JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
·
IF 4.7
Mingzhu Yuan,Lei Jiang,Sitian Mao,Wenhong Zhou,Xiangang Lin,Yupeng Yuan
The efficient exploitation of visible light while optimizing the charge migration of the photocatalysts is a critical strategy to achieve a significant enhancement of solar energy conversion efficiency. Herein, a g-C 3 N 4 /WO 3 (P/W-x%) Z-scheme heterojunction photocatalyst was successfully engineered by incorporating unique WO 3 nanocubes into g-C 3 N 4 nanosheets with n-π* electronic transition (PCN). Under visible light irradiation, the optimized P/W-2 % presents excellent photocatalytic activity with the H 2 production rate of 3.82 mmol h −1 g −1 , which is 13.2 and 3.9 times higher than that of BCN and PCN, respectively. The excellent photocatalytic H 2 production performance is attributed to the n-π* electronic transition of the lone electron of the N atoms in g-C 3 N 4 , which enhances the visible light trapping ability. More importantly, In-situ X-ray photoelectron spectroscopy (ISI-XPS) measurement confirms the transport of photo-generated electrons from WO 3 nanocubes to PCN nanosheets. Consequently, a Z-scheme P/W-2 % heterojunction is proposed based on the flow direction of photogenerated electrons in combination with the energy band structure. It not only promotes the rapid separation and migration of photogenerated carriers, but also enhances the reduction capability. This study provides a valuable design idea to enhance the performance of photocatalytic H 2 production via light absorption and charge dynamics.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Guanbin Wen,Bin Zhang,Yingzeng Zhang,Qing Wang,Qianqian Guo,Qisheng Wang,Zhengfang Yang,Xiao Wang,Yushu He,Donghui Yang,Luyun Xu
Photocatalytic antibacterial materials, which kill bacteria by generating reactive oxygen species (ROS) without relying on metal ion components, offer higher safety and environmental friendliness, making them a key focus of current antibacterial research. Traditional photocatalytic materials exhibit limited responsiveness to visible light, and their antibacterial efficacy diminishes when the generation of ROS is suppressed. Therefore, this study developed a g-C 3 N 4 /CdS-Cu Z-scheme heterojunction with strong visible light responsiveness, enabling the generation of alternative ROS when one type is inhibited. The material exhibited excellent antibacterial performance under visible light, with antimicrobial rates of 95.46 % and 95.91 % against E. coli and S. aureus , respectively. Microstructural and photoelectric analyses confirmed that the material possessed a tightly coupled two-dimensional heterostructure with full-spectrum absorption capacity and efficient separation of photogenerated charge carriers. Additionally, density functional theory (DFT) calculations revealed changes in electron transfer pathways and energy band structure, further supporting the proposed antibacterial mechanism. In practical application tests, g-C 3 N 4 /CdS-Cu showed good performance in water treatment. This study on the “ROS compensation” mechanism provides a theoretical basis for the development of advanced photocatalytic antibacterial materials and expands their application range.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121659
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IF 7.5
Xinrui Lv,Huinan Sun,Zhijia Wu,Wei Gao,Mingshu Bi,Yufeng Wu
The study employed a synergistic surface-band engineering strategy to prepare a novel g-C 3 N 4 -based photocatalyst for the efficient and safe degradation of nitrobenzene (NB), a typical recalcitrant pollutant. Fe 0.010 /LCDs-TCN exhibited a higher density of active sites, a broader visible light absorption range, and a more effective separation and transfer of charge carriers. Importantly, Fe 0.010 /LCDs-TCN displayed a bandgap of 2.59 eV, with a valence band of + 2.04 eV and a conduction band of −0.55 eV. This narrowed bandgap, along with an optimized band potential, enabled the simultaneous generation of crucial active species ·OH and ·O₂⁻ from water and O₂. This mechanism skillfully balanced visible light absorption and redox capability. Regarding degradation performance, degradation rates reached up to 93 % for NB within 4 h, and 98 % for nitrophenols within only 60 min. Moreover, this system exhibited strong stability against pH variations and coexisting ions. The 5 cyclic experiments achieved high degradation efficiency of 74.3–94.7 %. The QSAR-based ECOSAR and Toxicity Estimation Software Tool (T.E.S.T.) confirmed a significant reduction in acute and chronic toxicity and mutagenicity of NB degradation system. This work offers a novel perspective on regulating g-C 3 N 4 by balancing light absorption and redox capability, providing a promising strategy for safe, efficient, and sustainable water purification technologies.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2026
