DIAMOND AND RELATED MATERIALS
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2026
·
IF 5.1
Shifeng Ji,Zhuo Li,Yunqing Xing,Nan Yao,Yingjie Zhang,Changbing Ye,Guohua Wang,Maogang Hu,Chunmei Gao
Heterojunction-structured graphitic carbon nitride@bismuth oxyiodide (g-C 3 N 4 @BiOI) nanocomposites were successfully synthesized via a facile solvothermal method. The as-prepared composites were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and UV–visible diffuse reflectance spectroscopy (UV–vis DRS) to elucidate their microstructure, chemical composition, and optical properties. Subsequently, a highly efficient UV/g-C₃N₄@BiOI/H₂O₂ photocatalytic system was developed for the rapid degradation of diethylenetriamine (DETA). Under optimal conditions (initial pH 10.3, 0.4 mL/L H₂O₂, and 0.06 g/L 50 wt% g-C₃N₄@BiOI), the system achieved 95% DETA removal within 30 min under UV irradiation. Notably, cyclic degradation tests coupled with post-characterization revealed the exceptional stability and reusability of the g-C₃N₄@BiOI nanocomposite. Mechanistic studies through radical quenching experiments and electron paramagnetic resonance (EPR) spectroscopy confirmed •OH as the primary reactive species. Furthermore, the degradation pathways were elucidated by combining Gaussian 09 W theoretical calculations with gas chromatography–mass spectrometry (GC–MS) analysis. Finally, the toxicity evaluation model was established by toxicity evaluation software, and the experiments of mung bean germination and zebra fish egg incubation verified the effective detoxification of DETA solution after photocatalytic treatment.
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APPLIED CATALYSIS A-GENERAL
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2019
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IF 4.63
Waheed Iqbal,Bo Yang,Xu Zhao,Muhammad Waqas,Muhammad Rauf,Chongqi Guo,Jinlong Zhang,Yanping Mao
Metal-free graphitic carbon nitride (g-C 3 N 4 ) displays benign photocatalytic properties for contaminants photodegradation under visible photoirradiation. Devising a simple modification strategy for the improved photocatalytic activity of g-C 3 N 4 has always been desired. Herein, we report a spherical worm-like g-C 3 N 4 nanostructure via facile ammonium lauryl sulfate (ALS) gaseous bubbles templating approach. This strategy employing ALS as gaseous bubbles templating agent bestowed not only g-C 3 N 4 with improved specific surface areas, a porous structure with more exposed photocatalytic reactive sites and mass diffusion of reactants molecules, but also rendered extended optical absorption range and suppression of the photoinduced charge carriers recombination. As a result, the ALS-mediated g-C 3 N 4 photocatalysts unfolded excellent photocatalytic performance regarding photodegradation of rhodamine B (RhB) and phenol under visible photoirradiation. Additionally, the quenching effects of various scavengers proved that the holes (h + ) and superoxide anions ( O 2 − ) radicals were the main active species responsible for ameliorated photocatalytic performance for rhodamine B and phenol photodegradation. Our work offers a straightforward approach for developing high-performance metal free photocatalysts with great potential for environmental remediation.
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RSC Advances
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2014
·Vol. 4
·期 85
·45397-45406
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IF 3.708
Yuyu Bu,Zhuoyuan Chen
Carbon nitride@zinc oxide (C3N4@ZnO) composite with a quasi-shell–core structure was prepared in this work. The coating of C3N4 on ZnO significantly increases the photoelectrochemical anticorrosion performance of ZnO. When the amount of C3N4 added is 1 wt%, the C3N4@ZnO composite can provide the best photoelectrochemical anticorrosion capability for 304 stainless steel. This improved performance is attributed to the formation of an effective heterojunction electric field on the interface between C3N4 and ZnO, which improves the separation efficiency of the photogenerated electron–hole pairs, increases the lifetime of the photoinduced electrons, and enhances the photoelectrochemical anticorrosion performance of ZnO.
