Novel direct Z-scheme AgI/N–TiO2 photocatalyst for removal of polluted tetracycline under visible irradiation

Tùng, Mai Hùng Thanh; Cam, Nguyen Thi Dieu; Thuan, Doan Van; Quan, Pham Van; Hoàng, Cao Văn; Phương, Trần Thị Thu; Lam, Nguyen Tan; Tâm, Trương Thanh; Lệ, Nguyễn Thị Phương; Lan, Nguyen Thi; Thoai, Dang Nguyen; Pham, Thanh-Dong

doi:10.1016/j.ceramint.2019.11.058

Cited by 39 publications

(5 citation statements)

References 54 publications

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“…Thuốc kháng sinh là các hợp chất có độ ổn định sinh học cao, vì vậy việc áp dụng các phương pháp sinh học để xử lý loại bỏ các hợp chất này dường như không khả thi. Phương pháp oxi hóa tiên tiến, sử dụng các vật liệu xúc tác quang đã được ứng dụng rộng rãi để xử lý nhiều chất hữu cơ ô nhiễm do các ưu điểm chính như có tính kinh tế, tiến hành đơn giản và có thể phân huỷ triệt để các chất ô nhiễm hữu cơ [3]. WO3, một chất bán dẫn có năng lượng vùng cấm vào khoảng 2,9 eV, đang được xem là một chất xúc tác quang đầy tiềm năng do có thể được điều chế dễ dàng, giá thành thấp, không độc và ổn định tốt trong quá trình xúc tác [4].…”

Section: Giới Thiệu Chungunclassified

Synthesis of WO3/g-C3N4 Z-scheme heterojunction with novel photocatalytic activity for degradation of residual antibiotics in aquatic environment under visible light

Thuy¹,

Thi²,

Van³

et al. 2022

Vietnam j. catal. adsorp.

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In the research, we successfully synthesized WO3/g-C3N4 Z-scheme heterojunction for photocatalytic degradation of tetracycline. These synthesized materials have been characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR Spectroscopy), to investigate their crystal phase, morphology and chemical compositions. The synthesized WO3/g-C3N4 Z-scheme heterojunction exhibited novel photocatalytic activity for the degradation of Tetracyline even under visible light. This was due to photo-excited electrons in the conduction band of WO3 transferred to the valence band of the g-C3N4 preserving electrons in the conduction band of the g-C3N4 and holes in the valence band of WO3. These electrons and holes would react with oxygen and water to produce oxidative radicals for effective degradation of Tetracycline. The synthesized WO3/g-C3N4 photocatalytically degraded approximately 56 % Tetracycline 10 ppm when it was irradiated by visible light of 32 W for 90 mins.

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Section: Giới Thiệu Chungunclassified

Synthesis of WO3/g-C3N4 Z-scheme heterojunction with novel photocatalytic activity for degradation of residual antibiotics in aquatic environment under visible light

Thuy¹,

Thi²,

Van³

et al. 2022

Vietnam j. catal. adsorp.

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“…According to the above formula (6), supposing that ε r is known for most of the semiconductors, the N d of the nanocomposite can be calculated from the tangent slope and the ε r of the nanomaterials.…”

Section: Mott-schottky Testmentioning

confidence: 99%

“…Photocatalytic oxidation mainly refers to the conversion of organic pollutants to nontoxic substances such as carbon dioxide, water, and inorganic substances via an oxidation and decomposition reaction under light and normal temperature/pressure [4]. Titanium dioxide (TiO 2 ) has become one of the most important photocatalysts, because of its high photocatalytic activity and good chemical stability, along with its low cost, non-toxicity, and strong photocorrosion resistance [5][6][7][8][9][10][11][12]. However, inherent properties of TiO 2 , such as the large band gap, small response range to light, and recombination of electron-hole pairs, hinder large-scale application, so it is necessary to explore new photocatalysts to obtain optimal photocatalytic performance [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Oxygen-Deficient WO3/TiO2/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue

