Photo-Induced Phase Transition of CdZnS Based Nanocomposite at Room Temperature Under Solar Irradiation

Akyüz, Duygu; Koca, Atıf

doi:10.1007/s10562-019-02661-6

Cited by 4 publications

(7 citation statements)

References 40 publications

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“…Figures 1-3 illustrate XRD patterns of nanocomposites recorded before and after the PCHER. On the contrary of our previous reports, 24 the results of this study clearly explain the origin of the PIPT process. 01-079-6257).…”

Section: Resultscontrasting

confidence: 99%

“…12,24 2.4 | Synthesis of RGO-Cd (1 − x) Zn x S-(Pt, Ru, Rh) nanocomposites RGO-Cd (1 − x) Zn x S nanocomposites were loaded with platinum, ruthenium, and rhodium via photodeposition method. 12,24 2.4 | Synthesis of RGO-Cd (1 − x) Zn x S-(Pt, Ru, Rh) nanocomposites RGO-Cd (1 − x) Zn x S nanocomposites were loaded with platinum, ruthenium, and rhodium via photodeposition method.…”

Section: Synthesis Of Rgo-cd (1 − X) Zn X S Nanocompositementioning

confidence: 99%

“…The spherical-shaped RGO-Cd (1 − x) Zn x S nanocomposite was synthesized by the solvothermal method, and the procedure has been reported in the previous studies. 12,24 2.4 | Synthesis of RGO-Cd (1 − x) Zn x S-(Pt, Ru, Rh) nanocomposites RGO-Cd (1 − x) Zn x S nanocomposites were loaded with platinum, ruthenium, and rhodium via photodeposition method. Briefly, the optimized amount of RGO-Cd (1 − x) Zn x S nanocomposites was dispersed in 50 mL of Na 2 S (0.35 M)/Na 2 SO 3 (0.25 M) aqueous solution on a magnetic stirrer.…”

Section: Synthesis Of Rgo-cd (1 − X) Zn X S Nanocompositementioning

confidence: 99%

“…For instance, the decoration of CdS, ZnS, and/or Cd (1 − x) Zn x S nanoparticles with graphene and graphene derivatives such as graphitic carbon nitride (g-C 3 N 4 ), graphene oxide (GO), and reduced graphene oxide (RGO) have appeared as a promising method to overcome these insufficiencies, as a result of the increase in electronic conductivity, surface area, and PC stability. 23 In our last paper, 24 we have reported that photoinduced phase transformation (PIPT) of RGO-Cd (1 − x) Zn x S-Pt composites significantly increased the hydrogen evolution rate. PC materials modified with graphene and its derivatives have crucial importance for a various technological hydrogen production applications.…”

Section: Introductionmentioning

confidence: 98%

“…[19][20][21][22] For example, Im et al showed that increasing the pressure of H 2 S with a Nd: YAG pulsed laser in a glass reactor induced a phase change from SnS to SnS 2. 23 In our last paper, 24 we have reported that photoinduced phase transformation (PIPT) of RGO-Cd (1 − x) Zn x S-Pt composites significantly increased the hydrogen evolution rate. As a continuity of this achievement, in this study, our aim is to investigate the factors causing the PIPT process and to optimize these factors to improve the activity of the composites.…”

Section: Introductionmentioning

confidence: 98%

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Enhanced hydrogen production with photo‐induced phase transformation and cocatalyst loading

2019

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Summary In this study, reduced graphene oxide (RGO)‐Cd(1 − x)ZnxS nanocomposites have been synthesized with the solvothermal method in one pot. Moreover Pt, Ru, and Rh nanoparticles have been loaded on the RGO‐Cd(1 − x)ZnxS nanocomposites as cocatalysts with the aim of increasing the photocatalytic (PC) performance for hydrogen evolution reaction. The structure of Cd(1 − x)ZnxS blend transforms from cubic to hexagonal structure during the PC hydrogen evolution reaction (PCHER) at the room temperature. This photo‐induced phase transformation (PIPT) enhances not only the hydrogen evolution rate, but also the stability of the photocatalysts. Interestingly, RGO triggers the PIPT process only during the PCHER under solar light illumination. On the other hand, the loading of Pt, Ru, and Rh cocatalysts do not affect the PIPT process. However, they enhance the PC and photoelectrochemical (PEC) hydrogen production activity of RGO‐Cd(1 − x)ZnxS photocatalyst. PEC performance increases about 5.5 times when Pt (5%) and RGO are added to the Cd0.60Zn0.40S catalyst. RGO‐Cd0.60Zn0.40S including 1.5% Rh photocatalyst reaches a remarkable PC hydrogen production rate of 135 μmolh−1 with QE of 23.3% at 460 nm. Therefore, Rh cocatalyst appears as a good alternative to Pt.

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Section: Resultscontrasting

confidence: 99%