JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 24
·1-20
·
IF 2.8
Li Yuzhen,Li Shuo,Xia Yunsheng,Sun Zhaoxin,Lan Borong
Photocatalytic technology had attracted attention for the abatement of organic contaminants in wastewater with solar energy. In this study, a binary supported heterojunction photocatalyst (AgIn(MoO 4 ) 2 /g-C 3 N 4 ) was constructed by a facile impregnation method, and the catalyst was utilized for the efficient degradation of tetracycline (TC) under visible light. The structure, micro-morphology and optical properties of the photocatalyst were also characterized and analyzed. Compared with g-C 3 N 4 and AgIn(MoO 4 ) 2 , the composites exhibited excellent photocatalytic performance. Among them, superoxide radicals, hydroxyl radicals and holes were participated in the degradation reaction. In addition, the composites had good cyclic stability and a broad pH usage range. The enhanced photocatalytic degradation performance could be attributed to the Z-scheme electron transfer mechanism, which both promoted the separation of photogenerated carriers and utilized the strongest redox capacity in the monomer. Overall, this work provided a feasible strategy for constructing g-C 3 N 4 -based heterojunction catalysts for efficient removal of TC from polluted water.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Tianrui Xu,Guanghui Wang,Xuewen Zhang,Nansheng Deng
Within the domain of animal husbandry, the misuse of antibiotics in conjunction with elevated levels of heavy metals in feed has led to the contamination of agricultural soils with these metals and antibiotics. In this study, S-scheme heterojunction photocatalyst, BiFeO 3 /Cl-g-C 3 N 4 , was synthesized for the photochemical remediation of tetracycline (TC) and Cr(Ⅵ) in co-contaminated soil, utilizing pyrolysis methods. Following an 8-h photocatalytic reaction, 89.6 % of TC and 75.7 % of Cr(Ⅵ) were effectively removed in soil with the application of BiFeO 3 /Cl-g-C 3 N 4 at a mass ratio of 5 %. The diversity of microbial communities in the remediated soil increased, with a shift in dominant genera from redox bacteria to nutrient bacteria associated with carbon and nitrogen cycling. Moreover, the incorporation of BiFeO 3 /Cl-g-C 3 N 4 in the remediation of soil contamination at depths ranging from 0 to 20 cm resulted in reductions of 40.2 % and 50 % in TC and Cr(Ⅵ) concentrations in subsoil layers, respectively, after 21-days of sunlight irradiation. In comparison to the contaminated group soil, soil from the remediation treatment demonstrated increased growth potential for cabbage and spinach. This work definitely demonstrates that this soil photochemical remediation method based on BiFeO 3 /Cl-g-C 3 N 4 is technologically feasible and has immense potential in the application of remediation of organic pollutants and heavy metals co-contaminated soils.
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ChemistrySelect
·
2025
·Vol. 10
·期 30
·e01615
·
IF 2
Bing Wang,Pinliang Lai,Jian Zhang,Guomin Li,Rao Fu,Hui Liu
Graphical The AgPCN+APS photocatalytic system was constructed in situ and its performance in degrading dyes in complex water environments was systematically investigated. It is of vital importance to develop highly efficient photocatalysts capable of removing dyes from actual wastewater environments. In this study, we constructed a in-situ, novel P-doped g-C 3 N 4 /Ag 3 PO 4 Z-scheme heterojunction photocatalyst (AgPCN) to degrade rhodamine B(RhB) in wastewater activated by persulfate (APS). Without the addition of persulfate, the kinetic degradation constant of RhB degraded by AgPCN can reach 0.53619 min −1 . Under the activation with a specific amount of persulfate, the kinetic degradation constant of RhB in the AgPCN + APS photocatalytic system can reach 0.78844 min −1 , which is 1.47 times higher than that of pure AgPCN. This is attributed to the structural defects of AgPCN itself and the energy level transformation caused by doping. Additionally, the activation of APS stimulates the generation of free radicals such as SO 4 · 2− , O 2 · − , and ·OH during the degradation process of AgPCN. It is worth noting that the AgPCN + APS system has a wide pH tolerance, indicating its application potential in complex actual wastewater environments. After three cycles of experiments, it still maintained a degradation efficiency of over 95%. Therefore, the AgPCN + APS system features excellent stability and wide applicability, providing a promising technical approach for the industrial treatment of dye wastewater.
