Optimized Design of Pt‐Doped Bi₂WO₆ Nanoparticle Synthesis for Enhanced Photocatalytic Properties

Abstract

Abstract:The preparation of photocatalytic heterostructures of platinum on Bi 2 WO 6 nanoparticles by a wet reduction method is described in this report and compared with other preparation methods. The as-obtained photocatalysts were characterized by XPS and TEM, the results of which confirmed the presence of solely zero-valent metal nanoparticles on the surface of Bi 2 WO 6 . The photocatalytic activity of these heterostructures was evaluated by the degradation of Rhodamine B under blue light (λ max = 445 nm). The deposited noble metal nanoparticles were

Photocatalytic aerobic oxidation of toluene and its derivatives to aldehydes on Pd/Bi 2 WO 6

“…Pd nanoparticles proved to be the most effective cocatalyst in this reaction system, affording benzaldehyde with 3.42% conversion and 90% selectivity (Table 2, entry 4). Although the loading of nanoparticles on the Bi2WO6 samples may have blocked part of the active site, the higher charge separation efficiency and enhanced reduction reaction made Pd/Bi2WO6 a more effective catalyst than neat Bi2WO6 for toluene oxida-tion [51]. It should be noted that, with a reaction rate of 1140 μmol/g/h, the catalytic activity of Pd/Bi2WO6-4 for the oxidation of toluene was superior to that observed for any previously reported photocatalytic system [52].…”

Photoinduced Synthesis of Hierarchical Flower-Like Ag/Bi2WO6 Microspheres as an Efficient Visible Light Photocatalyst

“…The photocatalytic results were compared with the already-present related literature; the reaction rate constant of Ag/Bi 2 WO 6 synthesized by sonochemical methods [22] or ultrasonic vibration processes [23] was 0.0332 or 0.0279 min −1 , respectively. The reaction rate constant of Pt/Bi 2 WO 6 [24] using the photoreduction process similar to our synthesis method was 0.035 min −1 . Obviously, AB-20 was much more active than Ag/Bi 2 WO 6 synthesized by other methods or other metals such as Pt deposited on Bi 2 WO 6 using the same method, demonstrating that AB-20 displayed excellent photocatalytic activity.…”

Degradation of rhodamine B photocatalyzed by hydrothermally prepared Pd-doped Bi2MoO6 nanoplates

“…The result indicates that the Pd-doped Bi 2 MoO 6 nanoplates have the excellent photocatalytic performance. They should be noted that the absorption peak was gradually shifted from 554 to 498 nm and the photodegradation was sequenced as follows: fully N,N,N′,N′-tetraethylated rhodamine (554 nm), N,N,N′-triethylated rhodamine (539 nm), N,N′-diethylated rhodamine (522 nm), N-ethylated rhodamine (510 nm) and rhodamine (498 nm) [14,19,30,40,41]. Upon doping with Pd, the absorption peak was slightly shifted due to the chromophore cleavage and de-ethylation of RhB solution photocatalyzed by Pd-doped Bi 2 MoO 6 under visible light irradiation [42,43].…”

“…Narrowing of band gap and delaying of photo-excited electron-photoinduced hole pairs can lead to enhance degradation rate [9,13,14]. To solve this problem, noble metals such as Ag [14,15], Au [16], Pt [17][18][19] and Pd [20][21][22] have been selected to improve photocatalytic kinetics by being doped to Bi 2 MoO 6 lattice. The advantage of this process is to delay recombination of charge carriers and to enhance degradation kinetics [15,16,20].…”