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作者:

Khurram, Rooha (Khurram, Rooha.) | Wang, Zhan (Wang, Zhan.) (学者:王湛) | Ehsan, Muhammad Fahad (Ehsan, Muhammad Fahad.) | Peng, Song (Peng, Song.) | Shafiq, Maryam (Shafiq, Maryam.) | Khan, Bushra (Khan, Bushra.)

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SCIE

摘要:

The leading challenge towards environmental protection is untreated textile dyes. Tailoring photocatalytic materials is one of the sustainable remediation strategies for dye treatment. Hematite (alpha-Fe2O3), due to its favorable visible light active band gap (i.e. 2.1 eV), has turned out to be a robust material of interest. However, impoverished photocatalytic efficiency of alpha-Fe2O3 is ascribable to the short life span of the charge carriers. Consequently, the former synthesized heterostructures possess low degradation efficiency. The aim of the proposed endeavor is the synthesis of a novel zinc telluride-modified hematite (alpha-Fe2O3/ZnTe) heterostructure, its characterization and demonstration of its enhanced photocatalytic response. The promising heterostructure as well as bare photocatalysts were synthesized via a hydrothermal approach. All photocatalysts were characterized by the X-ray diffraction technique (XRD), scanning electron microscopy (SEM), and electron diffraction spectroscopy (EDX). Moreover, the selectivity and activity of the photocatalyst are closely related to the alignment of its band energy levels, which were estimated by UV-Vis diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS). Nanomaterials, specifically alpha-Fe2O3 and alpha-Fe2O3/ZnTe, were used for the degradation of Congo red (97.9%), methyl orange (84%) and methylene blue (73%) under light irradiation (>200 nm) for 60 min. The results suggested that with the aforementioned optimized fabricated heterostructure, the degradation efficiency was improved in comparison to bare hematite (alpha-Fe2O3). The key rationale towards such improved photocatalytic response is the establishment of a type-II configuration in the alpha-Fe2O3/ZnTe heterostructure.

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作者机构:

  • [ 1 ] [Khurram, Rooha]Beijing Univ Technol, Dept Chem & Chem Engn, Beijing Key Lab Green Catalysis & Separat, Beijing, Peoples R China
  • [ 2 ] [Wang, Zhan]Beijing Univ Technol, Dept Chem & Chem Engn, Beijing Key Lab Green Catalysis & Separat, Beijing, Peoples R China
  • [ 3 ] [Peng, Song]Beijing Univ Technol, Dept Chem & Chem Engn, Beijing Key Lab Green Catalysis & Separat, Beijing, Peoples R China
  • [ 4 ] [Khan, Bushra]Beijing Univ Technol, Dept Chem & Chem Engn, Beijing Key Lab Green Catalysis & Separat, Beijing, Peoples R China
  • [ 5 ] [Khurram, Rooha]NUST, Sch Nat Sci SNS, Dept Chem, H-12, Islamabad, Pakistan
  • [ 6 ] [Ehsan, Muhammad Fahad]NUST, Sch Nat Sci SNS, Dept Chem, H-12, Islamabad, Pakistan
  • [ 7 ] [Shafiq, Maryam]NUST, Sch Nat Sci SNS, Dept Chem, H-12, Islamabad, Pakistan
  • [ 8 ] [Ehsan, Muhammad Fahad]Cape Breton Univ, Dept Chem, 1250 Grand Lake Rd, Sydney, NS B1P 6L2, Canada

通讯作者信息:

  • 王湛

    [Wang, Zhan]Beijing Univ Technol, Dept Chem & Chem Engn, Beijing Key Lab Green Catalysis & Separat, Beijing, Peoples R China;;[Ehsan, Muhammad Fahad]NUST, Sch Nat Sci SNS, Dept Chem, H-12, Islamabad, Pakistan;;[Ehsan, Muhammad Fahad]Cape Breton Univ, Dept Chem, 1250 Grand Lake Rd, Sydney, NS B1P 6L2, Canada

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来源 :

RSC ADVANCES

年份: 2020

期: 73

卷: 10

页码: 44997-45007

3 . 9 0 0

JCR@2022

ESI学科: CHEMISTRY;

ESI高被引阀值:33

JCR分区:2

被引次数:

WoS核心集被引频次: 13

SCOPUS被引频次: 16

ESI高被引论文在榜: 0 展开所有

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