved tribological behavior is ascribed to the layered g-C 3 N 4 contributed lubrication through interlayer shearing, while TiO 2 nanoparticles enhanced the mechanical strength and wear resistance of the tribofilm, ensuring its durability under sliding conditions. This work offers a feasible way to develop hybrid additives for UHMWPE composites with low coefficient of friction and good wear resistance. Highlights A hybrid consisting of TiO 2 and g-C 3 N 4 was prepared successfully. The composite exhibited enhanced tribological performance. The addition of hybrid could effectively lower the coefficient of friction. The hybrid filler had good synergistic effects on reducing wear rate.
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高影响因子
Green Energy & Environment
·
2026
·
IF 16.7
Jingyue Hu,Yuanting Wu,Ruihua Gao,Lihui Guo,Guanjun Chen,Hulin Liu,Ou Hai,Xinmeng Zhang,Yunlong Xue,Yongqiang Feng
Synergistically coupling complementary vacancy pairs with an ultrathin framework provides a promising yet underexplored route to robust photocatalysts for water purification. Herein, we report the synthesis of ultrathin SBBC (Bi 12 SiO 20 -Bi 2 O 3 -BiOCl-Bi 2 SiO 5 )/g-C 3 N 4 (CN) nanosheets (SBCN-6) in which surface [Bi 2+ –V O ] defect centers are deliberately paired with nitrogen vacancies (V N ), thereby uniting dual-defect chemistry with an ultrathin framework. Electron-sequestering [Bi 2+ –V O ] clusters introduce deep trap states, which robustly capture photoexcited electrons generated in SBBC. V N sites in CN serve as efficient electron-trapping centers that significantly suppress internal electron-hole recombination within CN, and this combined action accelerates visible-light redox reactions. This synergistic dual-defect network, comprising [Bi 2+ –V O ] in SBBC and V N sites in CN, significantly enhances charge separation. Density Functional Theory (DFT) and X-ray Photoelectron Spectroscopy (XPS) unveil a type-Z/type-II hybrid transfer cascade: SBBC (V B ) → [Bi 2+ –V O ] → SBBC (C B ) → CN (C B ) ← [V N ] ← CN (V B ). Under visible-light irradiation, the photocatalyst exhibits exceptional activity in degrading refractory antibiotics, achieving a high apparent rate constant (k) of 0.129 min -1 for tetracycline (93% degradation in 120 min) and removing 91% of ciprofloxacin in 120 min. Moreover, it rapidly degrades the Rhodamine B dye, with over 99% removal within just 30 min. It also retains excellent recyclability over multiple cycles and outperforms most reported Bi-based photocatalysts. Coupling dual-defect engineering with morphology control, this study advances the mechanistic exploration of defect-mediated catalysis and furnishes a valuable reference for constructing visible-light photocatalysts that simultaneously degrade dyes and antibiotics.
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