Enhancing the photocatalytic performance of surface - Treated SnO2 hierarchical nanorods against methylene blue dye under solar irradiation and biological degradation

Perumal, Veeradasan; Inmozhi, C.; Uthrakumar, R.; Robert, R.; Chandrasekar, M.; Mohamed, S. Beer; Honey, Shehla; Raja, A.; Galil, Fahd Mohammed Abd Al; Kaviyarasu, K.

doi:10.1016/j.envres.2022.112821

Cited by 68 publications

(9 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The band gap of synthesized nanomaterials has been calculated using Tauc plot. Obtained results justified that coupled Cr 2 O 3 @ZnHCC nanocomposite showed lower band gap (1.3 eV) as compared to its parent nanoparticles, that is, ZnHCC (1.8 eV) and Cr 2 O 3 (3.3 eV) confirmed more visible light adsorption 53 (Figure 7). Defects in transmittance edges and synergic effects are responsible for this occurrence.…”

Section: Reflectance Spectra and Bandgap Analysissupporting

confidence: 59%

“…Effect of the irradiation source and scavenger analysisMaximum degradation of targeted drugs was observed under daylight than in the dark condition for 5 h exposure due to availability of sufficient energy for transfer of electrons from valence band to conduction band (Figure9a,b). In the absence of sunlight, high surface area and negative zeta potential (stability) of nanocomposite could only adsorb the drugs on the surface 53. But in the presence of light, the electron-hole pairs were generated due to electronic excitation andfollowed by the generation of hydroxyl radicals, holes and superoxides in the presence of H 2 O and O 2 .…”

mentioning

confidence: 99%

See 1 more Smart Citation

Efficient photocatalytic degradation of emerging pollutants by green synthesized Prussian blue analogue nanocomposite

Yadav

Rani

Shanker

2022

Env Prog and Sustain Energy

View full text Add to dashboard Cite

Worldwide consumption, toxicity, and bioaccumulation of paracetamol (PCM) and atenolol (ATL) has drawn attention of researchers over last decades. A small portion of these drugs is absorbed by human body and rest of them is excreted through urine and feces to the environment (water bodies and soil) which might result in negative impacts. Nanocomposite of chromium oxide coupled with zinc hexacyanocobaltates (Cr 2 O 3 @ZnHCC) was synthesized by a green-method using Sapindus mukorossi seed-extract for the removal of targeted drugs. Microscopic and spectroscopic analysis of Cr 2 O 3 @ZnHCC showed uniformly incorporated prisms into cubic structure having ~75 nm particle size. Well-characterized Cr 2 O 3 @ZnHCC and individuals (Cr 2 O 3 & ZnHCC) were utilized for the degradation of PCM and ATL under direct sunlight and dark conditions. Highest degradation of targeted drugs (91%-94%) resulted at 20 mg L À1 concentration of pollutant, 25 mg of catalyst dose, and pH ~7 under daylight exposure (5 h). First-order kinetics followed with a high adsorption capacity, X m (13.4-14.5 mg g À1 ) value was obtained to confirm the strong binding with the pollutants. Moreover, Cr 2 O 3 @ZnHCC substantially suppressed the half-life of targeted drugs (PCM: 0.6 h; ATL: 2.9 h) and converted them into safer-small metabolites as confirmed by liquid chromatography-mass-spectrometry analysis, and the reduction of carbon content was confirmed by total organic carbon analysis. The charge separation mechanism was assisted by UV reflectance and photoluminescence data. The synthesized green-nano photocatalyst displayed high reproducibility (up to 10th cycle), sensitivity, and stability during the degradation process which makes this a suitable candidate for industrial applications.

show abstract

Section: Reflectance Spectra and Bandgap Analysissupporting

confidence: 59%

mentioning

confidence: 99%

Efficient photocatalytic degradation of emerging pollutants by green synthesized Prussian blue analogue nanocomposite

Yadav

Rani

Shanker

2022

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…In the past few years, different morphologies of SnO 2 have been reported for photocatalytic degradation of organic compounds [10,18,19]. The three-dimensional (3D) structure of SnO 2 has attracted widespread attention due to its excellent photocatalytic activity [11,20].…”

Section: Introductionmentioning

confidence: 99%

Effect of annealing temperature on the formation of oxygen vacancies on the surface of flower-like SnSe/SnO₂ heterostructure and visible light catalytic performance

Liao,

Li,

Jin

et al. 2023

Phys. Scr.

