Facile synthesis of Au-ZnO plasmonic nanohybrids for highly efficient photocatalytic degradation of methylene blue

Kuriakose, Sini; Sahu, Kavita; Khan, Saif; Tripathi, Ambuj; Avasthi, D.K.; Mohapatra, Satyabrata

doi:10.1016/j.optmat.2016.11.035

Cited by 80 publications

(23 citation statements)

References 35 publications

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“…are increasingly gaining the limelight of today's research field as they have unique surface, optical, electrical, magnetic and others properties [1][2][3][4][5][6][7] that are limited to their nano regime but found to be almost insignificant in their bulk counterparts. Because of their exceptional properties in comparison to their difference [6] in bulk analogue, semiconductor photocatalyst materials are potentially used in various applications like solar cells [8], electrode materials [9,10], sensors [11,12], optical imagings [13], UV absorbers [14], photo-catalysis [15][16][17][18][19] etc. [2].…”

Section: Introductionmentioning

confidence: 99%

“…[2]. The photocatalyst materials can be employed either in their pristine form or after doping with a third element such as silver, copper, gold, iron, nitrogen or in the form of hybrid photocatalyst like core-shell structures to enhance the efficiency [6,[17][18][19][20][21][22][23][24]. However, even there are additional benefits provided by doping of metals to semiconductor oxides and making hybrid photocatalyst materials, these processes need cumbersome preparation steps, and hence it is mostly desirable to engineer and manipulate the desired properties in a minimal approach.…”

Section: Introductionmentioning

confidence: 99%

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Effect of induced defects on the properties of ZnO nanocrystals: surfactant role and spectroscopic analysis

2019

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Semiconductor photocatalysts are one of the major sought area of research due to their extensive use in the degradation of organic pollutants under UV-visible and solar light. Herein, we are reporting the synthesis of microscopic spindle shaped ZnO photocatalysts with different reducing agents such as sodium hydroxide, hydrazine hydride, sodium borohydride and lithium triethyl borohydride. These spindle shaped ZnO are synthesized by facile soft chemical approach by varying reducing agents with fixed molar ratio at 1:2 zinc precursor to reducing agents. These ZnOs were thoroughly characterised by various sophisticated characterization techniques such as XRD, FTIR, SEM, and HRTEM, Raman and ESR spectroscopies. Microscopic results show that these ZnO show similar fusiform morphologies with the variation in sizes and their distributions, and hence possess different defect related properties. The structural growth mechanism and defect related properties were explained on the basis of different reducing abilities of reducing agents (different reaction pH) and their nucleation with the aid of morphological analysis, and ESR analysis. Furthermore, the photocatalytic activity of these spindle shaped ZnO were evaluated against two cationic dyes (methylene blue dyes, Rhodamine B) under UV light. The photocatalytic results show that these spindle shaped ZnO are very effective for the photo-catalytic degradation of methylene blue and rhodamine B dye under the illumination of UV light.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of induced defects on the properties of ZnO nanocrystals: surfactant role and spectroscopic analysis

2019

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“…In the last decades, there has been significant advances in both theoretical and experimental investigations of surface plasmons, which led to the development of new simulation methods to calculate the optical properties of nanoplasmonic systems [5,10,11], and has delivered a relevant number of important applications [12][13][14]. Among them, is the detection of biomolecules, either by plasmonic sensing [15][16][17][18][19][20][21], plasmon-enhanced fluorescence [22] or surface-enhanced Raman scattering (SERS) [23][24][25], the enhancement of absorbed light in solar cells [26][27][28][29], biological imaging and phototherapy of tumors [30][31][32], as well as photocatalytic applications [33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Plasmonic Au-TiO2 Thin Films on a Transparent Polymer Substrate

