On the influence of hydrothermal treatment pH on the performance of Bi2WO6 as photocatalyst in the glycerol photoreforming

Marinho, Juliane Z.; Nascimento, Lucas L.; Santos, Allyson Leandro Rodrigues dos; Faria, Anízio M.; Machado, Antonio E. H.; Patrocínio, Antonio Otávio T.

doi:10.1007/s43630-022-00249-5

Cited by 11 publications

(5 citation statements)

References 68 publications

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“…Furthermore, it is observed that CTAB prompts a reduction in the thickness and disordered Bi 2 WO 6 morphological www.nature.com/scientificreports/ nanostructure. Therefore, it was suggested that the addition of CTAB is responsible for structural alternation that led to forming WO 6 octahedron 49,61 . Moreover, the Raman spectra obtained agree with the XRD results 62,63 .…”

Section: Materials θ (°) Hkl Fwhm (°) Grain Size (Nm)mentioning

confidence: 99%

“…The layered structure of the Bi 2 WO 6 nanoparticles would be primarily responsible for the extreme www.nature.com/scientificreports/ variation 77 . Furthermore, under hydrothermal conditions to yield Bi 2 WO 6 nanoflakes structures, nucleation processes driven by minimization of the total energy of the system lead to relatively high surface areas with larger sizes 61,77 . Additionally, the FESEM characterization of Bi 2 WO 6 /MWCNTs nanocomposite reveals a structure similar to the pure flower-like microstructures Bi 2 WO 6 as shown in Fig.…”

Section: Materials θ (°) Hkl Fwhm (°) Grain Size (Nm)mentioning

confidence: 99%

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Fabrication of pure Bi2WO6 and Bi2WO6/MWCNTs nanocomposite as potential antibacterial and anticancer agents

Rhoomi,

Ahmed,

Jabir

et al. 2024

Sci Rep

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An essential research area for scientists is the development of high-performing, inexpensive, non-toxic antibacterial materials that prevent the transfer of bacteria. In this study, pure Bi2WO6 and Bi2WO6/MWCNTs nanocomposite were prepared by hydrothermal method. A series of characterization results by using XRD FTIR, Raman, FESEM, TEM, and EDS analyses, reveal the formation of orthorhombic nanoflakes Bi2WO6 by the addition of NaOH and pH adjustment to 7. Compared to pure Bi2WO6, the Bi2WO6/MWCNTs nanocomposite exhibited that CNTs are efficiently embedded into the structure of Bi2WO6 which results in charge transfer between metal ion electrons and the conduction or valence band of Bi2WO6 and MWCNTs and result in shifting to longer wavelength as shown in UV–visible and PL. The results confirmed that MWCNTs are stuck to the surface of the microflowers, and some of them embedded inside the Bi2WO6 nanoflakes without affecting the structure of Bi2WO6 nanoflakes as demonstrated by TEM. In addition, Pure Bi2WO6 and the Bi2WO6/MWCNTs nanocomposite were tested against P. mirabilis and S. mutans., confirming the effect of addition MWCNTs materials had better antibacterial activity in opposition to both bacterial strains than pure Bi2WO6. Besides, pure Bi2WO6 and the Bi2WO6/MWCNTs nanocomposite tested for cytotoxicity against lung MTT test on Hep-G2 liver cancer cells, and flow-cytometry. Results indicated that pure Bi2WO6 and the Bi2WO6/MWCNTs nanocomposite have significant anti-cancer efficacy against Hep-G2 cells in vitro. In addition, the findings demonstrated that Bi2WO6 and Bi2WO6/MWCNTs triggered cell death via increasing ROS. Based on these findings, it appears that pure Bi2WO6 and the Bi2WO6/MWCNTs nanocomposite have the potential to be developed as nanotherapeutics for the treatment of bacterial infections, and liver cancer.

