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首页> 外文期刊>RSC Advances >Visible light driven efficient photocatalytic degradation of Congo red dye catalyzed by hierarchical CuS-Bi2CuxW1-xO6-2x nanocomposite system
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Visible light driven efficient photocatalytic degradation of Congo red dye catalyzed by hierarchical CuS-Bi2CuxW1-xO6-2x nanocomposite system

机译：可见光推动刚果红染料的高效光催化降解等级CUS-Bi2Cuxw1-XO6-2x纳米复合体系催化

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摘要

A series of CuS-Bi2CuxW1-xO6-2x nanocomposite materials were prepared and evaluated as photocatalyst for degradation of Congo red dye from aqueous sources. The Bi2WO6 (BT) nanoparticles were synthesized by amorphous citrate process. The CuS nanomaterials were dispersed over the BT matrix using hydrothermal route. The composite materials (CuSBT) were characterized using XRD, FESEM, TEM, XPS, UV-Vis-DRS, PL, sorptometric and FTIR techniques. XRD study indicated the existence of hexagonal covellite CuS and orthorhombic Russellite BT phase. During hydrothermal treatment, the Cu2+ ions substituted for the W6+ ions in the BT lattice to form a substitutional solid solution (Bi2CuxW1-xO6-2x). The composite materials contain CuS nanorods and BT nanosheets. During hydrothermal treatment, significant morphological reorganization of the BT phase took place leading to the formation of flower like hierarchical nanostructures. The CuSBT materials possess characteristic features of a type-II heterojunction exhibiting narrow band gap, enhanced visible light absorption and efficient charge separation properties. The CuSBT materials were evaluated as visible light active photocatalyst for complete degradation of Congo red dye using H2O2 as oxidant. The CuSBT materials exhibited higher apparent rate constant (K-app) and greater efficiency for Congo red degradation compared to pure BT material. The photocatalytic protocol developed in this work was significant in terms of minimum and efficient use of catalyst and oxidant, less irradiation time and its applicability for aqueous effluents containing higher concentration of the dye.
机译：一系列的CuS-Bi2CuxW1-xO6-2x纳米复合物材料的制备和评价为光催化剂用于从含水源刚果红染料的降解。通过无定形柠檬酸盐法合成Bi2WO6（BT）纳米颗粒。使用水热途径将CU纳米材料分散在BT基质上。使用XRD，FESEM，TEM，XPS，UV-Vis-DRS，PL，Sorptometric和FTIR技术表征复合材料（CUSBT）。 XRD研究表明六角形环素CU和矫正ruShellite BT相的存在。在水热处理期间，Cu2 +离子取代于BT晶格中的W6 +离子，形成取代固体溶液（Bi2cuxw1-XO6-2x）。复合材料含有CUS纳米棒和BT纳米片。在水热处理期间，BT相的显着形态重组导致形成花朵等分层纳米结构的形成。 CUSBT材料具有表现出窄带隙的II型异质结的特征特征，增强了可见光吸收和有效的电荷分离性能。 CUSBT材料被评价为可见光活性光催化剂，用于使用H 2 O 2作为氧化剂完全降解刚果红染料。与纯BT材料相比，CUSBT材料表现出更高的表观速率常数（K-APP）和更高的刚果红降解效率。本文开发的光催化方案在最小和有效地使用催化剂和氧化剂，较少的照射时间及其对含有较高浓度染料浓度的水性流出物的适用性方面具有重要意义。

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  • 来源
    《RSC Advances》 |2016年第42期|共13页
  • 作者

    Bhoi Yagna Prakash; Pradhan Swaraj Rashmi; Behera Chinmaya; Mishra B. G.;

  • 作者单位

    Natl Inst Technol Dept Chem Rourkela 769008 Odisha India;

    Natl Inst Technol Dept Chem Rourkela 769008 Odisha India;

    Natl Inst Technol Dept Chem Rourkela 769008 Odisha India;

    Natl Inst Technol Dept Chem Rourkela 769008 Odisha India;

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  • 正文语种 eng
  • 中图分类 化学;
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