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MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 1
·1-11
·
IF 5.833
Lv Yuanxia,Qin Xiaohuan,Hu Kun,Huang Yong,Zhao Shulin
A novel matrix-assisted laser desorption/ionization time-of-flight mass spectrometric method (MALDI-TOF MS) for determination of highly sensitive small molecular compounds was developed based on molybdenum disulfide nanosheets hybridized with ultrathin graphitic carbon nitride (MoS 2 /g-C 3 N 4 ) as the matrix. With this approach, the synergistic effects of MoS 2 and g-C 3 N 4 enhance the UV absorption of MoS 2 /g-C 3 N 4 , increase both desorption and ionization efficiency in LDI MS, and induce higher signal-to-noise ratio of analytes when compared with the bare MoS 2 and g-C 3 N 4 matrix in the determination of amino acids, antibiotics, neutral oligosaccharides, uric acid, and polyethylene glycols (PEGs). The detection limits of these small molecular compounds are in the ranges 0.1 to 10 μg mL −1 , 1*10 −3 to 1.0 μg mL −1 , 1.0 to 10 μg mL −1 , and 2*10 −4 μg mL −1 , respectively, and the polydispersity index of these PEGs is less than 1.02. Moreover, high salt tolera`nce and homogeneous deposition on the spot results in good reproducibility. The relative standard deviations (RSDs) of shot-to-shot and spot-to-spot ( n = 15) of these compounds are less than 10.1% and 12.5%, respectively. With MoS 2 /g-C 3 N 4 , the uric acid in complicated biological samples can be directly determined in combination with LDI-TOF MS. Graphical abstract
We synthesized MoS 2 /g-C 3 N 4 nanohybrid as an efficient matrix for MALDI-TOF MS analysis of small molecules as well as quantitative detection of uric acid in human urine.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lijun Chen,Chenguang Wang,Guozhao Liu,Guanwen Su,Leping Dang,Hongyuan Wei
Rational utilization of the surface charge property of components is an effective method to prepare heterojunction. The surface of g-C 3 N 4 nanosheets (CNs) and black phosphorous nanosheets (BPs) both exhibit negative charge, which would produce repulsive force to hinder them from approaching each other. Herein, non-noble and low-toxic Cu(II) was selected to harmonize the CNs and BPs together under the interaction of surface charges, and the Cu(II) was reduced in situ to Cu with good conductivity, obtaining the sandwich-like product BPs/Cu/CNs with tight interface and high separation efficiency of photogenerated carriers. The composites exhibited attractive degradation performance for various pollutants under visible light, especially, 95.3 % of ciprofloxacin (10 mg/L, 200 mL) was removed in 60 min with 50 mg of 6BPs/4Cu/CNs as photocatalyst, and the removal ratio can still reach 87.4 % after the fifth reuse with negligible leaching of Cu ions. An unconventional type-II band structure was built in the BPs/Cu/CNs under the drive of internal electric field and mutual attraction of opposite charges, in which the e - from CB of BPs transferred to Cu and then combined with the h + from VB of CNs, leaving the e - from CB of CNs and h + from VB of BPs still work. Despite the same result to that of typical type-II band structure of BPs/CNs, the flow of photogenerated carriers in the BPs/Cu/CNs was more favorable in thermodynamics.