·
IF 5.2
Yuqing Feng,Ziyan Tang,Jiaxian Tan,Hongxia Liu,Yingsen Fang,Shumei Gao,Ping Sun,Hui Wang,Hui Liu
Non-metallic photocatalysts represent a promising avenue for the green remediation of organic wastewater. In this study, O-doped g-C 3 N 4 (OCN) was synthesized using a one-step calcination strategy and synergistically coupled with periodate (PI) under visible light to develop a novel non-radical OCN/PI/Vis photo-Fenton-like system for the efficient degradation of Acid Orange 7 (AO7). Systematic characterization techniques, including transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) and photoluminescence (PL), along with density functional theory (DFT) calculations, were employed to elucidate the catalyst properties, oxidant adsorption, and reaction mechanisms. The OCN/PI/Vis system achieved a 93.9% removal of AO7 within 20 min and exhibited a reaction rate constant ( k = 1.48 × 10 −1 min −1 ) that was 4.4 times higher than that of the OCN/Vis system, significantly outperforming traditional oxidant-coupled systems (PMS/PDS/H 2 O 2 ). DFT calculations indicated that OCN exhibited an ultra-strong PI adsorption affinity ( E ads = −2.541 eV), leading to the elongation of the PI I-O bond and facilitating its activation. Quenching and electron paramagnetic resonance (EPR) experiments confirmed that singlet oxygen ( 1 O 2 ) is the dominant reactive species. Notably, the system demonstrated excellent anti-interference performance. This work establishes a high-efficiency, metal-free photo-Fenton-like system for dye wastewater treatment and provides a theoretical and experimental foundation for the rational design of g-C 3 N 4 -based PI activators, thereby opening new avenues for PI-based advanced oxidation processes (AOPs) in environmental remediation.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 10
·8673-8687
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IF 2.324
Qin Qingyuan,Shi Qingdan,Sun Wen,Wan Junmin,Hu Zhiwen
The purpose of this research is to design and fabricate a novel ternary hybrid nanostructure heterojunction with high-efficiency visible-light-driven photocatalysis. The porous layered TiO 2 nanotubular structures (TNTs) with high percentage of photocatalytic reactive facets, which were turned into by commercially available TiO 2 , were wrapped on the surface of hydroxylation carbon nanotubes (CNTs) through the formation of Ti–O=C and/or Ti–O–C bond between CNTs and TiO 2 . Then the TNT@CNT nanotubular composites were coated by ultrathin g-C 3 N 4 nanosheets with a thickness of 3–4 nm. The ternary nanocomposites owned strong absorption performance, low charge recombination rates and high-efficiency photocatalytic activities, which were all owe to high surface areas and excellent adsorptivity of the CNTs, photocatalytic performance of TiO 2 nanotubes (TNTs) and moderate band gap of g-C 3 N 4 nanosheet. What’s more, the formation of chemical bonds greatly improved visible-light photocatalytic activity with a degradation rate of 98.2 and 97.9% for methylene blue and rhodamine B in 60 min under visible-light irradiation, which showed ~ 10 times enhancement compared to pure TiO 2 . In addition, the existence of h + and ·OH and ·O 2− radicals played main role in the photocatalytic process. The new material was of great significance to environmental protection and energy criss.
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Journal of Nanostructure in Chemistry
·
2023
·
IF 10.1
Yu Dexin,Zhang Feng,Yu Kai,Qu Fengyu
Cobalt-based Layered double hydroxides (Co-LDHs) through designing composite nanostructures and heterogenous junctions, has absorbed an increased concern for dual-function applications including electrochemical sensing and energy devices. Herein, the g-C 3 N 4 and GO are applied as two-dimensional (2D) scaffolds for one-pot synthesis of 2D α/β-Co(OH) 2 phase junction (α/β-Co(OH) 2 /g–C 3 N 4 /rGO, denoted as CCG) in dopamine sensing and oxygen evolution reaction (OER). The coexist of hetero-phase structure (α and β-Co(OH) 2 ) toward crystalline phase has been confirmed by various techniques. Dependent on hetero-phase structural and compositional characteristics of CCG, CCG has revealed excellent electrochemical performance: a ranking sensing response to dopamine with ppb-level sensitivity and wide detection range; and high electrocatalytic ability (38.02 mV dec −1 ) with more stable catalytic capacity toward oxygen evolution reaction (OER). The above considerable potentials for CCG ascribes to the synergistic effect of heterostructure, phase structure along with defect of α/β-Co(OH) 2 .