研究领域:
材料科学
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腐蚀工程
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光电化学
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2026
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IF 8.4
Xiangmei Wang,Huimin Zhang,Pengru Chen,Chuntao Chen,Dongping Sun,Xin Xiao,Bo Pang
With the rapid development of industrialization and urbanization, the removal of organic pollutants from water has emerged as a significant challenge. To overcome the limitations of traditional g-C 3 N 4 photocatalysts, including a wide bandgap and high carrier recombination rate, this study successfully synthesized chlorine-doped carbon nitride (ClCN) via an ammonium chloride pyrolysis self-doping method. The reduction in work function significantly improved charge separation efficiency, while the p orbitals of Cl introduced new energy levels near the valence band, facilitating electron delocalization and enhancing carrier migration. Experimental results demonstrated that the degradation efficiencies of Rhodamine B (RhB) and tetracycline hydrochloride (TC) by the optimized 3ClCN sample reached 99.8 % (k = 0.11465 min −1 ) and 82.5 % (k = 0.03179 min −1 ), respectively, markedly surpassing those of pristine g-C 3 N 4 . Cycling tests confirmed the excellent structural stability of the material, and active species trapping experiments indicated that h + and ·O 2 − played dominant roles in the degradation process. Density functional theory (DFT) calculations revealed that chlorine doping effectively narrowed the bandgap, thereby extending the visible light absorption range. Furthermore, the 3ClCN catalyst exhibited robust adaptability in complex water matrices, offering a highly efficient and stable solution for green water treatment technologies.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2026
·
IF 3.9
Fang Junfei,Liu Lei,Yang Hang,Sun Yulong,Feng Rui,Li Liang,Deng Jianping,Gou Yuchun
Graphitic carbon nitride (g-C 3 N 4 ) is a material with a graphite-like layered structure. Due to its non-toxic and harmless nature, stable performance, and visible light response capability, g-C 3 N 4 holds significant application prospects in the field of photocatalysis. In this study, the Sb 2 (S,Se) 3 was coupled with g-C 3 N 4 to construct a heterojunction structure, and the photocatalytic degradation performance of the g-C 3 N 4 /Sb 2 (S,Se) 3 heterojunction materials on organic dye pollutants was investigated. Firstly, the g-C 3 N 4 /Sb 2 S 3 composite samples were prepared using a hydrothermal reaction. Subsequently, the g-C 3 N 4 /Sb 2 (S,Se) 3 heterojunction structures were constructed through selenization, and then they were used in the efficient photocatalytic degradation process of organic pollutants methylene blue (MB) and rhodamine B (RhB). The results indicate that due to the formation of the heterojunction structure, the light absorption performance of the g-C 3 N 4 /Sb 2 S 3 and g-C 3 N 4 /Sb 2 (S,Se) 3 composite materials is significantly strengthened, and the separation ability of the photo-generated carriers is remarkably improved. Therefore, compared with pure g-C 3 N 4 , the photocatalytic degradation activity of the composite system on MB and RhB is outstandingly enhanced. Furthermore, after partially replacing S with Se through selenization, the resulting heterojunction structure exhibits stronger photocatalytic degradation performance. For example, the 4-GSe sample obtained at a selenization temperature of 140 °C can achieve a degradation rate of 96% for MB within 60 min and a degradation rate of 95% for RhB within 90 min. Moreover, the prepared heterojunction structure can still maintain excellent photocatalytic degradation activity even in complex dye wastewater. This study offers innovative insights for the development of high-performance photocatalysts capable of efficiently degrading complex organic dye wastewater.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
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IF 4.7
Ruxue Ma,Yi Xiong,Fuyou Wang,Zhihao Chen,Xinxin Guan,Xiucheng Zheng
Graphitic carbon nitride (g-C 3 N 4 , CN) is promising in boosting H 2 O 2 photosynthesis at present, but facing huge challenges due to the limitations of common CN (e.g. small specific surface area, low absorption coefficient, and fast recombination of photoinduced carriers). To overcome these drawbacks, herein, the novel type-II heterojunctions are successfully constructed from hexagonal boron nitride (h-BN, abbreviated as BN), melamine, and KCl with the one-pot calcination method. The molten salt effect of KCl and the hard template effect of BN optimize the interlayer spacing, porosity and structural uniformity of CN, thus optimizing the adsorption and photocatalytic properties. Moreover, the constructed heterostructure between BN and modified CN further favors the photoinduced charge transfer. Hence, the resulting composites afford exciting photocatalytic H 2 O 2 synthesis performance. Particularly, catalyzed by MCN/BN-2, the H 2 O 2 production rate is separately 1515.05 μmol g −1 h −1 and 3382.17 μmol g −1 h −1 irradiated by visible light and the simulated solar light, which are significantly higher than those over MCN, BN, and most of CN-based materials previously reported. The results of band potential analyses, relevant radical scavenging experiments, as well as electron paramagnetic resonance measurements verify that the photocatalytic H 2 O 2 production over MCN/BN-2 by using 10 vol% EtOH solution is predominantly through the two-step single-electron oxygen reduction reaction (ORR) process. Also, the one-step two-electron ORR involves in H 2 O 2 formation. This work not only develops a novel broad-spectrum responsive metal-free photocatalyst, but also enriches the deep understanding of the roles played by molten salt engineering and heterostructure in photocatalysis.