et al. 2020

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In this work, plasmonic thin films composed of Au nanoparticles embedded in a TiO2 matrix were prepared in a transparent polymer substrate of poly(dimethylsiloxane) (PDMS). The thin films were deposited by reactive DC magnetron sputtering, and then subjected to heat treatment up to 150 °C in order to promote the growth of the Au nanoparticles throughout the TiO2 matrix. The transmittance spectrum of the thin films was monitored in situ during the heat treatment, and the minimum time required to have a defined localized surface plasmon resonance (LSPR) band was about 10 min. The average size of Au nanoparticles was estimated to be about 21 nm—the majority of them are sized in the range 10–40 nm, but also extend to larger sizes, with irregular shapes. The refractive index sensitivity of the films was estimated by using two test fluids (H2O and DMSO), and the average value reached in the assays was 37.3 ± 1.5 nm/RIU, resulting from an average shift of 5.4 ± 0.2 nm. The results show that it is possible to produce sensitive plasmonic Au-TiO2 thin films in transparent polymer substrates such as PDMS, the base material to develop microfluidic channels to be incorporated in LSPR sensing systems.

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“…However, the photocatalytic performance of ZnO is limited because its band gap is wide and e − and h + are easy to recombine. The doping of different metal ions in ZnO materials can effectively improve photocatalytic performance . Mohapatra et al reported the synthesis of Cu‐doped ZnO nanostructures by a facile wet chemical method.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity of ZnO Toward the Degradation of Methylene Blue Dye: Effects of Fe³⁺ and Sn⁴⁺ Doping

Luo

et al. 2019

Physica Status Solidi (a)

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ZnO, Fe 0.01 ZnO, Sn 0.05 ZnO, and Fe 0.01 Sn 0.01 ZnO photocatalysts are prepared by a simple low-temperature solution method using Zn(NO 3 ) 2 , Fe(NO 3 ) 3 , SnCl 4 , and NaOH as raw materials. X-ray diffraction, field-emission scanning electron microscopy, high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, Brunauer-Emmett-Teller surface area analysis, X-ray photoelectron spectroscopy, ultraviolet-visible diffusion spectroscopy, and photoluminescence spectroscopy are performed to characterize the products. All doped ZnO samples exhibit enhanced photocatalytic activity compared with undoped ZnO toward methylene blue (MB) degradation. In particular, Sn 0.05 ZnO shows excellent performance among the doped samples. The degradation rate of MB by Sn 0.05 ZnO reaches 99.61% after 120 min of illumination, which is approximately 2.2 times as high as that by undoped ZnO (45.88%). A comparison of the photocatalytic activity of the samples reveals the effects of Fe 3þ and Sn 4þ doping on the photocatalytic performance of ZnO on the basis of the following aspects: formation of impurity level, particle size, and pore structure of catalyst, microstructural changes in the crystal, and action of doped ions.

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Facile synthesis of Au-ZnO plasmonic nanohybrids for highly efficient photocatalytic degradation of methylene blue

Cited by 80 publications

References 35 publications

Effect of induced defects on the properties of ZnO nanocrystals: surfactant role and spectroscopic analysis

Effect of induced defects on the properties of ZnO nanocrystals: surfactant role and spectroscopic analysis

Preparation of Plasmonic Au-TiO2 Thin Films on a Transparent Polymer Substrate

Enhanced Photocatalytic Activity of ZnO Toward the Degradation of Methylene Blue Dye: Effects of Fe³⁺ and Sn⁴⁺ Doping

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Facile synthesis of Au-ZnO plasmonic nanohybrids for highly efficient photocatalytic degradation of methylene blue

Cited by 80 publications

References 35 publications

Effect of induced defects on the properties of ZnO nanocrystals: surfactant role and spectroscopic analysis

Effect of induced defects on the properties of ZnO nanocrystals: surfactant role and spectroscopic analysis

Preparation of Plasmonic Au-TiO2 Thin Films on a Transparent Polymer Substrate

Enhanced Photocatalytic Activity of ZnO Toward the Degradation of Methylene Blue Dye: Effects of Fe3+ and Sn4+ Doping

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Enhanced Photocatalytic Activity of ZnO Toward the Degradation of Methylene Blue Dye: Effects of Fe³⁺ and Sn⁴⁺ Doping