Transforming Zn(O,S) from UV to visible-light-driven catalyst with improved hydrogen production rate: Effect of indium and heterojunction

Gultom, Noto Susanto; Abdullah, Hairus; Xie, Jhih-Cheng; Kuo, Dong‐Hau

doi:10.1016/j.jallcom.2021.159316

Cited by 10 publications

(6 citation statements)

References 43 publications

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“…To further determine the mesoporous type, the nitrogen absorption–desorption experiment was performed at a constant temperature. As presented in Figure a–c, the curves are quite similar and indicate that our 2.5Ag/2.5Zn and 2.5Ag/2.5Mg co-doped HAp belong to type IV mesopore materials . Furthermore, the pore size distribution in Figure d–f clearly indicates that 2.5Ag-HAp and 2.5Ag/2.5Zn co-doped HAp and 2.5Ag/2.5Mg co-doped HAp have pore sizes below 10 nm, which further confirms the mesopore properties of our HAp-based materials.…”

Section: Resultssupporting

confidence: 80%

Investigation of Antibacterial Activity and Cell Viability of Ag/Mg and Ag/Zn Co-doped Hydroxyapatite Derived from Natural Limestone

et al. 2021

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Improving the antibacterial activity to avoid infections and keeping the biocompatibility at a safe level of HAp-based materials is highly important for biomedical applications. In this work, we investigate the antibacterial activity of 2.5Ag/2.5Mg co-doped HAp and 2.5Ag/2.5Zn co-doped HAp toward Escherichia coli bacteria. Moreover, their biocompatibility for osteoblastic cells (MC3T3-E1 cells) was also evaluated. The physical properties were characterized with necessary characterization tools such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Brunauer–Emmett–Teller. Both 2.5Ag/2.5Mg and 2.5Ag/2.5Zn co-doped HAp consist of hydroxyapatite (HAp) and beta calcium triphosphate (β-TCP) phases. The antibacterial test reveals that 2.5Ag/2.5Mg co-doped HAp or 2.5Ag/2.5Zn co-doped HAp has an outstanding antibacterial activity with a killing rate of 99 ± 1%. More importantly, the cell viability for osteoblast cells with 2.5Ag/2.5Mg and 2.5Ag/2.5Zn co-doped HAp promotes the proliferation much more effectively than 2.5Ag-doped HAp or 5Ag-doped HAp.

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Section: Resultssupporting

confidence: 80%

Investigation of Antibacterial Activity and Cell Viability of Ag/Mg and Ag/Zn Co-doped Hydroxyapatite Derived from Natural Limestone

et al. 2021

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“…As shown in Figure b, both indium peaks of ZI-50-N10 at 444.6 and 452.2 eV with the symmetric shape are related to the orbital splitting of In 3+ 3d 5/2 and In 3+ 3d 3/2 , respectively . It is important to note that the peak shape of indium in ZI-50-N10 was different from that of Ni-free ZI-50, indicating the different phase formation. Similarly, the binding energy of indium for ZI-67-N10 also shifted by about 0.5 eV to a higher binding energy.…”

Section: Resultsmentioning

confidence: 92%

“…Our group has made persistent efforts to continually improve the performance of oxysulfide Zn(O,S)-based catalysts by applying several concepts such as doping, heterostructures, p–n nanodiodes, and cocatalysts. − Unfortunately, these materials were only active under UV irradiation because of their high band-gap energy value (>3 eV). We eventually successfully transformed Zn(O,S) to be a visible-light-active catalyst by doping it with different indium contents . However, the optimum hydrogen rate was only 340 μmol/g h for 50% indium doping (ZI-50 or ZnInOS/In(OH) 3 ), which was still relatively low.…”

Section: Introductionmentioning

confidence: 99%

Improved Hydrogen Production Rate of a Nickel-Doped Zinc Indium Oxysulfide Visible-Light Catalyst: Comparative Study of Stoichiometric and Nonstoichiometric Compounds

Gultom

Abdullah

Xie

et al. 2022

ACS Appl. Energy Mater.