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Journal of Materials Chemistry A
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2026
·
IF 9.2
Junchao Duan,Wanyin Xu,Tianhe Gao,Xiaolian Li,YaXuan Sun,Wenkang Miao,Dongling Jia,Heguang Liu,Qianqian Li
Cobalt is an interesting candidate to catalytically convert CO2 gas to value-added chemicals through a thermal hydrogenation reaction. However, its catalytic activity and long-term stability are strongly hindered by its dispersion and phase state. In this work, we deeply investigate the dispersion and reduction behavior of a Co3O4 nano-sized catalyst and precisely optimize its catalytic properties in CO2 hydrogenation by modulating the dispersion and metal–support interactions. Finally, it achieves a stable CO2 conversion of 28% with CH4 selectivity above 85% during a 30 hour longevity test. The improvement is attributed to the strengthened metal–support interaction between Co3O4 nanoparticles (NPs) and the g-C3N4 carrier, which stabilizes the active metallic Co species and significantly boosts catalytic activity and durability. This study provides valuable insights into the structural requisites for optimizing CO2 hydrogenation catalysts and offers a feasible strategy for designing efficient non-noble metal catalysts for CO2 utilization.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 11
·e70420
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IF 0
Hui Bai,Guyu Zhang,Fengqin Tang,Lili Huang,Mingxia Tian,Libing Hu,Zhenghang Qi,Jianhui Jiang
Developing porous-structured organic semiconductor photocatalysts with high charge transfer efficiency is crucial for solar energy utilization, yet remains challenging in pollutant remediation. Herein, an S-scheme C-ZnO/B-g-C 3 N 4 photocatalyst with oxygen vacancies was fabricated through modified biomass-derived C doping for methylene blue (MB) degradation. The optimized catalyst achieved 97.8% degradation efficiency within 70 min under visible light. UV-DRS analysis revealed that C doping narrowed the bandgap and enhanced visible-light absorption. XPS results confirmed the S-scheme charge transfer pathway in C-ZnO/B-g-C 3 N 4 . The synergistic effects of C doping and oxygen vacancies significantly improved charge separation and facilitated S-scheme heterojunction formation. The catalyst exhibited superior photocatalytic performance in alkaline conditions and maintained excellent recyclability. Radical trapping experiments identified the primary reactive species as h + > ·O 2 − > ·OH in descending order of contribution. This work provides a promising strategy for solar-driven pollutant remediation by combining biomass-derived carbon modification with S-scheme heterojunction engineering.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Junpeng Yue,Hanpei Yang,Chen Liu,Qiang Zhang,Yanhui Ao
A new strategy to realize efficient removal of organics from water through photo-self-Fenton was investigated. Characterizations and calculations demonstrated that a novel twin carbon nitride with abundant surficial N-defects and compressed π-π layer stacking can be constructed by thermal polymerization of urea under suitable basicity. Synergistically, the twins exhibited an in-situ H 2 O 2 producing at a rate as high as 26.36 mM h −1 g −1 at 420 nm that exceeded most reported C 3 N 4 , and their mineralization rates for Tetracycline Hydrochloride, Bisphenol A , Ciprofloxacin, and Rhodamine B reached 8.8, 15.2, 9.1, and 13 times higher than that of pristine C 3 N 4 . It is concluded that enriching both of photogenerated electrons and molecular oxygens on specific sites plays a crucial role during photocatalysis-self-Fenton process. Particular attentions have to be paid to build structures achieving one and two-electron reduction of O 2 , and activation of H 2 O 2 to •OH simultaneously.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Xiaoxi Yu,Xiaocui Wu,Fang Guo,Jingping Liu,Qingshan Zhao
