Hollow micro-spherical bismuth oxy-chloride for superior visible light induced dye-sensitized photocatalytic activity and its theoretical insight

Sarkar, Ratna; Das, Dimitra; Das, Bikram Kumar; Mitra, Anuradha; Das, Nirmalya Sankar; Sarkar, Subrata; Chattopadhyay, Kalyan Kumar

doi:10.1016/j.materresbull.2020.110778

Cited by 18 publications

(2 citation statements)

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“…In addition, the HRTEM (JEOL-JEM 2100 Plus) study was conducted. [19] Electrochemical Measurement: A three electrode system was used to analyze the Mott-Schottky plots produced by PGSTAT302N AUTOLAB. To prepare the Ni foam for measurement, diluted HCl solution followed by ethanol was used to clean the surface of the foam (cut into 1 cm 2 dimension).…”

Section: Conflict Of Interestmentioning

confidence: 99%

Sonochemically Synthesized Bismuth Oxyiodide Nanocrystal for Wastewater Remediation through Visible‐Light Photocatalysis

Sarkar,

Das,

Sarkar

et al. 2024

Macromolecular Symposia

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It has been demonstrated that bismuth oxyhalides [BiOX (X = Cl, Br, and I)] nano‐crystals can efficiently behave as photocatalysts both under visible light and UV light. Different types of dyes, phenols, etc. can be degraded by bismuth oxyhalides materials efficiently, for the purification of wastewater. The raw materials used in the synthesis of bismuth oxyiodide (BiOI) are pure Bi2O3, halide salt, and capping agent (poly‐vinyl‐pyrrolidone). A variety of characterization techniques are used to characterize the as‐synthesized samples, including X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV–Vis diffuse reflection spectroscopy (UV–Vis DRS), photoluminescence (PL), Mott–Schottky, field emission scanning electron microscopy (FESEM), energy dispersive X‐ray spectroscopy (EDX), and high resolution transmission electron microscopic (HRTEM), etc. A potential application in environmental remediation is achieved through 95.25% degradation of organic Rhodamine B (RhB) dye within 100 min using the synthesized materials under visible light irradiation.

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Section: Conflict Of Interestmentioning

confidence: 99%

Sonochemically Synthesized Bismuth Oxyiodide Nanocrystal for Wastewater Remediation through Visible‐Light Photocatalysis

Sarkar,

Das,

Sarkar

et al. 2024

Macromolecular Symposia

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“…Gas sensors based on semiconductor materials with two-dimensional (2D) structures have attracted great interest due to the customizable performance of gas sensors with broad specific surface area and a tunable band gap structure. BiOCl is one of the semiconductor materials with the two-dimensional structure; in addition to its tunable band gap and remarkable specific surface area, its low cost, nontoxicity, and human applicability make it a highly promising gas-sensitive material. − However, limited by weak gas adsorption sites and sluggish charge-transfer capability, their gas-sensing performance cannot be fully utilized; not only is the sensitivity low at room temperature but also the response and recovery kinetics are sluggish.…”

Section: Introductionmentioning

confidence: 99%

Constructing Adsorption Site-Enhanced Vo-BiOCl/rGO Heterostructures for Efficient Response to NO₂/NH₃ Gases at Room Temperature

