Photocatalytic and photo electrochemical properties of cadmium zinc sulfide solid solution in the presence of Pt and RuS2 dual co-catalysts

Gaikwad, A.P.; Tyagi, Deepak; Betty, C.A.; Sasikala, R.

doi:10.1016/j.apcata.2016.03.006

Cited by 60 publications

(32 citation statements)

References 48 publications

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“…The absence of additional peaks in the diffraction patterns confirms phase singularity for Cd x Zn 1‐x S composites. The lattice parameters for Cd x Zn 1‐x S composites are also calculated from the diffraction patterns and are tabulated in Table 1 in SI.…”

Section: Resultsmentioning

confidence: 99%

Enhance Solar‐Light‐Driven Photocatalytic Degradation of Norfloxacin Aqueous Solution by RGO‐Based Cd_xZn_1‐xS Alloy Composite with Band‐Gap Tuneability

et al. 2020

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The development of efficient photocatalyst for effective removal of antibiotics from aqueous solution is of great significance to protect the human and aquatic animals from antibiotic‐resistant. Herein, we report the solar light‐responsive photocatalytic activity of CdxZn1‐xS alloy semiconducting nanorods towards the degradation of norfloxacin, which is a widely used for treatment at reverse transcriptase inhibitor Urinary tract infection / respiratory tract infections and hospital‐acquired infections. The Cd0.8Zn0.2S alloy nanorod photocatalyst shows the highest photocatalytic activity with 71% degradation efficiency, which increases significantly with high degradation efficiency of 90%, after the formation of composite with RGO (reduced graphene oxide). In the composite, the RGO mats provide a duel role; it acts as a nucleation center as well as solid support for CdxZn1‐xS nanorods. The accountable reactive species for the degradation of norfloxacin are also explored expansively which exhibits that the hole has the most dominating role toward the degradation of norfloxacin. This work paves a simple eco‐friendly green pathway for the efficient removal of antibiotics aquatic pollutants under solar illumination.

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Section: Resultsmentioning

confidence: 99%

Enhance Solar‐Light‐Driven Photocatalytic Degradation of Norfloxacin Aqueous Solution by RGO‐Based Cd_xZn_1‐xS Alloy Composite with Band‐Gap Tuneability

et al. 2020

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“…1 Recently, the binary and ternary metal chalcogenides such as CdZnS, Cu 1 − x Ti 2 S 4, CdSSe, Fe 1 − x Co x S 2 , and NiSSe have been attracting increasing attention as the photocatalysts, especially in photocatalytic (PC) hydrogen evolution reaction (PCHER) systems. 5 In another study reported by Changwen Hu et al, Cd 0.5 Zn 0.5 SQDs@C 3 N 4 photocatalyst has been stated to show remarkable hydrogen production performance and high stability under visible light, which were attributed to strong electronic coupling between Cd 0.5 Zn 0.5 S and g-C 3 N 4. 1 The performance of a photocatalyst in the PCHER system is determined by the criteria of apparent quantum efficiency, charge separation, stability, and hydrogen production rate.…”

Section: Introductionmentioning

confidence: 94%

“…For instance, Sasikala et al have reported that the loading of Cd 0.5 Zn 0.5 S with dual Pt-RuS 2 cocatalyst enhanced PC activity, as a result of the increase in the separation of photogenerated charge carriers and migration to the catalyst surface. 5 In another study reported by Changwen Hu et al, Cd 0.5 Zn 0.5 SQDs@C 3 N 4 photocatalyst has been stated to show remarkable hydrogen production performance and high stability under visible light, which were attributed to strong electronic coupling between Cd 0.5 Zn 0.5 S and g-C 3 N 4. 6 In recent times, Cd (1 − x) Zn x S photocatalyst having controllable band structure has been drawing great attention with its excellent performance in PC hydrogen production via solar radiation.…”

