Microstructure and photocatalytic activity of SnO2:Bi3+ nanoparticles

Lê, Thị Thu Hiền; Vu, Tien-Hieu; Ngo, Duc Quan; Cao, Xuan Thang; Duong, Thanh–Tung; Nguyen, D.H.; Tran, Ngoc Khiem; Pham, Van Tuan

doi:10.1016/j.optmat.2023.113552

Cited by 10 publications

(11 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under UV irradiation, the hole concentration may increase further and some of the photogenerated electrons may be trapped by defects due to Ni 2+ and Vo preventing recombination with holes. The holes may be taking part in the degradation process of RhB molecule as proposed by Le et al [12]. As shown schematically in figure 9(b), electrons are excited from valence band (VB) to conduction band (CB), when the nanoparticle is irradiated with UV light.…”

Section: Photocatalytic Activitymentioning

confidence: 95%

“…It may be noticed that the SPR band at 550 nm takes 100 min to disappear in presence of Ni doped SnO 2 NPs whereas the band can be still observed after the same time in case of undoped SnO nanoparticle which means that it can be potential photocatalytic material for industrial waste water treatment. The slight decrease in activity observed after each cycle may be due to incomplete collection of the photocatalytic material [12].…”

Section: Photocatalytic Activitymentioning

confidence: 99%

“…Doping metal cations in SnO 2 was established to be a successful strategy to enhance the response towards visible light region and obstruct charge carrier recombination. A wide range of metal ions like Mn [6], Co [7], Ni [8], Cu [9], Zn [10], Sb [11], Bi [12] and Ce [13], etc are investigated as dopants in SnO 2 for their suitability towards degradation of hazardous dye molecules present in waste water released from food, paper, textile and leather tanning industries, etc This waste water treatment process has advantages over other processes like biodegradation, physical adsorption and reverse osmosis. These methods involve incomplete degradation of dye molecules and may lead to producing secondary pollutants in waste water.…”

Section: Introductionmentioning

confidence: 99%

“…Le et al[12] have proposed a mechanism in which both photogenerated electrons (e CB ) and holes ( + h ) get involved in a series of reactions with adsorbed oxygen and water molecules to form -…”

mentioning

confidence: 99%

See 3 more Smart Citations

Analyzing the role of Ni dopant to change the structural, optical and photocatalytic properties of SnO₂ nanoparticles

Pradhan,

Rout,

Parida

et al. 2023

Adv. Nat. Sci: Nanosci. Nanotechnol.

View full text Add to dashboard Cite

SnO2 and 5 wt% Ni doped SnO2 nanoparticles (SnO2:Ni NPs) were successfully synthesised by a template-free hydrothermal method. X-ray diffraction (XRD) patterns depicted polycrystalline nature of the NPs in rutile-type cassiterite phase with dominant (110) and (101) Bragg diffraction peaks. Rietveld refinement of XRD patterns supported single phase tetragonal crystal structure having space group P42/m n m. With Ni doping, crystallite size of NPs decreased from 39 nm to 35 nm whereas lattice strain increased from 3.56 × 10−3 to 3.99 × 10−3. This is attributed to the substitution of Sn4+ ion by Ni2+ ions. The morphology of the SnO2 NPs also changed from regular spherical shape to elongated irregular shape upon Ni doping. The dominant Raman peak obtained at 634 cm−1 matched with the signature peak for rutile SnO2 (Raman A1g mode). Further, we observed disappearance of E g mode due to Ni doping, which indicated the formation of oxygen vacancies. Also, XPS analysis indicated an increase of oxygen vacancy concentration in the doped NPs due to charge imbalance between Sn4+ and Ni2+. The direct optical band gap of SnO2 increased from 3.97 eV to 4.11 eV when doped with 5 wt% Ni and it is ascribed to Burstein–Moss effect. Irrespective of higher optical band gap of SnO2:Ni NPs, they showed enhanced photocatalytic activity to degrade Rhodamine B (RhB) dye molecules under UV-visible irradiation. The first order kinetic reaction rate constants for degradation of RhB were found to be 0.014 min−1 and 0.045 min−1 in case of SnO2 and SnO2:Ni NPs respectively. The enhanced photocatalytic activity in SnO2:Ni NPs is explained by relating to the formation of more oxygen vacancies and chemisorptions of O2 and H2O molecules followed by generation of radicals. This work demonstrates the superiority of SnO2:Ni NPs for use as photocatalytic material for industrial waste water treatment.

