Trifunctional Nature of Heteroatom (B, N, S, O)‐Doped Waste Diesel Soot: Turning Pollutants Into Potential Energy Catalysts for HER, OER, and ORR

Carbon Neutralization, Journal Year: 2025, Volume and Issue: 4(2)

Published: Feb. 12, 2025

ABSTRACT This study delves into the innovative use of multiheteroatom‐doped vehicle exhaust soot as a catalyst for oxygen reduction reactions (ORR) and hydrogen/oxygen evolution (OER/HER), presenting transformative approach in energy materials. The synergistic effects boron, nitrogen, oxygen, sulfur (B, N, O, S) heteroatom doping on carbon nanoparticles (CNPs) were explored thoroughly experimentally through density functional theory (DFT) modeling, revealing potential these materials tri‐purpose catalysts converting pollutants electrocatalysts. B‐CNPs had lowest overpotential (338 mV) at current 10 mA/cm 2 , whereas reaction kinetics B–N–S‐CNPs superior, they Tafel slope (83.09 mV/dec). Furthermore, all heteroatom‐doped CNPs perform better terms OER than pristine CNPs, are range 1.05–1.15 V (values deducted from theoretical 1.23 vs. RHE) . In ORR, highest limiting density, onset potential, half‐wave overpotential, which 1.70 0.86, 0.64 V, respectively. addition to experimental investigations, DFT simulations used calculate binding (BE), interaction (IE/ E ads ), HOMO‐LUMO band gap, charge transfer (CT), noncovalent (NCI) plot, QTAIM molecular graphs provided evocative outcomes expected. multifaceted integrates analyses, contributing comprehensive understanding catalytic soot.

Language: Английский

---

Unraveling the Plasmonic Effect of Au in Promoting Photocatalytic H₂ Generation and Organic Synthesis

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(46), P. 17026 - 17034

Published: Nov. 7, 2024

Incorporating plasmonic nanostructures into photocatalysts significantly enhances catalytic efficiency due to effects. In this study, we successfully developed a heterojunction between organic semiconductor zinc porphyrin (Zn-TCPP) and colloidal gold (Au) nanoparticles connected via Au–O bonds. The formation of bonds Zn-TCPP Au facilitates charge transfer by reducing the Schottky barrier at interface. Finite-difference time-domain simulations, in situ XPS measurements, infrared thermal imaging confirm that strong localized surface plasmon resonance effect local electric field photothermal effect, promoting separation electron–hole pairs Zn-TCPP/Au sample improving reaction kinetics. optimal Zn-TCPP/Au-2% composite demonstrates an impressive H2 generation rate 1610 μmol·g–1·h–1, which is 2.7 8.6 times greater than TCPP samples, respectively. Additionally, shows high C–N coupling benzylamine imine, achieving yield 45.1 mmol·g–1 24 h. This study provides comprehensive understanding how activity photocatalysts.

Language: Английский

---

Microwave-Assisted Synthesis of Pd/g-C3N4 for Enhanced Photocatalytic Degradation of Sulfamethoxazole

Inorganics, Journal Year: 2025, Volume and Issue: 13(4), P. 118 - 118

Published: April 8, 2025

Sulfamethoxazole (SMX) is a widely used antibiotic for bacterial infections and frequently found in surface waters wastewater treatment plant effluents, where it commonly co-administered with trimethoprim. Because of its emerging ecological health risks, the development effective elimination strategies urgently required. In this study, rapid microwave-assisted technique was employed to synthesize Pd/g-C3N4 photocatalyst SMX aqueous solution. The structure optical properties all samples were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), photoluminescence (PL), UV–visible diffuse reflectance spectroscopy. photocatalytic performance systematically evaluated under visible-light irradiation. results demonstrated that achieved 97% removal efficiency, significantly outperforming pure g-C3N4, which reached only 57% removal. degradation rate constant calculated be 0.0139 min−1, approximately 6.6 times higher than bare g-C3N4. This enhanced attributed incorporation Pd nanoparticles, effectively suppressed recombination photogenerated electron–hole pairs promoted charge separation. influence key operational parameters, including pH, concentration, catalyst dose, examined. Furthermore, mechanism explored elucidate pathways.

Language: Английский

---

Polymer Nanospheres Prepared by Metal Nanoparticles Initiation: Prospects for Application in Enhanced Oil Recovery

Journal of Applied Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 15, 2025

ABSTRACT Recent developments in enhanced oil recovery (EOR) have identified polyacrylamide (PAAm) nanospheres as a promising material for reservoir applications. The incorporation of copper nanoparticles (Cu NPs) into these is anticipated to substantially enhance EOR performance. In this work, Cu NPs were employed an alternative conventional initiators the synthesis NPs/PAAm nanospheres. formation mechanism was investigated, and their performance evaluated. Experimental results revealed that can be effectively nanospheres, achieving average utilization efficiency over 85%. exhibited particle size approximately 20 nm, significantly smaller than redox PAAm (> 35 nm). This reduction improved droplet removal rate. During microchannel displacement experiments, outperformed maintaining exceeding 80% under injection conditions. work provides valuable insights advancing technology.

Language: Английский

---

Surface plasmon resonance and structure defects synergetic effect of ZnCdS2/NiMoO4@Cu Z-scheme heterojunction for enhanced photocatalytic CO2 reduction to CH4

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 18, 2024

ZnCdS 2 /NiMoO 4 @Cu Z-scheme heterojunctions exhibit outstanding activity and nearly 100% selectivity for photocatalytic CO reduction to CH under the combined effects of surface defects, heterojunction photothermal properties.

Language: Английский

---