N, Cu co-doped TiO2@functionalized SWCNT photocatalyst coupled with ultrasound and visible-light: An effective sono-photocatalysis process for pharmaceutical wastewaters treatment

Isari, Ali Akbar; Hayati, Farzan; Kakavandi, Babak; Rostami, Mostafa; Motevassel, Mohsen; Dehghanifard, Emad

doi:10.1016/j.cej.2019.123685

Cited by 209 publications

(65 citation statements)

References 61 publications

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“…[69][70][71][72][73] For example, a two-step sol-gel/ hydrothermal method has been developed for the synthesis of Cu, N-codoped TiO 2 . [72] After doping, photocatalytic activity of TiO 2 is accelerated significantly, the removal efficiency of 100% and 89% is obtained for sulfamethoxazole and total organic carbon, respectively, under visible light. This catalyst is recyclable after six consecutive runs with an insignificant decrease in performance, indicating the excellent stability.…”

Section: Metal-nonmetal Codopingmentioning

confidence: 99%

“…As typical ones, metal, N‐codoped TiO 2 materials have been studied extensively. [ 69–73 ] For example, a two‐step sol–gel/hydrothermal method has been developed for the synthesis of Cu, N‐codoped TiO 2 . [ 72 ] After doping, photocatalytic activity of TiO 2 is accelerated significantly, the removal efficiency of 100% and 89% is obtained for sulfamethoxazole and total organic carbon, respectively, under visible light.…”

Section: Bandgap Engineeringmentioning

confidence: 99%

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Visible‐Light Responsive TiO₂‐Based Materials for Efficient Solar Energy Utilization

Zhang

et al. 2020

Advanced Energy Materials

150

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currents, geothermal, biomass, and solar, have been developed as alternatives. Among them, solar energy is the most abundant, inexpensive, nonpolluting, and sustainable. [5][6][7][8] Some semiconductors, so called photocatalysts, which possess the capacity to harvest solar energy to drive catalytic reactions for valuable chemical production, have been designed and fabricated to achieve efficient solar energy utilization. [9][10][11][12][13][14][15][16][17][18][19] Typically, TiO 2 is recognized as one of the most promising candidates due to its chemical stability, nontoxicity, and high resistance to photocorrosion. [20][21][22][23][24][25] In general, TiO 2 possesses three major phases, including anatase, rutile and brookite, and many other minor phases, such as monoclinic TiO 2 (B). All of them have wide bandgaps of 3.0-3.2 eV. Hence, TiO 2 can only absorb ultraviolet light (UV), while the visible light accounting for ≈43% of solar energy cannot be utilized. Furthermore, the rapid recombination of photogenerated electrons and holes severely limits its quantum efficiency. Thus, overall photocatalytic activity of TiO 2 is very limited, especially under visiblelight irradiation. [26][27][28] A complete photocatalytic reaction using TiO 2 -based photocatalysts involves three major steps: i) light absorption and The photocatalytic properties of TiO 2 have aroused a broad range of research interest since 1972 due to its abundance, chemical stability, and easily available nature. To increase its overall activity, in the past few decades, much effort has been devoted to the fabrication of advanced TiO 2 -based photocatalysts with visible-light response and these photocatalysts have shown great potential in the field of solar energy utilization. Here, recent progress in the investigation of visible-light responsive TiO 2 -based materials are reviewed. Notably, the fabrication strategies and corresponding chemical/ physical properties of visible-light responsive TiO 2 -based materials are described in detail, with a focus on bandgap engineering and junction engineering from the perspective of light absorption, charge transfer and separation, and surface reactions. Their applications in solar-fuel production, organic synthesis, bacterial disinfection, pollutant degradation and nitrogen fixation are also discussed. Moreover, the new trends and ongoing challenges in this field are proposed and highlighted.