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高影响因子
Carbon Letters
·
2023
·Vol. 33
·期 3
·847-862
·
IF 4.5
Guo Huilin,Yu Tingting,Zhao Lei,Qian Jun,Yu Jiahe,Zhang Yu,Teng Yongyue,Zhu Chunshui,Yang Tao,Chen Wenbin,Gong Picheng,Jiang Cuishuang,Gao Changfei,Yang Bing,Yang Chenyu
In this study, a bipolar visible light responsive photocatalytic fuel cell (PFC) was constructed by loading a Z-scheme g-C 3 N 4 /carbon black/BiOBr and a Ti 3 C 2 /MoS 2 Schottky heterojunction on the carbon brush to prepare the photoanode and photocathode, respectively. It greatly improved the electron transfer and achieved efficient degradation of organic pollutants such as antibiotics and dyes simultaneously in two chambers of the PFC system. The Z-scheme g-C 3 N 4 /carbon black/BiOBr formed by adding highly conductive carbon black to g-C 3 N 4 /BiOBr not only effectively separates the photogenerated carriers, but also simultaneously retains the high reduction of the conduction band of g-C 3 N 4 and the high oxidation of the valence band of BiOBr, improving the photocatalytic performance. The exceptional performance of Ti 3 C 2 /MoS 2 Schottky heterojunction originated from the superior electrical conductivity of Ti 3 C 2 MXene, which facilitated the separation of photogenerated electron–hole pairs. Meanwhile, the synergistic effect of the two photoelectrodes further improved the photocatalytic performance of the PFC system, with degradation rates of 90.9% and 99.9% for 50 mg L −1 tetracycline hydrochloride (TCH) and 50 mg L −1 rhodamine-B (RhB), respectively, within 180 min. In addition, it was found that the PFC also exhibited excellent pollutant degradation rates under dark conditions (79.7%, TCH and 97.9%, RhB). This novel pollutant degradation system is expected to provide a new idea for efficient degradation of multiple pollutant simultaneously even in the dark.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Juanqin Xue,Long Shi,Peng Wang,Wen Cheng,Mingyang Long,Mengjiao Sheng,Qiang Bi
The coal chemical industry generates large quantities of volatile organic compounds (VOCs) and solid wastes. Within this work, porous semi-coke activated carbon (SAC) was produced from solid waste semi-coke (SC) powder. Through loading high performance photocatalysts onto SAC to efficiently degrade VOCs using synergistic effects of adsorption and photocatalysis, acheiving the resourcefulness of solid waste. The specific surface area of the prepared SAC can reach 619.27 m 2 .g −1 , which was effective against the adsorption of VOCs. An one-step hydrothermal method was used to load a 2D Z-scheme g-C 3 N 4 -Bi 2 WO 6 (NB) photocatalyst on a semi-coke activated carbon. The 50 wt% NB/SAC material degraded formaldehyde, benzene and toluene up to 93.6%, 84.4% and 78.8% in 130 min under visible light irradiation, being 6.09, 4.55 and 4.75 times higher than that of a single photocatalyst, respectively. The capture experiments showed that hydroxyl radicals (⋅OH) and superoxide radicals (⋅O 2 – ) were the active species in the degradation pathway. The material maintained a high degradation performance of 84.8%, 79.6% and 74.0% even after five cycles. In this study, the mechanism of using SAC as a substrate to enhance performance in photocatalytic degradation was described. The results of this study offered new insights into the resourcefulness of solid waste and the effective degradation of VOCs. It also offered a promising theoretical foundation for the exploitation and utilization of high-performance photocatalysts.
