Photocatalytic degradation of textile wastewater in presence of hydrogen peroxide: Effect of cerium doping titania

Touati, Azza; Hammedi, Tijani; Najjar, Wahiba; Ksibi, Zouhaier; Sayadi, Sami

doi:10.1016/j.jiec.2015.12.008

Cited by 73 publications

(31 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Organic dyes from textile production and other industrial processes are one of the main groups of pollutants in wastewater [1]. Azo dyes, including reactive black 5, methyl orange (MO), acid orange 7, represent 60 -70% of all organic dyes produced in the world.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Heterogeneous photo-Fenton degradation of organics using highly efficient Cu-doped LaFeO3 under visible light

Phan

Nikoloski

Bahri

et al. 2018

Journal of Industrial and Engineering Chemistry

110

View full text Add to dashboard Cite

show abstract

Section: Accepted Manuscriptmentioning

confidence: 99%

Heterogeneous photo-Fenton degradation of organics using highly efficient Cu-doped LaFeO3 under visible light

Phan

Nikoloski

Bahri

et al. 2018

Journal of Industrial and Engineering Chemistry

110

View full text Add to dashboard Cite

show abstract

“…Photocatalysis, as a potential route to relieving environmental and energy issues, has been intensively applied for pollutant degradation [1][2][3][4], water splitting [5][6][7], and solar energy conversion [8][9][10][11]. As a typical metal sulfide, ZnS, which has a large band gap (3.6~3.8 eV), exhibits excellent photocatalytic capacity, owing to its strong oxidation and high negative potentials of excited electrons [12,13].…”

Section: Introductionmentioning

confidence: 99%

N-Doped Carbon-Coated ZnS with Sulfur-Vacancy Defect for Enhanced Photocatalytic Activity in the Visible Light Region

et al. 2019

View full text Add to dashboard Cite

In this work, N-doped carbon-coated ZnS with a sulfur-vacancy defect (ZnS@N-C) was performed for the visible-light-driven photodegradation of tetracycline hydrochloride (TCH). The obtained ZnS@N-C exhibited enhanced photocatalytic activity compared with ZnS for TCH removal. Among these ZnS@N-C composites, ZnS@N-C-3 with N-doped content of 3.01% (100 nm) presented the best visible-light photocatalytic activity and superior long-term photocatalytic stability after five cycle times for TCH removal in the visible light region. This may be ascribed to the interface between the N-doped carbon shell and ZnS with a sulfur-vacancy defect for efficient charge transfer and the restrained recombination of charge carriers. Electron spin resonance (ESR) results indicate that the ·O 2 radical plays a crucial role in the enhanced photocatalytic activity of ZnS@N-C-3. Nanomaterials 2019, 9, 1657 2 of 13 composites between carbon and semiconductors. To further enhance the electron transfer and extend the visible light harvesting region, carbon doped with N atoms can adjust the work function of carbon and induce charge delocalization [23-26]. Hsu et al. have reported that sandwich-like hydrogenated C-doped anatase TiO 2 nanocrystals/N-doped carbon dots@layer/rutile TiO 2 nanorod arrays have exhibited efficient photoelectron-chemical activity of water oxidation [27]. This may be attributed to the N-doped carbon dots being the photosensitizer of long wavelength light-harvesting and the N-doped carbon layer being the conductive layer of charge transport toward the current collector. Wang et al. have also confirmed that N-doped carbon dots/g-C 3 N 4 can enhance visible-light photo-degradation activity for indomethacin due to the efficient charge separation and band gap narrowing of N-doped carbon dots [28]. Core-shell structured ZnO@N-doped carbon can efficiently adsorb and photodegrade methylene blue in the visible light region [29]. Electrons generated from nitrogen are transferred from the N-doped carbon surface to adsorbed oxygen, forming reactive radicals in the photocatalytic system [30-34]. In addition, surface polarity of N-doped carbon can promote dispersion in aqueous solution. However, few works have focused on the enhanced photocatalytic activity of ZnS with sulfur-vacancy defects using N-doped carbon coating. This work focuses on the synthesis of ZnS with an N-doped carbon coating (ZnS@N-C) and its sulfur-vacancy effect on visible-light photocatalytic activity for the removal of tetracycline hydrochloride (TCH). Reported photocatalysts such as CuInS 2 /Mg(OH) 2 [35], ZnIn 2 S 4 /BiPO 4 [36], AgBr/Bi 2 WO 6 [37], BiOI/g-C 3 N 4 /CeO 2 [38], and TiO 2 / BiOCl [39] are efficient heterojunctions for the visible-light-driven degradation of TCH. Differently from these compositions, N-doped carbon serves as the electron capture, facilitating the separation of electron-hole pairs. In this strategy, N-doped carbon is generated from the decomposition of cyanamide and coated on the surface of ZnS nano-particles, which are further tr...