As a promising advanced oxidation process , photo-assisted peroxymonosulfate (PMS) activation for wastewater treatment has attracted widespread attentions. However, rational design of synergetic and recyclable catalysts for PMS photo-activation remains a big challenge. In this study, a carbon layer-coated amorphous CoO x supported on graphitic carbon nitride (CoO x @C/g-C 3 N 4 ) composite was fabricated to drive visible-light-assisted activation of PMS for efficient organic pollutant degradation. Amorphous CoO x nanoparticles were in-situ grown on two-dimensional g-C 3 N 4 substrate, among which a carbon layer serves as a high-speed electron transmission channel, facilitating the separation of photogenerated electron-hole pairs and accelerating the Co 3+ /Co 2+ redox cycle. Simultaneously, the carbon layer provides a protective film to suppress Co leaching, thereby improving the catalytic activity and reusability. Owing to the unique heterostructure and synergetic effect, the optimized 6% CoO x @C/g-C 3 N 4 composite exhibits superior catalytic efficiency and excellent cycling stability towards the degradation of various organic pollutants, which displays nearly 100% elimination of tetracycline (TC) within 80 mins. The h + , SO 4 •- and •OH are determined as the main contributors in the visible light-assisted PMS activation system, and the possible catalytic mechanism is also proposed. This work demonstrates a feasible strategy for constructing synergetic and effective photo-activation PMS catalysts for water remediation.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Guiyang Yu,Ke Gong,Chuanwang Xing,Lan Hu,Haibin Huang,Lejie Gao,Debao Wang,Xiyou Li
Organic semiconductor under photoexcitation could generate abundant strong-binding Frenkel excitons and inevitably suffer from low dissociation efficiency (<1%) and poor mobility ability, which severely suppresses the efficient utilization of photogenerated charges and corresponding activity. Herein, a dual P-doping strategy is proposed in bay and corner sites implanted polymeric carbon nitride (PCN-D) for visible-driven H 2 O 2 production. The dual P doping breaks localized electron state around original symmetric heptazine units and weakens the binding energy between electrons and holes, increasing dissociation efficiency to reach 11.9% with 20-fold improvement. In addition, the conductivity ability of PCN-D, including formed carrier charge concentration and mobility, achieves 13-fold and 7-fold improvement, which facilitates the charge transfer and separation. The proposed dual doped-P-site strategy, with the blessing of porous structure, provides plentiful active center for effective adsorption and activation of O 2 molecule, further accelerating reaction progress and achieving six-times increase of photocatalytic H 2 O 2 production rate. This work provides in-depth insight into the importance of dual P-doping to optimize kinetic behavior of photogenerated charges and opens an avenue to the multiscale doping-modulation of semiconductor with high efficiency solar energy conversion.
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OPTICAL MATERIALS
·
2023
·
IF 3.9
Jia Li,Jianfeng Zheng,Xingmin Liu,Yatao Yang,Xiaojin Han,Zhanggen Huang
Photoelectrochemical reduction of CO 2 with H 2 O into syngas (H 2 /CO) is considered as an important platform to organic chemicals, which can effectively alleviate the greenhouse effect and energy dependence. We synthesized SnO/g-C 3 N 4 p-n junction catalyst with matched energy band, which shows enhanced light absorption performance and photogenerated charge separation efficiency. The M − S plots verified the successful construction of p-n type heterojunctions , and the investigations of LSV , EIS , PL and transient photocurrents test indicate that the recombination rate of charge is well inhibited by the design of p-n heterojunction. In this work, the syngas derived from PEC reduction of CO 2 and H 2 O is achieved by the SnO/g-C 3 N 4 photocathode with a total FE of 70% at an external bias of −1.5 V. In addition, the H 2 /CO molar ratio can be tuned from 1.5 to 10 by controlling the applied voltage. The study may inspire a new thought for the design of high-performance photoelectric catalyst and a promising strategy for PEC CO 2 reduction to valuable carbon-based compounds.
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