Morphology control and phase transformation of ZIS/TiO2 into CdSe(en)0.5/CIS/TiO2 photoanode for enhanced solar hydrogen generation

Bae, Ho-Sub; Patil, Ruturaj P.; Chae, Weon‐Sik; Ryu, Jungho; Mahadik, Mahadeo A.; Jang, Jum Suk

doi:10.1016/j.cej.2019.123871

Cited by 18 publications

(8 citation statements)

References 55 publications

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“…After the bacterial membrane and Pd(1)Co(1)/ATO (red) photocatalyst are well attached, the surface of E. coli cells was damaged with the intracellular components inside the cell wall due to the formation of ROS . The photocatalytic inactivation against E.…”

Section: Resultsmentioning

confidence: 99%

“…After the bacterial membrane and Pd(1)-Co(1)/ATO (red) photocatalyst are well attached, the surface of E. coli cells was damaged with the intracellular components inside the cell wall due to the formation of ROS. 32 The photocatalytic inactivation against E. coli could be further studied by a bio-fluorescence microscopic technique including a staining process. The cell viability is characterized by the indicators of color and strength; strong green fluorescence indicates live bacteria, while weak red fluorescence is for the dead cells.…”

Section: Photocatalytic Disinfection Of E Coli and S Aureusmentioning

confidence: 99%

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Hydrogen-Treated TiO₂ Nanorods Decorated with Bimetallic Pd–Co Nanoparticles for Photocatalytic Degradation of Organic Pollutants and Bacterial Inactivation

Hwang

Manikandan

Patil

et al. 2023

ACS Appl. Nano Mater.

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Herein, first, we synthesize a multifunctional photocatalyst via metal oxides loaded (Co/Pd) on acid-treated TiO2 nanorods (ATO) and further introduce hydrogen annealing treatment. The hydrogen annealing treatment introduces metal oxides converted into a bimetallic form and delays the photogenerated charge recombination process. Also, oxygen vacancies are formed due to the partial reduction of Ti4+ to Ti3+ sites. In addition, oxygen vacancies help to improve photocatalytic degradation and antibacterial activity. The hydrogen-treated photocatalyst (Pd(1)Co(1)/ATO (red)) demonstrates high degradation efficiencies of 99.63 and 99.90% (180 min) for orange II dye and BPA degradation, respectively, and an antibacterial activity of 97.00% (120 min) under one sun irradiation. In the photocatalytic removal of abiotic pollutants and live bacteria, the trapping experiment suggests that radical species (•O2 – and •OH), assisted by photoinduced holes, are responsible for the high activities. The photoelectrochemical performance and time-resolved PL (TRPL) study illustrate that Pd(1)Co(1)/ATO (red) reveals superior photoelectrochemical charge separation (electron–hole), lower resistance, and shorter lifetime (τ1 = 0.40 ns) as a photocatalyst. Finally, plausible charge transport mechanisms are proposed for the photocatalytic degradation of organic dye and bacterial disinfection over the Pd(1)Co(1)/ATO (red) photocatalyst.

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Section: Resultsmentioning

confidence: 99%

Section: Photocatalytic Disinfection Of E Coli and S Aureusmentioning

confidence: 99%

Hydrogen-Treated TiO₂ Nanorods Decorated with Bimetallic Pd–Co Nanoparticles for Photocatalytic Degradation of Organic Pollutants and Bacterial Inactivation

Hwang

Manikandan

Patil

et al. 2023

ACS Appl. Nano Mater.

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“…Furthermore, the ZnO NR serves as a conductor for photoelectrons directly through it to the Zinc foil. 22 In the presence of a polysulfide electrolyte, the . 45 Finally, hydrogen is generated when the photoelectrons reach the Pt counter electrode.…”

Section: Resultsmentioning

confidence: 99%

“…A previous study demonstrated that the Zn 1−x Cd x Se phase was formed separately during crystal growth and presented as deep-red PL near its bandgap. 22 Thus, the deep-red PL at ∼740 nm was assigned to the separated Zn 1−x Cd x Se phase. The porous Zn 1−x Cd x Se/ZnO NR-160 heterojunction photoanode showed better PEC performance and distinct electronic state distributions, resulting in enhanced absorption at 750−800 nm, as indicated in Figure S5 (dotted circle).…”

Section: Resultsmentioning

confidence: 99%

Porous Zn_1–xCd_xSe/ZnO Nanorod Photoanode Fabricated from ZnO Building Blocks Grown on Zn Foil for Photoelectrochemical Solar Hydrogen Production

