INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Yanyan Wang,Xin Ding,Ping Zhang,Qi Wang,Kang Zheng,Lin Chen,Jianjun Ding,Xingyou Tian,Xian Zhang
In this work, a TiO2/g-C3N4 photocatalytic coating is built on cotton fabrics with a simple layer-by-layer (LBL) self-assembly strategy in which TiO2 and g-C3N4 are alternately assembled on cotton fabrics via electrostatic attraction. The fabrics, as support, disperse TiO2/g-C3N4 powder photocatalyst to expose more active sites. The fabrics also act as an adsorbent to boost the pollutants capture. Consequently, the coated fabrics exhibit an outstanding photocatalytic property applicable for degradation of both liquid rhodamine (RhB) and gaseous toluene pollutants. The fabric with seven bilayer coatings shows the best for RhB decomposition with degradation rate of 92.5%. Over 90% toluene could be eliminated by the photocatalytic coating under simulated sunlight irradiation. Besides, the coating fabrics show excellent stability and reusability.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123628
·
IF 7.5
Yan Wang,Jiang Meng,Siyao Wang,Yuzi Yin,Tianyi Huang,Yue Wang,Jianyu Han
The development of efficient photocatalysts for antibiotic removal remains constrained by the lack of well-defined active sites and severe charge recombination. Herein, a nitrogen-vacancy-rich carbon nitride coupled with mixed-phase bismuth oxide (α-Bi 2 O 3 /β-Bi 2 O 3 /g-C 3 N 4 -nitrogen vacancies, denoted as N V -αβBO) was rationally constructed via NaBH 4 -assisted defect engineering and in-situ phase transformation. The optimized N V -αβBO-4 shows significantly enhanced photocatalytic performance under visible light and rapidly removes tetracycline hydrochloride (TCH). Systematic characterizations show that nitrogen vacancies facilitate O 2 adsorption and activation. Meanwhile, the interfacial coupling among α-Bi 2 O 3 , β-Bi 2 O 3 and defective g-C 3 N 4 (N V -CN-10) promotes directional charge transfer and suppresses carrier recombination. More importantly, a dual S-scheme charge-transfer pathway is established. This pathway preserves photogenerated electrons and holes with strong redox capability, thereby promoting reactive oxygen species (ROS) generation. This work demonstrates a synergistic strategy by integrating defect engineering with phase-junction construction, providing new insights into the design of high-performance photocatalysts for antibiotic wastewater treatment.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yuankun Liu,Yeqian Huang,Yuanqi Cao,Xinxia Zhang,Ying Wang,Xing Li
Hexavalent chromium (Cr(VI)) poses considerable environmental and health hazards owing to its high solubility and mobility. Therefore, developing highly sensitive detection methods for Cr(VI) is essential. In this work, a multifunctional graphene quantum dots/bismuth oxybromide/graphitic carbon nitride (GQDs/BiOBr/g-C 3 N 4 ) fluorescent probe with excellent detection and removal capabilities was synthesized through integrated hydrothermal treatment, calcination, and coprecipitation. Optimization studies showed that maximum sensitivity was achieved at pH 7.5, a probe concentration of 2.5 mg/L, and a reaction time of 20 min. Cr(VI) induced selective fluorescence quenching at 436 nm, displaying a linear response (R 2 = 0.966) over the range of 0–200 μmol/L, with a detection limit of 24.84 μmol/L. The probe maintained > 90 % fluorescence stability under UV irradiation (365 nm, 180 min), high ionic strength (0.1 mol/L NaCl), and in the presence of various interferents (10 common metal ions and non-fluorescent dyes). Analysis of the nonlinear Stern–Volmer plot, EDTA-2Na-mediated fluorescence recovery, and lifetime measurements suggests a static quenching mechanism, in which the excited-state electrons of GQDs/BiOBr/g-C 3 N 4 interact with Cr(VI), driving a nonradiative complexation process. This study demonstrates a dual-functional material capable of simultaneous Cr(VI) detection and removal, providing a practical platform for environmental monitoring.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Hui Lu,Xiaoran Li,Feng Li,Xiuquan Xu,Rong Zhao,Chenyi Xiong,Qing Hu,Zhuoqing Miao,Miao Tian
Photocatalytic technique has been widely accepted as a promising and effective candidate for eliminating antibiotic and pathogen pollutants in aquatic environment. Herein, a novel O, K co-doped g-C 3 N 4 photocatalyst embedded with single-atom Ag (denoted as Ag/OKCN) was successfully constructed to achieve the enhanced photocatalytic degradation and disinfection efficiency under visible light irradiation. The optimal Ag/OKCN-6 could eliminate 80.4 % of tetracycline (TC) within 60 min with a rate constant of 0.0259 min −1 , which was 4.98 times of pristine g-C 3 N 4 . Meanwhile, Ag/OKCN-6 could also completely inactivate>7-log CFU·mL −1 of Escherichia coli ( E. coli ) by efficient disruption of cell membranes. The synergistic effect of O, K co-doping and single-atom Ag embedding contributed to an extended light response, preeminent separation and transfer of photoexcited charges, prolonged carrier lifetime as well as ameliorative hydrophilicity, which was conducive to the excellent photocatalytic performance. Radical trapping and electron spin resonance (ESR) experiments validated that superoxide radicals ( • O 2 − ) were crucially responsible for the superior photocatalytic activity. This work provides a facile route to construct multi-strategy modified g-C 3 N 4 -related photocatalysts for efficiently eliminating aquatic environmental pollutants.