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Section: Metal-nonmetal Codopingmentioning

confidence: 99%

Section: Bandgap Engineeringmentioning

confidence: 99%

Visible‐Light Responsive TiO₂‐Based Materials for Efficient Solar Energy Utilization

Zhang

et al. 2020

Advanced Energy Materials

150

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“…S. Rajoriya et al [ 94 ] reported the photodegradation of 4-acetamidophenol to 91% using Sm (samarium) and N-doped TiO 2 photocatalysts, in which a combination of UV radiation, hydrodynamic cavitation, and ultrasound was applied. In another work, the use of N and Cu-doped TiO 2 @CNTs in sono-photocatalysis for purification of pharmaceutical wastewater is discussed [ 95 ]. The results showed that when using a commercial Xe lamp (50 W) and ultrasound for pharmaceutical wastewaters treatment, the photocatalyst removal efficiency within 180 min were 100, 93, and 89% for sulfamethoxazole, chemical oxygen demand, and total organic carbon, respectively.…”

Section: The Utilization Of Photocatalysts Based On Tiomentioning

confidence: 99%

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

et al. 2020

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The growth of industrialization, which is forced to use non-renewable energy sources, leads to an increase in environmental pollution. Therefore, it is necessary not only to reduce the use of fossil fuels to meet energy needs but also to replace it with cleaner fuels. Production of hydrogen by splitting water is considered one of the most promising ways to use solar energy. TiO2 is an amphoteric oxide that occurs naturally in several modifications. This review summarizes recent advances of doped TiO2-based photocatalysts used in hydrogen production and the degradation of organic pollutants in water. An intense scientific and practical interest in these processes is aroused by the fact that they aim to solve global problems of energy conservation and ecology.

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“…The increase of PhACs concentration raises essential issues to traditional wastewater treatment [ 85 , 86 , 87 ] and requires the involvement of novel processes such as photocatalysis [ 88 , 89 , 90 ]. The literature mentions a high number of PhACs investigated in AOP experiments, between the most representative are: TC, CIP, TCS, CBZ, SA, IBS and SMZ.…”

Section: Photocatalytic Organic Pollutants Removal By Heterostructmentioning

confidence: 99%

The Influence of Photoactive Heterostructures on the Photocatalytic Removal of Dyes and Pharmaceutical Active Compounds: A Mini-Review

Eneşca

Andronic

2020

Nanomaterials

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The diversification of pollutants type and concentration in wastewater has underlined the importance of finding new alternatives to traditional treatment methods. Advanced oxidation processes (AOPs), among others, are considered as promising candidate to efficiently remove organic pollutants such as dyes or pharmaceutical active compounds (PhACs). The present minireview resumes several recent achievements on the implementation and optimization of photoactive heterostructures used as photocatalysts for dyes and PhACs removal. The paper is focused on various methods of enhancing the heterostructure photocatalytic properties by optimizing parameters such as synthesis methods, composition, crystallinity, morphology, pollutant concentration and light irradiation.

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N, Cu co-doped TiO2@functionalized SWCNT photocatalyst coupled with ultrasound and visible-light: An effective sono-photocatalysis process for pharmaceutical wastewaters treatment

Cited by 209 publications

References 61 publications

Visible‐Light Responsive TiO₂‐Based Materials for Efficient Solar Energy Utilization

Visible‐Light Responsive TiO₂‐Based Materials for Efficient Solar Energy Utilization

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

The Influence of Photoactive Heterostructures on the Photocatalytic Removal of Dyes and Pharmaceutical Active Compounds: A Mini-Review

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N, Cu co-doped TiO2@functionalized SWCNT photocatalyst coupled with ultrasound and visible-light: An effective sono-photocatalysis process for pharmaceutical wastewaters treatment

Cited by 209 publications

References 61 publications

Visible‐Light Responsive TiO2‐Based Materials for Efficient Solar Energy Utilization

Visible‐Light Responsive TiO2‐Based Materials for Efficient Solar Energy Utilization

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

The Influence of Photoactive Heterostructures on the Photocatalytic Removal of Dyes and Pharmaceutical Active Compounds: A Mini-Review

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Visible‐Light Responsive TiO₂‐Based Materials for Efficient Solar Energy Utilization

Visible‐Light Responsive TiO₂‐Based Materials for Efficient Solar Energy Utilization