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Photocatalytic hydrogen production has been considered as one of the effective methods to produce hydrogen as a green energy carrier in the future. This report systematically investigates the effect of nickel doping on the crystal structure, optical properties, and photocatalytic hydrogen production rate of the ZnInOS/ In(OH) 3 nanocomposite (denoted as ZI-50). It is found that nickel doping could transform the phase of ZI-50 from two phases of ZnInOS and In(OH) 3 into a single phase with a ZnIn 2 S 4 spinel structure. More importantly, all Ni-doped ZI-50 catalysts are nonstoichiometric and highly defective with a Zn(Zn,Ni,In) 2 (O,S) 4−x spinel structure. 10% nickel precursor-doped ZI-50 as the best catalyst can achieve the highest hydrogen evolution reaction rate of 1700 μmol/g•h, which is much higher than those of Ni-free ZI-50 (340 μmol/g•h) and stoichiometric ZnIn 2 S 4 (110 μmol/g•h). A kinetic mechanism for enhancing photocatalytic hydrogen evolution based upon the cationic antisite defects and anionic oxygen vacancy was proposed and explained.

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“…23 The characteristic Raman peaks of Ni 3 S 2 at 350 and 325 cm −1 shifted to a lower wavenumber after the addition of FeCl 2 , further indicating a change in the molecular structure due to the success of Fe doping. 24 Therefore, all samples upon FeCl 2 addition have formed Fe-doped Ni 3 S 2 /FeS 2 nanocomposites.…”

Section: X-ray Diffraction and Ramanmentioning

confidence: 93%

Single-Step Synthesis of Fe-Doped Ni₃S₂/FeS₂ Nanocomposites for Highly Efficient Oxygen Evolution Reaction

Gultom

Kuo

et al. 2022

ACS Appl. Mater. Interfaces

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Due to the sluggish kinetic reaction, the electrolytic oxygen evolution reaction (OER) is one of the obstacles in driving overall water splitting for green hydrogen production. In this study, we demonstrate a strategy to improve the OER performance of Ni 3 S 2 . The effect of addition of different FeCl 2 contents during the hydrothermal process on the OER activity is systematically evaluated. We found that all samples upon the addition of FeCl 2 produced Fe-doped Ni 3 S 2 and FeS 2 to form a nanocomposite. Their OER performances strongly depend on the amount of FeCl 2 , where the NSF-0.25 catalyst with 0.25 mmol FeCl 2 added during the hydrothermal synthesis shows the best OER performance. Its overpotential was 230 mV versus RHE and it achieves a high current density of 100 mA•cm −2 , which was much lower than that of pristine Ni 3 S 2 (320 mV) or RuO 2 (370 mV) as the benchmark OER catalyst. The postcharacterizations reveal that NSF-0.25 has gone through an in situ phase transformation into an Fe-NiOOH phase during the OER test. This study presents a simple method and a low-cost material to improve the OER performance with in situ formation of oxyhydroxide.

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Transforming Zn(O,S) from UV to visible-light-driven catalyst with improved hydrogen production rate: Effect of indium and heterojunction

Cited by 10 publications

References 43 publications

Investigation of Antibacterial Activity and Cell Viability of Ag/Mg and Ag/Zn Co-doped Hydroxyapatite Derived from Natural Limestone

Investigation of Antibacterial Activity and Cell Viability of Ag/Mg and Ag/Zn Co-doped Hydroxyapatite Derived from Natural Limestone

Improved Hydrogen Production Rate of a Nickel-Doped Zinc Indium Oxysulfide Visible-Light Catalyst: Comparative Study of Stoichiometric and Nonstoichiometric Compounds

Single-Step Synthesis of Fe-Doped Ni₃S₂/FeS₂ Nanocomposites for Highly Efficient Oxygen Evolution Reaction

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Transforming Zn(O,S) from UV to visible-light-driven catalyst with improved hydrogen production rate: Effect of indium and heterojunction

Cited by 10 publications

References 43 publications

Investigation of Antibacterial Activity and Cell Viability of Ag/Mg and Ag/Zn Co-doped Hydroxyapatite Derived from Natural Limestone

Investigation of Antibacterial Activity and Cell Viability of Ag/Mg and Ag/Zn Co-doped Hydroxyapatite Derived from Natural Limestone

Improved Hydrogen Production Rate of a Nickel-Doped Zinc Indium Oxysulfide Visible-Light Catalyst: Comparative Study of Stoichiometric and Nonstoichiometric Compounds

Single-Step Synthesis of Fe-Doped Ni3S2/FeS2 Nanocomposites for Highly Efficient Oxygen Evolution Reaction

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Single-Step Synthesis of Fe-Doped Ni₃S₂/FeS₂ Nanocomposites for Highly Efficient Oxygen Evolution Reaction