Dataset Information

One-Step Synthesis Heterostructured g-C?N?/TiO? Composite for Rapid Degradation of Pollutants in Utilizing Visible Light.

ABSTRACT: To meet the urgent need of society for advanced photocatalytic materials, novel visible light driven heterostructured composite was constructed based on graphitic carbon nitride (g-C?N?) and fibrous TiO?. The g-C?N?/TiO? (CNT) composite was prepared through electrospinning technology and followed calcination process. The state of the g-C?N? and fibrous TiO? was tightly coupled. The photocatalytic performance was measured by degrading the Rhodamine B. Compared to commercial TiO? (P25^®) and electrospun TiO? nanofibers, the photocatalytic performance of CNT composite was higher than them. The formation of CNT heterostructures and the enlarged specific surface area enhanced the photocatalytic performance, suppressing the recombination rate of photogenerated carriers while broadening the absorption range of light spectrum. Our studies have demonstrated that heterostructured CNT composite with an appropriate proportion can rational use of visible light and can significantly promote the photogenerated charges transferred at the contact interface between g-C?N? and TiO?.

SUBMITTER: Liu H

PROVIDER: S-EPMC6215260 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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One-Step Synthesis Heterostructured g-C₃N₄/TiO₂ Composite for Rapid Degradation of Pollutants in Utilizing Visible Light.

Liu Hui H Zhang Zhi-Guang ZG He Hong-Wei HW Wang Xiao-Xiong XX Zhang Jun J Zhang Qian-Qian QQ Tong Yan-Fu YF Liu Hong-Ling HL Ramakrishna Seeram S Yan Shi-Ying SY Long Yun-Ze YZ

Nanomaterials (Basel, Switzerland) 20181016 10

To meet the urgent need of society for advanced photocatalytic materials, novel visible light driven heterostructured composite was constructed based on graphitic carbon nitride (g-C₃N₄) and fibrous TiO₂. The g-C₃N₄/TiO₂ (CNT) composite was prepared through electrospinning technology and followed calcination process. The state of the g-C₃N₄ and fibrous TiO₂ was tightly coupled. The photocatalytic performance was measured by degrading the Rhodamine B. Compared to commercial TiO₂ (P25<sup>®</sup>) ...[more]

PMID: 30332837

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Project description:Creation of an innovative composite photocatalyst, to advance its performance, has attracted researchers to the field of photocatalysis. In this article, a new photocatalyst based on polyaniline/reduced graphene oxide (PANI/RGO) composites has been prepared via the in situ oxidative polymerization method employing RGO as a template. For thermoelectric applications, though a higher percentage (50 wt %) of RGO has been used, for photocatalytic activity, lesser percentages (2, 5, and 8 wt %) of RGO in the composite have given a significant outcome. Furthermore, photoluminescence (PL) spectra, time-resolved fluorescence spectra, and Brunauer-Emmett-Teller surface area analyses confirmed the improved photocatalytic mechanism. PANI/RGO composites under visible light irradiation exhibit amazingly improved activity toward the degradation of cationic and anionic dyes in comparison with pristine PANI or RGO. Here, a PANI/RGO composite, with 5 wt % RGO(PG2), has emerged as the best combination with the degradation percentages of 99.68, 99.35, and 98.73 for malachite green, rhodamine B, and congo red within 15, 30, and 40 min, respectively. Experimental findings show that the introduction of RGO can relieve the agglomeration of PANI nanoparticles and enhance the light absorption of the materials due to an increased surface area. Moreover, the PG2 composite also showed excellent photocatalytic activity to reduce noxious Cr(VI). The effective removal of Cr(VI) up to 94.7% at pH 2 was observed within only 15 min. With the help of the active species trapping experiment, a plausible mechanism for the photocatalytic degradation has been proposed. The heightened activity of the as-synthesized composite compared to that of neat PANI or RGO was generally because of high concentrations of •OH radicals and partly of •O2 - and holes (h+) as concluded from the nitroblue tetrazolium probe test and photoluminescence experiment. It is hoped that the exceptional photocatalytic performance of our work makes the conducting polymer-based composite an effective alternative in wastewater treatment for industrial applications.

Dataset Information

One-Step Synthesis Heterostructured g-C?N?/TiO? Composite for Rapid Degradation of Pollutants in Utilizing Visible Light.

Publications

One-Step Synthesis Heterostructured g-C₃N₄/TiO₂ Composite for Rapid Degradation of Pollutants in Utilizing Visible Light.

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