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CHEMOSPHERE
·
2022
·
IF 8.943
Ze-Yu Liu,Wen-Qian Huang,Chuan-Qing Huang,Zhao-Zhen Liu,Xiao-Yue Tang,Wei-Chang Chen,Zheng-Zheng Tang,Yu-Xing Huang,Shuo-Chun Zheng,Lin Lin,Changzhu Li,Yong Ye
Photocatalytic disinfection is considered a promising method for eliminating the hazards of pathogenic bacteria. Graphitic carbon nitride (g-C 3 N 4 ) is an ideal photocatalytic bacterial inactivation material for its advantage of tunable band structure, good stability and easy preparation. This work has constructed a novel defective 3D porous g-C 3 N 4 by cyanamide carbonation using dendritic mesoporous silica template. The direct loading of Fe 3 O 4 nanoparticles provided an excellent pg–C 3 N 4 –Fe 3 O 4 photocatalyst suitable for water disinfection . Compared to pristine g-C 3 N 4 , the prepared 3D porous defective g–C 3 N 4 –Fe 3 O 4 exhibited the enhanced visible light absorbance as indicated by the band gap decreasing of 0.66 eV, and about 3 and 10 fold increase of photo-induced current response and O 2 adsorption respectively. The pg–C 3 N 4 –Fe 3 O 4 showed excellent visible-light-driven photocatalytic bactericidal activity. It could kill 1 × 10 7 cfu mL −1 Escherichia coli completely within 1 h under visible-light illumination (100 mW cm −2 ) with good reusability, its logarithmic bacterial inactivation efficiency was about 2.5 fold higher than pg-C 3 N 4 . The enhanced bactericidal performance is mainly ascribed to the Fe 3 O 4 involved cascade photo-Fenton reaction.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Wenshuai Si,Yi Shao,Lijuan Chang,Wei Song,Shouying Wang,Zhijie Zhang,Chunxia Yao
A 2D/2D mesoporous Co 3 O 4 /g-C 3 N 4 nanocomposite with triple synergy was constructed. • The Co 3 O 4 /g-C 3 N 4 nanocomposite shows excellent antibiotic removal efficiency. • The photothermal effect accelerates TC degradation by elevating reaction temperature. • This work offers insights into the design of multimodal synergistic photocatalysts for environmental remediation. Developing potent photocatalysts is of great significance for both preventing and remediating antibiotic-polluted environments. In this work, a 2D/2D mesoporous Co 3 O 4 /g-C 3 N 4 (Co 3 O 4 /CN) nanocomposite is constructed and reported as a multimodal antibiotic-degrading photocatalyst featuring triple-function synergy: (1) The mesoporous structure of Co 3 O 4 increases the nanocomposite's surface area, enhancing antibiotic adsorption; (2) Co 3 O 4 /CN exhibits excellent full-spectrum light absorption and remarkable photothermal effect, elevating the temperature of the reaction system to facilitate photodegradation reaction; (3) The p-n heterojunction formed between Co 3 O 4 and g-C 3 N 4 promotes efficient separation of photogenerated electrons and holes. Owing to the combined action of its mesoporous structure, photothermal effect, and efficient charge separation, the Co 3 O 4 /CN nanocomposite demonstrates outstanding photocatalytic performance, with tetracycline (TC) being completely degraded (100% degradation rate) within 100 min. This research offers valuable references for the synthesis of multimodal synergistic photocatalysts applied in environmental remediation. Download: Download high-res image (275KB) Download: Download full-size image This work successfully constructed a 2D/2D Co₃O₄/g-C₃N₄ nanocomposite with triple-function synergy of mesoporous structure, photothermal effect, and p-n heterojunction, which provides valuable references for the design of multimodal synergistic photocatalysts in environmental remediation.
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CHEMICAL PHYSICS LETTERS
·
2026
·
IF 2.9
Ning Fu,Xiaoqing Yao,Xuechang Ren,Yuxiang Chen,Hongjin Chen
AgCl/UiO-66/g-C 3 N 4 ternary heterojunction was constructed. • ACU-70 achieved 99.4% RhB degradation within 105 min. • ACU-70 showed a rate constant of 0.05011 min −1 . • ·O 2 − and h + were identified as the dominant active species. • The Type-II/Z-scheme pathway promoted charge separation. Constructing heterojunctions is regarded as an effective strategy to facilitate the separation of photogenerated charge carriers. A novel Type-II/ Z -scheme tandem heterojunction AgCl/UiO-66/g-C 3 N 4 composite photocatalyst was successfully prepared in this study. The catalyst achieved a 99.4% degradation rate of RhB within 105 min, with an apparent kinetic constant k value of 0.05011 min −1 . These values are 15, 16, and 7.5 times higher than those of pure g-C 3 N 4 , UiO-66, and AgCl, respectively. ·O₂ − and h + are the main active species in the catalytic system. Combined with UV–visible diffuse reflectance spectroscopy results, the successful construction of the Type-II/ Z -scheme tandem heterojunction was further confirmed. A proposed mechanism for the enhanced photocatalytic activity of the AgCl/UiO-66/g-C 3 N 4 composite under UV–visible light illumination. Download: Download high-res image (112KB) Download: Download full-size image
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JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Baogui Ye,Zhongwei Zhao,Hongmei Liu
Construction of multi-interface contact step-scheme photocatalyst is a promising pathway to achieve high-electron transfer efficiency for photodegradation Estrone and Congo red (CR). In this work, g-C 3 N 4 was selected as the main component, CeO 2 nanosheets with unique Ce 4+ →Ce 3+ conversion property and M-rGO were loaded on the surface of g-C 3 N 4 to construct magnetic photocatalyst, whose structure imparted reusability by magnetic retrieval and at the same time M-rGO acted as an efficient host for g-C 3 N 4 /CeO 2 composite photocatalyst. The photocatalytic performances were investigated with Estrone and CR, and the results showed that the composite photocatalyst g-C 3 N 4 /CeO 2 /M-rGO could degrade 71% of Estrone and 92% of CR. Free radical scavenger test showed that superoxide and hydroxyl radical species played a major role in the degradation. Furthermore, it was demonstrated that the magnetic photocatalyst g-C 3 N 4 /CeO 2 /M-rGO possessed strong antibacterial properties against Proteus mirabilis. A three-factor-three-level Box-Behnken design (BBD) was selected to optimize three greatly influential parameters: light irradiation time (min), the mass of photocatalyst (mg) and pollution concentration (ppm) by responding surface methodology. It was expected that the g-C 3 N 4 /CeO 2 /M-rGO can be used as a magnetic photocatalyst to achieve its valorization, which has very broad development prospects in the field of environmental remediation or catalysis.
