Benzquinamide Hydrochloride

Recently, p-n type heterojunctions have been considered promising photocatalysts for application in energy conversion and storage systems.Therefore, in this study, the photoelectrodeposition-assisted anodization method has been proposed as a novel procedure to construct a p-n type heterojunction hybrid consisting of NiO nanoparticles (with different dosages) and 1D TiO₂ nanotube arrays (NiO/TNTs) for wastewater purificationThe results revealed that using the photoelectrodeposition-assisted anodization method not only led to the introduction of Ni²⁺ and Ti³⁺ into TiO₂ anatase lattice, but also significantly enlarged TNTs' dimension.Furthermore, incorporating TNTs with NiO had a significant impact on its optical properties, in which doping 4 wt% of Ni²⁺ (NiO-TNTs (4%)) reduced the band gap energy from 3 to 1.6 eV.Also, by coupling an optimum dosage of NiO, the photocurrent d. and photoconversion efficiency of TNTs were remarkably boosted from 0.17 to 0.58 mA.cm^-2 and from 0.11% to 0.34%, resp.Due to the promotion in optical properties and photo-induced charge generation, NiO-TNTs (4%) indicated much better photocatalytic activity than the pure sample.As compared with TNTs, the 2,4-dichlorophenol degradation percentage by NiO-TNTs (4%) increased from 75% to 100% under UV and from 49% to 71% under visible light irradiationMoreover, the kinetics study confirmed that all photocatalytic reactions followed zero-order kinetics.Based on scavenging reactive species tests, holes (h+) had the main portion (with 43%) in 2,4-dichlorophenol degradation by NiO-TNTs (4%).The rest of the degradation pathways were proceeded with e-, •OH, and •O^-2 species by accounting for 27%, 21% and 9%, resp.

Adipic acid (HOOC(CH₂)₄COOH, AA) is a crucial chemical in industrial manufactures and mainly produced by the oxidation of cyclohexane with air and nitric acid via a homogeneous two step path in industry. However, the conventional industrial method inevitably results in the generation of nitrous oxide (N₂O, etc.), which is the main cause of the greenhouse effect and ozone depletion. Herein, we engineered five kinds of carbon dots (CDs) with different oxygen-containing functional groups on their surfaces, which were directly used as catalysts over the selective catalytic oxidation of cyclohexane. Among the five CDs, the hydroxyl-terminated CDs show the best catalytic activity with the conversion of cyclohexane ~ 29.43% and selectivity to AA ~ 95.89% under 130 °C, 20 atm with oxygen as oxidant. With the CDs directly as catalyst, the one-step efficient catalytic oxidation reaction for cyclohexane to AA was realized to replace the two-step routes. In addition, the density functional theory (DFT) computational results were performed to further prove that the more quantity of hydroxyl on CDs and the higher O₂ pressure can boost the higher catalytic activity of CDs over oxidation of cyclohexane.