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Xiang Li,Xianyi Gan
A large variety of pharmaceuticals and personal care products (PPCPs) have been detected in water which makes it imperative to explore new materials for their efficient removal. In this study, the photo-Fenton degradation of pharmaceuticals has been investigated systematically via in situ synthesized Cu-doped g-C 3 N 4 . Detailed photoelectrochemical measurements confirm that the adsorption edges of modified g-C 3 N 4 show a remarkable shift (Band gaps decreased from 2.79 eV to 2.17 eV), indicating the advantages of solar light absorption . Three major reactive radicals were identified, including •OH, 1 O 2 , and - ∙O 2 . The sulfadimethoxine (SMT) was degraded completely (> 99 %) at a wide pH range from 4 to 8. A total of 16 micropollutants , including anti-inflammatory, quinolone, and macrolide, were spiked with low concentration (100 μg/L) in simulated water, which can be removed rapidly within only 3 min. To make separating and reusing easy, the powder was successfully loaded onto a PTFE (Poly tetra fluoroethylene) support (0.22 µm) with a loading amount of 1.29 mg/cm 2 . The pharmaceutical can be effectively degraded without obviously losing the active properties under simulated solar irradiation.
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高影响因子
Materials Advances
·
2021
·Vol. 3
·期 1
·672-681
·
IF 0
Ziyang Zhu,Chuanying Wei,Di Jiang,Xinru Wu,Min Lu
In this study, two-component composites consisting of transition metal copper oxide (CuO) and graphite carbon nitride (g-C3N4) were successfully synthesized. Firstly, a typical metal–organic framework (MOF) material, namely CuBTC, was prepared by the hydrothermal method. Then, the hollow porous CuO/g-C3N4 composite with an octahedron structure was obtained by introducing a certain amount of g-C3N4 into the system using ultrasonic treatment and rapid thermal annealing. The synthesized CuO/g-C3N4 not only retains the unique octahedral morphology of the CuBTC template, but also is coated by a uniform carbon layer. This CuO/g-C3N4 displays a high reversible specific capacity (1530.4 F g−1, 2 A g−1) as an anode material. In addition, an asymmetric supercapacitor assembled with self-made NiCoMOF as the cathode and CuO/g-C3N4 as the anode achieves an excellent energy density of 50.8 W h kg−1 at a power density of 800 W kg−1 and stable cycling performance (70.1% capacity retention over 3000 cycles). These outstanding electrochemical properties are attributed to the synergistic effect between transition metal oxides and carbon-based materials as well as the unique structure of the composites, which also provides a facile design and synthesis idea to construct high-performance transition metal compounds with a unique hollow structure and C-coating for developing asymmetric supercapacitors with high energy and power densities.
