Photocatalytic degradation of methylene blue under visible light by dye sensitized titania

Samuel, J.; Yam, F.K.

doi:10.1088/2053-1591/ab6409

Cited by 31 publications

(7 citation statements)

References 46 publications

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“…High cost is needed to maintain a constant temperature, especially for the system, which relies on visible light photocatalytic degradation. The exposure to sunlight or high-intensity light source might fluctuate the temperature [13]. In 2014, Chen et al reported that the ZnO nanosphere exhibited excellent good thermal stability in the whole thermal process from 50 • C to 800 • C.…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Photocatalysts for Degradation of Dyes

et al. 2020

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In the current era of globalization, synthetic dyes are one of the key factors of water pollution. Photocatalysis constitutes a promising technology for the treatment of wastewater, especially to those containing hard-to-remove organic compounds. Zinc oxide nanoparticles (ZnONPs) play a vital role as a photocatalyst material. This research highlights the synthesized ZnONPs with roselle flower and oil palm leaf extract. The extracts and sodium hydroxide (NaOH) act as reducing agents during the synthesis process. Synthesis without the addition of plant extract is used as blank control for the experiment. Structural and optical studies of the three variants of ZnONPs were performed. High purity of ZnONPs with element Zn and O was obtained. The size of the three variants of ZnONPs was from 10–15 nm and found in agglomerated spherical shape. Large band gap, 3.2 eV was obtained by UV-Vis and high thermal stability was proven by TGA. Oxygen vacancies that assist in the degradation phenomenon were found in ZnONPs. Five percent of ZnONPs with the presence of 10 W UV light could effectively degrade 10 ppm MO in 5 h and MB in 3 h. Besides, high antioxidant properties and low toxicity demonstrated the ability of ZnONPs to be used as photocatalysts. In conclusion, ZnONPs can be further developed for pharmaceutical and industrial use.

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Section: Introductionmentioning

confidence: 99%

Eco-Friendly Photocatalysts for Degradation of Dyes

et al. 2020

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“…Therefore, this result stipulates another example of the utility of Zn2SiO4 mixed with silica crystalline used as catalyst for MB degradation. On the other hand, the control sample (MB treated without catalyst under sunlight irradiation) show lowest degradation efficiency as noted in various studies [28][29][30][31]. Hence the results highlight further alternatives in the preparation of ZnO-SiO2 composite and Zn2SiO4, especially using local sustainable resources and the corresponding products used as degradation photocatalyst in water pollutant.…”

Section: Resultsmentioning

confidence: 60%

ZnO-SiO2 and Zn2SiO4 Synthesis Utilizing Oil Palm Leaves for Degradation of Methylene Blue Dye in Aqueous Solution

Robkhob

Imboon

et al. 2020

J. Idn. Chem. Soc.

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A new approach was developed for the green synthesis of ZnO-SiO2 composite and Zn2SiO4 using zinc nitrate and sustainable silica precursor, oil palm (Elaeis guineensis) leaves (OPL). The products were synthesized at two different reaction temperatures through calcination in an open-air furnace at 500 and 1000 °C, respectively, and further identified with an X-ray diffractometry (XRD) analysis. The composite indicated by the presence of peaks at 2θ = 31.7°, 34.4°, 36.3°, 47.6°, 56.6°, and 62.9°, corresponds to ZnO and also revealed amorphous SiO2 at 2θ = 21°. Conversely, Zn2SiO4 was acknowledged at 2θ 25.6°, 31.50°, 34.0°, 39.5°, 48.9°, 56.5° and 65.6°, with crystalline silica at 2θ = 21.9°. The results showed the morphology of both products exhibited similar agglomeration based on scanning electron microscopy (SEM) analysis. Both products (ZnO-SiO2 composite and Zn2SiO4) possessed the capacity to degrade methylene blue (MB) under sunlight irradiation with efficiency of 85.9% and 69.3%, respectively.

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“…Table 2 shows the performance of our designed photocatalyst relative to the previously reported TiO 2 -based photocatalysts [35][36][37][38][39][40][41][42][43][44][45][46]. Our design showed higher photocatalytic degradation% within a short time relative to the reported data in references [36,41,43,44,46]. Additionally, using a lower catalyst dose than that reported in references [35,[37][38][39][40]42,45], showed high catalytic efficiency.…”

Section: Photocatalytic Activity Test Of Cs-tiomentioning

confidence: 69%

“…This figure provided error bars of triplicate measurements. Table 2 shows the performance of our designed photocatalyst relative to the previously reported TiO 2 -based photocatalysts [35][36][37][38][39][40][41][42][43][44][45][46]. Our design showed higher photocatalytic degradation% within a short time relative to the reported data in references [36,41,43,44,46].…”

Section: Photocatalytic Activity Test Of Cs-tiomentioning

confidence: 77%

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Green Synthesis of CS-TiO2 NPs for Efficient Photocatalytic Degradation of Methylene Blue Dye

et al. 2022

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The development of a non-malignant and sustainable treatment approach for eradicating mephitic organic dyes from freshwater resources is a daunting task. In a similar vein, the current work investigates the mitigation of methylene blue (MB) dye utilizing titanium dioxide nanoparticles (CS-TiO2 NPs) synthesized using cannabis sativa (bhang) leaf extract via a greener approach. The CS-TiO2 NPs are well characterized through XRD, FE-SEM, HR-TEM, UV-Vis spectroscopy, FTIR spectroscopy, and EDS spectroscopy. Microscopic studies confirm that the average particle size distribution of the individual particles was found to be in the range of 12.5 ± 1.5 nm, whereas the average size of the CS-TiO2 NPs aggregates is 24.5 ± 11.5 nm. Additionally, the synthesized CS-TiO2 NPs manifested remarkable photocatalytic degradation potential against methylene blue dye with a degradation efficiency of 98.2% and an apparent rate constant of 0.0398 min−1. As a result, this research offers a green/sustainable alternative for water purification.

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Photocatalytic degradation of methylene blue under visible light by dye sensitized titania

Cited by 31 publications

References 46 publications

Eco-Friendly Photocatalysts for Degradation of Dyes

Eco-Friendly Photocatalysts for Degradation of Dyes

ZnO-SiO2 and Zn2SiO4 Synthesis Utilizing Oil Palm Leaves for Degradation of Methylene Blue Dye in Aqueous Solution

Green Synthesis of CS-TiO2 NPs for Efficient Photocatalytic Degradation of Methylene Blue Dye

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