Photocatalytic properties of TiO2-SiO2 sandwich multilayer films prepared by sol-gel dip-coating

Away, Romy Dwipa Y.; Takai-Yamashita, Chika; Ban, Takayuki; Ohya, Yutaka

doi:10.1016/j.tsf.2021.138522

Cited by 9 publications

(5 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The significant properties that must be noticed in the preparation of thin film are homogeneity and lack of any pores according to standard cleaning operation, for example, some pretreatments like etching in HCl, cleaning with deionized water and ethanol, and assisted ultrasonication during all the processes. The procedure finishes with the plate drying at 100 °C in the oven for a restricted time, which results in excellent adherence of dissolved particles on the plate surface. , Thongsuriwong et al reported the synthesis of ZnO thin films prepared by the sol–gel dip coating method. The initial concentration of zinc ions affected the prepared photocatalyst activity, optical properties, and morphology of ZnO thin films.…”

Section: Photocatalystsmentioning

confidence: 99%

“…The procedure finishes with the plate drying at 100 °C in the oven for a restricted time, which results in excellent adherence of dissolved particles on the plate surface. 117 , 118 Thongsuriwong et al 119 reported the synthesis of ZnO thin films prepared by the sol–gel dip coating method. The initial concentration of zinc ions affected the prepared photocatalyst activity, optical properties, and morphology of ZnO thin films.…”

Section: Photocatalystsmentioning

confidence: 99%

See 1 more Smart Citation

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO₂-Based Photocatalysts for Photodegradation of Contaminants

Ghamarpoor,

Fallah,

Jamshidi

2024

ACS Omega

View full text Add to dashboard Cite

The environment being surrounded by accumulated durable waste organic compounds has become a critical crisis for human societies. Generally, organic effluents of industrial plants released into the water source and air are removed by some physical and chemical processes. Utilizing photocatalysts as cost-effective, accessible, thermally/ mechanically stable, nontoxic, reusable, and powerful UV-absorber compounds creates a new gateway toward the removal of dissolved, suspended, and gaseous pollutants even in trace amounts. TiO 2 and ZnO are two prevalent photocatalysts in the field of removing contaminants from wastewater and air. Structural modification of the photocatalysts with metals, nonmetals, metal ions, and other semiconductors reduces the band gap energy and agglomeration and increases the affinity toward organic compounds in the composite structures to expand their usability on an industrial scale. This increases the extent of light absorbance and improves the photocatalytic efficiency. Selecting a suitable synthesis method is necessary to prepare a target photocatalyst with distinct properties such as high specific surface area, numerous surface functional groups, and an appropriate crystalline phase. In this Review, significant parameters for the synthesis and modification of TiO 2 -and ZnO-based photocatalysts are discussed in detail. Several proposed mechanistic routes according to photocatalytic composite structures are provided. Some electrochemical analyses using charge carrier trapping agents and delayed recombination help to plot mechanistic routes according to the direction of photoexcited species (electron−hole pairs) and design more effective photocatalytic processes in terms of cost-effective photocatalysts, saving time and increasing productivity.

show abstract

Section: Photocatalystsmentioning

confidence: 99%

Section: Photocatalystsmentioning

confidence: 99%

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO₂-Based Photocatalysts for Photodegradation of Contaminants

Ghamarpoor,

Fallah,

Jamshidi

2024

ACS Omega

View full text Add to dashboard Cite

show abstract

“…There are several methods for removing pollutants from water, including ion exchange (Abbasi et al, 2013), (Vardhan et al, 2019), (Lalmi et al, 2018) membrane separation (Roy Choudhury et al, 2018), (Abdi et al, 2018), (Jana et al, 2018), chemical precipitation (Xanthopoulos et al, 2017), coagulation (Tang et al, 2016), and photocatalytic degradation (Away et al, 2020). However, these methods have several disadvantages, requiring high costs and producing a large amount of sludge residue.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Nephelium lappaceum (Rambutan) waste as biosorbent for heavy metals and dyes: a review

Rahmadani,

Putra,

Sari

et al. 2023

J. Nat. Scien. & Math. Res.

View full text Add to dashboard Cite

Pollution of environmental streams and ecosystems is rising. One of the sources of water contamination is the wastewater from the textile, plastics, and mining sectors, which contains both organic and inorganic pollutants. Heavy metals and dyes in wastewater must be treated before disposal to protect the aquatic environment and human health. Due to its effectiveness, low cost, and simplicity of use, biosorption has emerged as a wastewater treatment option. Rambutan waste, in particular, is promising for commercial usage due to its extensive availability and efficiency. In this article, we review the usage of natural rambutan peels, seeds, leaves, and stems for the biosorption of water contaminants. We discuss the factors that influence pollutant removal. A pH of 6 to 12 is advantageous for cationic pollutant removal, whereas a pH of less than 5 is appropriate for anionic pollutant removal. More significant concentrations of pollutants generally result in lesser removal, whereas higher doses of biosorbent result in higher removal. The ideal adsorption contact time for rambutan peels and seeds was less than an hour. We also discuss the isotherms of the adsorption process.

show abstract

“…Currently, nonmetal doped TiO 2 is attracting much interest due to advantages, such as low cost, low toxicity, resistance to photocorrosion and long-term stability [6][7][8]. There are many advanced preparation technologies for TiO 2 nanostructure, including sol-gel [9], hydrothermal method [10], coprecipitation [11] and solvothermal method [12]. Based on the above reasons, efficiently utilising natural light for photocatalytic degradation is inevitable.…”

Section: Introductionmentioning

confidence: 99%

C/S-TiO2 nanospheres with enhanced visible-light response for formaldehyde degradation of particleboard

Lei

Chen

Zhong³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

C/S-TiO2 nanospheres (CSTN) were prepared using a template-free solvothermal method. The size, shape and composition of the as-synthesised CSTN were investigated by transmission electron microscopy, X-ray diffractometry, energy-dispersive X-ray spectroscopy and electron probe microanalysis/wavelength dispersive spectroscopy. Elemental analysis revealed that C and S atoms were favourably doped into the TiO2. The photocatalytic oxidations were investigated in a simulated environment, and the catalytic activity was assessed by degrading formaldehyde emitted from particleboard under visible-light irradiation. A maximum degradation efficiency of 92.8% within 80 min indicated an excellent photocatalytic performance of the CSTN.

show abstract

Photocatalytic properties of TiO2-SiO2 sandwich multilayer films prepared by sol-gel dip-coating

Cited by 9 publications

References 30 publications

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO₂-Based Photocatalysts for Photodegradation of Contaminants

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO₂-Based Photocatalysts for Photodegradation of Contaminants

Utilization of Nephelium lappaceum (Rambutan) waste as biosorbent for heavy metals and dyes: a review

C/S-TiO2 nanospheres with enhanced visible-light response for formaldehyde degradation of particleboard

Contact Info

Product

Resources

About

Photocatalytic properties of TiO2-SiO2 sandwich multilayer films prepared by sol-gel dip-coating

Cited by 9 publications

References 30 publications

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO2-Based Photocatalysts for Photodegradation of Contaminants

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO2-Based Photocatalysts for Photodegradation of Contaminants

Utilization of Nephelium lappaceum (Rambutan) waste as biosorbent for heavy metals and dyes: a review

C/S-TiO2 nanospheres with enhanced visible-light response for formaldehyde degradation of particleboard

Contact Info

Product

Resources

About

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO₂-Based Photocatalysts for Photodegradation of Contaminants

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO₂-Based Photocatalysts for Photodegradation of Contaminants