Nie,

Zhong,

Yang

et al. 2024

ACS Appl. Mater. Interfaces

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Real-time detection of harmful gases at room temperature has become a serious problem in public health and environmental monitoring. Two-dimensional materials with semiconductor properties BiOCl is a promising gas-sensitive material due to its large specific surface area and adjustable band gap as well as outstanding safety characteristics. However, limited by the weak gas adsorption sites and sluggish charge-transfer ability, the performance of BiOCl could not be fully exploited. Oxygen vacancy (Vo) engineering can introduce lattice defects, thereby significantly increasing the local charge density and enhancing the adsorption of gases, which is an effective strategy to enhance the gas-sensing performance. In this work, we composite BiOCl with a vacancy (Vo-BiOCl) and reduced graphene oxide (rGO) to construct a Vo-BiOCl/rGO heterostructure with enhanced gas adsorption sites. Experimental and theoretical calculations show that Vo can enhance the adsorption of gases and the introduction of rGO forms a high-quality heterostructure with BiOCl, which can effectively reduce the band gap of BiOCl and promote electron transfer, thereby improving the sensitivity of the sensor. Benefiting from above, Vo-BiOCl/rGO achieves the ability to detect low concentrations of NO 2 /NH 3 at room temperature, with high sensitivity (55% at 1 ppm of NO 2 and −28% at 1 ppm of NH 3 ), fast response time (40 s at 1 ppm of NO 2 and 2 s at 1 ppm of NH 3 ), good stability (over 150 days), and fully recoverable gas sensitivity.

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Sustainable Solutions for Industrial Wastewater Remediation by KBiFe₂O₅ Under Visible‐Light Irradiation

Ghose,

Sarkar,

Chandra

et al. 2024

Macromolecular Symposia

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Industrial wastewater poses a serious threat to human health and the environment. The rising demand for an easy, efficient, environment‐friendly, and cost‐effective method for wastewater treatment has paved the way for the photocatalytic degradation of wastewater. Organic dyes, which comprise a major portion of organic pollutants in industrial wastewater, are highly toxic and carcinogenic. The hydrothermal method, being economical, easily available, and environmentally friendly, is used to prepare the time‐varying KBiFe2O5 samples. KBiFe2O5 is a lead‐free (nonhazardous), low‐bandgap brownmillerite‐structured crystalline material that can use a wide range of solar spectrum. Their phase purity is also confirmed by powder X‐ray diffraction (XRD), UV–Vis diffuse reflectance spectrophotometer (UV–Vis DRS) is done to confirm the bandgap value and Fourier transform infrared (FTIR) spectroscopy is performed to identify the chemical bonds in the material. Degrading textile organic effluent methylene blue (MB) dye under visible light and comparing its photodegradation performance are conducted to investigate the synthesized samples’ photocatalytic properties. The photocatalytic activity is relatively enhanced by adding H2O2 in a precise amount. So, the synthesized samples effectively demonstrate photocatalytic behavior, which has been used for wastewater remediation purposes.

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Hollow micro-spherical bismuth oxy-chloride for superior visible light induced dye-sensitized photocatalytic activity and its theoretical insight

Cited by 18 publications

References 50 publications

Sonochemically Synthesized Bismuth Oxyiodide Nanocrystal for Wastewater Remediation through Visible‐Light Photocatalysis

Sonochemically Synthesized Bismuth Oxyiodide Nanocrystal for Wastewater Remediation through Visible‐Light Photocatalysis

Constructing Adsorption Site-Enhanced Vo-BiOCl/rGO Heterostructures for Efficient Response to NO₂/NH₃ Gases at Room Temperature

Sustainable Solutions for Industrial Wastewater Remediation by KBiFe₂O₅ Under Visible‐Light Irradiation

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Hollow micro-spherical bismuth oxy-chloride for superior visible light induced dye-sensitized photocatalytic activity and its theoretical insight

Cited by 18 publications

References 50 publications

Sonochemically Synthesized Bismuth Oxyiodide Nanocrystal for Wastewater Remediation through Visible‐Light Photocatalysis

Sonochemically Synthesized Bismuth Oxyiodide Nanocrystal for Wastewater Remediation through Visible‐Light Photocatalysis

Constructing Adsorption Site-Enhanced Vo-BiOCl/rGO Heterostructures for Efficient Response to NO2/NH3 Gases at Room Temperature

Sustainable Solutions for Industrial Wastewater Remediation by KBiFe2O5 Under Visible‐Light Irradiation

Contact Info

Product

Resources

About

Constructing Adsorption Site-Enhanced Vo-BiOCl/rGO Heterostructures for Efficient Response to NO₂/NH₃ Gases at Room Temperature

Sustainable Solutions for Industrial Wastewater Remediation by KBiFe₂O₅ Under Visible‐Light Irradiation