Synthesis and characterization of Ag2O/B2O3/TiO2 ternary nanocomposites for photocatalytic mineralization of local dyeing wastewater under artificial and natural sunlight irradiation

Tijani, Jimoh Oladejo; Momoh, Ufon Ojogbane; Salau, Rasaq Bolakale; Bankole, M. T.; Abdulkareem, A. S.; Roos, W.

doi:10.1007/s11356-019-05124-y

Cited by 23 publications

(9 citation statements)

References 26 publications

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“…The optical properties of the photocatalyst powders were examined by UV-Vis absorption spectroscopy. Figure 4 illustrates the comparative UV-Vis absorption spectra of B be related to the following increase in charge carrier concentration, which hindered the lower energy states [25]. According to the literature, the mentioned increase in the band gap energy of B 2 O 3 upon Fe doping could be corresponded to the quantization size effect, monitored as the B 2 O 3 particle size moves toward the Bohr radius value [26].…”

Section: Optical Propertymentioning

confidence: 97%

Effect of Iron Doping on Photocatalytic Activity of Boron Oxide Processed Using Polyvinyl Borate Precursor

Köysüren

2019

Journal of Boron

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In this study, boron oxide (B 2 O 3 ) powder has been synthesized by the pyrolysis of polyvinyl borate precursor in air. For this purpose, polyvinyl borate precursor was synthesized through the condensation reaction of polyvinyl alcohol and boric acid, and then the polymeric precursor was pyrolyzed at 500°C. The as-prepared B 2 O 3 particles were doped with iron (Fe) ions using the wet impregnation method. The photocatalytic activity of both undoped B 2 O 3 and iron doped B 2 O 3 (Fe-B 2 O 3 ) powders was studied by investigating the degradation of the model dye, methylene blue, under UV light irradiation. It was pointed out that iron doped B 2 O 3 powder exhibited enhanced photocatalytic activity compared to undoped one. In addition, various techniques of characterization such as FTIR, XRD, FESEM, EDX and UV-Vis spectroscopy were performed to confirm the synthesis of B 2 O 3 particles and the presence of iron ions in the crystal structure of the prepared photocatalyst. The novelty of this study was to research the photocatalytic performance of both B 2 O 3 and Fe-B 2 O 3 photocatalysts.

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Section: Optical Propertymentioning

confidence: 97%

Effect of Iron Doping on Photocatalytic Activity of Boron Oxide Processed Using Polyvinyl Borate Precursor

Köysüren

2019

Journal of Boron

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“…The synthesis of TiO 2 nanoparticles was carried out using the modified method described by Tijani et al (2019) and Zahir et al (2015). A known volume (50 cm 3 ) of Parkia biglobossa aqueous leaves extract was measured into a 250 mL beaker followed by slowed addition of 50 cm 3 of 0.1 M titanium (IV) isopropoxide under continuous stirring on a magnetic stirrer at 2000 rpm for 2 h. The pH of the mixture was adjusted to 8 using 1 M NaOH solution.…”

Section: Green Synthesis Of Titanium (Iv) Oxide Nanoparticlesmentioning

confidence: 99%

“…TiO 2 nanoparticles are widely investigated by researchers due to their photochemical, thermal and biological stability, low cost, low toxicity, great refractive index, excellent antimicrobial and adsorptive properties amongst others (Durango-Giraldo et al 2019;Landage et al 2020). Titanium (IV) oxide exists as anatase, brookite or in the rutile phase with the anatase phase unstable and most suitable for photocatalytic applications (Musial et al 2020;Tijani et al 2019). Studies have shown that most biological synthesised TiO 2 are anatase phase or mixed TiO 2 phases and are commonly used for photocatalytic applications (Krishnan and Mahalingam 2017;Mustapha et al 2020) while TiO 2 in the rutile phase is employed as an adsorbent because of thermal stability and presence of more anchoring sites to sequester adsorbate in the aqueous medium.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive behaviour of rutile phased titania nanoparticles supported on acid-modified kaolinite clay for the removal of selected heavy metal ions from mining wastewater

