Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Ying Zhang,Chao Qu,Decai Yang,Lanyang Wang,Youguo Luo,Qing Ye
Graphitic carbon nitride-based (g-C 3 N 4 ) catalysts that respond to visible light have exhibited substantial potential for application in water splitting for hydrogen production. However, the material faces challenges such as low quantum efficiency and restricted utilization of visible light. In this study, we developed a Z-scheme heterojunction photocatalyst comprising ultrathin g-C 3 N 4 (ExCN) and CuZnInS (CZIS), which significantly enhances the photocatalytic hydrogen production performance. Notably, the hydrogen production rate reached up to 185.23 μmol g −1 h −1 without platinum co-catalysts. Comprehensive characterization and mechanism analysis revealed that the ultrathin, porous structure and oxygen-doped characteristics of ExCN markedly increased the number of active sites and extend the visible light response range. Moreover, ExCN serves as an effective carrier for CZIS particles. The coupling of CZIS with ExCN to form a Z-scheme heterojunction effectively promoted the spatial separation of photogenerated charge carriers. The narrow bandgap of CZIS broadens the light response range, while metal sites function as electron traps, suppressing electron-hole recombination and further enhancing catalytic efficiency. This study offers new insights into the rational design of visible-light-responsive hydrogen production catalysts based on graphitic carbon nitride.
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高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 19
·1465
·
IF 4.3
Nannan Zheng,Yulan Zhang,Chunlei Dong,Zhiming Chen,Jianbin Chen
Fe–porphyrin/g-C3N4composites have emerged as promising visible-light photocatalysts, but their performance remains limited by inefficient charge separation and low reactive oxygen species (ROS) yield. Here, iron–tetra(4-carboxyphenyl) porphyrin (Fe–TCPP) was coupled with g-C3N4nanotubes (CNNTs) via a facile self-assembly strategy, creating a morphology-coordinated system. Comprehensive characterization (XRD, FTIR, SEM/TEM, BET, UV–Vis diffuse reflectance, PL, XPS, and EPR) confirmed the structural integrity, electronic coupling, and ROS generation capability of the composites. Fe–TCPP incorporation narrowed the bandgap from 2.78 to 2.56 eV, prolonged the average carrier lifetime from 6.3 to 7.5 ns, and significantly enhanced the generation of •OH and1O2. The optimized 1 wt% Fe–TCPP@CNNTs achieved complete Rhodamine B degradation within 30 min under visible light, with the highest two-stage apparent rate constants (k1= 0.0964 min−1, k2= 0.328 min−1). In addition, the hybrids retained over 90% activity after six consecutive runs, confirming their stability and recyclability. The synergistic effect of Fe–N coordination and nanotubular architecture thus promotes light harvesting, charge separation, and ROS utilization, offering a promising design principle for high-performance photocatalysts in environmental remediation.
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高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Zhengliang Zhao,Xuelin Wang,Zhu Shu,Jun Zhou,Tiantian Li,Wenbin Wang,Yigen Tan
Mesoporous g-C 3 N 4 consisting of hollow nanospheres (MCNHN) was prepared via a facile vapor-deposition method. It demonstrated an excellent visible-light photocatalytic H 2 evolution activity of 22.3 times greater than bulk g-C 3 N 4 . The special hollow nanosphere structure, increased specific surface area and modified crystalline enabled MCNHN to realize stronger light harvest and better photoinduced electron-hole separation, which leaded to highly improved photocatalytic performance. The proposed method and setup are easy to be established, and have the potential for preparing nanoscale g-C 3 N 4 with other tailored nanostructures.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2017
·
IF 3.582
Yu-pei Li,Fa-tang Li,Xiao-jing Wang,Jun Zhao,Jiang-nan Wei,Ying-juan Hao,Ying Liu
A quantum-sized hematite iron oxide (α-Fe 2 O 3 )/graphitic carbon nitride (g-C 3 N 4 ) hybrids have been designed and constructed through a facile in situ calcination treatment. The α-Fe 2 O 3 /g-C 3 N 4 hybrids were analyzed via various characterization techniques including XRD , TEM , UV–Vis DRS , XPS , and their photocatalytic efficiencies were evaluated by visible light-driven hydrogen evolution . The results reveal that the cooperation of α-Fe 2 O 3 and g-C 3 N 4 during fabrication process leads to synergy effects of not only the morphology but also the microstructure. These hybrids exhibit much higher hydrogen evolution efficiency than pure g-C 3 N 4 under visible-light illumination due to their improved light harvesting capability, enhancement of surface areas , predominant (110) facet exposure of α-Fe 2 O 3 as well as a prominent quantum size effect , and highly efficient electron transfer and separation. A proposed Z-scheme mechanism was further verified experimentally.
