Plasmon-mediated, highly enhanced photocatalytic degradation of industrial textile dyes using hybrid ZnO@Ag core–shell nanorods

Dinesh, V.P.; Pullithadathil, Biji; Ashok, Anuradha; Dhara, Sandip; Kamruddin, M.; Tyagi, A.K.; Raj, Baldev

doi:10.1039/c4ra09405k

Cited by 138 publications

(44 citation statements)

References 44 publications

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“…Thus, X‐ray diffraction (XRD) measurements and analysis were performed, which confirmed the formation of high‐quality wurtzite ZnO (see Figure b) . In fact, the θ–2θ scan revealed two main peaks at 34.26° and 31.48°, corresponding to the (002) and (100) planes, respectively; this also confirmed the purity of the deposited oxide and matches well to the literature (JCPDS card no 36‐1451). In addition, the crystalline size ( D ) corresponding to the dominating (002) peak was calculated using the Scherrer equation: D = 0.94λ /( Bcos θ), where B is the full‐width at half‐maximum (FWHM) in radians, λ is wavelength in nm, and θ is the Braggs' angle in degrees.…”

Section: Resultssupporting

confidence: 82%

Translucent Photodetector with Blended Nanowires–Metal Oxide Transparent Selective Electrode Utilizing Photovoltaic and Pyro‐Phototronic Coupling Effect

Abbas

Kumar

Kim

et al. 2019

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ZnO is a potential candidate for photodetection utilizing the pyroelectric effect. Here, a self‐biased and translucent photodetector with the configuration of Cu4O3/ZnO/FTO/Glass is designed and fabricated. In addition, the pyroelectric effect is effectively harvested using indium tin oxide (ITO), silver nanowires (AgNWs), and a blend of AgNWs‐coated ITO as the transparent selective contact electrode. The improved rise times are observed from 1400 µs (bare condition; without the selective electrode) to 69, 60, 7 µs, and fall times from 720 µs (bare condition) to 80, 70, 10 µs for corresponding ITO, AgNWs, and AgNWs‐coated ITO contact electrodes, respectively. Similarly, the responsivity and detectivity are enhanced by about 4.39 × 107 and 5.27 × 105%, respectively. An energy band diagram is proposed to explain the underlying working mechanism based on the workfunction of the ITO (4.7 eV) and AgNWs (4.57 eV) as measured by Kelvin probe force microscopy, which confirms the formation of type‐II band alignment resulting in the efficient transport of photogenerated charge carriers. The functional use of the transparent selective contact electrode can effectively harness the pyro‐phototronic effect for next‐generation transparent and flexible optoelectronic applications.

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Section: Resultssupporting

confidence: 82%

Translucent Photodetector with Blended Nanowires–Metal Oxide Transparent Selective Electrode Utilizing Photovoltaic and Pyro‐Phototronic Coupling Effect

Abbas

Kumar

Kim

et al. 2019

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“…There were no noticeable crystalline defects in the ZnO nanorod found in related to the carbon adsorbed on the surface during the exposure of the sample to the ambient atmosphere. These values are in good agreement with the reported ZnO nanorods [46][47]. Fig.…”

Section: Characterizationsupporting

confidence: 92%

Synthesis of ZnO nanorods on a flexible Phynox alloy substrate: influence of growth temperature on their properties

et al. 2015

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A novel flexible alloy substrate (Phynox, 50 µm thick) is used for the synthesis of Zinc Oxide (ZnO) nanorods by low-temperature solution growth method. The growth of ZnO nanorods were observed at low temperature range of 60-90 °C for the growth duration of 4 hours. As-synthesized nanorods were characterized by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) for their morphology, crystallanity, microstructure and composition. The as-grown ZnO nanorods were observed to be relatively vertical to the substrate. However, the morphology of ZnO nanorods in terms of their length, diameter and aspect ratio is found to vary with the growth temperatures. The morphological variations are mainly due to the effects of varied relative growth rates with growth temperature. The growth temperature influenced ZnO nanorods are also used for analyzing their wetting (either hydrophobic or hydrophilic) property. After carrying out multiple wetting behaviour analysis, it has been found that the as-synthesized ZnO nanorods are hydrophobic in nature. These ZnO nanorods have the potential application possibilities in self cleaning devices, sensors & actuators as well as energy harvesters like nanogenerators.Zinc Oxide (ZnO) is one of the most promising potential materials due to its remarkable properties such as wide band-gap (3.37eV), large exciton binding energy (60 meV), excellent chemical & thermal stability, transparency and biocompatibility. Due to the possible utilization of the above mentioned properties in various fields like electronics, optoelectronics, electrochemical and electromechanical, the ZnO has become more popular and drawing increasing interest in the area of nanotechnology [1][2][3][4]. ZnO is very flexible functional material exhibiting wide structural morphologies, such as nanocombs [5], nanorings [6], nanohelixes/nanosprings [7], nanobelts [8], nanowires/nanorods [9, 10], nanotubes [11], nanocages [12] and nanosheets [13]. Among these, one dimensional (1D) ZnO nanorords/nanowires have been extensively studied in the recent past due to their multifunctional device applications in the areas of ultraviolet (UV) lasers [14-15], light emitting diodes [16], field emission devices [17-18], solar cells [19-20], surface acoustic wave devices [21], piezoelectric sensors & actuators [22-23] and nanogenerators [2-3,24]. The 1D ZnO nanorods can be synthesized by various methods such as physical vapour deposition (PVD) [8], chemical vapour deposition (CVD) [25], metalorganic chemical vapour deposition (MOCVD) [26], molecular beam epitaxy (MBE) [27], pulsed laser deposition (PLD) [28], hydrothermal synthesis [3,24,29]and electrochemical deposition [30]. Among all these methods, solution growth assisted hydrothermal synthesis is most favourable due to its flexibility to carry out the synthesis process on variety of substrates (both conducting and non-conducting) at low temperatures (<100°C). Moreover, this process is ...