show abstract

“…A industrialização tem levado a uma grande demanda de águas residuais que, por conterem altas concentrações de diversos poluentes orgânicos, tais como carbono orgânico, metais pesados e corantes, além de altas demandas de oxigênio, causam preocupação para o meio ambiente (Yu et al, 2017;Wang et al, 2016). As indústrias têxteis são grandes responsáveis por essa preocupação, pela descarga de efluentes contendo corantes e outros produtos químicos, o que torna esse efluente um desafio ambiental (Touati et al, 2016).…”

Section: Introductionunclassified

“…Uma opção para a remoção de uma série de poluentes orgânicos em efluentes são os Processos Oxidativos avançados (POA's), com o uso de oxidantes potentes e fotocatalisadores , como é o caso do dióxido de titânio (TiO2), composto de baixo custo, com natureza inerte, fotoestável e com estrutura porosa (Touati et al, 2016). Em larga escala, é mais viável utilizar o catalisador imobilizado (ou suportado) ao invés de em suspensão, pois essa aplicação evita etapas posteriores para a recuperação do material fotocatalítico (Dalponte et al, 2016) Este trabalho teve como objetivo estudar a degradação de uma matriz real têxtil utilizando POA's, a fim de comparar os sistemas de fotólise, peróxido de hidrogênio (H2O2), TiO2 em suspensão e suportado em lacres de alumínio reciclados e seus usos combinados em exposição à radiação natural solar.…”

Section: Introductionunclassified

Fotodegradação Solar De Efluente Têxtil Utilizando Tio2 Imobilizado Em Alumínio Reciclado

Aquino¹,

Barbosa²,

Oliveira³

et al. 2018

Blucher Chemical Engineering Proceedings

View full text Add to dashboard Cite

RESUMO -Efluentes têxteis possuem grandes quantidades de contaminantes das águas e por isso causam preocupação ambiental. Os Processos Oxidativos avançados (POA's) são uma técnica eficiente na remoção desse tipo de matriz real. O objetivo deste trabalho foi comparar a degradação em sistemas fotocatalíticos em suspensão e suportados em alumínio reciclado com radiação solar, utilizando uma amostra real têxtil. O melhor sistema obtido foi o com o uso combinado de peróxido de hidrogênio e o catalisador TiO2 imobilizado em alumínio, com 100% de remoção de coloração e 88% de remoção de compostos aromáticos após 360 minutos de experimento. A imobilização de TiO2 em alumínio fornece um processo de baixo custo e com possibilidade de reutilização de fotocatalisador.

show abstract

Photocatalytic degradation of textile wastewater in presence of hydrogen peroxide: Effect of cerium doping titania

Cited by 73 publications

References 49 publications

Heterogeneous photo-Fenton degradation of organics using highly efficient Cu-doped LaFeO3 under visible light

Heterogeneous photo-Fenton degradation of organics using highly efficient Cu-doped LaFeO3 under visible light

N-Doped Carbon-Coated ZnS with Sulfur-Vacancy Defect for Enhanced Photocatalytic Activity in the Visible Light Region

Fotodegradação Solar De Efluente Têxtil Utilizando Tio2 Imobilizado Em Alumínio Reciclado

Contact Info

Product

Resources

About