A remarkable improvement in photocatalytic activity of ZnO nanoparticles through Sr doping synthesized by one pot flash combustion technique for water treatments

Shkir, Mohd.; Al-Shehri, Badria M.; Pachamuthu, Muthusamy Poomalai; Khan, Aslam; Chandekar, Kamlesh V.; AlFaify, S.; Hamdy, Mohamed S.

doi:10.1016/j.colsurfa.2019.124340

Cited by 72 publications

(17 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Shkir et al have investigated the photocatalytic efficiency of Tb–ZnO and Sr–ZnO. 19 , 20 Chandekar and co-workers have developed La–ZnO as an active photocatalyst by the flash combustion route. 21 Similarly, other researchers have implanted other metals such as La, Mn, Bi, Fe, and Cu on ZnO for the improvement in photocatalytic efficiency of ZnO.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Co–ZnO and Evaluation of Its Photocatalytic Activity for Photodegradation of Methyl Orange

et al. 2021

View full text Add to dashboard Cite

Photocatalysis is one of the techniques used for the eradication of organic pollutants from wastewater. In this study, Co−ZnO was tested as a photocatalyst for the degradation of methyl orange under irradiation of visible light. Co−ZnO loaded with 5%, 10%, and 15% Co was prepared by the precipitation method. The advanced techniques including X-ray diffraction, X-ray photoelectron spectroscopy, diffuse reflectance UV−visible spectroscopy, photoelectrochemical measurements, temperatureprogrammed desorption, photoluminescence, and fluorescence spectroscopy related to OH • measurements were used for characterization of prepared Co−ZnO. Experiments showed that 10% Co−ZnO was a highly efficient catalyst for the photodegradation of methyl orange as compared to ZnO. The enhanced photocatalytic activity of Co−ZnO is attributed to the implantation of Co which inhibits the electron−hole recombination. A 100 mg/L solution of methyl orange dye was completely degraded within 130 min. The reaction kinetics has been described in terms of the Eley−Rideal mechanism.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Co–ZnO and Evaluation of Its Photocatalytic Activity for Photodegradation of Methyl Orange

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Figure 5c shows the DRS to estimate the bandgap energy, which is obtained from the Kubelka-Munk function equation. [22] The bandgap of α-FeOOH is estimated to be 1.95 eV, while CeF 3 is 4.15 eV. The conduction band (CB) positions were determined by the MS plots (Figure 5d).…”

Section: Introductionmentioning

confidence: 99%

Sacrificial Reagent Free Photocatalytic Oxygen Evolution over CeF₃/α‐FeOOH Nanohybrid

