One-pot molten salt synthesis of CdNb2O6/Cd2Nb2O7 heterojunction photocatalysts with enhanced photocatalytic properties

Zhang, Dafeng; Meng, Xiao; Yu, Muhuo; Pu, Xipeng; Ge, Bo; Li, Wenzhi; Dou, Jianmin

doi:10.1016/j.seppur.2017.06.026

Cited by 13 publications

(3 citation statements)

References 27 publications

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“…Therefore, the CB of CZS was −0.34 V (vs NHE). The value of the valence band (VB) was calculated by the band gap equation E VB = E CB + E g where E g is 2.36 eV . Consequently, the VB potential of CZS is 2.02 V.…”

Section: Resultsmentioning

confidence: 99%

“…where E g is 2.36 eV. 55 Consequently, the VB potential of CZS is 2.02 V. DFT Calculation and Possible Mechanism. Based on the theoretical prediction and experimental results, the possible mechanism and charge transfer pathway of cocatalyst enhancing photocatalytic performance were further understood by using the DFT calculation method.…”

Section: ■ Introductionmentioning

confidence: 99%

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Decorating Cd_0.9Zn_0.1S Using a Magnetic FeCo@ N-Doped Graphite Carbon Layer to Achieve Considerable Hydrogen Evolution Efficiency

Zhang,

Fan

et al. 2024

ACS Sustainable Chem. Eng.

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Photocatalytic hydrogen production technology has emerged as one of the most promising technologies to address the future energy crisis. Cd0.9Zn0.1S (CZS) is a promising photocatalyst for visible light activation but is limited by the slow kinetics of photoexcited carrier separation. Density functional theory (DFT) calculations based on first-principles showed that the introduction of a cocatalyst, N-doped graphite carbon (FC@NC), could effectively reduce the adsorption free energy of hydrogen, thus accelerating the hydrogen reaction kinetics of CZS. Supported by theoretical predictions, magnetic FC@NC nanoparticles were successfully prepared by precipitation and calcination and then combined with tetrapod CZS by ultrasonic self-assembly and calcination to form the FC@NC/CZS composite photocatalyst with Schottky contact. The FC@NC/CZS composite photocatalyst with the best mass ratio of FC@NC proved a considerable photocatalytic hydrogen evolution rate up to 79.9 ± 0.1 mmol g–1 h–1 under visible light exposure, which was 4.4 ± 0.1 times that of pristine CZS, and the apparent quantum efficiency (AQE) at 450 nm was as high as 52%. Finally, based on the experimental results and DFT calculations, a possible mechanism for the enhanced photocatalytic activity of FC@NC/CZS composites with the Schottky heterojunction was first proposed. In general, we attribute the boosted and stable photocatalytic property of FC@NC/CZS photocatalytic performance to the following three aspects: (1) the bimetallic alloy cocatalyst easily acts as an electron collector, (2) the graphite carbon layer protects the alloy from oxidation, and (3) the nitrogen-doped carbon layer provides more active sites for the reaction. This work provided a green and economical technique for an efficient hydrogen evolution reaction using light energy in the environment.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Decorating Cd_0.9Zn_0.1S Using a Magnetic FeCo@ N-Doped Graphite Carbon Layer to Achieve Considerable Hydrogen Evolution Efficiency

Zhang,

Fan

et al. 2024

ACS Sustainable Chem. Eng.

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“…Bulk LFO particles were synthesized via a molten salt method. Li 2 CO 3 , Fe 2 O 3 , and Na 2 SO 4 –Li 2 SO 4 − were mixed in a molar ratio of [Li]/[Fe] = 1:5 and a molar ratio of LFO/Na 2 SO 4 –Li 2 SO 4 = 1:5. The mixture was ground in ethanol for 4 h. The mixture was transferred to a crucible after drying.…”

Section: Methodsmentioning

confidence: 99%

Facile Synthesis of Flowerlike LiFe₅O₈ Microspheres for Electrochemical Supercapacitors

et al. 2017

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Facile synthesis of porous and hollow spinel materials is very urgent due to their extensive applications in the field of energy storage. In present work, flowerlike porous LiFeO microspheres etched for 15, 30, and 45 min (named as p-LFO-15, p-LFO-30, and p-LFO-45, respectively) are successfully synthesized through a facile chemical etching method based on bulk LiFeO (LFO) particles as precursors, and they are applied as electrode materials for high-performance electrochemical capacitors. In particular, the specific surface area of p-LFO-45 reaches 46.13 m g, which is 112 times greater than that of the unetched counterpart. Therefore, the p-LFO-45 electrode can achieve a higher capacitance of 278 F g at a scan rate of 5 mV s than the unetched counterpart. Furthermore, the p-LFO-45 electrode presents a good cycling stability with 78.3% of capacitive retention after 2000 cycles, which is much higher than that of the unetched LFO particles (66%). Therefore, the flowerlike porous LFO microspheres are very promising candidate materials for supercapacitor applications.

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Heat capacities and thermodynamic functions of CdNb2O6 and CdTa2O6

İlhan

2022

J Therm Anal Calorim

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One-pot molten salt synthesis of CdNb2O6/Cd2Nb2O7 heterojunction photocatalysts with enhanced photocatalytic properties

Cited by 13 publications

References 27 publications

Decorating Cd_0.9Zn_0.1S Using a Magnetic FeCo@ N-Doped Graphite Carbon Layer to Achieve Considerable Hydrogen Evolution Efficiency

Decorating Cd_0.9Zn_0.1S Using a Magnetic FeCo@ N-Doped Graphite Carbon Layer to Achieve Considerable Hydrogen Evolution Efficiency

Facile Synthesis of Flowerlike LiFe₅O₈ Microspheres for Electrochemical Supercapacitors

Heat capacities and thermodynamic functions of CdNb2O6 and CdTa2O6

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One-pot molten salt synthesis of CdNb2O6/Cd2Nb2O7 heterojunction photocatalysts with enhanced photocatalytic properties

Cited by 13 publications

References 27 publications

Decorating Cd0.9Zn0.1S Using a Magnetic FeCo@ N-Doped Graphite Carbon Layer to Achieve Considerable Hydrogen Evolution Efficiency

Decorating Cd0.9Zn0.1S Using a Magnetic FeCo@ N-Doped Graphite Carbon Layer to Achieve Considerable Hydrogen Evolution Efficiency

Facile Synthesis of Flowerlike LiFe5O8 Microspheres for Electrochemical Supercapacitors

Heat capacities and thermodynamic functions of CdNb2O6 and CdTa2O6

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Decorating Cd_0.9Zn_0.1S Using a Magnetic FeCo@ N-Doped Graphite Carbon Layer to Achieve Considerable Hydrogen Evolution Efficiency

Decorating Cd_0.9Zn_0.1S Using a Magnetic FeCo@ N-Doped Graphite Carbon Layer to Achieve Considerable Hydrogen Evolution Efficiency

Facile Synthesis of Flowerlike LiFe₅O₈ Microspheres for Electrochemical Supercapacitors