Preparation of multi-defect state photo-responsive N-GQDs/CuS/Cv-CNNs materials and study of their properties
Ren Y. Wang L. Zhao H. Li H. Niu X. Chen L. Zhang D. Fan H. Wang K.
1 April 2025Elsevier Ltd
Materials Chemistry and Physics
2025#334
The imperative detection and elimination of hexavalent Cr(VI), a potent environmental pollutant and living organism hazard, is paramount for ecological conservation. The precipitation technique and charge action principles were used in this work to synthesis a cost-effective multi-defect nitrogen-doped graphene quantum dots/copper sulfide/carbon nitride composite photo-responsive materials (N-GQDs/CuS/Cv-CNNs, N-GCC) with good performance. To improve Cr(VI) detection and removal efficiency, multiple-point defects were generated to optimize the materials electrical structure and photo-responsivity. The multi-point defects were proved to greatly improve the light absorption of N-GCC, photosensitivity and consequently, the recognition rate of Cr(VI). The electron-rich multi-point defect structure accelerated the electrostatic adsorption and photoreduction of Cr(VI), which made the rapid removal of high Cr(VI) concentration possible, and it could remove 95.76 % of 120 mg/L Cr(VI) in 50 min with the specific surface area of N-GCC of 28.81 m2/g only. This study reveals the great potential of multi-point defect structures in treating Cr(VI) heavy metal pollution and opens up a new pathway for the remediation of chromium-contaminated environments.
Adsorption-photocatalytic synergy , Cr(VI) , Doping , PEC detection , Surface defect engineering
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School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China
Chemistry Department, Nazarbayev University, Astana, 010000, Kazakhstan
School of Petrochemical Technology
Chemistry Department
10 лет помогаем публиковать статьи Международный издатель
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