Han

Lou

Liu

et al. 2021

Adv Materials Inter

View full text Add to dashboard Cite

significantly enhances the photocatalytic oxygen evolution performance without any sacrificial reagent. Guan successfully synthesized a same Si/MgTiO 3 heterostructures, which performed a decent H 2 generation from pure water without any sacrificial reagents. [6] Moreover, metallic conduction can be achieved at the crystalline-amorphous homointerface via electronic interface reconstruction to enhance the electron transport. [7] Our group and Huang's group have previously reported the modified CeF 3 nanoparticles on photocatalytic degradation of organic pollutants under visible light. [8] To further modify the CeF 3 nanoparticles, this work purposes to establish a crystalline-amorphous structure for oxygen evolution with sacrificial reagent free. Fe-based oxide/(oxy)hydroxides have been exploited as promising catalysts for gas-evolution due to their narrow bandgap and environment friendliness. [9] Amorphous, αand β-FeOOH are three classical crystal structures of FeOOH for HER or OER catalysts. [10] Many crystalline FeOOH photocatalysts were fabricated to attain a remarkable hydrogen-evolution efficiency. Moreover, previous studies have reported that amorphous samples of FeOOH usually surpass that of crystalline counterparts on OER performance. [11] Conscious of this, amorphous FeOOH is anticipated that it may facilitate carriers separation and transfer to enhance photocatalytic oxygen-evolution effectively.Herein, we constructed CeF 3 /α-FeOOH nanohybrids by onestep hydrothermal method, and further used them for photocatalytic oxygen-evolution from water splitting. Amorphous α-FeOOH assures the charge-carrier transfer efficiently and builds crystalline-amorphous interface to form metalsemiconductor like structure. The CeF 3 /α-FeOOH nanohybrids performed significantly enhanced water oxidation activity compared with that of pure CeF 3 in the absence of sacrificial reagent. Furthermore, the photocatalyst is still stable after repeated cycling. As far as we know, this work is probably the best oxygen-evolution rate with sacrificial reagent free. Results and DiscussionThe approach to produce CeF 3 /α-FeOOH nanohybrids is a onestep process using the hydrothermal method under the condition of different Fe 3+ concentrations. The crystal structures of the CeF 3 /α-FeOOH nanohybrids are demonstrated by X-ray diffraction (XRD) patterns and Fourier transform infrared (FTIR) Water oxidation is a crucial step in photocatalytic water splitting, but it still remains a great challenge for its complex four-electron process. Herein, uniform CeF 3 /α-FeOOH nanohybrids are synthesized by one-step hydrothermal process. The obtained CeF 3 /α-FeOOH nanohybrids exhibit a significantly high photocatalytic oxygen-evolution activity with sacrifice reagent free. The optimal CeF 3 /α-FeOOH-400 nanohybrid reaches a remarkable rate up to 4702.5 µmol g −1 h −1 , which is 2.6 times higher than that of CeF 3 /α-FeOOH-0 nanohybrid. The recycling experiments further indicate its potential in oxygen evolution. The metal-like α-FeOOH may improve the...

show abstract

“…In order to expand the potential applications and improve the application properties of ZnO, many researchers have tried to modify ZnO with different materials, such as metals 7 and semiconductors. 8 Among them, ZnO compounded with metallic nanoparticles (NPs) has received signicant attention, such as Sr/ZnO, [9][10][11] Cu/ ZnO, 12,13 Ag/ZnO, [13][14][15] Au/ZnO, 16,17 Ce/ZnO, 18,19 and so forth. Kumar et al proposed that metal-semiconductor nanocomposite lms have a wide range of promising applications in plasma and photonic elds, such as optical sensing, photoemitters, and photoelectric conversion elds.…”

Section: Introductionmentioning

confidence: 99%

Two-step strategy, growth mechanism and optical properties of plasmonic Ag-modified ZnO nanomaterials

Wang

Yao

et al. 2022

RSC Adv.

View full text Add to dashboard Cite

show abstract

A remarkable improvement in photocatalytic activity of ZnO nanoparticles through Sr doping synthesized by one pot flash combustion technique for water treatments

Cited by 72 publications

References 73 publications

Synthesis and Characterization of Co–ZnO and Evaluation of Its Photocatalytic Activity for Photodegradation of Methyl Orange

Synthesis and Characterization of Co–ZnO and Evaluation of Its Photocatalytic Activity for Photodegradation of Methyl Orange

Sacrificial Reagent Free Photocatalytic Oxygen Evolution over CeF₃/α‐FeOOH Nanohybrid

Two-step strategy, growth mechanism and optical properties of plasmonic Ag-modified ZnO nanomaterials

Contact Info

Product

Resources

About

A remarkable improvement in photocatalytic activity of ZnO nanoparticles through Sr doping synthesized by one pot flash combustion technique for water treatments

Cited by 72 publications

References 73 publications

Synthesis and Characterization of Co–ZnO and Evaluation of Its Photocatalytic Activity for Photodegradation of Methyl Orange

Synthesis and Characterization of Co–ZnO and Evaluation of Its Photocatalytic Activity for Photodegradation of Methyl Orange

Sacrificial Reagent Free Photocatalytic Oxygen Evolution over CeF3/α‐FeOOH Nanohybrid

Two-step strategy, growth mechanism and optical properties of plasmonic Ag-modified ZnO nanomaterials

Contact Info

Product

Resources

About

Sacrificial Reagent Free Photocatalytic Oxygen Evolution over CeF₃/α‐FeOOH Nanohybrid