Efficient Nitrate Photoreduction to Ammonia Over S-Scheme-Mediated Nico2s4-P-G-C3n4 DOI
Rahul Gupta, Umair Alam, Nishith Verma

и другие.

Опубликована: Янв. 1, 2024

Photocatalysis offers a promising avenue for the efficient removal of nitrate compounds from water by harnessing solar energy and transforming them to ammonia. The constraints such as rapid charge carrier recombination comparatively low selectivity, however, hinder widespread application technology. In this study, an inexpensive bimetal sulphide (NiCo2S4, NCS) is anchored over phosphorus (P)-doped g-C3N4 (PCN) sheets. NCS-PCN binary composite synthesized ultrasonication-calcination method. effect materials compositions dose on photocatalytic nitrate-reduction activity determined. Notably, with 30% (w/w) NCS shows optimal nitrate- reduction, achieving 99% in 4 h, ammonia selectivity increased ~56 96%, compared PCN alone under identical conditions. photocatalyst also remarkable stability, experiencing marginal decrease less than 1% after 5 reaction-regeneration cycles. observed enhanced activity, supported radical scavenging tests X-ray photoelectron spectroscopy analysis, provides evidence S-scheme-mediated transfer mechanism heterojunction. This study not only contributes valuable insights into light-harvesting but paves way sustainable processes large scale.

Язык: Английский

Unlocking the potential of metal vanadates for energy, environment and biomedicine: Pioneering developments and perspectives DOI

S. N. Ojha,

Saptarshi Roy, Md. Ahmaruzzaman

и другие.

Coordination Chemistry Reviews, Год журнала: 2025, Номер 534, С. 216553 - 216553

Опубликована: Март 13, 2025

Язык: Английский

Процитировано

1
S-Scheme-Mediated NiCo2S4–P–g-C3N4 Heterojunction for Selective Nitrate Reduction to Ammonia DOI
Rahul Gupta, Umair Alam, Raushan Kumar

и другие.

ACS Applied Engineering Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 7, 2025

Photocatalysis offers a promising avenue for the efficient removal of nitrate compounds from water by harnessing solar energy and transforming them to ammonia. The constraints, such as rapid charge carrier recombination comparatively low selectivity, however, hinder widespread application technology. In this study, an inexpensive bimetal sulfide (NiCo2S4, NCS) is anchored over phosphorus (P)-doped g-C3N4 (PCN) sheets. fabricated NCS-PCN heterojunction tested photocatalytic nitrate-reduction activity. Notably, dose composite with 30% (w/w) NCS shows optimal reduction, achieving 99% in 4 h, ammonia selectivity increasing ∼56 96%, compared PCN alone under identical conditions. photocatalyst also remarkable stability, experiencing marginal decrease less than 1% activity after 5 reaction-regeneration cycles. isotope labeling test using nuclear magnetic resonance spectroscopy confirms that salt supplied feedstock nitrogen source formed during photoreduction. observed enhanced activity, supported radical scavenging tests, electronic paramagnetic measurements, X-ray photoelectron spectroscopy, situ diffuse reflectance infrared Fourier transform spectroscopic analyses, provides evidence S-scheme-mediated transfer mechanism heterojunction. This study not only contributes valuable insights into light-harvesting but paves way sustainable processes on large scale.

Язык: Английский

Процитировано

0
Thermal and/or Microwave Treatment: Insight into the Preparation of Titania-Based Materials for CO2 Photoreduction to Green Chemicals DOI Creative Commons
Iwona Pełech,

Daniel Sibera,

Piotr Staciwa

и другие.

Molecules, Год журнала: 2024, Номер 29(15), С. 3646 - 3646

Опубликована: Авг. 1, 2024

Titanium dioxide was synthesized via hydrolysis of titanium (IV) isopropoxide using a sol-gel method, under neutral or basic conditions, and heated in the microwave-assisted solvothermal reactor and/or high-temperature furnace. The phase composition prepared samples determined X-ray diffraction method. specific surface area pore volumes were through low-temperature nitrogen adsorption/desorption studies. photoactivity tested photocatalytic reduction carbon dioxide. gas analyzed chromatography, hydrogen, oxide, methane identified. influence pH heat treatment on physicochemical properties titania-based materials during photoreduction have been studied. It found that photocatalysts environment shown to result higher content monoxide, compared obtained conditions. highest amounts hydrogen detected processes microwave reactor, double-heated photocatalysts.

Язык: Английский

Процитировано

1
Efficient Nitrate Photoreduction to Ammonia Over S-Scheme-Mediated Nico2s4-P-G-C3n4 DOI
Rahul Gupta, Umair Alam, Nishith Verma

и другие.

Опубликована: Янв. 1, 2024

Photocatalysis offers a promising avenue for the efficient removal of nitrate compounds from water by harnessing solar energy and transforming them to ammonia. The constraints such as rapid charge carrier recombination comparatively low selectivity, however, hinder widespread application technology. In this study, an inexpensive bimetal sulphide (NiCo2S4, NCS) is anchored over phosphorus (P)-doped g-C3N4 (PCN) sheets. NCS-PCN binary composite synthesized ultrasonication-calcination method. effect materials compositions dose on photocatalytic nitrate-reduction activity determined. Notably, with 30% (w/w) NCS shows optimal nitrate- reduction, achieving 99% in 4 h, ammonia selectivity increased ~56 96%, compared PCN alone under identical conditions. photocatalyst also remarkable stability, experiencing marginal decrease less than 1% after 5 reaction-regeneration cycles. observed enhanced activity, supported radical scavenging tests X-ray photoelectron spectroscopy analysis, provides evidence S-scheme-mediated transfer mechanism heterojunction. This study not only contributes valuable insights into light-harvesting but paves way sustainable processes large scale.

Язык: Английский

Процитировано

0