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Section: Materials θ (°) Hkl Fwhm (°) Grain Size (Nm)mentioning

confidence: 99%

Section: Materials θ (°) Hkl Fwhm (°) Grain Size (Nm)mentioning

confidence: 99%

Fabrication of pure Bi2WO6 and Bi2WO6/MWCNTs nanocomposite as potential antibacterial and anticancer agents

Rhoomi,

Ahmed,

Jabir

et al. 2024

Sci Rep

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“…The adsorption and desorption isotherms were used to investigate the surface area, pore volume, and pore size of the TiO 2 /Arabic gum, as shown in Figure 4a,b. According to the IUPAC classification, isotherms have a type IV classification, indicating materials with a mesoporous structure [76]. The surface area was 50.5 m 2 g −1 , pore size was 5.18 ηm, and the pore volume value was 0.091 cm 3 g −1 .…”

Section: Characterizationmentioning

confidence: 99%

TiO2/Arabic Gum for Degradation of Pollutants in Water

Lopes,

Araújo,

Damasceno

et al. 2023

Sustainability

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Emerging contaminants and pollution are environmental problems threatening public health. Antibiotic ciprofloxacin and methylene blue dye are pollutants frequently detected in water systems worldwide. Photocatalysis is a process for water treatment. TiO2-based catalysts synthesized with natural gums show improved photocatalytic properties. Here, the sol–gel method synthesized TiO2/Arabic gum for photocatalytic performance. The innovation of this work was synthesized at 400 °C and investigated their photocatalytic proprieties using methylene blue and ciprofloxacin as model pollutants. XRD showed that the photocatalyst was in the anatase phase. The result showed that TiO2 with a band gap of 3.29 eV was achieved at a calcination temperature of 400 °C. Corresponding FTIR results suggest only the existence of functional groups related to TiO2. The SEM and BET method characterization indicated that TiO2/Arabic gum were spherical-shaped nanoparticles arranged in clusters with a mesoporous structure, contributing to photocatalytic performance. In addition, photocatalytic studies showed that the methylene blue dye and ciprofloxacin antibiotic degradation rates reached 99% and 94% under UV light, respectively. The hole (h+) and OH ⦁ radicals are essential in photodegradation. The synthesized material showed excellent photostability and maintained almost the same degradation percentage in the three consecutive cycles tested on the different pollutants. The TiO2/Arabic gum is an excellent candidate for future use in treating contaminants in aqueous media using photocatalysis. Therefore, TiO2/Arabic gum nanoparticles are a promising material for wastewater treatment.

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“…Sob concentração de hidróxido de 6 M a morfologia, então, tornou-cúbica. Quando o nível de alcalinidade foi aumentado para 8 e finalmente para 10 M, foram observados agregados de partículas cúbicas pouco homogêneos Marinho et al (2022). investigaram a influência do pH do tratamento hidrotérmico na eficiência fotocatalítica de amostras de Bi 2 WO 6 para a fotorreforma do glicerol.…”

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Síntese Hidrotérmica De Óxidos Semicondutores Nanoestruturados: Um Mini-Review

Nunes,

Nascimento,

Carvalho Souza

et al. 2023

Open Science Research XII

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Nos últimos anos, houve um aumento significativo no interesse e na pesquisa sobre óxidos semicondutores. Esses materiais são amplamente utilizados em várias aplicações de alta tecnologia, o que envolve conversão de energia e catálise heterogênea. As propriedades dos óxidos semicondutores dependem da sua composição química, cristalinidade e tamanho de partícula. Portanto, existe uma demanda por métodos de sínteses que permitam a modulação de tais propriedades, a fim de se obter materiais para aplicações específicas. Nesse contexto, a síntese hidrotérmica apresenta muitas vantagens, por se tratar de um método amplamente empregado na obtenção dos mais diversos materiais, permitindo a fácil variação das condições de síntese. Nesse processo, uma solução ou suspensão aquosa do material precursor é aquecida em um reator fechado a temperaturas acima do ponto de ebulição da água, criando pressões superiores a 1 atmosfera. A capacidade de controlar a estrutura, o tamanho de partícula, a morfologia, a composição química e as propriedades optoeletrônicas dos materiais resultantes, pelas simples modificações das condições físico-químicas do meio reacional, tornam essa técnica atrativa para a obtenção dos mais diversos óxidos semicondutores.

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On the influence of hydrothermal treatment pH on the performance of Bi2WO6 as photocatalyst in the glycerol photoreforming

Cited by 11 publications

References 68 publications

Fabrication of pure Bi2WO6 and Bi2WO6/MWCNTs nanocomposite as potential antibacterial and anticancer agents

Fabrication of pure Bi2WO6 and Bi2WO6/MWCNTs nanocomposite as potential antibacterial and anticancer agents

TiO2/Arabic Gum for Degradation of Pollutants in Water

Síntese Hidrotérmica De Óxidos Semicondutores Nanoestruturados: Um Mini-Review

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