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DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 20
·8015-8027
·
IF 4.569
Zongyu Zhang,Xiuling Xue,Xiaoyi Chen
A novel ternary dual Z-scheme 2D g-C3N4 nanosheet/Ag3PO4/α-Bi2O3 (CNN/AP/BO) photocatalyst was successfully synthesized by an in situ deposition and hydrothermal–calcination method. The coupling of AP and BO remarkably enhanced the photocatalytic tetracycline (TC) degradation under visible light illumination, with an optimal removal efficiency of 91.6% (60 min), which can be attributed to the extended visible-light absorption and increased specific surface area owing to the interfacial intimate coupling with well-matched energy band positions between semiconductors. The improved photocatalytic activity resulted from the abundant free radicals by the order of ˙O2− > h+ > ˙OH based on the electron spin resonance (ESR) and quenching experiment results. In addition, the possible mechanism of TC degradation over the ternary dual Z-scheme heterojunction CNN/AP/BO was proposed.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yan Jing,Ziyuan Chen,Erli Ding,Rui Yuan,Bingxin Liu,Benhua Xu,Peng Zhang
Graphitic-carbon nitride quantum dots (gCNQDs) have various fascinating properties and potential applications, but the low yield production of gCNQDs by current synthetic methods severely limits to exploit their properties and large-scale applications. Here we report the large scale synthesis of uniform gCNQDs through a combination of hydrothermal treatment, sintering and sonication methods for the first time. The production yield is up to 39 %, and the obtained gCNQDs dry powder possesses outstanding redispersibility, stability and water solubility in deionized water. The gCNQDs aqueous suspensions emit bright blue luminescence under UV excitation and can be an effective fluorescence probe for Fe 3+ detection with good selectivity, sensitivity and photostability. The fluorescent probe shows low cytotoxicity and good cell-permeability, and then being successfully applied for the fluorescence imaging of Fe 3+ in living cells. Moreover, the gCNQDs show the improved photocatalytic activity, which was evaluated by degradation of Rhodamine B and Methyl Orange. The large scale synthesis of gCNQDs with outstanding fluorescent properties, biocompatibility and photocatalytic properties can effectively facilitate the applications of gCNQDs and gCNQDs based nanocomposites in various fields.
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yuehan Cao,Ruiyang Zhang,Qian Zheng,Wen Cui,Yang Liu,Kaibo Zheng,Fan Dong,Ying Zhou
The photocatalytic performance of two-dimensional materials is largely limited by the fast recombination of photogenerated charges. Herein, we design and fabricate a novel g-C3N4/BO0.2N0.8 van der Waals heterostructure to realize oriented charge flow in-plane and separation within the interface. On one hand, a B–C bond forms within the g-C3N4/BO0.2N0.8 interface after the introduction of O atoms. The B–C bond as the mediator bridges g-C3N4 and BO0.2N0.8 sides to enhance the effective separation of photogenerated charges. On the other hand, the existence of O atoms promotes the formation of a B–O–O–B intermediate to realize that molecular oxygen can directionally obtain electrons from the surface to generate •O2–. As a result, BO0.2N0.8 instead of g-C3N4 is considered to be the main reaction side, and the energy barrier of NO3– generation is significantly decreased. The NO removal performance of g-C3N4/BO0.2N0.8 is enhanced and the NO2 generation is effectively controlled compared with that of g-C3N and g-C3N4/BN. This work could provide an effective and facile strategy to tune oriented charge transfer.
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