The complete decomposition of formaldehyde(HCHO) at ambient temperature is the most potential strategy for HCHO elimination from indoor environment.Herein,extra low content of Pt nanoparticles(0.025 wt%)supported on w...The complete decomposition of formaldehyde(HCHO) at ambient temperature is the most potential strategy for HCHO elimination from indoor environment.Herein,extra low content of Pt nanoparticles(0.025 wt%)supported on water-solubility carbon nitride/ceria(Pt/gC_(3)N_(4)@CeO_(2)) was prepared for gaseous HCHO removal at ambient temperature in a simulated indoor environment.Fluorescent light(8 W) illumination could visibly boost the complete decomposition of HCHO into CO_(2) over Pt/gC_(3)N_(4)@CeO_(2).The cooperative effect in the distinct heterostructure and plenty of surface reactive oxygen species contribute primarily to the enhanced catalytic performance of Pt/g-C_(3)N_(4)@CeO_(2).Moreover,the possible mechanism of HCHO oxidation over Pt/g-C_(3)N_(4)@CeO_(2) assisted by the fluorescent light irradiation was proposed based on the physicochemical and optical characterization as well as the result of in situ diffuse reflectance infrared Fourier transform spectra.This work might shed some light on the potential application of the versatile catalysts for ambient-temperature catalytic decomposition of HCHO by making full use of the indoor energies.展开更多
Formaldehyde(HCHO)is a toxic by-product widely generated in industrial processes,presenting significant environmental and health risks.Utilizing solar energy to convert HCHO into hydrogen(H2)and other clean energy pro...Formaldehyde(HCHO)is a toxic by-product widely generated in industrial processes,presenting significant environmental and health risks.Utilizing solar energy to convert HCHO into hydrogen(H2)and other clean energy provides a sustainable solution for pollution control and energy demands.In this work,a highly active and low-cost CdS/NiO_(x) photocatalyst was synthesized in situ and applied for the photocatalytic HCHO decomposition.For the first time,simultaneous generation of H_(2) and CH_(4) was observed during the photocatalytic decomposition of formaldehyde.The optimal H2 evolution rate can reach up to 13 mmol·g^(-1)·h^(-1),with a CH_(4) production rate of 175μmol·g^(-1)·h^(-1) driven by visible light.The close contact between NiO_(x) and CdS facilitates rapid charge transfer and separation,leading to exceptional photocatalytic performance.Additionally,an apparent quantum yield(AQY)of 2.4%for H_(2) production at 420 nm indicates the high solar energy conversion efficiency of the CdS/NiO_(x) sample.This study presents a promising approach for the sustainable conversion of harmful formaldehyde into valuable energy resources.展开更多
基金financially supported by the National Natural Science Foundation of China(No.21871111)the Excellent Youth Foundation of Hubei Province of China(No.2019CFA078)。
文摘The complete decomposition of formaldehyde(HCHO) at ambient temperature is the most potential strategy for HCHO elimination from indoor environment.Herein,extra low content of Pt nanoparticles(0.025 wt%)supported on water-solubility carbon nitride/ceria(Pt/gC_(3)N_(4)@CeO_(2)) was prepared for gaseous HCHO removal at ambient temperature in a simulated indoor environment.Fluorescent light(8 W) illumination could visibly boost the complete decomposition of HCHO into CO_(2) over Pt/gC_(3)N_(4)@CeO_(2).The cooperative effect in the distinct heterostructure and plenty of surface reactive oxygen species contribute primarily to the enhanced catalytic performance of Pt/g-C_(3)N_(4)@CeO_(2).Moreover,the possible mechanism of HCHO oxidation over Pt/g-C_(3)N_(4)@CeO_(2) assisted by the fluorescent light irradiation was proposed based on the physicochemical and optical characterization as well as the result of in situ diffuse reflectance infrared Fourier transform spectra.This work might shed some light on the potential application of the versatile catalysts for ambient-temperature catalytic decomposition of HCHO by making full use of the indoor energies.
基金supported by the National Natural Science Foundation of China(Nos.22225108 and 52172053)the CAS Project for Young Scientists in Basic Research(No.YSBR-110)+2 种基金the Fundamental Research Funds for the Central Universities(No.WK2490000002)the GuangDong Basic and Applied Basic Research Foundation(No.2023A1515110930)the Hefei National Laboratory for Physical Sciences at Microscale.
文摘Formaldehyde(HCHO)is a toxic by-product widely generated in industrial processes,presenting significant environmental and health risks.Utilizing solar energy to convert HCHO into hydrogen(H2)and other clean energy provides a sustainable solution for pollution control and energy demands.In this work,a highly active and low-cost CdS/NiO_(x) photocatalyst was synthesized in situ and applied for the photocatalytic HCHO decomposition.For the first time,simultaneous generation of H_(2) and CH_(4) was observed during the photocatalytic decomposition of formaldehyde.The optimal H2 evolution rate can reach up to 13 mmol·g^(-1)·h^(-1),with a CH_(4) production rate of 175μmol·g^(-1)·h^(-1) driven by visible light.The close contact between NiO_(x) and CdS facilitates rapid charge transfer and separation,leading to exceptional photocatalytic performance.Additionally,an apparent quantum yield(AQY)of 2.4%for H_(2) production at 420 nm indicates the high solar energy conversion efficiency of the CdS/NiO_(x) sample.This study presents a promising approach for the sustainable conversion of harmful formaldehyde into valuable energy resources.
