http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Xipeng Pu (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Li, Huaiyong,Pu, Xipeng,Yao, Shujuan,Wang, Xiaoqing,Noh, Hyeon Mi,Jeong, Jung Hyun American Scientific Publishers 2016 Journal of Nanoscience and Nanotechnology Vol.16 No.4
<P>Y6MoO12 doped with Eu3+ was synthesized using a citrate-complexation route, and was calcined at 800 degrees C and 1400 degrees C, respectively. The structure, morphology and photoluminescence (PL) properties of the samples, and their dependence on the crystallite size were investigated. XRD patterns indicate that the Y6MoO12:Eu3+ powder was obtained at both calcination temperatures, and had a cubic structure. The results also suggest that Y6MoO12:Eu3+ calcined at 800 degrees C was in the nanocrystalline phase, which was confirmed by the SEM microimage. The crystalline size was about 140 nm. Both phosphors could be excited via three channels: f-f excitation of Eu3+ by blue light, MoO groups excitation by near-UV light, and charge transfer state excitation of Eu3+ by UV light. Both samples yielded red light emissions dominated by the D-5(0)-F-7(2) transition at 613 nm. The excitation efficient of the three channels depended on the calcination temperature. The energy transfer from the MoO groups to the Eu3+ ions was more effective in the nanocrystalline phase. The temporal decay feature of the phosphor was also characterized.</P>
-
Jiang, Zehan,Cai, Peiqing,Chen, Cuili,Pu, Xipeng,Kim, Sun Il,Jin Seo, Hyo Elsevier 2017 Materials chemistry and physics Vol.193 No.-
<P><B>Abstract</B></P> <P>Eu<SUP>3+</SUP>-doped NaGd(WO<SUB>4</SUB>)<SUB>2</SUB> nanophosphors were synthesized via a facile one-step hydrothermal method without any surfactants or a further heat treatment. X-ray powder diffraction (XRD), scanning electron microscope (SEM), fourier transform infrared spectroscopy (FT-IR), the photoluminescence (PL) excitation and emission spectra, and decay curves were used to characterize NaGd(WO<SUB>4</SUB>)<SUB>2</SUB>:Eu<SUP>3+</SUP> phosphors. The results show that the Eu<SUP>3+</SUP>-concentration has little influence on the structure and morphology of the as-synthesized samples. However, pH value plays a vital role on the structure and morphology of NaGd(WO<SUB>4</SUB>)<SUB>2</SUB>. The well-crystallized sheet-like NaGd(WO<SUB>4</SUB>)<SUB>2</SUB> phosphors can be obtained only at pH = 5–7. On the basis of the time-dependent synthesis, a possible growth mechanism of sheet-like architectures is proposed. The luminescence properties of NaGd<SUB>1-x</SUB>Eu<SUB>x</SUB>(WO<SUB>4</SUB>)<SUB>2</SUB> (0 ≤ x ≤ 1) are investigated. It is found that the charge transfer band of Eu<SUP>3+</SUP> shifts to lower energy and broadens with increasing the Eu<SUP>3+</SUP>-concentration.</P> <P><B>Highlights</B></P> <P> <UL> <LI> NaGd(WO<SUB>4</SUB>)<SUB>2</SUB>:Eu<SUP>3+</SUP> nanosheets were synthesized by facile one-step hydrothermal method. </LI> <LI> Luminescence properties of NaGd(WO<SUB>4</SUB>)<SUB>2</SUB>:Eu<SUP>3+</SUP> phosphor were firstly reported. </LI> <LI> The CT band of Eu<SUP>3+</SUP> depends strongly on Eu<SUP>3+</SUP>-concentrations. </LI> </UL> </P>
-
Zhengmin Yu,Xiaoli Su,Denghu Wei,Shu-Juan Yao,Huiyan Ma,Hui Zhao,Xipeng Pu,Wenzhi Li,Jie Wang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.4
3D structure composite made of tiny basic nickel carbonate arrays on the surface of reduced graphene oxide nanosheets (G-NiCH) are prepared by the hydrothermal method. The specific surface area of the G-NiCH composites is twice that of single basic nickel carbonate, which is due to the tiny basic nickel carbonate arrays structure wherein each individual nanoneedle is about 20 nm in length and 2 nm in width. The G-NiCH electrodes display high-efficiency electrochemical performance with good specific capacitance (1230 F g -1) and excellent stability (100% capacitance retention after 2000 cycles). This is attributed to the synergistic effect that reduced graphene oxide offer fast electron transmission path and basic nickel carbonate act as high effective active material.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
