Effect of La on structural and photocatalytic activity of SnO2 nanoparticles under UV irradiation

Arif, Hafiz Shahab; Murtaza, Ghulam; Hanif, Hajira; Ali, H S S; Yaseen, Muhammad; Khalid, N.R.

doi:10.1016/j.jece.2017.07.043

Cited by 23 publications

(7 citation statements)

References 29 publications

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“…Besides, compared with the binding energy of Sc 2 O 3 (401.9 eV), Y 2 O 3 (156.6 eV), and Ln 2 O 3 (835.2 eV) [46], the shift to lower binding energy with different degrees indicates that Ln 3+ exists in a substitutional or interstitial bonding mode of Sn-O-Ln [47]. The narrow spectra of Sc 2p, Y 3d, and La 3d are manifested in Figure 1(d) and , ; all characteristic peaks can be assigned to +3 oxidation state of Ln [48, 49].…”

Section: Resultsmentioning

confidence: 99%

High-Performance and Hysteresis-Free Perovskite Solar Cells Based on Rare-Earth-Doped SnO ₂ Mesoporous Scaffold

Guo

Yang

et al. 2019

Research

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Tin oxide (SnO2), as electron transport material to substitute titanium oxide (TiO2) in perovskite solar cells (PSCs), has aroused wide interests. However, the performance of the PSCs based on SnO2 is still hard to compete with the TiO2-based devices. Herein, a novel strategy is designed to enhance the photovoltaic performance and long-term stability of PSCs by integrating rare-earth ions Ln3+ (Sc3+, Y3+, La3+) with SnO2 nanospheres as mesoporous scaffold. The doping of Ln promotes the formation of dense and large-sized perovskite crystals, which facilitate interfacial contact of electron transport layer/perovskite layer and improve charge transport dynamics. Ln dopant optimizes the energy level of perovskite layer, reduces the charge transport resistance, and mitigates the trap state density. As a result, the optimized mesoporous PSC achieves a champion power conversion efficiency (PCE) of 20.63% without hysteresis, while the undoped PSC obtains an efficiency of 19.01%. The investigation demonstrates that the rare-earth doping is low-cost and effective method to improve the photovoltaic performance of SnO2-based PSCs.

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Section: Resultsmentioning

confidence: 99%

High-Performance and Hysteresis-Free Perovskite Solar Cells Based on Rare-Earth-Doped SnO ₂ Mesoporous Scaffold

Guo

Yang

et al. 2019

Research

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“…In addition, the incorporation of La ions have increased the BET specific surface area as shown in Table 1, thus allowing an extensive amount of organic compounds adsorbed on the photocatalyst sur-face. On the other hand, the reduction of photocatalytic degradation for 5 wt% La/CaO may be due to the excess doping metal into photocatalyst which created recombination center for photogenerated charge carriers [37]. Figure 6 demonstrates the morphology of 1 wt%, 3 wt%, and 5 wt% of La/CaO photocatalyst respectively before and after the photocatalytic treatment.…”

Section: Effect Of Lanthanum Concentrationmentioning

confidence: 99%

“…The additional small amount of doping element like rare earth metals into photocatalyst is used to improve rate of trapping recombination sites of photogenerated electron-hole pairs resulting in the reduction of the quantum efficiency [21,35,36]. Lanthanum (La) is chosen as the dopant as it can enhance the photocatalytic reaction and gives varied effects on optical properties [37]. Based on the best of our knowledge, there are very limited research has been done in application of CaO photocatalyst in POME treatment.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of La-Doped CaO Derived from Cockle Shells for Photodegradation of POME

Ghazali

Kem

Abdullah

et al. 2019

Bull. Chem. React. Eng. Catal.