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Chemistry Africa-A Journal of the Tunisian Chemical Society
·
2021
·Vol. 4
·期 2
·367-377
·
IF 0
Zou Miaomiao,Zou Suyan,Hu Chunyan,Lin Xiaoyun,Ni Yongnian
In this paper, graphite phase carbon nitride (g-C 3 N 4 ) was prepared by one-step high temperature thermal decomposition method, and layered g-C 3 N 4 was prepared by protonation with concentrated hydrochloric acid. The morphology and composition of g-C 3 N 4 were characterised by transmission electron microscope (TEM), energy dispersive spectroscopy (EDS) and X-ray powder diffraction (XRD). Furthermore, the AuNPs-g-C 3 N 4 /GCE was constructed by coating method and potentiostatic deposition method, and the construction process and resistance change of the electrodes were characterised by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The experimental results indicated that the AuNPs-g-C 3 N 4 /GCE has excellent electrocatalytic performance for bisphenol A (BPA) and 4-n-octylphenol (OP). Under optimized experimental conditions, BPA and OP were detected by differential pulse voltammetry (DPV) at the AuNPs-g-C 3 N 4 /GCE. The linear ranges were 0.1–6.5 µmol L −1 and 0.1–3.8 µmol L −1 for BPA and OP, wtih the detection limits of 0.0176 µmol L −1 and 0.0324 µmol L −1 , respectively. In addition, the AuNPs-g-C 3 N 4 /GCE showed satisfactory reproducibility and stability and can be successfully applied to monitor of BPA and OP in baby formula samples.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Yunlei Zhang,Wen Guan,Hongyao Song,Yanan Wei,Pei Jin,Bing Li,Changhao Yan,Jianming Pan,Yongsheng Yan
Chemically functional microporous metal-organic frameworks (MOFs) crystals are attractive for catalysis applications, and recent results show that they can be immobilized on high stability substrates, such as carbon materials. In this work, g-C 3 N 4 supported UiO-66-type MOFs catalysts with only acid, base or acid-base bi-functional active sites, have been successfully synthesized via a green (aqueous solutions), mild (90 °C, atmospheric pressure), and one-pot modulated hydrothermal (MHT) method. The physical and chemical properties of the obtained catalysts were systematically characterized by different characterization methods. The results indicated that the synthesized catalysts have microporous structure, excellent thermostability and acid-base bi-functional active sites. One-pot synthesis of 5-hydroxymethylfurfural (5-HMF) from glucose was performed to investigate the activities of synthesized catalysts. Benefiting from the synergistic effects of the acid-base bi-functional active sites, the highest 5-HMF yield of 54.9% was achieved in an isopropanol-mediated DMSO system, under the optimal conditions. Moderate to excellent yields of 5-HMF were also obtained from one-pot conversions of other carbohydrates, including inulin , sucrose, cellobiose, maltose and starch , with our developed catalytic system. The one-pot production of 5-HMF from cellulose was also smoothly processed by the g-C 3 N 4 supported UiO-66-type MOFs catalysts in an IL-based system. This work offers a versatile strategy for developing supported UiO-66-type MOFs catalyst for a wide range of biomass transformation to platform chemicals.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Shi-Wen Lv,Jing-Min Liu,Ning Zhao,Chun-Yang Li,Fei-Er Yang,Zhi-Hao Wang,Shuo Wang
Photocatalysis is a promising strategy to remove contaminants from wastewater. Herein, a novel g-C 3 N 4 @CoFe 2 O 4 /Fe 2 O 3 composite was synthesized via a feasible hydrothermal and calcination method. Benefiting from the Z-scheme heterojunction formed between MOF-derived CoFe 2 O 4 /Fe 2 O 3 and g-C 3 N 4 , the recombination of photoinduced electrons and holes could be inhibited effectively. Meanwhile, doping a little amount of MOF-derived CoFe 2 O 4 /Fe 2 O 3 could remarkably enhance visible light absorption ability of g-C 3 N 4 and reduce band gap of g-C 3 N 4 . Then, the resulting hybrid photocatalysts were employed as a high-efficient mediator to activate persulfate for degrading emergent organic contaminants under visible light irradiation. Significantly, TC of 99.7%, BPA of 98.1%, SMX of 94.8%, DFC of 97.0%, IBP of 96.1% and OFX of 96.5% could be removed within 80 min. Some important factors influencing photocatalytic degradation process were also investigated. The trapping experiments and EPR tests revealed that both SO 4 − and OH were involved in photocatalytic reaction. Besides, the introduction of MOF-derived CoFe 2 O 4 /Fe 2 O 3 provided a new approach for generating radical species. More importantly, obtained g-C 3 N 4 @CoFe 2 O 4 /Fe 2 O 3 -2 composites with good stability exhibited great application potential in the actual degradation tests. To sum up, current work provided novel ideas for photocatalytic oxidation technology in the organic pollution degradation.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Man-Man Wang,Zi-Ling Li,Han Wu,Ke-Yan Chen,Fan Guo,Gui-Fu Zuo,Yu He,Xue-Bo Yin
Magnetic solid-phase extraction (MSPE) was developed based on a well-designed Fe 3 O 4 -NH 2 @g-C 3 N 4 nanocomposite as sorbent for a mixture of six benzophenones (BPs) in environmental water samples. The composite fabricated via in-situ self-assembled g-C 3 N 4 shell with homogeneous polymerization of cyanuric chloride and cyanuric acid on Fe 3 O 4 -NH 2 core. While high adsorption capacity was derived from g-C 3 N 4 via hydrophobic, π-π and hydrogen bonding interactions to the targets, the fast magnetic separation was realized with Fe 3 O 4 core for less solvent consumption. In combination with LC-MS/MS, the Fe 3 O 4 -NH 2 @g-C 3 N 4 sorbent minimized the interfering components, reduced the matrix effects, and provided the enrichment factors of 121–150 for six BPs with relative standard deviations ≤ 9.7% even after 20 times extraction-desorption cycles. The present method gave the detection limits of 0.3–2.5 ng/L for six BPs with the linear ranges of 1.0–2000 ng/L, and the recoveries of 84.6%−104% in sea water and 86.2%−107% in lake water samples. Thus, the Fe 3 O 4 -NH 2 @g-C 3 N 4 -based MSPE coupled with LC-MS/MS method provided a convenient, efficient, and reliable alternative to monitor trace BPs in environmental water samples.