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高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 11
·7373-7388
·
IF 5.7
Zhang Hao,He Shiqi,Hu Yanli,Li Fengyan,Zhou Baoming
In this study, a chitosan-based high polymer antibacterial agent CS-g-DMC with high water solubility was synthesized via an environmentally friendly initiator system of H 2 O 2 and ascorbic acid (Vc). The CS-g-DMC is used for the long-effective antibacterial finishing of cotton fabric. SEM, EDS, FTIR, XPS, and XRD were conducted to characterize the finished fabric. After the treatment, the CS-g-DMC were cross-linked with cellulose by 1,2,3,4-Butane tetracarboxylic acid BTCA thus immobilized on cotton fabrics. Results showed CS-g-DMC had linked with cellulose by stable chemical bond and uniformly distributed on the surface of cotton fiber. The antibacterial test shows that after treatment, the inhibition rates of the cotton fabric against E. coli and S. aureus are above 99.9%. Moreover, the inhibition rates of the two bacteria reach 94.3% and 95.3% after washing ten times, respectively. The finished cotton fabric had significantly improved hydrophily; its contact angle decreased from 107° to 104°. Its breaking force significantly increased from 173.38 to 219.33 N, while its breaking elongation and moisture transmission rate had no significant decrease. In general, CS-g-DMC-finished cotton fabrics achieve long-lasting antibacterial properties and higher mechanical properties while retaining a high degree of wearing comfort.
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AQUA-Water Infrastructure Ecosystems and Society
·
2021
·Vol. 70
·期 4
·570-586
·
IF 0
Liu Jiamin,Li Jianjun,Liang Juan,Jing Chengjun,Guo Jiaxiu
Carbon dot (CD)-modified graphitic carbon nitride (g-C 3 N 4 ) photocatalysts were synthesized through a one-step homogeneous thermal pyrolysis. The synergetic effect of citric acid (Cit) and g-C 3 N 4 /CDs for high-performance visible light Cr(VI) photocatalytic reduction had been investigated. Cit was not only acted as a hole scavenger, but might also form surface charge transfer complexes (CTC) with g-C 3 N 4 which delivered electrons on the Highest Occupied Molecular Orbital (HOMO) of Cit to the conduction band (CB) of g-C 3 N 4 . CDs decorated on g-C 3 N 4 could provide channels for the preferential transfer of electrons on CTC to the CB of g-C 3 N 4 as well as improved separation of the charge carriers. Owing to these synergistic effects, g-C 3 N 4 /CDs displayed much higher photocatalytic performance for the reduction of Cr(VI), which was 1.89 times higher than g-C 3 N 4 . Moreover, the synergetic photocatalytic reduction mechanisms of aqueous Cr(VI) were proposed to elucidate the active species formation and photogenerated electron transfer. The results suggested that the in situ generated hydrogen peroxide (H 2 O 2 ) dominated the reduction of Cr(VI). The addition of Cit could trigger the in situ generation of H 2 O 2 and the decorated CDs further enhanced the reaction. This work demonstrated the role of widely existed Cit on the photocatalytic reduction of Cr(VI) in natural aquatic environment. g-C 3 N 4 /CD photocatalysts were synthesized for Cr(VI) reduction. CDs promoted light harvest and improved the separation of charge carriers. Cit triggered the visible light photocatalytic reduction of Cr(VI) over g-C 3 N 4 /CDs. H 2 O 2 is the main effective activator for Cr(VI) reduction in the g-C 3 N 4 /Cit system. The photocatalytic reduction pathways of Cr(VI) in the presence of cit were proposed.
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RSC Advances
·
2015
·Vol. 5
·期 55
·44128-44136
·
IF 3.84
Yufang Tao,Qian Ni,Mingyu Wei,Dongsheng Xia,Xiaoxia Li,Aihua Xu
Semiconducting carbon nitride materials (g-C3N4) were investigated as metal-free catalysts for the activation of peroxymonosulfate (PMS) under visible light irradiation to degrade organic dyes in aqueous solution. X-ray diffraction, scanning electron microscopy, N2 adsorption/desorption isotherms, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy were used to characterize the properties of the material. The effect of several parameters including the concentration of catalyst, PMS and organic dye, and initial solution pH on its catalytic activity was also investigated. It was found that the obtained g-C3N4 can effectively activate PMS under visible light irradiation to generate strong sulfate radicals which was highly active for Acid Orange 7 (AO7) and other organic dyes degradation. The catalyst also presented a long-term stability during multiple runs. Based on intermediate detections, the degradation pathway of AO7 in the g-C3N4/PMS/Vis system was proposed. This study demonstrated a promising approach for the activation of green oxidant, PMS, by the newly-developed polymer photocatalysts for environmental remediation and oxidation catalysis.
