The Synergistic Effect of Adsorption-Photocatalysis for Removal of Organic Pollutants on Mesoporous Cu2V2O7/Cu3V2O8/g-C3N4 Heterojunction

Abstract

Cu2V2O7/Cu3V2O8/g-C3N4 heterojunctions (CVCs) were prepared successfully by the reheating synthesis method. The thermal etching process increased the specific surface area. The formation of heterojunctions enhanced the visible light absorption and improved the separation efficiency of photoinduced charge carriers. Therefore, CVCs exhibited superior adsorption capacity and photocatalytic performance in comparison with pristine g-C3N4 (CN). CVC-2 (containing 2 wt% of Cu2V2O7/Cu3V2O8) possessed the best synergistic removal efficiency for removal of dyes and antibiotics, in which 96.2% of methylene blue (MB), 97.3% of rhodamine B (RhB), 83.0% of ciprofloxacin (CIP), 86.0% of tetracycline (TC) and 80.5% of oxytetracycline (OTC) were eliminated by the adsorption and photocatalysis synergistic effect under visible light irradiation. The pseudo first order rate constants of MB and RhB photocatalytic degradation on CVC-2 were 3 times and 10 times that of pristine CN. For photocatalytic degradation of CIP, TC and OTC, it was 3.6, 1.8 and 6.1 times that of CN. DRS, XPS VB and ESR results suggested that CVCs had the characteristics of a Z-scheme photocatalytic system. This study provides a reliable reference for the treatment of real wastewater by the adsorption and photocatalysis synergistic process.

Induced abundant oxygen vacancies in Sc2VO5−δ/g-C3N4 heterojunctions for enhanced photocatalytic degradation of levofloxacin

“…It was another evidence to indicate that the photogenerated carrier separation efficiency of 10%SVC was higher than that of CN. 59 It could therefore effectively enhance photocatalytic degradation activity of LVX.…”

Metal Oxides Nanoparticles: General Structural Description, Chemical, Physical, and Biological Synthesis Methods, Role in Pesticides and Heavy Metal Removal through Wastewater Treatment

“…Although the effectiveness of nano-adsorbents in removing organic compounds is remarkable, there are limitations to the use of conventional materials, such as separation from aqueous media and recycling using nano-adsorbents and nano-catalysts [ 152 ]. Feng et al [ 153 ] utilized a reheating preparation approach to fabricate Cu 2 V 2 O 7 /Cu 3 V 2 O 8 /g-C 3 N 4 heterojunctions (CVCs). A higher surface area was obtained via the thermal etching process.…”

“…The CVCs showed excellent adsorption and photocatalysis activities. It was found that CVC-2 comprising of 2 wt% of Cu 2 V 2 O 7 /Cu 3 V 2 O 8 exhibited higher levels for the removal of different dyes and antibiotics; (96.2%) of methylene blue (MB), (97.3%) of rhodamine B (RhB), (83%) of ciprofloxacin (CIP), (86%) of tetracycline (TC), and (80.5%) of oxytetracycline (OTC) were removed via the adsorption and photocatalysis performance under visible light irradiation [ 153 ].…”

Recent Advances in Synthesis, Characterization and Applications of Innovative Materials in Removal of Water Contaminants

“…In this Special Issue, Feng et al reported that the synergistic effect of adsorptionphotocatalysis for the removal of organic pollutants on mesoporous Cu 2 V 2 O 7 /Cu 3 V 2 O 8 /g-C 3 N 4 heterojunctions (CVCs) enhanced visible light absorption and improved the separation efficiency of photoinduced charge carriers [18]. CVCs exhibited superior adsorption capacity and photocatalytic performance in comparison with pristine g-C 3 N 4 (CN) CVC-2 (containing 2 wt% of Cu 2 V 2 O 7 /Cu 3 V 2 O 8 ) [18]. Good synergistic removal efficiencies were obtained for dyes (96.2% for methylene blue, 97.3% for rhodamine B) and antibiotics (83.0% for ciprofloxacin, 86.0% for tetracycline and 80.5% for oxytetracycline) [18].…”

“…CVCs exhibited superior adsorption capacity and photocatalytic performance in comparison with pristine g-C 3 N 4 (CN) CVC-2 (containing 2 wt% of Cu 2 V 2 O 7 /Cu 3 V 2 O 8 ) [18]. Good synergistic removal efficiencies were obtained for dyes (96.2% for methylene blue, 97.3% for rhodamine B) and antibiotics (83.0% for ciprofloxacin, 86.0% for tetracycline and 80.5% for oxytetracycline) [18]. The pseudofirst-order rate constants of methylene blue and rhodamine B photocatalytic degradation on CVC-2 were 3 times and 10 times that of pristine g-C 3 N 4 .…”