Engineering the doping amount of rare earth element erbium in CdWO4: Influence on the electrochemical performance and the application to the electrochemical detection of bisphenol A

Chen, Siyu; Liu, Pan; Li, Yang; Zhu, Mengyi; Dang, Yuan; Zhou, Yuanzhen

doi:10.1016/j.jelechem.2021.115867

Cited by 10 publications

(3 citation statements)

References 63 publications

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“…Substituting the cations of the host oxide with another cation could disrupt chemical bonding, which might be an effective strategy for regulating oxygen species in catalysts . Rare earth elements demonstrated distinctive electronic transitions within 4f–5d and 4f–4f, making it possible to modulate the electronic configuration of the host oxide. , Hence, in this study, spinel CoMn 2 O 4 catalysts were successfully doped with the rare earth elements lanthanum and cerium by the solvothermal method and tested for catalytic oxidation of VOCs. It was demonstrated that doping of rare earth elements could introduce abundant oxygen vacancies into spinel, especially with the element lanthanum, and it exhibited a huge enhancement in catalytic activity of toluene oxidation ( T 90 = 205 °C) compared to the Co 1 Mn 2 sample ( T 90 = 250 °C).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Catalytic Performance of La-Doped CoMn₂O₄ Catalysts by Regulating Oxygen Species Activity for VOCs Oxidation

et al. 2023

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Tuning the oxygen species activity of transition metal oxide catalysts is essential for harnessing environmental catalytic oxidation reactions, and the mobility of lattice oxygen and activation ability of gas oxygen over CoMn2O4 were well modulated by in situ solvothermal-induced lanthanum doping for VOCs oxidation. Lanthanum species were successfully doped into the spinel lattice, and the toluene oxidation rate of Co1Mn1.9La0.1 increased by 20.74 times compared with that of the undoped Co1Mn2 catalyst at 220 °C. With lanthanum doping, the content of oxygen vacancies was remarkably increased (1.4-fold) due to oxygen atoms in unusual bonding situations. Higher mobility and reactivity of lattice oxygen species were achieved by weakening the metal–oxygen bond strength, favoring the conversion of toluene to CO2 and H2O. Furthermore, doping lanthanum into the spinel lattice also promoted the activation and replenishment of gas oxygen. Moreover, the oxidation of anhydride species, as a rate-determining step, could be significantly accelerated due to lanthanum doping. This work provided a credible comprehension of the regulation of spinel oxygen species by lanthanum doping in VOCs abatement to improve the atmospheric environment.

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Section: Introductionmentioning

confidence: 99%

Enhanced Catalytic Performance of La-Doped CoMn₂O₄ Catalysts by Regulating Oxygen Species Activity for VOCs Oxidation

et al. 2023

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“…Rare earth elements have shown superior electrical, thermoelectric, magnetic, optical, and biological properties due to their incompletely occupied 4f electronic configuration, which have been widely used in many fields consisting of electronics, metallurgy, aerospace, photolysis, fuel cell, etc. [ 31 – 33 ]. Some rare earth elements have also been used to improve the activity and stability of PbO 2 anodes.…”

Section: Introductionmentioning

confidence: 99%

Y-mediated optimization of 3DG-PbO2 anode for electrochemical degradation of PFOS

Duan,

Ning,

Wang

et al. 2023

BMC Chemistry

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In our previous study, the three-dimensional graphene-modified PbO2 (3DG-PbO2) anode was prepared for the effective degradation of perfluorooctanesulfonat (PFOS) by the electrochemical oxidation process. However, the mineralization efficiency of PFOS at the 3DG-PbO2 anode still needs to be further improved due to the recalcitrance of PFOS. Thus, in this study, the yttrium (Y) was doped into the 3DG-PbO2 film to further improve the electrochemical activity of the PbO2 anode. To optimize the doping amount of Y, three Y and 3DG codoped PbO2 anodes were fabricated with different Y3+ concentrations of 5, 15, and 30 mM in the electroplating solution, which were named Y/3DG-PbO2-5, Y/3DG-PbO2-15 and Y/3DG-PbO2-30, respectively. The results of morphological, structural, and electrochemical characterization revealed that doping Y into the 3DG-PbO2 anode further refined the β-PbO2 crystals, increased the oxygen evolution overpotential and active sites, and reduced the electron transfer resistance, resulting in a superior electrocatalytic activity. Among all the prepared anodes, the Y/3DG-PbO2-15 anode exhibited the best activity for electrochemical oxidation of PFOS. After 120 min of electrolysis, the TOC removal efficiency was 80.89% with Y/3DG-PbO2-15 anode, greatly higher than 69.13% with 3DG-PbO2 anode. In addition, the effect of operating parameters on PFOS removal was analyzed by response surface, and the obtained optimum values of current density, initial PFOS concentration, pH, and Na2SO4 concentration were 50 mA/cm2, 12.21 mg/L, 5.39, and 0.01 M, respectively. Under the optimal conditions, the PFOS removal efficiency reached up to 97.16% after 40 min of electrolysis. The results of the present study confirmed that the Y/3DG-PbO2 was a promising anode for electrocatalytic oxidation of persistent organic pollutants.