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2026
·
IF 7.9
Xiaodong Yang,Tianyang Luo,Shunchang Yang,Yicheng Yang,Pengkai Sun,Lili Wang,Shuo Yang,Ye Han,Bin Gao,Dawei Su
Antibiotic residues are increasingly detected in aquatic environments, posing persistent ecological risks and threatening the sustainable reuse of wastewater resources. Developing low-cost, environmentally benign, and durable photocatalysts for efficient antibiotic removal remains a major challenge for practical water treatment. In this study, an interfacial-bonded kaolinite/g-C 3 N 4 composite was fabricated through an acid–alkali-assisted ball-milling strategy using earth-abundant raw materials. The structural, surface, optical, and photoelectrochemical properties of the composites were systematically characterized, while density functional theory (DFT) calculations were employed to elucidate the interfacial charge-transfer mechanism. The optimized composite (2mKCN10) exhibited a specific surface area of 66.23 m 2 g −1 , approximately 1.4 times that of pristine g-C 3 N 4, and achieved 88.12% levofloxacin removal within 120 min under simulated solar irradiation. The catalyst retained approximately 85% of its initial photocatalytic activity after ten consecutive cycles, demonstrating excellent long-term stability. Radical trapping experiments identified ·O 2 - as the dominant reactive species, while experimental characterization combined with DFT calculations supports the proposed interfacial electronic coupling between kaolinite and g-C 3 N 4 , which promotes charge separation and accelerates carrier migration. The simple and scalable ball-milling synthesis, combined with the use of naturally abundant clay minerals and the absence of noble metals, provides a practical route toward developing low-cost photocatalysts for antibiotic-contaminated wastewater treatment. This work offers an effective strategy for engineering clay–semiconductor interfaces and advances the development of sustainable photocatalytic technologies for wastewater remediation and future water reuse. Download: Download high-res image (256KB) Download: Download full-size image
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Jian Xiao,Jiang Liu,Yuxin Guo,Jiali Lin,Qian Li,Dong Zeng,Ruizhi Wen,Hongchang Li
Given the vital nutritional and metabolic role of ascorbic acid (AA) and the need for rapid detection, a photoresponsive nanozyme-based composite was developed for sensitive, accurate, and convenient AA analysis. In this report, a ternary ZIF-8/g-C 3 N 4 /SiO 2 photoresponsive oxidase-mimicking system was developed and applied to AA detection. By regulating the loading ratio of ZIF-8 on the g-C 3 N 4 /SiO 2 substrate, the composite with excellent photoresponsive oxidase-like activity was successfully prepared. Owing to its enhanced visible-light absorption and efficient charge separation and transfer, the system exhibited significantly improved photoresponsive performance. Experimental results demonstrated that ZIF-8/g-C 3 N 4 /SiO 2 could catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB), generating oxidized TMB (oxTMB) through the formation of reactive species, thereby producing a distinct color change. In an acidic environment, AA inhibited the oxidase-like activity of the catalyst due to its strong reducing capability, thus suppressing the colorimetric reaction. Based on this principle, the as-synthesized ZIF-8/g-C 3 N 4 /SiO 2 photoresponsive oxidase mimic was applied to the detection of AA in three beverages. The method revealed a good linear response within the concentration range of 1–40 μM, and the detection limit (LOD) was 0.14 μM. The recoveries of the spiked samples ranged from 95.00% to 103.85%, suggesting that the present method could be successfully applied to sense AA in practical samples. Furthermore, we integrated ZIF-8/g-C 3 N 4 /SiO 2 with the RGB strategy into a novel sensing platform for the visual/onsite semi-quantitative detection of AA in real samples, demonstrating the great potential prospects for the development of rapid food assay.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Liwei Ma,Heting Li,Shaonan Shan,Yanqing Qin,Xu Yang,Guoqiang Li,Guojie Zhang
