Photocatalytic degradation of butyl benzyl phthalate by S-scheme Bi/Bi2O2CO3/Bi2S3 under simulated sunlight irradiation

As a kind of plasticizer, butyl benzyl phthalate (BBP) presents a serious hazard to the ecosystem. Therefore, there is a strong need for an effective technique to eliminate the risk of BBP. In this work, a new photocatalyst of Bi/Bi2O2CO3/Bi2S3 with an S-scheme heterojunction was synthesized using Bi(NO3)3 as the Bi source, Na2S as the S source, and DMF as the carbon source and reductant. Numerous techniques have been used to characterize Bi/Bi2O2CO3/Bi2S3, such as scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The improved photoactivity of Bi/Bi2O2CO3/Bi2S3 was evaluated by photoelectrochemical response, electrochemical impedance spectroscopy, photoluminescence, UV-Vis diffuse reflectance spectroscopy, and electrochemical Mott Schottky spectroscopy. The enhanced photocatalytic activity of this composite for BBP degradation under simulated sunlight irradiation could be attributed to the surface plasmon resonance effect of Bi metal and the heterojunction structure of Bi2O2CO3 and Bi2S3. The degradation rate of Bi/Bi2O2CO3/Bi2S3 was 85%, which was 4.52 and 1.52 times that of Bi2O2CO3 and Bi2S3, respectively. The prepared photocatalyst possessed good stability and reproducibility in eliminating BBP. The improved photocatalytic activity of Bi/Bi2O2CO3/Bi2S3 was demonstrated with the formation of an S-scheme heterojunction, and the degradation mechanism was discussed with a liquid chromatograph mass spectrometer.

Formamide-assisted one-step synthesis of BiOCOOH and Bi/BiOCOOH micro-/nanostructures with tunable morphologies and composition and their photocatalytic activities

A series of BiOCOOH and Bi/BiOCOOH heterojunction photocatalysts have been facilely synthesized by a one-step reaction with the assistance of formamide.

Synthesis, crystallography, microstructure, crystal defects, and morphology of BixZn1−xO nanoparticles prepared by sol–gel technique

This study was allocated to synthesis Bi_xZn_1−xO (0.00 ≤ x ≤ 0.06) nanoparticles. In addition, to study the microstructural properties, crystal imperfections and the morphology for these samples.

In-Situ Hydrothermal Synthesis of Bi-Bi2O2CO3 Heterojunction Photocatalyst with Enhanced Visible Light Photocatalytic Activity

Bismuth containing nanomaterials recently received increasing attention with respect to environmental applications because of their low cost, high stability and nontoxicity. In this work, Bi-Bi₂O₂CO₃ heterojunctions were fabricated by in-situ decoration of Bi nanoparticles on Bi₂O₂CO₃ nanosheets via a simple hydrothermal synthesis approach. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) were used to confirm the morphology of the nanosheet-like heterostructure of the Bi-Bi₂O₂CO₃ composite. Detailed ultrafast electronic spectroscopy reveals that the in-situ decoration of Bi nanoparticles on Bi₂O₂CO₃ nanosheets exhibit a dramatically enhanced electron-hole pair separation rate, which results in an extraordinarily high photocatalytic activity for the degradation of a model organic dye, methylene blue (MB) under visible light illumination. Cycling experiments revealed a good photochemical stability of the Bi-Bi₂O₂CO₃ heterojunction under repeated irradiation. Photocurrent measurements further indicated that the heterojunction incredibly enhanced the charge generation and suppressed the charge recombination of photogenerated electron-hole pairs.

Synthesis of one-dimensional Bi2O2CO3–Bi(OHC2O4)·2H2O heterojunctions with excellent adsorptive and photocatalytic performance

Novel one-dimensional Βi₂O₂CO₃–Βi₂(OHC₂O₄)·2H₂O heterostructure photocatalyst exhibits outstanding photocatalytic activity for degrading high concentration RhB, MB and MO dyes, and excellent adsorptive capability to MO dye.

Application of CuS-functionalized ZnO nanoflakes for a paper-based photoelectrochemical immunoassay using an in situ electron donor producing strategy

Copper sulfide functionalized ZnO nanoflakes were used to construct a paper-based photoelectrochemical immunosensor using an in situ electron donor producing strategy.