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“…Numerous efforts have been conducted to address these limitations and improve the photocatalytic performance of CdWO 4 . For instance, various strategies such as metal doping, , sensitization with plasmonic elements, , and combination with carbon family materials , have been attempted, but these approaches could not be able to efficiently improve the as-mentioned thermodynamic restrictions of CdWO 4. In this regard, combination of oxidation CdWO 4 with a visible-responsive reduction semiconductor could be the most efficient way to address these limitations, which is known as a “semiconductor–semiconductor heterojunction” strategy .…”

Section: Introductionmentioning

confidence: 99%

Rational Construction of a 0D/1D S-Scheme CeO₂/CdWO₄ Heterojunction for Photocatalytic CO₂ Reduction and H₂ Production

Bahadoran

Ramakrishna

Masudy‐Panah

et al. 2022

Ind. Eng. Chem. Res.

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In this work, CeO 2 quantum dots were anchored on the surface of oxygen defected CdWO 4 nanorods through a simple precipitation procedure to construct an efficient S-scheme heterojunction. The as-fabricated pristine and hybrid photocatalysts were thoroughly characterized by XRD, BET, SEM, HRTEM, and XPS analyses and applied for the photoreduction of CO 2 and photocatalytic hydrogen evolution under simulated sunlight irradiation. The results revealed that CH 4 and CO were the major products and CH 3 OH was detected as the side product from the photoreduction of CO 2 . The photoreduction yield of the heterojunction was substantially improved with the addition of CeO 2 as compared to the pure samples, and the heterojunction containing 40 mol % CeO 2 showed the highest efficiency. This improvement could be mainly ascribed to the higher reduction potential of the separated electrons and exceptional mobility of charge carriers. Additionally, the adsorption of CO 2 and hydroxyl groups was increased due to the increased density of oxygen vacancy sites at the interfacial contacts acting as trapping centers for photoexcited electrons. Based on the experimental and theoretical results, S-scheme charge transfer was proposed for the fabricated CdWO 4 -CeO 2 heterojunction.

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Engineering the doping amount of rare earth element erbium in CdWO4: Influence on the electrochemical performance and the application to the electrochemical detection of bisphenol A

Cited by 10 publications

References 63 publications

Enhanced Catalytic Performance of La-Doped CoMn₂O₄ Catalysts by Regulating Oxygen Species Activity for VOCs Oxidation

Enhanced Catalytic Performance of La-Doped CoMn₂O₄ Catalysts by Regulating Oxygen Species Activity for VOCs Oxidation

Y-mediated optimization of 3DG-PbO2 anode for electrochemical degradation of PFOS

Rational Construction of a 0D/1D S-Scheme CeO₂/CdWO₄ Heterojunction for Photocatalytic CO₂ Reduction and H₂ Production

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Engineering the doping amount of rare earth element erbium in CdWO4: Influence on the electrochemical performance and the application to the electrochemical detection of bisphenol A

Cited by 10 publications

References 63 publications

Enhanced Catalytic Performance of La-Doped CoMn2O4 Catalysts by Regulating Oxygen Species Activity for VOCs Oxidation

Enhanced Catalytic Performance of La-Doped CoMn2O4 Catalysts by Regulating Oxygen Species Activity for VOCs Oxidation

Y-mediated optimization of 3DG-PbO2 anode for electrochemical degradation of PFOS

Rational Construction of a 0D/1D S-Scheme CeO2/CdWO4 Heterojunction for Photocatalytic CO2 Reduction and H2 Production

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Enhanced Catalytic Performance of La-Doped CoMn₂O₄ Catalysts by Regulating Oxygen Species Activity for VOCs Oxidation

Enhanced Catalytic Performance of La-Doped CoMn₂O₄ Catalysts by Regulating Oxygen Species Activity for VOCs Oxidation

Rational Construction of a 0D/1D S-Scheme CeO₂/CdWO₄ Heterojunction for Photocatalytic CO₂ Reduction and H₂ Production