The combination of interface engineering and defect engineering is a promising strategy for developing new semiconducting surface-enhanced Raman scattering(SERS)substrate.Herein,an organic/inorganic hybrid g-C_(3)N_(4...The combination of interface engineering and defect engineering is a promising strategy for developing new semiconducting surface-enhanced Raman scattering(SERS)substrate.Herein,an organic/inorganic hybrid g-C_(3)N_(4)/TiO_(2-X)heterojunction with synchronous generation of strong interface effect and abundan surface oxygen vacancy(OV)defect was prepared by a simple sol-hydrothermal procedure with a help of urea.Due to the improved substrate-to-molecule charge transfer(CT)from joint contribution of high efficiency carrier separation induced by strong interface coupling effect and multiple CT paths derived from abundant surface OV,g-C_(3)N_(4)/TiO_(2-X)substrate exhibits greatly enhanced SERS effect for non-resonan4-mercaptobenzoic acid(4-MBA)probe.The enhancement factor of g-C_(3)N_(4)/TiO_(2-X)substrate for 4-MBA i as high as 5.57×10^(6),and the substrate exhibits ultra-high stability and excellent spectral reproducibility More meaningfully,the developed g-C_(3)N_(4)/TiO_(2-X)heterojunction can be used to execute an ultrasensitive detection for antibiotic residues in real water system,even comprehensive evaluation of multi-componen residues.展开更多
基金supported by National Natural Science Foundation of China(Nos.21804054,21773080)Natural Science Foundation of Heilongjiang Province of China for Distinguished Young Scholars(No.JQ2019B002)Scientific Research Project of Qiqihar University(Nos.130412223001,130412223002)。
文摘The combination of interface engineering and defect engineering is a promising strategy for developing new semiconducting surface-enhanced Raman scattering(SERS)substrate.Herein,an organic/inorganic hybrid g-C_(3)N_(4)/TiO_(2-X)heterojunction with synchronous generation of strong interface effect and abundan surface oxygen vacancy(OV)defect was prepared by a simple sol-hydrothermal procedure with a help of urea.Due to the improved substrate-to-molecule charge transfer(CT)from joint contribution of high efficiency carrier separation induced by strong interface coupling effect and multiple CT paths derived from abundant surface OV,g-C_(3)N_(4)/TiO_(2-X)substrate exhibits greatly enhanced SERS effect for non-resonan4-mercaptobenzoic acid(4-MBA)probe.The enhancement factor of g-C_(3)N_(4)/TiO_(2-X)substrate for 4-MBA i as high as 5.57×10^(6),and the substrate exhibits ultra-high stability and excellent spectral reproducibility More meaningfully,the developed g-C_(3)N_(4)/TiO_(2-X)heterojunction can be used to execute an ultrasensitive detection for antibiotic residues in real water system,even comprehensive evaluation of multi-componen residues.
