Wide band gap p-type nanocrystalline CuBO2 as a novel UV photocatalyst

Santra, Saswati; Das, Nirmalya Sankar; Chattopadhyay, Kalyan Kumar

doi:10.1016/j.materresbull.2013.03.034

Cited by 28 publications

(24 citation statements)

References 47 publications

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“…In this paper, a possible mechanism of photocatalytic activity of this material is also described. In our previous paper, highly efficient dye degradation property of CuBO 2 nanoparticle has already been reported [20]. In that case, the nanoparticles having very high surface area showed excellent photocatalytic performance.…”

Section: Introductionmentioning

confidence: 83%

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$$\hbox {CuBO}_{2}$$ CuBO 2 nanonetwork: a novel and significant candidate for photocatalytic dye degradation

Santra

Das

Das³

et al. 2018

Bull Mater Sci

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CuBO 2 is a novel material in the research field of transparent conducting oxide. In this study, CuBO 2 nanostructures have been synthesized via sol-gel method. The phase formation is confirmed using an X-ray diffractometer. Detailed morphological analysis is performed by field emission scanning electron microscopy and transmission electron microscopy. A novel uniform nanonetwork-like structure is obtained and its band gap is found to be 4.24 eV. In ultraviolet light irradiation, this as-synthesized sample shows efficient photocatalytic activity for degradation of organic dye Rhodamine B. The degradation efficiency and the rate constant were calculated as ∼70% and 1.32 × 10 −3 min −1 , respectively. This nanonetwork-like structure can be a potential candidate as the base material to attach various metals and metal oxide nanostructures to get highly efficient future photocatalysts. As a result, this study opens up a new gateway to fabricate novel environment-friendly nanocatalysts with high performance.

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Section: Introductionmentioning

confidence: 83%

“…As a result, in UV light irradiation, RhB is decomposed in the presence of CuBO 2 nanocatalyst. The following equations show the consecutive steps of the proposed degradation mechanism [20,32]: The photocatalytic mechanism is depicted in scheme 1.…”

Section: Probable Explanation For Catalytic Activitymentioning

confidence: 99%

$$\hbox {CuBO}_{2}$$ CuBO 2 nanonetwork: a novel and significant candidate for photocatalytic dye degradation

Santra

Das

Das³

et al. 2018

Bull Mater Sci

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“…However, it was noted that an indirect band gap at 2.2 eV was observed, and transmittance dropped greatly below the 550-nm wavelength. Later studies have been carried out to prepare nanocrystalline or microstructure CuBO 2 via chemical solution methods, although the performance in terms of the electrical conductivity and optical transmittance is not comparable to the CuCrO 2 films, as discussed before [150][151][152]. Another popular delafossite under intense research investigation is CuGaO 2 , which was firstly prepared by Yanagi et al in 2000 [33].…”

Section: Delafossitesmentioning

confidence: 99%

Transparent p-Type Semiconductors: Copper-Based Oxides and Oxychalcogenides

2019

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While p-type transparent conducting materials (TCMs) are crucial for many optoelectronic applications, their performance is still not satisfactory. This has impeded the development of many devices such as photovoltaics, sensors, and transparent electronics. Among the various p-type TCMs proposed so far, Cu-based oxides and oxychalcogenides have demonstrated promising results in terms of their optical and electrical properties. Hence, they are the focus of this current review. Their basic material properties, including their crystal structures, conduction mechanisms, and electronic structures will be covered, as well as their device applications. Also, the development of performance enhancement strategies including doping/co-doping, annealing, and other innovative ways to improve conductivity will be discussed in detail.

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“…A potential photocatalyst should have high quantum-efficiency, be chemically stable in an aqueous environment, be durable, have a simple synthetic process, and be easy for mass production. Oxide families have attracted particular attention thanks to their chemical stability in electrolytes [18][19][20][21][22][23][24][25][26]. However, mostly they are transparent to the solar spectrum and consequently of little practical use.…”

Section: Motivation and Possible Applicationmentioning

confidence: 99%

“…However, mostly they are transparent to the solar spectrum and consequently of little practical use. Delafossite family (AMO2) has been one of the candidates, and a lot of studies have been done on them in recent years because of their outstanding longevity, elements abundance, much lower cost, and better absorbance in the solar spectrum range [21][22][23][24][26][27][28][29][30][31][32][33]. However, to date, a limited number of delafossite have been reported capable of carrying out photoelectrocatalysis, including CuAlO2, CuLaO2, CuCrO2, CuYO2, CuFeO2, and CuRhO2 [31].…”

Section: Motivation and Possible Applicationmentioning

confidence: 99%

Experimental and Computational Exploration of the Dilute Magnetic Delafossite CuAl1-xFexO2 Alloys

Aziziha¹

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Experimental and Computational Exploration of the Dilute Magnetic DelafossiteCuAl1-xFexO2 Alloys Mina AzizihaCuAlO2 is among several ternary delafossites, which is a rare p-type semiconductor with potential applications as a transparent conductive oxide, photocatalyst, and spintronics when doped with transition metal ions. Reported in this thesis are results from our investigations of CuAl1-xFexO2 (x = 0 to1) with a focus on the x-dependence of structural, magnetic, vibrational, optical properties, and the role of defects and impurities. Samples are prepared by solid-state reactions.We performed a complete study of magnetic properties to investigate the possibility of room temperature ferromagnetic alloys, which are used in transparent ferromagnet applications, suggested by a computational study. Analysis of magnetization (M) vs. temperature (T, from 2 to 300 K) data by Curie-Weiss law confirms Fe 3+ as the electronic state of Fe; this analysis also yields a negative θ characteristic of an antiferromagnetic Fe 3+ -Fe 3+ exchange coupling and magnitudes of x in good agreement with the nominal values. The isothermal M vs. H (up to H= 90 kOe) data analyzed by the modified Brillouin function support the results obtained from the M vs. T analysis. High-resolution M-H loop measurements at 300 K and 10 K show negligible coercivity (HC) at 10 K but HC ~ 100 Oe at 300K. The results suggest that the room temperature ferromagnetism can originate from hematite impurity, but not for CuAl1-xFexO2 alloys.

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Wide band gap p-type nanocrystalline CuBO2 as a novel UV photocatalyst

Cited by 28 publications

References 47 publications

$$\hbox {CuBO}_{2}$$ CuBO 2 nanonetwork: a novel and significant candidate for photocatalytic dye degradation

$$\hbox {CuBO}_{2}$$ CuBO 2 nanonetwork: a novel and significant candidate for photocatalytic dye degradation

Transparent p-Type Semiconductors: Copper-Based Oxides and Oxychalcogenides

Experimental and Computational Exploration of the Dilute Magnetic Delafossite CuAl1-xFexO2 Alloys

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