Microwave-assisted fabrication of g-C3N4 nanosheets sustained Bi2S3 heterojunction composites for the catalytic reduction of 4-nitrophenol. Issue 6 (8th March 2021)
- Record Type:
- Journal Article
- Title:
- Microwave-assisted fabrication of g-C3N4 nanosheets sustained Bi2S3 heterojunction composites for the catalytic reduction of 4-nitrophenol. Issue 6 (8th March 2021)
- Main Title:
- Microwave-assisted fabrication of g-C3N4 nanosheets sustained Bi2S3 heterojunction composites for the catalytic reduction of 4-nitrophenol
- Authors:
- Ayodhya, Dasari
Veerabhadram, Guttena - Abstract:
- ABSTRACT: In this work, we report a stable g-C3 N4, Bi2 S3, and g-C3 N4 /Bi2 S3 composite catalysts were prepared via a facile one-pot microwave-assisted method and characterized. The orthorhombic phase and nearly spherical shape of the particles with an average diameter of 5–25 nm of g-C3 N4 /Bi2 S3 composite were obtained from XRD and TEM. The composite also exhibits a high surface area (32.15 m 2 /g), which may provide convenient transportation and diffusion for substrate molecule. The optical studies were displayed the g-C3 N4 /Bi2 S3 composite has a sharp absorption band in the visible region, higher charge separation, and reduced recombination rate. These results show that the Bi2 S3 NPs have good crystallinity and are uniformly deposited on the surface of the g-C3 N4 sheet. The catalytic performance of the g-C3 N4 /Bi2 S3 composite for the reduction of 4-NP to 4-AP was exhibited approximately 100%, which is 1.48 and 2.34 times higher than the Bi2 S3 and g-C3 N4 catalysts, respectively. The pseudo-first-order rate constant was estimated as 1.648 × 10 −2 min −1 for the reduction of 4-NP using g-C3 N4 /Bi2 S3 composite in 1 h reaction time. The effect of catalyst dosage (0–30 mg) was also investigated for the reduction of 4-NP using g-C3 N4 /Bi2 S3 composite catalyst. Moreover, the reusability of the g-C3 N4 /Bi2 S3 composite was exhibited a better reduction of the 4-NP even after 5 cycles and it was found that 8% reduction in the initial reduction rate. The obtainedABSTRACT: In this work, we report a stable g-C3 N4, Bi2 S3, and g-C3 N4 /Bi2 S3 composite catalysts were prepared via a facile one-pot microwave-assisted method and characterized. The orthorhombic phase and nearly spherical shape of the particles with an average diameter of 5–25 nm of g-C3 N4 /Bi2 S3 composite were obtained from XRD and TEM. The composite also exhibits a high surface area (32.15 m 2 /g), which may provide convenient transportation and diffusion for substrate molecule. The optical studies were displayed the g-C3 N4 /Bi2 S3 composite has a sharp absorption band in the visible region, higher charge separation, and reduced recombination rate. These results show that the Bi2 S3 NPs have good crystallinity and are uniformly deposited on the surface of the g-C3 N4 sheet. The catalytic performance of the g-C3 N4 /Bi2 S3 composite for the reduction of 4-NP to 4-AP was exhibited approximately 100%, which is 1.48 and 2.34 times higher than the Bi2 S3 and g-C3 N4 catalysts, respectively. The pseudo-first-order rate constant was estimated as 1.648 × 10 −2 min −1 for the reduction of 4-NP using g-C3 N4 /Bi2 S3 composite in 1 h reaction time. The effect of catalyst dosage (0–30 mg) was also investigated for the reduction of 4-NP using g-C3 N4 /Bi2 S3 composite catalyst. Moreover, the reusability of the g-C3 N4 /Bi2 S3 composite was exhibited a better reduction of the 4-NP even after 5 cycles and it was found that 8% reduction in the initial reduction rate. The obtained results from this study show that g-C3 N4 /Bi2 S3 composite has the potential efficiency and stability to make it an ideal catalyst for the reduction of toxic effluents and wastewater treatment. GRAPHICAL ABSTRACT: UF0001 … (more)
- Is Part Of:
- Environmental technology. Volume 42:Issue 6(2021)
- Journal:
- Environmental technology
- Issue:
- Volume 42:Issue 6(2021)
- Issue Display:
- Volume 42, Issue 6 (2021)
- Year:
- 2021
- Volume:
- 42
- Issue:
- 6
- Issue Sort Value:
- 2021-0042-0006-0000
- Page Start:
- 826
- Page End:
- 841
- Publication Date:
- 2021-03-08
- Subjects:
- G-C3N4/Bi2S3 nanocomposites -- effect of catalyst dosage -- catalyst stability -- rate of reaction -- environmental applications
Environmental engineering -- Periodicals
Environmental protection -- Periodicals
628.05 - Journal URLs:
- http://www.tandfonline.com/toc/tent20/current ↗
http://www.tandfonline.com/ ↗ - DOI:
- 10.1080/09593330.2019.1646323 ↗
- Languages:
- English
- ISSNs:
- 0959-3330
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 3791.698800
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 22484.xml