Raman, DSC, ESR and optical properties of lithium cadmium zinc tellurite glasses

Sreenivasulu, V. Bharath; Upender, G.; Swapna,; Priya, V. Vamsi; Mouli, V. Chandra; Prasad, M.

doi:10.1016/j.physb.2014.06.039

Cited by 38 publications

(8 citation statements)

References 43 publications

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“…The XRD and Raman spectra in Figure S6 (Supporting Information) show that there will form CdO bonds after long time cation exchange reaction (5 h), suggesting that there is a tendency to form CdO bonds in ZnIn 2 S 4 /CdS composite. [ 30 ] Moreover, according to the DFT calculation (Figure S7, Supporting Information), when O atoms replace S (around In atoms) at the interface between ZnIn 2 S 4 and CdS, the optimum stable structure exists, and there forms stable InOCd bond. In order to eliminate the Zn defects produced by the cation exchange reaction, ALD ZnO overlayer is introduced.…”

Section: Resultsmentioning

confidence: 99%

Interfacial Chemical Bond‐Modulated Z‐Scheme Charge Transfer for Efficient Photoelectrochemical Water Splitting

Tian

Meng

et al. 2021

Advanced Energy Materials

141

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The Z‐scheme heterojunction has great potential in photoelectrochemical (PEC) water splitting due to its unique charge‐carrier migration pathway, superior carrier separation efficiency, and high redox capacity, but how to regulate the Z‐scheme charge transfer at the nanometric interface of heterostructures still remains a big challenge. Herein, InOCd bond is rationally introduced at the interface between ZnIn2S4 nanosheets and CdS nanoparticles through a facile cation exchange reaction, which successfully converts the previously reported type II band structure to a direct Z‐scheme heterojunction (ZnIn2S4/CdS) as confirmed by various characterizations. Density functional theory calculation reveals that the InOCd interfacial chemical bond significantly uplifts the Fermi level of ZnIn2S4 and CdS, inverts the interfacial band bending direction, thus resulting in the formation of Z‐scheme heterojunction. Moreover, an amorphous ZnO overlayer is deposited to eliminate the surface defects and accelerate the surface reaction kinetics. Benefiting from the superior charge separation efficiency and high redox ability originating from the Z‐scheme structure, the optimum ZnIn2S4/CdS/ZnO photoanode exhibits a dramatically enhanced PEC performance with low onset potential (−0.03 V vs reversible hydrogen electrode, VRHE) and large photocurrent of 3.48 mA cm−2 at 1.23 VRHE, which is about 21.75 times that of pristine ZnIn2S4.

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Section: Resultsmentioning

confidence: 99%

Interfacial Chemical Bond‐Modulated Z‐Scheme Charge Transfer for Efficient Photoelectrochemical Water Splitting

Tian

Meng

et al. 2021

Advanced Energy Materials

141

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“…This makes them promising materials for photonic applications such as lasers, optical fiber amplifiers, non-linear optical devices, and so on [1][2][3][4][5][6]. A pure TeO 2 does not form a glass easily and needs glass network oxides, modifiers and intermediates like BaO, ZnO, CdO, Bi 2 O 3 etc.…”

Section: Introductionmentioning

confidence: 99%

“…A pure TeO 2 does not form a glass easily and needs glass network oxides, modifiers and intermediates like BaO, ZnO, CdO, Bi 2 O 3 etc. [1][2][3][4][5][6]. The metal oxides such as ZnO, PbO and Bi 2 O 3 etc are well known conditional glass modifiers.…”

Section: Introductionmentioning

confidence: 99%

Structural, thermal and optical properties of TeO2–ZnO–CdO–BaO glasses doped with VO2+

Sreenivasulu

Upender

Mouli

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…For TNBV1 glass system, bands are observed at 468 cm −1 , 661 cm −1 , 787 cm −1 , 930 cm −1 , and 1213 cm −1 . The band at 468 cm −1 is attributed to symmetrical stretching or bending vibrations of the Te O Te linkages, which are formed by corner sharing of (TeO 4 ), (TeO 3+1 ) and (TeO 3 ) units; this band is also assigned to the bending vibrations of O B O bonds [13][14][15]. The intense band at 661 cm −1 observed is due…”

Section: Fourier Transform Infra-red Spectra (Ftir)mentioning

confidence: 96%

Raman, FTIR, thermal and optical properties of TeO₂-Nb₂O₅-B₂O₃-V₂O₅ quaternary glass system

Swapna

Upender

Prasad

2017

Journal of Taibah University for Science

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A series of quaternary glass systems with the composition 79TeO 2-(20−x)Nb 2 O 5-xB 2 O 3-1V 2 O 5 was prepared using the melt quench technique. Such studies as optical absorption, Raman, FTIR spectroscopy, EPR and DSC were carried out on the glass system. The physical properties, such as density (ρ) and molar volume (V M), were determined. The Urbach energy (E), optical band gap (E opt), optical basicity (Λ), refractive index (n) and electron polarizability (α) of the glasses were determined from optical absorption data. Spin-Hamiltonian parameters of VO 2+ ions were calculated from the EPR data. With the gradual substitution of B 2 O 3 at the expense of Nb 2 O 5 , the density and optical band gap of the glasses decreased, and the electronic polarizability increased. EPR spectra revealed that VO 2+ occupies an octahedral site with tetrahedral compression. Spin-Hamiltonian parameters g || and g ⊥ increased as B 2 O 3 content increased in the glass. The glass transition temperature (T g) also decreased as the B 2 O 3 content in the glass increased.

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Raman, DSC, ESR and optical properties of lithium cadmium zinc tellurite glasses

Cited by 38 publications

References 43 publications

Interfacial Chemical Bond‐Modulated Z‐Scheme Charge Transfer for Efficient Photoelectrochemical Water Splitting

Interfacial Chemical Bond‐Modulated Z‐Scheme Charge Transfer for Efficient Photoelectrochemical Water Splitting

Structural, thermal and optical properties of TeO2–ZnO–CdO–BaO glasses doped with VO2+

Raman, FTIR, thermal and optical properties of TeO₂-Nb₂O₅-B₂O₃-V₂O₅ quaternary glass system

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Raman, DSC, ESR and optical properties of lithium cadmium zinc tellurite glasses

Cited by 38 publications

References 43 publications

Interfacial Chemical Bond‐Modulated Z‐Scheme Charge Transfer for Efficient Photoelectrochemical Water Splitting

Interfacial Chemical Bond‐Modulated Z‐Scheme Charge Transfer for Efficient Photoelectrochemical Water Splitting

Structural, thermal and optical properties of TeO2–ZnO–CdO–BaO glasses doped with VO2+

Raman, FTIR, thermal and optical properties of TeO2-Nb2O5-B2O3-V2O5 quaternary glass system

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Raman, FTIR, thermal and optical properties of TeO₂-Nb₂O₅-B₂O₃-V₂O₅ quaternary glass system