Section: Introductionmentioning

confidence: 94%

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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“…In particular, Cd x Zn 1‐x S alloy is believed as an efficient one due to its tunable band gap, wide‐range light absorption, and good photochemical stability, and an optimum H 2 production rate (1097 μmol/h/g) can be achieved with x = 0.5. To reduce photoexcited carrier recombination and speed up H 2 production rate, hydrogen evolution reaction (HER) cocatalysts including Pt, Au, Pd, and Ag are usually used to load or decorate onto Cd x Zn 1‐x S nanoparticles or quantum dots (QDs) . For example, when Cd 0.5 Zn 0.5 S QDs were combined with Co‐Pt nanoparticles, the hydrogen production property was enhanced by 4.73 times .…”

Section: Introductionmentioning

confidence: 99%

Multifunctional MoS ₂ ultrathin nanoflakes loaded by Cd _0.5 Zn _0.5 S QDs for enhanced photocatalytic H ₂ production

et al. 2019

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Summary Two‐dimensional MoS2 has been widely used as hydrogen evolution reaction (HER) cocatalyst to load onto nanostructured semiconductors for visible light‐response photocatalytic hydrogen production. However, its another important role as light harvester because of the band‐gap tunable property and beneficial band position has been rarely exploited. Herein, few layer‐thick MoS2 nanoflakes with extended light absorption over the range of 400 to 680 nm and a photocatalytic HER rate of 0.98 mmol/h/g have been obtained. Then 7‐nm‐sized Cd0.5Zn0.5S quantum dots (QDs) are selectively grown upon ultrathin MoS2 nanoflakes for enhanced photocatalytic H2 generation. Upon the photocatalytic, light absorption, and charge transfer properties of the MoS2‐Cd0.5Zn0.5S composites evolved with the amount of MoS2 from 0 to 3 wt%, the multiple roles of MoS2 as long‐wavelength light absorber, in‐plane carrier mediator, and edge site‐active HER catalyst have been revealed. An optimum H2 generation rate of 8863 μmol/h/g and a solar to hydrogen (STH) efficiency of 2.15% have been achieved for 2 wt% MoS2‐Cd0.5Zn0.5S flakes. Such a strategy can be applied to other cocatalysts with both the light response and HER activity for efficient photocatalytic property.

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Photocatalytic and photo electrochemical properties of cadmium zinc sulfide solid solution in the presence of Pt and RuS2 dual co-catalysts

Cited by 60 publications

References 48 publications

Enhance Solar‐Light‐Driven Photocatalytic Degradation of Norfloxacin Aqueous Solution by RGO‐Based Cd_xZn_1‐xS Alloy Composite with Band‐Gap Tuneability

Enhance Solar‐Light‐Driven Photocatalytic Degradation of Norfloxacin Aqueous Solution by RGO‐Based Cd_xZn_1‐xS Alloy Composite with Band‐Gap Tuneability

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

Multifunctional MoS ₂ ultrathin nanoflakes loaded by Cd _0.5 Zn _0.5 S QDs for enhanced photocatalytic H ₂ production

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Photocatalytic and photo electrochemical properties of cadmium zinc sulfide solid solution in the presence of Pt and RuS2 dual co-catalysts

Cited by 60 publications

References 48 publications

Enhance Solar‐Light‐Driven Photocatalytic Degradation of Norfloxacin Aqueous Solution by RGO‐Based CdxZn1‐xS Alloy Composite with Band‐Gap Tuneability

Enhance Solar‐Light‐Driven Photocatalytic Degradation of Norfloxacin Aqueous Solution by RGO‐Based CdxZn1‐xS Alloy Composite with Band‐Gap Tuneability

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

Multifunctional MoS 2 ultrathin nanoflakes loaded by Cd 0.5 Zn 0.5 S QDs for enhanced photocatalytic H 2 production

Contact Info

Product

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Enhance Solar‐Light‐Driven Photocatalytic Degradation of Norfloxacin Aqueous Solution by RGO‐Based Cd_xZn_1‐xS Alloy Composite with Band‐Gap Tuneability

Enhance Solar‐Light‐Driven Photocatalytic Degradation of Norfloxacin Aqueous Solution by RGO‐Based Cd_xZn_1‐xS Alloy Composite with Band‐Gap Tuneability

Multifunctional MoS ₂ ultrathin nanoflakes loaded by Cd _0.5 Zn _0.5 S QDs for enhanced photocatalytic H ₂ production