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Photocatalysis has merged to be one of the most promising technology in wastewater remediation. However, the application of photocatalysis in treating palm oil mill effluent (POME) is still limited. Many researches were conducted to explore simple and cost-effective alternatives to replace TiO2 for various industrial purposes. Therefore, the aim of this study is to synthesize and characterize lanthanum doped calcium oxide (La/CaO) as photocatalyst as well as to evaluate the performance of these photocatalysts in the degradation of POME. The photocatalyst used in this study was converted from cockle shells to transform into calcium oxide (CaO) through calcination process. The CaO produced was doped with 1 wt%, 3 wt%, and 5 wt% of lanthanum (La) using wet impregnation method to enhance its photocatalytic activity. The photocatalysts were characterised using X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Brunauer-Emmett-Teller (BET), Scanning Electron Microscopy (SEM), Energy-Dispersion X-ray (EDX), and Inductively Coupled Plasma Mass Spectrometry (ICPMS). Then, this photocatalyst was performed on POME under UVC in a batch system by using different La/CaO at optimum catalyst dosage of 3.0 g/L. Through this research, it was found that the POME degradation through photocatalytic reaction was increased with the incorporation of La where 3 wt% La/CaO showed the highest POME degradation compared to others. This is due to the larger BET surface area that provides more active sites resulted from the incorporation of La. The findings of this study imply that the contaminants in POME can be reduced by utilizing CaO derived from cockle shells. , respectively [1]. Freely discharged of POME can bring severe impacts to the environment and increase the likelihood of affecting the aquatic life and decreasing the water quality because it contains high level of pollutants such as suspended solid, residual oil and grease, chemical oxygen demand (COD), and biochemical oxygen demand (BOD). At presence, numerous conventional methods have been used in treating POME such as anaerobic digestion [2][3][4][5], membrane technology [6][7][8], and adsorp-

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“…Among methods, photocatalysis is the best option since it is a green technique that employs naturally renewable solar energy and functioned at room temperature and pressure [ 10 – 14 ]. Recently, semiconductor photocatalysts such as TiO 2 [ 15 ], ZnO [ 16 ], ZnS [ 17 , 18 ], SnO 2 [ 19 , 20 ], and (WO 4 ) [ 21 ] have been widely used in wastewater treatment. Due to its high stability, low cost, nontoxicity, great photoelectric conversion efficiency, and controllable material, ZnO is the most efficient semiconductor photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Biogenic Synthesis of Cu‐Doped ZnO Photocatalyst for the Removal of Organic Dye

Lemecho

Sabir

Andoshe

et al. 2022

Bioinorganic Chemistry and Applications

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The Cu-doped ZnO photocatalysts were prepared with a green and coprecipitation approach by using water hyacinth (Eichhornia crassipes) aquatic plant extract. In the preparation process, different amount of copper precursors such as 1, 2, 3, 4, and 5% of molar ratio were added to zinc nitrate precursors and abbreviated as Cu-ZnO (1%), Cu-ZnO (2%), Cu-ZnO (3%), Cu-ZnO (4%), and Cu-ZnO (5%), respectively. The characterization of the obtained samples was carried out, and the removal of the methylene blue (MB) dye was examined. Out of all catalysts, Cu-ZnO (3%) had the best photocatalytic performance and 89% of the MB dye was degraded. However, the degradation performances of blank (without catalysts), ZnO, Cu-ZnO (1%), Cu-ZnO (2%), Cu-ZnO (4%), and Cu-ZnO (5%) catalysts were 6, 54, 69, 83, 80, and 73%, respectively. Therefore, the use of water hyacinth plant extract with the optimum amount of Cu added to ZnO during the preparation of the catalyst could have a promising application in the degradation of organic pollutants.

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Effect of La on structural and photocatalytic activity of SnO2 nanoparticles under UV irradiation

Cited by 23 publications

References 29 publications

High-Performance and Hysteresis-Free Perovskite Solar Cells Based on Rare-Earth-Doped SnO ₂ Mesoporous Scaffold

High-Performance and Hysteresis-Free Perovskite Solar Cells Based on Rare-Earth-Doped SnO ₂ Mesoporous Scaffold

Evaluation of La-Doped CaO Derived from Cockle Shells for Photodegradation of POME

Biogenic Synthesis of Cu‐Doped ZnO Photocatalyst for the Removal of Organic Dye

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Effect of La on structural and photocatalytic activity of SnO2 nanoparticles under UV irradiation

Cited by 23 publications

References 29 publications

High-Performance and Hysteresis-Free Perovskite Solar Cells Based on Rare-Earth-Doped SnO 2 Mesoporous Scaffold

High-Performance and Hysteresis-Free Perovskite Solar Cells Based on Rare-Earth-Doped SnO 2 Mesoporous Scaffold

Evaluation of La-Doped CaO Derived from Cockle Shells for Photodegradation of POME

Biogenic Synthesis of Cu‐Doped ZnO Photocatalyst for the Removal of Organic Dye

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High-Performance and Hysteresis-Free Perovskite Solar Cells Based on Rare-Earth-Doped SnO ₂ Mesoporous Scaffold

High-Performance and Hysteresis-Free Perovskite Solar Cells Based on Rare-Earth-Doped SnO ₂ Mesoporous Scaffold