The luminescence properties of CaBPO 5: Eu, Tb phosphor and the sensitization of Ce 3+ were investigated. The CaBPO 5: Eu, Tb phosphors were synthesized in the ambient air and the emission spectra of Eu 3+ ...The luminescence properties of CaBPO 5: Eu, Tb phosphor and the sensitization of Ce 3+ were investigated. The CaBPO 5: Eu, Tb phosphors were synthesized in the ambient air and the emission spectra of Eu 3+ , Tb 3+ and Eu 2+ were observed in the phosphor. The result shows that there is electron transfer between conjugate rare earth ions. Sensitization of Ce 3+ can improve the intensity of emission of Tb 3+ and Eu 2+ . A novel trichromatic lamp phosphor codoped with Eu 3+ Tb 3+ in matrix CaBPO 5 is then predicted.展开更多
CeO_(x)as a(co-)catalyst has been proved a promising material toward the oxygen evolution reaction(OER)in water splitting.In this study,a novel two-step method for the synthesis of cerium oxide nanoparticles in-situ g...CeO_(x)as a(co-)catalyst has been proved a promising material toward the oxygen evolution reaction(OER)in water splitting.In this study,a novel two-step method for the synthesis of cerium oxide nanoparticles in-situ generatedon CoP nanosheets toward OER is presented.Interestingly,Ce ions were gradually hydrolyzed and oxidized under the action of alkaline ligand andsolvothermal environment,and eventually existed in the form of CeO_(x)on the 2D Co-MOF nanosheets in the first step.In the followed selective phosphating process,2D Co-MOF nanosheets act as the template are transformed into CoP nanosheets but CeO_(x)is still maintained.Optimal CeO_(x)/CoP nanosheets exhibit low OER overpotential,small Tafel slope and robust durability.Furthermore,in situ electrochemical Raman spectroscopy demonstrates the transformation of the active catalytic species during the oxidation process.This in situ generation of a cocatalyst and selective phosphidation strategy provides some guidelines for the designing of highly efficient catalysts for OER and even other explorations.展开更多
基金Project supported by the Key Laboratory of Inorganic Synthesis of Jilin University(990 2)the Education Department of Guangdong Province
文摘The luminescence properties of CaBPO 5: Eu, Tb phosphor and the sensitization of Ce 3+ were investigated. The CaBPO 5: Eu, Tb phosphors were synthesized in the ambient air and the emission spectra of Eu 3+ , Tb 3+ and Eu 2+ were observed in the phosphor. The result shows that there is electron transfer between conjugate rare earth ions. Sensitization of Ce 3+ can improve the intensity of emission of Tb 3+ and Eu 2+ . A novel trichromatic lamp phosphor codoped with Eu 3+ Tb 3+ in matrix CaBPO 5 is then predicted.
基金National Natural Science Foundation of China(21871121)the 111 Project(B20027).
文摘CeO_(x)as a(co-)catalyst has been proved a promising material toward the oxygen evolution reaction(OER)in water splitting.In this study,a novel two-step method for the synthesis of cerium oxide nanoparticles in-situ generatedon CoP nanosheets toward OER is presented.Interestingly,Ce ions were gradually hydrolyzed and oxidized under the action of alkaline ligand andsolvothermal environment,and eventually existed in the form of CeO_(x)on the 2D Co-MOF nanosheets in the first step.In the followed selective phosphating process,2D Co-MOF nanosheets act as the template are transformed into CoP nanosheets but CeO_(x)is still maintained.Optimal CeO_(x)/CoP nanosheets exhibit low OER overpotential,small Tafel slope and robust durability.Furthermore,in situ electrochemical Raman spectroscopy demonstrates the transformation of the active catalytic species during the oxidation process.This in situ generation of a cocatalyst and selective phosphidation strategy provides some guidelines for the designing of highly efficient catalysts for OER and even other explorations.