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PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Kexin Li,Ziai Huang,Suiyi Zhu,Shenglian Luo,Liushui Yan,Yuhua Dai,Yihang Guo,Yuxin Yang
A series of biochar-coupled graphitic carbon nitride nanosheets (BPCMSs/g-C 3 N 4 NSs) composites was successfully fabricated through a simple two-step calcination strategy by using waste Camellia oleifera shells (WCOSs) and melamine as raw materials. Hexavalent chromium [Cr(VI)] or total chromium (T-Cr) in water could be completely removed or mostly recovered through adsorption combined with photocatalytic reduction by using the as-prepared BPCMSs/g-C 3 N 4 NSs. The adsorbed Cr(VI) on BPCMSs/g-C 3 N 4 NSs could be reduced by photogenerated electrons into trivalent chromium ions (Cr 3+ ) and stably fixed on BPCMSs/g-C 3 N 4 NSs after strengthening. Interestingly, we found that the photocatalytic activity of the recycled Cr 3+ /BPCMSs/g-C 3 N 4 NSs was remarkably improved compared with that of the fresh BPCMSs/g-C 3 N 4 NSs for the degradation of aqueous organic pollutants . We tested the photocatalytic performance of the recycled Cr 3+ /BPCMSs/g-C 3 N 4 NSs in the combined pollution system containing Cr(VI) and 4-fluorophenol (4-FP) and observed that a synergistic photocatalytic effect occurred in the Cr(VI)/4-FP combined pollution system under acidic and neutral conditions.
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高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Zhenyu Chen,Teng Li,Lifen Liu
Treatment of chemical industrial wastewater often faces problems of large volume occupation, high cost, and long processing time. In this study, low-content Ce-modified g-C 3 N 4 was prepared and used as a catalyst on stainless steel mesh photo-cathode in constructing a multi-stage cascade microbial fuel cell system to reduce treatment costs in an energy-saving way. The large specific surface area (332.5 m 2 g −1 ) and mesoporous structure of the material, is favorable for catalytic reactions, in which Ce elements were mainly present in single atoms . The characterized catalyst indicated a pronounced effect of Ce species in increasing photo-current and the synergistic pollutant removal , microbial bio-degradation and cascade operation stability. In Batch-mode (light illumination, aeration, total HRT (hydraulic residence time) of 54 h) treatment through three cascade reactors, removed 88% COD (Chemical Oxygen Demand). With 0.5 mM PMS (peroxymonosulfate), 94% COD and 86% NH 4 + -N of the system were removed. The cascade net average COD removal capacity reached 16.04 kg per kg catalyst per day. The addition of PMS also enhanced the electricity generation. In continuous-mode, in totally 18 h treatment through the three-stages cascade reactors without PMS, overall, 83% COD and 78% TOC (Total Organic Carbon) were removed, reaching a net calculated system average COD removal capacity of 19.29 kg per kg catalyst per day. With Ce-g-C 3 N 4 catalyst, the batch or continuous multi-stage cascade system demonstrated great technical flexibility and economic potential in treating high-strength, high-salinity amine-rich industrial wastewater.
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PubMed
高影响因子
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