Photocatalytic degradation of norfloxacin using N-doped TiO2: Optimization, mechanism, identification of intermediates and toxicity evaluation

Jin, Xindie; Zhou, Xiaoqin; Sun, Peng; Lin, Shuyao; Cao, Wenbin; Li, Zifu; Liu, Wenxiu

doi:10.1016/j.chemosphere.2019.124433

Cited by 113 publications

(30 citation statements)

References 31 publications

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“…As a result, the light response range was expanded. Doping non-metallic elements could increase the impurity level in the forbidden band of TiO 2 and help the band energy level keep higher than the reduction level, where the energy level of TiO 2 are overlap [71][72][73]. Asahi et al [74] first replaced a small amount of lattice oxygen in TiO 2 with non-metallic element N doping, and successfully achieved visible light catalytic activity of TiO 2 .…”

Section: Non-metal Element Doping Modificationmentioning

confidence: 99%

Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review

Zhou

2020

Catalysts

170

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A high-efficiency method to deal with pollutants must be found because environmental problems are becoming more serious. Photocatalytic oxidation technology as the environmentally-friendly treatment method can completely oxidate organic pollutants into pollution-free small-molecule inorganic substances without causing secondary pollution. As a widely used photocatalyst, titanium dioxide (TiO2) can greatly improve the degradation efficiency of pollutants, but several problems are noted in its practical application. TiO2 modified by different materials has received extensive attention in the field of photocatalysis because of its excellent physical and chemical properties compared with pure TiO2. In this review, we discuss the use of different materials for TiO2 modification, highlighting recent developments in the synthesis and application of TiO2 composites using different materials. Materials discussed in the article can be divided into nonmetallic and metallic. Mechanisms of how to improve catalytic performance of TiO2 after modification are discussed, and the future development of modified TiO2 is prospected.

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Section: Non-metal Element Doping Modificationmentioning

confidence: 99%

Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review

Zhou

2020

Catalysts

170

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“…Shah et al employed the as-synthesised Bi 3+ -Fe 2+ co-doped ZnO for NOFX degradation and attained 80% removal of 10 mg/L NOFX in 120 min using 1 g/L catalyst [91]. Jin et al used N-doped TiO 2 for NOFX degradation where 69.79% degradation of 12.5 mg/L NOFX was obtained after 30 min of visible light irradiation with 0.4 g/L of the photocatalyst [92]. The prepared Mn:ZnS QDs powder materials exhibit excellent degradation efficiency in comparison to other photocatalysts, due to the larger number of charge carriers caused by the addition of Mn as an impurity, and the differences in the arrival time of e − and h + at the photocatalyst surface.…”

Section: Identification Of Transformation Productsmentioning

confidence: 99%

“…Shah et al employed the as-synthesised Bi 3+ -Fe 2+ co-doped ZnO for NOFX degradation and attained 80% removal of 10 mg/L NOFX in 120 min using 1 g/L catalyst [91]. Jin et al used N-doped TiO2 for NOFX degradation where 69.79% degradation of 12.5 mg/L NOFX was obtained after 30 min of visible light irradiation with 0.4 g/L of the photocatalyst [92]. Figure 20 shows the recyclability of the Mn:ZnS QDs powder photocatalyst for the degradation of NOFX.…”

Section: Reusability Of Photocatalyst For Degradation Of Nofxmentioning

confidence: 99%

Assessing the Photocatalytic Degradation of Fluoroquinolone Norfloxacin by Mn:ZnS Quantum Dots: Kinetic Study, Degradation Pathway and Influencing Factors

Patel¹,

Singh²,

Carabineiro

2020

Nanomaterials

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Norfloxacin (NOFX), a broadly used fluoroquinolone antibiotic, has been a subject of great concern in the past few years due to its undesirable effect on human beings and aquatic ecosystems. In this study, novel Mn doped ZnS (Mn:ZnS) quantum dots (QDs) were prepared through a facile chemical precipitation method and used as photocatalysts for NOFX degradation. Prior to photodegradation experiments, morphological and optical parameters of the QDs were examined through transmission electron microscopy, scanning electron microscopy, energy dispersive X-ray analysis, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, fluorescence spectroscopy, Brunauer–Emmett–Teller analysis, and differential thermal and thermogravimetric analyses. Mn:ZnS QDs exhibited excellent properties of photodegradation, not only under UV irradiation but also in sunlight, which induced NOFX to photodegrade. The utmost photodegradation efficiency was obtained under optimal conditions (25 mL of NOFX, 15 mg/L, pH 10, 60 min UV irradiation, 60 mgs QDs), adopting first order kinetics. In addition, hydroxyl radicals produced by the conduction band electrons were found to be the primary reason dominating the transformation of NOFX in basic conditions, while holes, oxygen atoms, as well as the doped metal (Mn) enhanced the degradation. The QDs showed excellent reusability and stability in four repeated cycles. Finally, four different pathways were predicted, derived from the identified intermediates, with piperazinyl ring transformation being the primary one. It is expected that the synthesized Mn:ZnS QDs could be utilized as efficient photocatalytic materials for energy conversion and ecological remediation.

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“…KEYWORDS: Micropollutants, Norfloxacin, Direct photolysis, Advanced oxidative processes, Degradation. (WANG et al, 2018), além de produzir genes bacterianos com resistência antimicrobiana (JIN et al, 2019;LOPES et al, 1998;NIU et al, 2016…”

Section: Study Of the Competitive Action Between Chromium And Copper mentioning

confidence: 99%

Avaliação Do Binômio Saber Popular Versus Saber Científico De Plantas Medicinais No Conteúdo Programático Do 3º Ano Do Ensino Médio

Almeida¹,

Rodrigues²,

Maciel³

et al. 2020

A Química Nas Áreas Natural, Tecnológica E Sustentável 2

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Direitos para esta edição cedidos à Atena Editora pelos autores. Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição 4.0 Internacional (CC BY 4.0). O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. A Atena Editora não se responsabiliza por eventuais mudanças ocorridas nos endereços convencionais ou eletrônicos citados nesta obra. Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação.

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Photocatalytic degradation of norfloxacin using N-doped TiO2: Optimization, mechanism, identification of intermediates and toxicity evaluation

Cited by 113 publications

References 31 publications

Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review

Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review

Assessing the Photocatalytic Degradation of Fluoroquinolone Norfloxacin by Mn:ZnS Quantum Dots: Kinetic Study, Degradation Pathway and Influencing Factors

Avaliação Do Binômio Saber Popular Versus Saber Científico De Plantas Medicinais No Conteúdo Programático Do 3º Ano Do Ensino Médio

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