The co-existence of organic contaminants and heavy metals including 4-chlorophenol (4-CP) and Cr(VI) in aquatic system have become a challenging task in the wastewater treatment. Herein, the synchronous photocatalytic decomposition of 4-CP and Cr(VI) over new Z-scheme CoFe2O4/P-BiOBr heterojunction nanocomposites were revealed. In this work, the nanocomposites were successfully developed via a surfactant-free hydrothermal method. The heterojunction interface was created by decorating magnetic CoFe2O4 nanoparticles onto P-BiOBr nanosheets. The as-fabricated CoFe2O4/P-BiOBr nanocomposites substantially improved the synchronous decomposition of 4-CP and Cr(VI) compared to the single-phase component samples under visible light irradiation. Particularly, the 30-CoFe2O4/P-BiOBr nanocomposite displayed the best photocatalytic performance, which decomposed 95.6% 4-CP and 100% Cr(VI) within 75 min. The photocatalytic improvement was assigned to the Z-scheme heterojunction assisted charge migration between CoFe2O4 and P-BiOBr, and the acceleration of charge carrier separation was validated by the findings of charge dynamics measurements. The harmful 4-CP was photodegraded into smaller organics whereas the Cr(VI) was photoreduced into Cr(III) after 30-CoFe2O4/P-BiOBr photocatalysis, and the good recyclability of fabricated nanocomposite in photocatalytic reaction also showed promising potential for practical applications in environmental remediation. Finally, the radical quenching tests confirmed that there existed the Z-scheme path of charge migration in CoFe2O4/P-BiOBr nanocomposite, which was the mechanism responsible for its high photoactivity. 

Enhanced synchronous photocatalytic 4-chlorophenol degradation and Cr(VI) reduction by novel magnetic separable visible-light-driven Z-scheme CoFe2O4/P-doped BiOBr heterojunction nanocomposites.

Unraveling highly efficient nanomaterial photocatalyst for pollutant removal: a comprehensive review and future progress

Photocatalytic degradation of ammonium dinitramide over novel S-scheme g-C3N4/BiOBr heterostructure nanosheets

Microwave-assisted hydrothermal synthesis of broadband Yb3+/Er3+ co-doped BiOI/Bi2O4 photocatalysts with synergistic effects of upconversion and direct Z-scheme heterojunction

Boosted photodegradation of tetracycline hydrochloride over Z-scheme MIL-88B(Fe)/Bi2WO6 composites under visible light

Ionic liquid-hydrothermal synthesis of Z-scheme BiOBr/Bi2WO6 heterojunction with enhanced photocatalytic activity

Preparation of flower-like BiOBr/Bi2WO6 Z-scheme heterojunction through an ion exchange process with enhanced photocatalytic activity

The rare earth ion Yb3+ doped Bi2WO6 photocatalysts were synthesized by hydrothermal method. Moreover, XRD, XPS, FESEM, TEM, Ramam, N2 adsorption-desorption isotherm measurements and UV-vis diffusion reflectance spectra were used to characterize the Yb3+ doped Bi2WO6 photocatalysts. The morphology, specific surface area, and pore volume distribution were greatly affected after Yb3+ ions doping. Photocatalytic performance of Bi2WO6 was effectively enhanced after Yb3+ ions doping, 6% Yb3+ doped Bi2WO6 had the best photocatalytic performance, and 96.2% Rhodamine B was degradated after irradiated 30 min, which was 1.29 times that of the pristine one. The enhanced photocatalytic performance was due to the increased specific surface area, decreased energy band gap and inhibition of photoelectron-hole recombination after Yb3+ ions doping.

Rare Earth Ion Yb3+ Doping of Bi2WO6 with Excellent Visible-light Photocatalytic Activity

Influence of Al particle layer on damping behavior of Alp/7075Al composites fabricated by hot rolling

The invention provides a bismuth tungstate-carbon nitride-silver phosphate ternary efficient visible-light catalyst and a preparation method therefor. The ternary efficient visible-light catalyst andthe preparation method therefor are used for solving the difficult problem that photocatalytic performance of bismuth tungstate is not excellent enough. The ternary composite photocatalyst is preparedfrom bismuth tungstate nanosheets, carbon nitride nanosheets and nano silver phosphate which are stacked, wherein the bismuth tungstate nanosheets have the length of 0.8 to 1 micron and the width of0.4 to 0.6 micron, the carbon nitride nanosheets have the length of 0.6 to 0.8 micron and the width of 0.2 to 0.4 micron, and silver phosphate particles have the size of 50 to 100 nanometers. According to the ternary efficient visible-light catalyst and the preparation method therefor, a hydrothermal-precipitation method is applied to preparation of the bismuth tungstate-carbon nitride-silver phosphate ternary composite photocatalyst, and a powdery bismuth tungstate-carbon nitride-silver phosphate complex with excellent visible-light catalysis performance is obtained through firstly synthesizing a bismuth tungstate-carbon nitride complex by adopting a hydrothermal method, compounding silver phosphate into bismuth tungstate-carbon nitride by applying a precipitation method, carrying out filtering so as to obtain precipitates, and carrying out washing and drying. The preparation method provided by the invention is simple, is easy in operation and is beneficial to extensive use of productive practice.

Yanwu Wang

Papers

Ionic liquid-hydrothermal synthesis of Z-scheme BiOBr/Bi2WO6 heterojunction with enhanced photocatalytic activity

Preparation of flower-like BiOBr/Bi2WO6 Z-scheme heterojunction through an ion exchange process with enhanced photocatalytic activity

Rare Earth Ion Yb3+ Doping of Bi2WO6 with Excellent Visible-light Photocatalytic Activity

Influence of Al particle layer on damping behavior of Alp/7075Al composites fabricated by hot rolling

Bismuth tungstate-carbon nitride-silver phosphate ternary efficient visible-light catalyst and preparation method therefor