View full text Add to dashboard Cite

The morphology, structure, and oxygen vacancies in principle determine the light absorption, charge transfer, and separation of photocatalysts, thereby determining their photocatalytic performance. In this study, flower-like SnSe obtained from hydrothermal reactions was oxidized to obtain heterojunctions with SnSe/SnO2. Flower-like SnSe/SnO2 heterojunctions with different concentrations of oxygen vacancies were prepared by annealing them in an argon atmosphere at different temperatures. The flower-like SnSe/SnO2 series with different oxygen vacancies were systematically characterized by TEM, XRD, XPS, PL, and EPR. The research results demonstrate the presence of oxygen vacancies in the flower-like SnSe/SnO2. As the annealing temperature increases, the surface oxygen vacancy concentration shows a trend of first increasing and then decreasing. When the annealing temperature reaches 600 °C, the oxygen vacancy concentration of flower-like SnSe/SnO2 is the highest. Meanwhile, research has shown that surface oxygen vacancies help expand the light absorption range, and the increased valence bandwidth leads to effective charge transfer and separation, thereby promoting visible light photoactivity. SnSe/SnO2-600 °C exhibited excellent visible light photocatalytic activity. The photodegradation of methylene blue (MB) at ≥ 400 nm can reach ∼70% within 120 min. This study verified the route for the introduction of oxygen vacancies via facile calcination and constructed SnSe/SnO2 with surface oxygen vacancies, providing a reference with deep insights for improving photocatalytic activity.

show abstract

“…[3][4][5][6][7][8] Tin oxide (SnO 2 ) is an ntype metal oxide well-studied photocatalyst for dye degradation owing to its superior optical, electrical, and electrochemical properties. [9][10][11][12][13] It is a viable photocatalyst for practical applications due to facile production, low cost, eco-friendly, good chemical and biological inertness, high photosensitivity, and thermodynamic stability. 14,15 Nevertheless, separating the photocatalyst from treated water and reuse is challenging, especially in the nano-form due to its high dispersive nature.…”

Section: Introductionmentioning

confidence: 99%

A facile route to synthesize n-SnO₂/p-CuFe₂O₄ to rapidly degrade toxic methylene blue dye under natural sunlight

Duan¹,

Que²,

Koppala

et al. 2022

RSC Adv.

View full text Add to dashboard Cite

show abstract

Enhancing the photocatalytic performance of surface - Treated SnO2 hierarchical nanorods against methylene blue dye under solar irradiation and biological degradation

Cited by 68 publications

References 69 publications

Efficient photocatalytic degradation of emerging pollutants by green synthesized Prussian blue analogue nanocomposite

Efficient photocatalytic degradation of emerging pollutants by green synthesized Prussian blue analogue nanocomposite

Effect of annealing temperature on the formation of oxygen vacancies on the surface of flower-like SnSe/SnO₂ heterostructure and visible light catalytic performance

A facile route to synthesize n-SnO₂/p-CuFe₂O₄ to rapidly degrade toxic methylene blue dye under natural sunlight

Contact Info

Product

Resources

About

Enhancing the photocatalytic performance of surface - Treated SnO2 hierarchical nanorods against methylene blue dye under solar irradiation and biological degradation

Cited by 68 publications

References 69 publications

Efficient photocatalytic degradation of emerging pollutants by green synthesized Prussian blue analogue nanocomposite

Efficient photocatalytic degradation of emerging pollutants by green synthesized Prussian blue analogue nanocomposite

Effect of annealing temperature on the formation of oxygen vacancies on the surface of flower-like SnSe/SnO2 heterostructure and visible light catalytic performance

A facile route to synthesize n-SnO2/p-CuFe2O4 to rapidly degrade toxic methylene blue dye under natural sunlight

Contact Info

Product

Resources

About

Effect of annealing temperature on the formation of oxygen vacancies on the surface of flower-like SnSe/SnO₂ heterostructure and visible light catalytic performance

A facile route to synthesize n-SnO₂/p-CuFe₂O₄ to rapidly degrade toxic methylene blue dye under natural sunlight