Wet Fe(II)EDTA complexation is a promising technology for NO removal, but its practical application is severely hindered by O 2 -induced oxidation of Fe(II)EDTA and inefficient regeneration of Fe(II)EDTA–NO. Herein, an oxygen-vacancy-rich BiOCl/g-C 3 N 4 S-scheme heterojunction with interfacial Bi–O–C covalent bonds was constructed for oxygen-resistant photocatalytic–complexation denitrification. Structural characterizations and density functional theory calculations confirmed that Bi–O–C bonds served as atomic-level charge-transfer channels, strengthening interfacial coupling and promoting directional S-scheme charge separation. This configuration preserved strongly reductive electrons on g-C 3 N 4 for the reduction of Fe( III )EDTA and Fe(II)EDTA–NO, while retaining oxidative holes on BiOCl. Meanwhile, oxygen vacancies on BiOCl acted as preferential O 2 adsorption and activation sites, converting O 2 into ·O 2 − and thereby transforming O 2 from a competitive oxidant into an electron-buffering species that suppresses BiOCl photocorrosion and regulates interfacial redox cycling. The optimized 20BCN–Fe( II )EDTA system achieved an average NO removal efficiency of 88.92% under 14% O 2 and maintained above 80.02% efficiency after 30 cycles. Product analysis revealed a reduction-dominated NO conversion pathway, with NH 4 + and N 2 as the major reduced nitrogen products, a total reduced-product selectivity of 91.9%, and a nitrogen recovery of 94.4%. Kinetic analysis confirmed that NO absorption proceeded in a fast reaction regime enhanced by interfacial redox reactions. This work provides an atomic-level strategy for designing oxygen-resistant photocatalytic systems for wet denitrification under realistic flue-gas conditions.
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高影响因子
LANGMUIR
·
2026
·
IF 4.4
Qiqi Gan,Xiao Feng,Dejun Wang,Yanhong Lin,Tengfeng Xie
In the heterogeneous photo-Fenton-like system, enhanced separation and migration of photogenerated charge carriers can further accelerate the redox cycle of metal ions and promote both H2O2 activation and the generation of reactive oxygen species (ROS). In this work, copper-loaded carbon nitride with nitrogen vacancies (Cu-Nv-CN) was synthesized. Cu-Nv-CN exhibits outstanding heterogeneous photo-Fenton-like activity, 94.0% of tetracycline (TCH) is eliminated within 50 min in the presence of 10 mM H2O2, and the corresponding degradation rate constant reached 0.0522 min–1. Surface photovoltage and femtosecond transient absorption (TA) spectroscopy measurements revealed that Cu sites act as effective electron trapping centers. Furthermore, the introduction of Nv drives the rapid migration of photogenerated electrons to the Cu sites. The synergistic interplay between these two factors significantly improves the utilization efficiency of photogenerated charge carriers. The photo-Fenton-like pollutant degradation mechanism of Cu-Nv-CN was systematically elucidated by combining radical trapping experiments, electron paramagnetic resonance (EPR) spectroscopy, and X-ray photoelectron spectroscopy (XPS) measurements. This study proposes a viable strategy for boosting the catalytic activity of graphitic carbon nitride-based photocatalysts in advanced photo-Fenton-like systems.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Wei Gan,Ruixin Chen,Li Zhang,Jun Guo,Naidong Chen,Wei Liu,Minfu Zhao,Zhaoqi Sun,Haihong Niu,Xucheng Fu
The combination of peroxymonosulfate (PMS) activation and photocatalytic process was an ideal approach for removing persistent organic pollutants. Here, we constructed a single-atom Co-modified S-scheme heterojunction (0.5CoCN/TiO 2 ) to achieve efficient photoexcitation synergistic PMS activation. Comprehensive characterization and theoretical calculation verified that the addition of Co atoms could strengthening the built-in electric field (BIEF) in heterojunction, which accelerates the rearrangement of Co(III)/Co(II). Meanwhile, the Co atoms bonded with the O in PMS accelerate the adsorption of PMS and facilitate the migration of photoexcitation electrons from CoCN to PMS, thereby boosting the generation of reactive oxygen species (ROS). Furthermore, Co atoms optimized the configuration of active sites, facilitating the simultaneous occurrence of non-radical pathways. Driven by the synergistic effects of Fenton-like reactions and photocatalytic reactions, the optimal heterojunction delivered outstanding catalytic activity, degrading 97.2% of sulfadiazine at a low PMS concentration. This research provides a novel strategy to promote the removal of environmentally persistent pollutants via photo-assisted PMS activation.
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