A stable, efficient and reusable CdS–SnO2 heterostructured photocatalyst for the mineralization of Acid Violet 7 dye

Ghugal, Sachin G.; Umare, Suresh S.; Sasikala, R.

doi:10.1016/j.apcata.2015.02.035

Cited by 52 publications

(10 citation statements)

References 38 publications

(38 reference statements)

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“…With respect to recombination of photogenerated charge carriers, this can be suppressed by enhancing the charge separation efficiency via formation of nanocomposites with semiconductors (e.g. TiO 2 /CdS 14, 15 , ZnO/CdS 16 , Bi 2 S 3 /CdS 17 , MoO 3 /CdS 18 , SnO 2 /CdS 19 or metal ion doping 10 , and this also improves the stability of CdS, which is otherwise prone to photocorrosion.…”

Section: Introductionmentioning

confidence: 99%

CdS aerogels as efficient photocatalysts for degradation of organic dyes under visible light irradiation

Korala

Germain

Chen

et al. 2017

Inorg. Chem. Front.

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Synthesis of efficient photocatalysts based on CdS nanomaterials for oxidative decomposition of organic effluents typically focuses on (a) enhancement of surface area of the catalysts and (b) promotion of the separation of photogenerated electron-hole pairs. CdS aerogel, which are synthesized by simple sol–gel assembly of discrete nanocrystals (NCs) into a porous network followed by supercritical drying, could provide higher surface area for photocatalytic reactions along with facile charge separation due to direct contact between NCs via covalent bonding. We evaluated the efficiency of CdS aerogel materials for degradation of organic dyes using methylene blue (MB) and methyl orange (MO) as test cases. CdS aerogel materials exhibited remarkable photocatalytic activity for dye degradation compared to typical, ligand-capped CdS NCs. The catalytic efficiency of CdS aerogels was further improved by decreasing the chain-length and extent of surface organics, leading to higher, and more hydrophilic, accessible surface area. The use of porous, chalcogenide-based solid state architectures for photocatalysis enables easy separation of catalyst while ensuring a high-interfacial surface area for analyte reactivity and visible light activation.

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Section: Introductionmentioning

confidence: 99%

CdS aerogels as efficient photocatalysts for degradation of organic dyes under visible light irradiation

Korala

Germain

Chen

et al. 2017

Inorg. Chem. Front.

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“…The favorable heterojunction between CdS and MoS 2 extended lifetime of the charge carriers [213,214]. The same type of mechanism was observed for CdS/SnO 2 photocatalyst where electrons shift from cadmium sulfides conduction band to the thin oxides band [199]. Consequently, the charge carriers in junction between semiconductors were effectively separated via one-step process.…”

Section: Photo-excitation Mechanisms Of Binary Compositesmentioning

confidence: 59%

“…In view of the internal field between semiconductors, in some composites used for photodegradation under visible light, only electron transfer exists without hole migration in the valence band (the process is named mechanism B, see Figure 2b) [199,213,214,218,219]. Xu et al [213] synthesized CdS/MoS 2 composite active under visible irradiation range.…”

Section: Photo-excitation Mechanisms Of Binary Compositesmentioning

confidence: 99%

Some Unitary, Binary, and Ternary Non-TiO2 Photocatalysts

Marchelek¹,

Diak²,

Kozak³

et al. 2016

Semiconductor Photocatalysis - Materials, Mechanisms and Applications

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Among all kinds of green earth and renewable energy projects underway, semiconductor photocatalysis has received wide interest because it provides an easy way to directly utilize the energy of either natural sunlight or artificial indoor illumination. TiO 2 , the most widely used photocatalyst, due to its wide band gap, can only be activated under UV irradiation, and thus, the development of novel semiconductor photocatalysts makes a significant advancement in photocatalytic functional materials. One of the effective strategies to overcome this shortcoming is photosensitizing these wide band gap semiconductors with narrow band gap semiconductors which have proper energy levels. This method can not only improve the photocatalytic activity, due to increasing visiblelight-harvesting efficiency, but also can decrease the recombination of the charge carriers, because the formation of n-n or n-p heterojunctions between the combined semiconductors can induce internal electric fields between them. In this regard, this review presents some unitary, binary, and ternary non-TiO 2 photocatalysts used for the degradation for organic pollutants and for water splitting.

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“…CdS with a direct bandgap energy value of 2.42 eV, suitable conduction bands, and good absorption coefficient (Yang et al 2013) belongs to the II-VI group. CdS has the adjustable shape and size-dependent electronic and optical properties, owing anisotropic shapes for various applications (Yong et al 2007) including optical materials, solar cells, optoelectronic devices, infrared light and lasers, and luminescence devices (Ghugal et al 2015;Ahmed et al 2016;Tak et al 2009;Zhu et al 2011). However, charge carrier recombination in CdS is quite rapid, limiting the photocatalytic performance and also exposing photocorrosion in oxygencontaining aqueous media during photocatalytic reaction (Zhang and Zhu 2010).…”

Section: Introductionmentioning

confidence: 99%

WO3 nanoplates decorated with polyaniline and CdS nanoparticles as a new photocatalyst for degradation of imidacloprid pesticide from water

Merci

Saljooqi

Shamspur

et al. 2021

Environ Sci Pollut Res

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This study focused on the photocatalytic degradation of imidacloprid (IM) in water as the model pesticides. The effective division of photogenerated charge carriers is important in the photocatalytic reactions. So, a new PANI/WO 3-CdS photocatalyst was synthesized by a simple method. The prepared PANI/WO 3-CdS nanocomposite was characterized using Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy compatible with energy dispersive spectroscopy (FESEM-EDS), and X-ray diffraction (XRD). Degradation of IM pesticide under visible light irradiation was carried out to investigate the photocatalytic efficiency of the prepared nanocomposite. The effect of operational parameters on the degradation performance of pesticides was studied by response surface methodology (RSM). The optimum conditions for photocatalytic degradation of IM (94.7%) were found to be 10 ppm of IM, 150 mg of PANI/WO 3-CdS, and pH = 3.0. The apparent rate constant of IM photodegradation over PANI/WO 3-CdS was 0.016 min −1. According to results, PANI/WO 3-CdS can serve as an efficient, and recyclable photocatalyst for imidacloprid degradation in an aqueous media.

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A stable, efficient and reusable CdS–SnO2 heterostructured photocatalyst for the mineralization of Acid Violet 7 dye

Cited by 52 publications

References 38 publications

CdS aerogels as efficient photocatalysts for degradation of organic dyes under visible light irradiation

CdS aerogels as efficient photocatalysts for degradation of organic dyes under visible light irradiation

Some Unitary, Binary, and Ternary Non-TiO2 Photocatalysts

WO3 nanoplates decorated with polyaniline and CdS nanoparticles as a new photocatalyst for degradation of imidacloprid pesticide from water

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