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International Journal of Environmental Research and Public Health
·
2022
·Vol. 19
·期 5
·2934
·
IF 4.614
Hong Liu,Houwang Chen,Ning Ding
In this research, the preparation of a Ag3PO4/g-C3N4@MoS2photocatalyst and the performance and mechanism of degradation of 2-amino-4-acetaminoanisole (AMA) were studied. The phase composition and morphology of the synthesized samples were comprehensively characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), ultraviolet–visible diffuse reflectance (UV–Vis), and photoelectron spectroscopy (XPS). The catalytic performance of the photocatalyst was evaluated by the visible-light catalytic degradation of the AMA. The experimental results show that the Ag3PO4/g-C3N4@MoS2composite photocatalyst has stronger photocatalytic oxidation and reduction capabilities than Ag3PO4and Ag3PO4/g-C3N4. The material only decreases by 31.3% after five cycles of use, indicating that the material has good light stability. Free radical capture experiments prove that photo-generated holes (h+) and superoxide radicals (·O2−) are the main active substances in the photocatalytic process. The fundamental studies in the present research provide a new perspective for constructing an innovative type of visible-light photocatalyst and a new way to promote the photocatalytic degradation of organic pollutants.Keywords:catalysis;degradation;nanomaterials;Ag3PO4;heterojunction formation
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Chunyan Yang,Hua Chai,Peng Xu,Peng Wang,Xiaojing Wang,Tianyao Shen,Qingzhu Zheng,Guangshan Zhang
Atrazine (ATZ), as a widely used s-triazine herbicide, has persistence and biological toxicity in the environment. Photocatalytic technique is considered as sustainable and promising strategy for the degradation of emerging organic pollutants. Thus, 3D/2D Bi 2 WO 6 /g-C 3 N 4 heterojunction photocatalysts were synthesized via one-step hydrothermal method for ATZ degradation. The Bi 2 WO 6 /g-C 3 N 4 -0.15 exhibited 99.96% removal efficiency for ATZ and the rate constant was approximately 25, 4.8 and 10 times greater than the rate constants of Bi 2 WO 6 , g-C 3 N 4 and “Bi 2 WO 6 + g-C 3 N 4 ”, respectively. The influence of synthesis reaction factors of Bi 2 WO 6 /g-C 3 N 4 and various environmental factors including catalyst dosage, ATZ concentration, pH, common anions and HA on photocatalytic property of Bi 2 WO 6 /g-C 3 N 4 were also investigated. The radical-quenching experiments proved that holes (h + ), 1 O 2 and O 2 – played pivotal roles in ATZ degradation in Bi 2 WO 6 /g-C 3 N 4 photocatalytic system. The ATZ degradation pathway involved dealkylation, alkyl hydroxylation, alkyl oxidation, dechlorination-hydroxylation and deamination-hydroxylation reactions, which was proposed by HPLC–MS/MS results and density functional theory (DFT) analysis. Moreover, quantitative structure–activity relationship (QSAR) evaluation showed that the ecotoxicity of many intermediates declined compared with ATZ. The 3D/2D Bi 2 WO 6 /g-C 3 N 4 heterojunction exhibited excellent photostability and pH adaptability, showing efficient practicality in the removal of refractory organic pollutants in wastewater.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Chengyu Chu,Nan Li,Tiefeng Xu,Feng Gao,Chenxiao Qi,Wangyang Lu,Wenxing Chen
Solar light response photocatalysts have been extensively studied to alleviate energy crisis and solve environmental pollution problems. Herein, polymerized iron phthalocyanine (FePPc) was prepared and then compounded with graphitic carbon nitride (g-C 3 N 4 ) by ball milling to obtain FePPc/g-C 3 N 4 composite photocatalyst. During the ball milling process, FePPc was mechanically exfoliated and compounded with g-C 3 N 4 , which the binding mode mainly relied on π-π stacking interaction with each other. Carbamazepine (CBZ) was completely removed within 15 min by FePPc/g-C 3 N 4 under solar irradiation in the presence of peroxymonosulfate (PMS). Moreover, carbon dioxide (CO 2 ) was also effectively reduced in the solar light responsive catalytic system with FePPc/g-C 3 N 4 and the CO yield was 3388.98 µmol/g in 12 h. Compared with small molecule iron phthalocyanine (FePc)/g-C 3 N 4 , FePPc/g-C 3 N 4 presented a significantly enhanced photocatalytic oxidation and reduction performance under solar light irradiation. Significantly, the visible light response of composite catalyst has been broadened due to FePPc sensitization, which reaching the near-IR light absorption band. Meanwhile, the compounding of photogenerated electron-hole pairs were efficaciously suppressed originating from the stronger bonding and greater electronic transfer between FePPc and g-C 3 N 4 . This work provides an effective basis for improving the utilization of sunlight in wastewater treatment and CO 2 reduction.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Xueting Mei,Shujun Chen,Gangqiang Wang,Wenxing Chen,Wangyang Lu,Bingying Zhang,Yu Fang,Chenxiao Qi
The peroxymonosulfate-based advanced oxidation process (PMS-AOP) is widely studied as a powerful technology for organic pollutants degradation in wastewater. In this paper, an inventive one-step method utilizing potassium persulfate (KPS) as an oxidizing agent was put forward to prepare metal-free carboxyl modified graphite phase carbon nitride (g-C 3 N 4 (KPS)), which was applied to significantly activate PMS for the degradation of organic compound carbamazepine (CBZ) under solar radiation. Without strong acids and organic solvents , the process was considered green, low-cost, and facile. The characterizations showed that g-C 3 N 4 (KPS) was successfully doped with carboxyl groups on g-C 3 N 4 . Besides, •OH, 1 O 2 , •O 2 − and h + were generated in the photocatalytic system of g-C 3 N 4 (KPS)/PMS. As a result, a possible CBZ photocatalytic degradation pathway was proposed. This work not only discovered a novel method of activating PMS but also offered valuable insights for the preparation of efficient metal-free catalysts for wastewater environmental governance.
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