The identification of byproducts from the catalytic reduction reaction of 4-nitrophenol to 4-aminophenol: A systematic spectroscopic study

Anchoring Pd Nanoparticles with Low Loading on Co,N‐Doped Carbon Framework for the Synergistic Reduction of Nitrophenols

“…Thus the dosage of the catalyst was fixed at 50 μg in the following reactions. Furthermore, the formation of 4‐AP can be monitored through the photoluminescence signal intensity [41,42] . The fluorescence signal of 4‐AP can be observed at 373 nm, which also confirmed the formation of 4‐AP under 300 nm excitation with xenon lamp (Figure 5).…”

“…Furthermore, the formation of 4-AP can be monitored through the photoluminescence signal intensity. [41,42] The fluorescence signal of 4-AP can be observed at 373 nm, which also confirmed the formation of 4-AP under 300 nm excitation with xenon lamp (Figure 5). Then, the reduction of 4-NP catalyzed by Co@NC and Pd/ Co@NC with different weight loading of Pd was shown in Figure 6 and Figure S3.…”

Reduction of 4-nitrophenol using green-fabricated metal nanoparticles

“…that are capable of bioreducing metal ions to metal NPs. 32,34,35 For the fabrication of NPs via green synthesis, most studies report the extraction of the substrate from plant matter, as shown in our previous study, where Coffea arabica seed (CAS) powder was used as a green precursor, where 50 mL of distilled water was mixed with 0.6 g of CAS power at 85 C. 28 Aer this process, the extract was ltered and metallic salts were added. When the reducing agents from the CAS extract came in contact with the metal salts, a visual color change was observed (the color variation depends on the metal ions), revealing the formation of NPs.…”

PDDA induced step-pyramidal growth of nickel–platinum (Ni–Pt) nanoparticles for enhanced 4-nitrophenol reduction

“…The curves were treated as a pseudo-first order reaction, 31,32 so the first-order rate constant ( k app ) was determined through the equation In( C t / C 0 ) = − k app ⋅ t , where C t is the concentration of 4-NP at time t , and C 0 is the initial concentration. The calculated k app of Ni–Pt SPNPs (0.377 min −1 , 14.7 μg) is 4.1 times higher than that of Ni–Pt RNPs (0.091 min −1 , 147 μg), and 9.4 times higher than that of bare Pt NPs (0.040 min −1 , 147 μg).…”

“…27,28 4-nitrophenol (4-NP) is an intermediate product in the synthesis of several substances, and its removal from residual water has been a critical issue since it is recognized as a priority hazardous pollutant by the Environmental Protection Agency (EPA) due to its poisonous and volatile nature. [29][30][31] Different metal NPs have been employed for the reduction of these contaminants by catalytic degradation or conversion to low-toxicity molecules. [32][33][34][35][36][37] Herein, we report for the first time the synthesis of anisotropic step-pyramidal Ni-Pt NPs (SPNPs).…”