et al. 2022

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This study investigated the removal of metal ions pollutants in mining wastewater such as Mn (II), Fe (III), Pb (II) and Cu (II) ions by acid-activated kaolinite clay (AAC) and titanium (IV) oxide (TiO2) nanoparticles supported on the AAC (TiO2–AAC). TiO2 nanoparticles were synthesised using titanium salt precursor with leaves extract of Parkia biglobossa and impregnated on the AAC to develop TiO2-AAC as a nanoadsorbent. The AAC and TiO2–AAC nanocomposites were characterized using different analytical techniques. Actual concentrations of selected heavy metals in mining wastewater was determined prior and after treatment using the prepared adsorbents in batch adsorptive studies with atomic absorption spectrophometer. The characterisation studies confirmed that a rutile phase TiO2 was doped the on acid-activated kaolinite clay. Morphology analysis shows that the developed adsorbents were homogeneously dispersed and porous. The results of the surface area further revealed that the AAC, TiO2 and TiO2–AAC has 14.15, 10.23 and 32.98 m2/g, respectively. The percentage removal of heavy metals followed the order of TiO2–AAC > AAC due to the higher surface area and enhanced surface functionality of the former than the latter. The adsorption capacity increased from 86.13 to 91.99% (Fe (III)), 83.12 to 89.37% (Mn (II)), 68.48 to 81.95% (Cu (II)) and 29.49 to 32.39% (Pb (II)) from AAC to TiO2–AAC. The kinetic and isotherm models were best fitted by pseudo-second-order kinetics and Langmuir model. Whilst the thermodynamic investigation found that, the adsorption process was endothermic, spontaneous and chemisorption controlled. Conclusively, the TiO2–AAC nanocomposite exhibited better performance than AAC alone.

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“…Many reports have demonstrated the feasibility of this material to decrease NO X concentration since its photocatalytic oxidation property was first discovered by Fujishima and Honda in 1972 [8]. In the 1980s, organic pollution in wastewater was degraded by adding TiO 2 and under high-intensity UV light [9,10].…”

Section: Introductionmentioning

confidence: 99%

Study on Air-Purifying Performance of Semi-Flexible Asphalt Samples Coated with Titanium Dioxide Using Different Methods

Yan¹,

Wang²,

Chi³

et al. 2022

Journal of Renewable Materials

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Titanium dioxide (TiO 2 ) was recently employed to apply onto road surfaces to degrade the harmful compounds from vehicle emissions. However, it remains a challenging task to find a highly compatible pavement type for TiO 2 application to achieve durable and efficient air-purifying performance. This study proposed to coat TiO 2 particles onto semi-flexible pavement surface and tried to investigate an optimum coating method. Three coating methods, including direct mixing TiO 2 (MT) with asphalt mixture, spraying dry TiO 2 (ST) coating and watersolution-based TiO 2 (WT) coating on semi-flexible pavement surface. To achieve this objective, semi-flexible samples were prepared to evaluate and compare the performances of three coating methods by employing resistance to wearing, NO removal efficiency tests and residual texture depth tests. It was found that the ST method not only provided better NO degrading efficiency but also improved the resistance to wearing than the other two methods.

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Synthesis and characterization of Ag2O/B2O3/TiO2 ternary nanocomposites for photocatalytic mineralization of local dyeing wastewater under artificial and natural sunlight irradiation

Cited by 23 publications

References 26 publications

Effect of Iron Doping on Photocatalytic Activity of Boron Oxide Processed Using Polyvinyl Borate Precursor

Effect of Iron Doping on Photocatalytic Activity of Boron Oxide Processed Using Polyvinyl Borate Precursor

Adsorptive behaviour of rutile phased titania nanoparticles supported on acid-modified kaolinite clay for the removal of selected heavy metal ions from mining wastewater

Study on Air-Purifying Performance of Semi-Flexible Asphalt Samples Coated with Titanium Dioxide Using Different Methods

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