Development of SnO2–ZnO thin films as a photocatalyst for obtaining alternative fuels through photocatalytic reactions

Cruz, M.R. Alfaro; Saldaña-Ramírez, A.; Juárez-Ramírez, Isaías; Torres-Martı́nez, Leticia M.

doi:10.1016/j.solidstatesciences.2023.107112

Cited by 9 publications

(3 citation statements)

References 47 publications

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“…The energy band gap energy (E g ) of ZnO-SnO 2 (25%) NPs was found to be 3.18 eV. The obtained values of band gap (E g ) energies are comparable to their reported values [53,54].…”

Section: Optical Analysis-band Gap Determinationsupporting

confidence: 80%

Green Synthesis of Mixed ZnO-SnO2 Nanoparticles for Solar-Assisted Degradation of Synthetic Dyes

Algarni,

Al-Mohaimeed,

Abduh

et al. 2023

Catalysts

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In this work, ZnO, SnO2, and their mixed ZnO-SnO2(25%) nanoparticles (NPs) were successfully green synthesized in a straightforward manner with a low-cost and environmentally friendly approach using a banana peel extract. The synthesized nanophotocatalysts were characterized using various techniques including FTIR, XRD, UV-Vis, TEM, SEM, BET, PL, EDS, and TGA. The characterization results showed that the ZnO and SnO2 powders were crystallized in a hexagonal wurtzite and rutile-type tetragonal structures, respectively, and their mixed ZnO-SnO2(25%) NPs contain both structures. Also, it was found that the addition of SnO2 into the ZnO structure reduces the PL intensity of the latter, confirming better separation of electron/hole pairs. The average particle size of a ZnO-SnO2(25%) NP photocatalyst was found to be 7.23 nm. The cationic dyes methylene blue (MB) and crystal violet (CV) as well as the anionic dyes naphthol blue black (NBB) and Coomassie brilliant blue R 250 (CBB) were employed as model dyes to assess the dye removal efficiencies of the biosynthesized nanophotocatalysts under sunlight. In all cases, the mixed ZnO-SnO2(25%) NP photocatalyst showed much better photocatalytic activity than individual photocatalysts. The degradation percent of dyes using ZnO-SnO2(25%) NPs ranged between 92.2% and 98%. The efficient photocatalytic activity of ZnO-SnO2(25%) NPs is attributed to the effective charge separation and reduced electron/hole recombination rate. The kinetic study results conformed to a pseudo first-order reaction rationalized in terms of the Langmuir–Hinshelwood model. Furthermore, the results showed that the ZnO-SnO2(25%) NP photocatalyst is highly stable and could be recycled several times without a noticeable reduction in its catalytic activity towards dye removal.

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“…The energy band gap energy (E g ) of ZnO-SnO 2 (25%) NPs was found to be 3.18 eV. The obtained values of band gap (E g ) energies are comparable to their reported values [53,54].…”

Section: Optical Analysis-band Gap Determinationsupporting

confidence: 80%

Green Synthesis of Mixed ZnO-SnO2 Nanoparticles for Solar-Assisted Degradation of Synthetic Dyes

Algarni,

Al-Mohaimeed,

Abduh

et al. 2023

Catalysts

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show abstract

“…The properties of SnO 2 , such as high transparency, high refractive index, high chemical stability, and excellent electrical conductivity, make it an attractive material for use in a wide range of technology applications. These applications include gas sensors [8], solar cells [9], photocatalysts [10], electrochromic devices [11], and antistatic coatings [12]. The versatility and flexibility of SnO 2 coatings have made them a popular research topic, with numerous studies being conducted to explore their various applications [13].…”

Section: Introductionmentioning

confidence: 99%

“…Some initiators as tertiary amines, such as 2-(N, N-dialkylamino)ethanol and N, N, N , N -tetramethyl ethylenediamine, exhibit a higher initiation activity during PMMA polymerization [17]. In addition, H 2 O 2 [10] and potassium peroxy-disulfate [18] have been reported as initiators. However, the most common initiators used for PMMA synthesis are ammonium persulfate (APS) [19][20][21][22] or APS/ascorbic acid mixtures [23] that act as redox initiators.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of PMMA Microspheres with Tunable Diameters: Evaluation as a Template in the Synthesis of Tin Oxide Coatings

Mendoza-Castellanos,

Pantoja-Espinoza,

Rodríguez-Pacheco

et al. 2023

Polymers

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The synthesis of polymethyl methacrylate (PMMA) spheres with different sizes has been a challenge. PMMA has promise for future applications, e.g., as a template for preparing porous oxide coatings by thermal decomposition. Different amounts of SDS as a surfactant are used as an alternative to control PMMA microsphere size through the formation of micelles. The objectives of the study were twofold: firstly, to determine the mathematical relationship between SDS concentration and PMMA sphere diameter, and secondly, to assess the efficacy of PMMA spheres as templates for SnO2 coating synthesis and their impact on porosity. The study used FTIR, TGA, and SEM techniques to analyze the PMMA samples, and SEM and TEM techniques were used for SnO2 coatings. The results showed that PMMA sphere diameter could be adjusted by varying the SDS concentration, with sizes ranging from 120 to 360 nm. The mathematical relationship between PMMA sphere diameter and SDS concentration was determined with a y = axb type equation. The porosity of SnO2 coatings was found to be dependent on the PMMA sphere diameter used as a template. The research concludes that PMMA can be used as a template to produce oxide coatings, such as SnO2, with tunable porosities.

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Synthesis of SnO2-ZnO heterojunction composites for effective degradation of methylene blue and chromium (VI) under solar light irradiation

Venkatesh,

Gayathri,

Muralidharan

et al. 2024

Ionics

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Development of SnO2–ZnO thin films as a photocatalyst for obtaining alternative fuels through photocatalytic reactions

Cited by 9 publications

References 47 publications

Green Synthesis of Mixed ZnO-SnO2 Nanoparticles for Solar-Assisted Degradation of Synthetic Dyes

Green Synthesis of Mixed ZnO-SnO2 Nanoparticles for Solar-Assisted Degradation of Synthetic Dyes

Synthesis of PMMA Microspheres with Tunable Diameters: Evaluation as a Template in the Synthesis of Tin Oxide Coatings

Synthesis of SnO2-ZnO heterojunction composites for effective degradation of methylene blue and chromium (VI) under solar light irradiation

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