Patil

Mahadik

Chae

et al. 2023

ACS Appl. Mater. Interfaces

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Solar energy is the most promising, efficient, environmentally friendly energy source with the potential to meet global demand due to its non-polluting nature. Herein, a porous Zn1–x Cd x Se/ZnO nanorod (NR) heterojunction was synthesized by hydrothermal and low-temperature solvothermal methods. First, the ZnO NR was grown on a Zinc foil, and an inorganic–organic hybrid ZnSe(en)0.5 material was developed by the low-temperature solvothermal method. In this work, the ZnO NR acted as a base material and a building block for the growth of ZnSe(en)0.5. Moreover, after the solvothermal process, the reduced Se2– reacts with the ZnO NR and forms inorganic–organic hybrid ZnSe(en)0.5. After the selenization process, the obtained material shows a red brick color due to the absorbance of excessive Se metal particles during the solvothermal process. Furthermore, in order to enhance the photoelectrochemical properties, the Cd2+ ion exchange method was applied at various temperatures (140, 160, and 180 °C for 3 h) to produce a precursor material to a porous Zn1–x Cd x Se/ZnO NR nanostructure. The optimum Zn1–x Cd x Se/ZnO NR-160 photoanode showed a high photocurrent density of 7.8 mA·cm–2 at −0.5 V vs. Ag/AgCl with a hydrogen evolution rate of 199 μmol·cm–2/3 h. The improved photocurrent performance was attributed to effective light absorption and prolonged recombination lifetime.

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“…Figure 2 A illustrates the UV-Vis diffuse reflectance spectrum (DRS) of bare TiO 2 , CdIn 2 S 4 , TiO 2 /CdIn 2 S 4 and TiO 2 /CQDs/CdIn 2 S 4 photocatalysts. The tetragonal TiO 2 exhibited a typical absorption edges at 387 nm, situated in the absorption range of ultraviolet light [ 59 ]. Meanwhile, the absorption edge of CdIn 2 S 4 can be observed at 610 nm corresponding to the band gap energy of 2.03 eV [ 49 ].…”

Section: Resultsmentioning

confidence: 99%

Carbon Quantum Dots Bridged TiO2/CdIn2S4 toward Photocatalytic Upgrading of Polycyclic Aromatic Hydrocarbons to Benzaldehyde

et al. 2022

Molecules

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Conversion of hazardous compounds to value-added chemicals using clean energy possesses massive industrial interest. This applies especially to the hazardous compounds that are frequently released in daily life. In this work, a S-scheme photocatalyst is optimized by rational loading of carbon quantum dots (CQDs) during the synthetic process. As a bridge, the presence of CQDs between TiO2 and CdIn2S4 improves the electron extraction from TiO2 and supports the charge transport in S-scheme. Thanks to this, the TiO2/CQDs/CdIn2S4 presents outstanding photoactivity in converting the polycyclic aromatic hydrocarbons (PAHs) released by cigarette to value-added benzaldehyde. The optimized photocatalyst performs 87.79% conversion rate and 72.76% selectivity in 1 h reaction under a simulated solar source, as confirmed by FT-IR and GC-MS. A combination of experiments and theoretical calculations are conducted to demonstrate the role of CQDs in TiO2/CQDs/CdIn2S4 toward photocatalysis.

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Morphology control and phase transformation of ZIS/TiO2 into CdSe(en)0.5/CIS/TiO2 photoanode for enhanced solar hydrogen generation

Cited by 18 publications

References 55 publications

Hydrogen-Treated TiO₂ Nanorods Decorated with Bimetallic Pd–Co Nanoparticles for Photocatalytic Degradation of Organic Pollutants and Bacterial Inactivation

Hydrogen-Treated TiO₂ Nanorods Decorated with Bimetallic Pd–Co Nanoparticles for Photocatalytic Degradation of Organic Pollutants and Bacterial Inactivation

Porous Zn_1–xCd_xSe/ZnO Nanorod Photoanode Fabricated from ZnO Building Blocks Grown on Zn Foil for Photoelectrochemical Solar Hydrogen Production

Carbon Quantum Dots Bridged TiO2/CdIn2S4 toward Photocatalytic Upgrading of Polycyclic Aromatic Hydrocarbons to Benzaldehyde

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Morphology control and phase transformation of ZIS/TiO2 into CdSe(en)0.5/CIS/TiO2 photoanode for enhanced solar hydrogen generation

Cited by 18 publications

References 55 publications

Hydrogen-Treated TiO2 Nanorods Decorated with Bimetallic Pd–Co Nanoparticles for Photocatalytic Degradation of Organic Pollutants and Bacterial Inactivation

Hydrogen-Treated TiO2 Nanorods Decorated with Bimetallic Pd–Co Nanoparticles for Photocatalytic Degradation of Organic Pollutants and Bacterial Inactivation

Porous Zn1–xCdxSe/ZnO Nanorod Photoanode Fabricated from ZnO Building Blocks Grown on Zn Foil for Photoelectrochemical Solar Hydrogen Production

Carbon Quantum Dots Bridged TiO2/CdIn2S4 toward Photocatalytic Upgrading of Polycyclic Aromatic Hydrocarbons to Benzaldehyde

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Hydrogen-Treated TiO₂ Nanorods Decorated with Bimetallic Pd–Co Nanoparticles for Photocatalytic Degradation of Organic Pollutants and Bacterial Inactivation

Hydrogen-Treated TiO₂ Nanorods Decorated with Bimetallic Pd–Co Nanoparticles for Photocatalytic Degradation of Organic Pollutants and Bacterial Inactivation

Porous Zn_1–xCd_xSe/ZnO Nanorod Photoanode Fabricated from ZnO Building Blocks Grown on Zn Foil for Photoelectrochemical Solar Hydrogen Production