et al. 2021

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At present, TiO2 is one of the most widely used photocatalytic materials. However, the narrow response range to light limits the photocatalytic performance. Herein, we reported a successful construction of self-doped R-WO3/R-TiO2/CC nanocomposites on flexible carbon cloth (CC) via electrochemical reduction to increase the oxygen vacancies (Ovs), resulting in an enhanced separation efficiency of photo-induced charge carriers. The photocurrent of R-WO3/R-TiO2/CC at −1.6 V (vs. SCE) was 2.6 times higher than that of WO3/TiO2/CC, which suggested that Ovs could improve the response to sunlight. Moreover, the photocatalytic activity of R-WO3/TiO2/CC was explored using methylene blue (MB). The degradation rate of MB could reach 68%, which was 1.3 times and 3.8 times higher than that of WO3/TiO2/CC and TiO2/CC, respectively. Furthermore, the solution resistance and charge transfer resistance of R-WO3/R-TiO2/CC were obviously decreased. Therefore, the electrochemical reduction of nanomaterials enabled a promoted separation of photogenerated electron–hole pairs, leading to high photocatalytic activity.

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“…Since 1979, when Inoue reported the ability of semiconductor photocatalysts to reduce CO 2 in water to organic compounds . Researchers have developed a number of semiconductor photocatalysts for photocatalysis, which can be categorized into the six categories below (1) metal oxides, such as TiO 2 , , ZnO; , (2) metal sulfides, such as CdS, ZnS, ZnIn 2 S 4 ; (3) metal nitrides and phosphides, such as GaN, Ni 2 P; (4) layered metal hydroxides, such as NiAl-LDH, MgAl-LDH; (5) metal–organic framework materials (MOFs); and (6) nonmetallic semiconductors, such as g-C 3 N 4 . , …”

Section: Introductionmentioning

confidence: 99%

Recent Progress and Perspectives of S-Scheme Heterojunction Photocatalysts for Photocatalytic CO₂ Reduction

Guo,

et al. 2023

Energy Fuels

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Photocatalytic CO2 reduction (PCO2RR) is regarded as a promising means to mitigate the effects of climate change and current energy shortage. However, photocatalysis is not very effective because of the rapid recombination of photogenerated electron–hole pairs. S-scheme heterojunctions can effectively separate photogenerated carriers and significantly improve the redox ability of photocatalysts. In recent years, S-scheme heterojunction photocatalysts have become a popular topic of research because of their superior photocatalytic performance. This review examines the recent research advancements in S-scheme heterojunction photocatalysts. First, the principle of PCO2RR is briefly introduced. Various types of heterojunctions are introduced, the charge transfer mechanisms and characterization methods of S-scheme heterojunctions are described, and the applications of metal oxides, metal sulfides, and other S-scheme photocatalysts in CO2 reduction are discussed and reviewed, respectively. In conclusion, the limitations and prospective directions of S-scheme heterojunction photocatalysts in CO2 photoreduction are discussed to provide direction for the design of high-performance S-scheme heterojunction photocatalysts.

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Novel direct Z-scheme AgI/N–TiO2 photocatalyst for removal of polluted tetracycline under visible irradiation

Cited by 39 publications

References 54 publications

Synthesis of WO3/g-C3N4 Z-scheme heterojunction with novel photocatalytic activity for degradation of residual antibiotics in aquatic environment under visible light

Synthesis of WO3/g-C3N4 Z-scheme heterojunction with novel photocatalytic activity for degradation of residual antibiotics in aquatic environment under visible light

Oxygen-Deficient WO3/TiO2/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue

Recent Progress and Perspectives of S-Scheme Heterojunction Photocatalysts for Photocatalytic CO₂ Reduction

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Novel direct Z-scheme AgI/N–TiO2 photocatalyst for removal of polluted tetracycline under visible irradiation

Cited by 39 publications

References 54 publications

Synthesis of WO3/g-C3N4 Z-scheme heterojunction with novel photocatalytic activity for degradation of residual antibiotics in aquatic environment under visible light

Synthesis of WO3/g-C3N4 Z-scheme heterojunction with novel photocatalytic activity for degradation of residual antibiotics in aquatic environment under visible light

Oxygen-Deficient WO3/TiO2/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue

Recent Progress and Perspectives of S-Scheme Heterojunction Photocatalysts for Photocatalytic CO2 Reduction

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Product

Resources

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Recent Progress and Perspectives of S-Scheme Heterojunction Photocatalysts for Photocatalytic CO₂ Reduction