show abstract

Section: Photocatalytic Activitymentioning

confidence: 95%

Section: Photocatalytic Activitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Analyzing the role of Ni dopant to change the structural, optical and photocatalytic properties of SnO₂ nanoparticles

Pradhan,

Rout,

Parida

et al. 2023

Adv. Nat. Sci: Nanosci. Nanotechnol.

View full text Add to dashboard Cite

show abstract

“…In order to verify the effect of GO on the photoelectric properties of TiO 2 nanoparticles, the photoelectrochemical experiments are executed [45]. Figure 4(a) displays the photocurrent transient response of TiO 2 /GO nanocomposites with different GO mass ratios.…”

Section: Photodegradation Of Rhb Via Tio 2 /Go Nanocompositesmentioning

confidence: 99%

Glycol 400 assisted preparation of high contact surface TiO₂/GO nanocomposites for photocatalytic degradation rhodamine B

Lu,

Wei,

Shi

et al. 2023

Nanotechnology

View full text Add to dashboard Cite

TiO2/graphene oxide (GO) nanocomposites with high contact interface were prepared with glycol 400 (PEG400) served as dispersant. This nanocomposite exhibits improved photocatalytic efficiency in contrast with the nanocomposite prepared without PEG400. In this work, the photocatalytic performance was investigated by observing the degradation rate of Rhodamine B (RhB). And it is found that the mass ratios of GO in nanocomposites plays an important role. When the mass ratio of GO reached 45%, the photocatalytic performance of the nanocomposites reached the highest, which is ~72%. Moreover, the photocatalytic mechanism was studied through theoretical calculations, which can be summarized as follows: 1. The presence of GO decreases the band gap of TiO2 nanoparticles. 2. GO inhibits the the recombination of photogenerated electron-hole pair. 3. GO improves the adsorption capacity of TiO2 nanoparticles for RhB. This work promoted the application of TiO2/GO nanocomposites in wastewater treatment.

show abstract

Structural, optical, and dielectric properties of M/SnO2 (M= Al2O3, NiO, Mn3O4) nanocomposites

Sedky,

Afify,

Almohammedi

et al. 2024

Ceramics International

View full text Add to dashboard Cite

Microstructure and photocatalytic activity of SnO2:Bi3+ nanoparticles

Cited by 10 publications

References 45 publications

Analyzing the role of Ni dopant to change the structural, optical and photocatalytic properties of SnO₂ nanoparticles

Analyzing the role of Ni dopant to change the structural, optical and photocatalytic properties of SnO₂ nanoparticles

Glycol 400 assisted preparation of high contact surface TiO₂/GO nanocomposites for photocatalytic degradation rhodamine B

Structural, optical, and dielectric properties of M/SnO2 (M= Al2O3, NiO, Mn3O4) nanocomposites

Contact Info

Product

Resources

About

Microstructure and photocatalytic activity of SnO2:Bi3+ nanoparticles

Cited by 10 publications

References 45 publications

Analyzing the role of Ni dopant to change the structural, optical and photocatalytic properties of SnO2 nanoparticles

Analyzing the role of Ni dopant to change the structural, optical and photocatalytic properties of SnO2 nanoparticles

Glycol 400 assisted preparation of high contact surface TiO2/GO nanocomposites for photocatalytic degradation rhodamine B

Structural, optical, and dielectric properties of M/SnO2 (M= Al2O3, NiO, Mn3O4) nanocomposites

Contact Info

Product

Resources

About

Analyzing the role of Ni dopant to change the structural, optical and photocatalytic properties of SnO₂ nanoparticles

Analyzing the role of Ni dopant to change the structural, optical and photocatalytic properties of SnO₂ nanoparticles

Glycol 400 assisted preparation of high contact surface TiO₂/GO nanocomposites for photocatalytic degradation rhodamine B