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“…Whereas, in ZnO/Au heterojunction nanofibers, the integrated peak intensity was reduced significantly showing appreciable peak shift (Table .) than the pristine ZnO nanofibers, due to the electron transfer between ZnO and Au at the heterojunctions . Heterojunction nanofibers consist of Au nanograins along with the ZnO grains leading to the interfacial charge transfer process aided by highly defected sites.…”

Section: Resultsmentioning

confidence: 99%

Novel Electro‐Spun Nanograined ZnO/Au Heterojunction Nanofibers and Their Ultrasensitive NO₂ Gas Sensing Properties

2018

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Novel nanograined ZnO/Au heterostructured nanofibers have been successfully prepared using two‐step process via electrospinning method followed by thermal oxidation and their surface bound NO2 sensing properties were analyzed. The ZnO/Au heterojunction nanofibers exhibited typical nanograined structure with 1D morphology consisting of two distinct lattice fringes with d spacing values of 0.14 ± 0.5 nm and 0.28 ± 0.5 nm corresponding to Au [111] and ZnO [101] respectively. Defects and surface bound properties were examined using Room temperature Photoluminescence (RTPL) spectroscopy, X‐ray photo‐electron spectroscopy (XPS) and X‐ray diffraction analysis. The existence of Au, Zn and O in 4 f, 2p and 1 s states and chemisorbed oxygen species on the surface were structurally confirmed after the careful evaluation and proves the purity of synthesis. NO2 gas sensor property analysis of ZnO/Au heterojunction nanofibers showed an extraordinary sensor response (S=98) and selectivity at a lower operating temperature of 350°C than pristine ZnO nanofibers (450 °C). The enhanced sensing behavior of the heterostructured nanofibers are ascribed to the synergetic effect of Au nanoclusters at the interface which act as spill‐over zone favoring physisorption and defect mediated sensing process.

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Plasmon-mediated, highly enhanced photocatalytic degradation of industrial textile dyes using hybrid ZnO@Ag core–shell nanorods

Abstract: Hybrid ZnO@Ag core-shell nanorods were synthesized using a novel seed mediated, two-step process and their plasmon-mediated, enhanced photocatalytic property was used for degradation of industrial textile dyes and effluents.

Cited by 138 publications

References 44 publications

Translucent Photodetector with Blended Nanowires–Metal Oxide Transparent Selective Electrode Utilizing Photovoltaic and Pyro‐Phototronic Coupling Effect

Translucent Photodetector with Blended Nanowires–Metal Oxide Transparent Selective Electrode Utilizing Photovoltaic and Pyro‐Phototronic Coupling Effect

Synthesis of ZnO nanorods on a flexible Phynox alloy substrate: influence of growth temperature on their properties

Novel Electro‐Spun Nanograined ZnO/Au Heterojunction Nanofibers and Their Ultrasensitive NO₂ Gas Sensing Properties

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Plasmon-mediated, highly enhanced photocatalytic degradation of industrial textile dyes using hybrid ZnO@Ag core–shell nanorods

Abstract: Hybrid ZnO@Ag core-shell nanorods were synthesized using a novel seed mediated, two-step process and their plasmon-mediated, enhanced photocatalytic property was used for degradation of industrial textile dyes and effluents.

Cited by 138 publications

References 44 publications

Translucent Photodetector with Blended Nanowires–Metal Oxide Transparent Selective Electrode Utilizing Photovoltaic and Pyro‐Phototronic Coupling Effect

Translucent Photodetector with Blended Nanowires–Metal Oxide Transparent Selective Electrode Utilizing Photovoltaic and Pyro‐Phototronic Coupling Effect

Synthesis of ZnO nanorods on a flexible Phynox alloy substrate: influence of growth temperature on their properties

Novel Electro‐Spun Nanograined ZnO/Au Heterojunction Nanofibers and Their Ultrasensitive NO2 Gas Sensing Properties

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Product

Resources

About

Novel Electro‐Spun Nanograined ZnO/Au Heterojunction Nanofibers and Their Ultrasensitive NO₂ Gas Sensing Properties