Pyrene-Based Conjugated Polymer/Bi2MoO6 Z-Scheme Hybrids: Facile Construction and Sustainable Enhanced Photocatalytic Performance in Ciprofloxacin and Cr(VI) Removal under Visible Light Irradiation

Abstract

Abstract:The search for appropriate materials with favorable staggered energy band arrangements is important and is a great challenge in order to fabricate Z-scheme photocatalysts with high activity in visible light. In this study, we demonstrated a facile and feasible strategy to construct highly active organic-inorganic Z-scheme hybrids (P-BMO) with linear pyrene-based conjugated polymer (P17-E) and Bi 2 MoO 6 , via an in-situ palladium-catalyzed cross-coupling reaction. The characterization results revealed C-O chemical bond formed at the heterointerface between P17-E and Bi 2 MoO 6 after in-situ polycondensation and endowed the hybrids with observably improved photogenerated carries transfer capabilities. Visible, light-driven photocatalytic removal of ciprofloxacin and Cr(VI) were significantly enhanced after the incorporation of P17-E into Bi 2 MoO 6 , whether with the morphology of nanosheets, nanobelts, or microspheres. Moreover, these P-BMO hybrids were also found to exhibit excellent sustainable photocatalytic performance after four runs of photocatalytic evaluation tests, suggesting their high activity and stability. To better eliminate the redox ability enhancement of P-BMO, a reasonable Z-scheme electrons transferring mechanism between P17-E and Bi 2 MoO 6 was proposed and proved by the determination of •O 2 -and •OH and Pt nanoparticles photodeposition experiments. This work might provide a viable source and insight into the design of Z-scheme photocatalysts with excellent redox ability for environmental remediation.

Facile Synthesis of Bi2MoO6 Microspheres Decorated by CdS Nanoparticles with Efficient Photocatalytic Removal of Levfloxacin Antibiotic

“…By contrast, the LEV degradation rate was substantially suppressed by BQ (quencher of O The bandgap (E g ) of Bi 2 MoO 6 and CdS were calculated by the equation: (αhν) = A(hν-E g ) n/2 . As presented in Figure S2, the E g of Bi 2 MoO 6 and CdS are about 2.66 eV and 2.24 eV, consistent with the reference [32,40,42]. The valence band (VB) and conduction band (CB) of Bi 2 MoO 6 and CdS can be obtained by the following equation: (2).…”

Rational Design of Alkynyl-Based Linear Donor−π–Acceptor Conjugated Polymers with Accelerated Exciton Dissociation for Photocatalysis

“…The trapping experiments are subsequently conducted to analyze the participation of the active species during RhB decomposition. AgNO 3 , TEOA, isopropanol, superoxide dismutase (SOD), and l -histidine are taken as the scavengers for e – , h + , • OH, • O 2 – , and 1 O 2 , respectively. , As displayed in Figure f,g, the inhibition rates of SOD, l -histidine, and TEOA toward RhB degradation are 59.0, 74.7, and 92.7%, respectively, indicating that • O 2 – , 1 O 2 , and h + are the dominant active species in RhB degradation.…”

Plate-to-Layer Bi2MoO6/MXene-Heterostructured Anode for Lithium-Ion Batteries

“…Among various TMOs, bismuth molybdate (Bi 2 MoO 6 ) with a structure of alternate [Bi 2 O 2 ] 2+ layers and [MoO 4 ] 2− perovskite layers can be potentially used as an anode material for LIBs due to its high theoretical capacity (791 mAh g −1 ) as well as low desertion potential (< 1.0 V) [26,27]. Up to date, most reports about Bi 2 MoO 6 focused on its photocatalyst properties, while its application in LIBs, which has great significance, still needs further development.…”