INORGANIC CHEMISTRY COMMUNICATIONS
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2023
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IF 3.8
Hadeel A. Khayoon,Mohammed Ismael,Abbas Al-nayili,Hassan A. Alshamsi
LaFeO 3 -nitrogen deficient g-C 3 N 4 (LaFeO 3 -g-C 3 N 4 -H) heterostructure has been fabricated obtaining thermal polymerization of acetic acid-treated melamine followed by incorporation of perovskite-type LaFeO 3 onto the graphitic carbon nitride nanosheets (g-C 3 N 4 ) using La(NO 3 ) 3 ·6H 2 O and Fe(NO 3 ) 3 ·9H 2 O as precursors. The as-synthesized nanocomposite was investigated using Fourier Transform Infrared Spectroscopy (FT-IR), powder X-ray diffraction (XRD), UV–Vis Diffuse Reflection Spectroscopy (UV–Vis DRS), Scanning Electron microscope (SEM), and Transmission Electron microscope (TEM). The findings of the characterization study revealed the successful incorporation of LaFeO 3 on g-C 3 N 4 -H nanosheets. The band gap energy of LaFeO 3 -g-C 3 N 4 -H heterojunctions was found to be active in the visible light region. The LaFeO 3 -g-C 3 N 4 -H ability to degrade Rhodamine B (RhB) dye in an aqueous solution was investigated under sunlight illumination. The results of photocatalytic degradation activity showed that LaFeO 3 -g-C 3 N 4 -H photocatalyst has presented the highest photocatalytic efficiency of 99.5% after 60 min under sunlight irradiation. The remarkable photocatalytic activity can be attributed to the defect structure of g-C 3 N 4 and the construction of heterojunction. In addition, LaFeO 3 -g-C 3 N 4 -H showed promise recyclability after 5 cycles with slight activity reduction.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Dong Chen,Rui Zhang,Jie He,Maoqin Xu,Zixi Li,Yujie Liu,Dongyuan Li
A nitrogen-deficient g-C 3 N 4 -BiOBr-Bi 2 WO 6 /PVDF composite ultrafiltration membrane with high-efficiency retention and degradation capabilities for various dyes and antibiotics was prepared using a simple in situ deposition combined with phase inversion method. Under normal pressure, the membrane achieved a retention rate of over 95 % for multiple dyes, featured numerous hydrophilic sites, and demonstrated an average pollutant flux of 147.6L·m −2 ·h −1 . In a simulated visible solar light flow-circulation device, the composite membrane exhibited excellent efficiency and final degradation performance, achieving a degradation rate of 97.7 % for RhB within 1 h and a final degradation rate of 99.6 %. DFT calculations provided evidence for the potential distribution and interaction forces between nanoparticles and PVDF molecules, supporting the observed results. The in situ synthesized BiOBr nanomaterials grow and embed within the membrane, forming heterojunctions with an internal electric field alongside other materials. The incorporation of heterojunction materials improves the surface and internal physical structure of the PVDF membrane, endowing it with excellent photocatalytic degradation performance, enhanced hydrophilicity, and improved retention capabilities. Additionally, the composite membrane exhibits outstanding self-cleaning properties. This work provides a broad-spectrum and efficient solution for water pollution treatment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
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IF 1.6
Zhao Hongling,Fang Ranjie,Hu Maosong,Luo Jianqiang,Meng Cheng,Liu Shujuan,Ma Jianguo
In this work, a novel Fe/ND-CN composite was synthesized by anchoring iron single atoms onto nitrogen-deficient g-C 3 N 4 (ND-CN) using Fe-ZIF-8 as a precursor via calcination. This material served as a photoelectrocatalytic working electrode for U(VI) reduction under light and applied voltage. Remarkably, it achieved near-complete U(VI) removal (99.2%) at pH 5.0. The elucidated mechanism provides a highly efficient technique and theoretical foundation for low-concentration uranium wastewater treatment.
研究领域:
环境科学
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材料工程
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核化学
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水处理技术
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产品关联
DOI
高影响因子
CHEMOSPHERE
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2020
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IF 5.778
Ren He,Kehui Xue,Jing Wang,Ying Yan,Yi Peng,Tianli Yang,Yunchu Hu,Wenlei Wang
The direct shedding of piperazine rings is critical for the degradation of antibiotic persistent organic pollutants. In this work, nitrogen-deficient g-C 3 N 4 loaded with polyoxometalates porous photocatalysts with P–N heterojunctions were carried out through the formation of chemical bonds between the nitrogen-deficient C + in g-C 3 N x and the bridging oxygen in polyoxometalates (POMs), including phosphomolybdic acid (PMA), phosphotungstic acid (PTA) and silicotungstic acid (STA). The adsorption and photocatalysis experiments confirm the ability of the g-C 3 N x /POMs nanosheets to efficiently remove ciprofloxacin via the synergistic effects of adsorption and photo-catalysis. Approximately, g-C 3 N x /POMs-30 exhibits the optimal degradation ability, and the degradation rates of g-C 3 N x /PMA-30, g-C 3 N x /PTA-30 and g-C 3 N x /STA-30 could respectively reach 93.1%, 97.4% and 95.6% within only 5 min under visible light. The free radical scavenging experiment and ESR free radical capture experiments confirm that ·OH and ·O 2 − are free radicals that effectively degrade CIP. According to the results of the LC-MS analysis, the intermediates produced after CIP degradation and the efficient degradation pathway are proposed. The direct shedding of piperazine rings in the decarboxylation and defluorination process leads to the most efficient degradation of CIP into the small molecules.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2020
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IF 3.306
Hanjie Ren,Dong Yang,Fei Ding,Ke An,Zhanfeng Zhao,Yao Chen,Zhiyuan Zhou,Wenjing Wang,Zhongyi Jiang
Porous nitrogen-deficient graphic carbon nitride (PNCN) was fabricated by using acetic acid (HAc)-treated melamine as precursor via one-pot method. The as-prepared PNCN photocatalysts possess a loose porous structure with nitrogen deficiencies due to the decomposition of HAc during calcination process. The PNCN photocatalyst exhibits the rate constant of RhB degradation (1.92 h −1 ) and H 2 evolution rate (257.5 μmol g −1 h −1 ) for ∼4.6 and ∼2.5 times of pristine g-C 3 N 4 under visible light irradiation, respectively. The mesoporous structure can increase the specific surface area of PNCN (19.24 m 2 g -1 ), thereby rendering ample active sites and facilitating visible-light utilization. The moderate nitrogen deficiencies can not only substantially enhance photocurrent density and interfacial charge transfer, but also restrain the recombination of photo-generated carriers. In addition, the density functional theory (DFT) calculation further provides insight into the photocatalytic mechanism over PNCN. This study may present a facile and scalable method to fabricate PNCN with superior photocatalytic performance, which may hold great promise in practical applications.
研究领域:
材料科学
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化学工程
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环境科学
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催化
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）