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Tianpeng Yu,Lixi Wang,Xiaojuan Yang,Wenhao Ding,Qitu Zhang 대한금속·재료학회 2019 ELECTRONIC MATERIALS LETTERS Vol.15 No.1
In this paper, green-blue emitting Sr 2 SiO 4 (SSO):0.03Tb 3+ , x Ce 3+ ( x = 0–0.005) materials were synthesized via a solid-statereaction method. The crystal structures, luminescence properties, decay time, and thermal stability were measured in thiswork. The as-prepared phosphors exhibit both an indigo emission of Ce 3+ and green emission of Tb 3+ with considerableintensity ( λ ex = 300 nm). Tb 3+ ion emission was intensifi ed obviously with co-doping Ce 3+ . The luminescence spectra ofSr 2 SiO 4 (SSO):0.03Tb 3+ , Ce 3+ shows characteristic line of Tb 3+ ion transition ( 5 D 4 → 7 F 5 ). Tunable green-blue color canbe obtained by the addition of Ce 3+ ions. An eff ective energy transfer process between Tb 3+ and Ce 3+ was supposed andconfi rmed from decay curves. In addition, the energy transfer mechanism from Ce 3+ to Tb 3+ ions in the Sr 2 SiO 4 (SSO) hostis electric multipolar interaction. Sr 2 SiO 4 (SSO):Tb 3+ , Ce 3+ phosphor exhibits good thermal stability, the quantum yield wasabout 43.67%, indicating a potential candidate for solid-state lighting.
Tianpeng Wen,Lei Yuan,Chen Tian,Yao Jin,Tao Liu,Jingkun Yu 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-
A new strategy for preparing a novel CaO-Al2O3 auxiliary electrode coating for sulfur sensor by infiltratingCa2+ and Al3+ into the porous ZrO2(MgO) backbone was proposed in this work. The phase composition andmicrostructure of the auxiliary electrode was detected and correlated to the electrochemical performance,while the application of the sulfur sensor in the liquid iron was presented. It is demonstrated thatthe CaO-Al2O3 particles were homogenously coated on the ZrO2(MgO) backbone and formed well connectednetwork, which could effectively improve the reaction area between CaO-Al2O3 and [S] as wellas enhancing the ionic conductivity and bonding strength of the auxiliary electrode. The assembled sulfursensor possessed a superior sensing performance of theoretical response, simultaneously the Nernst relationshipbetween the sensor EMF output and the linearity of the sulfur concentration occurred along withthe stable, continuous, and reproducible response.
Wen Tianpeng,Yuan Lei,Yan Zhengguo,Jin Yao,Liu Zhaoyang,Yu Jingkun 한국물리학회 2022 Current Applied Physics Vol.39 No.-
The present work looked at the co-doping effect of the typical trivalent metal oxides on the electrochemical performance of 8 mol% of MgO stabilized ZrO2 (Mg-PSZ) electrolyte ceramics used for oxygen sensors. An appreciable increase in the ionic conductivity occurred on substituting MgO with trivalent metal oxides except La2O3 in the Mg-PSZ electrolyte ceramics across the measured temperature range. The conductivity was related to the co-dopant ionic radius and the ionic conductivity increased with the co-dopant ionic radius of the trivalent metal oxides, reached a maximum at about 1.02 Å, and thereafter decreased. Through comparison and analysis, the Y2O3 exhibited excellent superiority than other trivalent metal oxides and the oxygen sensor assembled by 1Y7Mg-PSZ electrolyte possessed more excellent response speed and stability.
Kaihang Wang,Kaili Sun,Zihan Li,Zunhang Lv,Tianpeng Yu,Xin Liu,Guixue Wang,Guangwen Xie,Luhua Jiang 대한금속·재료학회 2020 ELECTRONIC MATERIALS LETTERS Vol.16 No.2
The development of electrocatalysts with high activity and low Tafel slope for overall water splitting has become a crucialchallenge to exploit the sustainable energy. Herein, we construct a Fe–Co–P–Gr catalyst on nickel foam (NF) support throughelectroless composite plating to realize the co-deposition of Fe–Co–P alloys and graphene quantum dots. Interestingly,graphene quantum dots exhibit obvious eff ects on electron mobility and active sites of Fe–Co–P–Gr/NF catalyst. In oxygenevolution reaction, the Fe–Co–P–Gr/NF catalyst exhibits a small overpotential of 230 mV at 10 mA cm −2 and fast kineticswith Tafel slope of 37.8 mV dec −1 . Meanwhile, the Fe–Co–P–Gr/NF also has a superior hydrogen evolution reaction performancein 1.0 M KOH. Compared with the Fe–Co–P alloys, the Fe–Co–P–Gr/NF both as the anode and cathode requireonly 1.58 V to reach a current density of 10 mA cm −2 . The successful preparation of Fe–Co–P–Gr/NF electrode throughelectroless composite deposition provides a new path to manufacture electrocatalysts for overall water splitting.