Sonochemical Assisted Solvothermal Synthesis of Gallium Oxynitride Nanosheets and their Solar-Driven Photoelectrochemical Water-Splitting Applications.
Sonochemical Assisted Solvothermal Synthesis of Gallium Oxynitride Nanosheets and their Solar-Driven Photoelectrochemical Water-Splitting Applications.
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DOI：
10.1038/srep32319
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发表时间：
2016-08-26
影响因子：
4.6
通讯作者：
Qurashi A
中科院分区：
文献类型：
--
作者：
Iqbal N;Khan I;Yamani ZH;Qurashi A
采用直接溶剂热法合成了用于光电化学分析的氧化氮化镓（GaON）纳米片。他们的FE-SEM显示了在180°C下反应24小时制备的GaON纳米片的形貌。通过电子色散x射线能谱（EDX）对Ga、O和N的元素组成和作图进行了分析。用x射线衍射（XRD）分析了GaON纳米片的立方结构。x射线光电子能谱（XPS）进一步证实了Ga、O和N各自的比例和状态。通过紫外可见光谱、光致发光光谱和拉曼光谱对GaON纳米片的光学性能进行了评价。利用吸收光谱和漫反射光谱计算了~1.9 eV的带隙能量，发现Ga （3d）和N （2p）轨道具有较强的p-d斥力。这种效应和化学氮化作用导致价带上移和带隙减小。在一个标准的三电极系统中，在0.5 M Na2SO4的1次太阳照射下，研究了GaON纳米片的PEC研究。分别用计时电流法、线性扫描伏安法和循环伏安法观察了测量过程中的光电流产生、氧化和还原反应。因此，这些GaON纳米片可以用作太阳能水分解的潜在光催化剂。
Gallium oxynitride (GaON) nanosheets for photoelectrochemical (PEC) analysis are synthesized via direct solvothermal approach. Their FE-SEM revealed nanosheets morphology of GaON prepared at a reaction time of 24 hours at 180 °C. The elemental composition and mapping of Ga, O and N are carried out through electron dispersive X-ray spectroscopy (EDX). The cubic structure of GaON nanosheets is elucidated by X-ray diffraction (XRD)analysis. The X-ray Photoelectron Spectroscopy (XPS) further confirms Ga, O and N in their respective ratios and states. The optical properties of GaON nanosheets are evaluated via UV-Visible, Photoluminescence (PL) and Raman spectroscopy’s. The band gap energy of ~1.9 eV is calculated from both absorption and diffused reflectance spectroscopy’s which showed stronger p-d repulsions in the Ga (3d) and N (2p) orbitals. This effect and chemical nitridation caused upward shift of valence band and band gap reduction. The GaON nanosheets are investigated for PEC studies in a standard three electrode system under 1 Sun irradiation in 0.5 M Na2SO4. The photocurrent generation, oxidation and reduction reactions during the measurements are observed by Chronoampereometry, linear sweep Voltametry (LSV) and Cyclic Voltametry (CV) respectively. Henceforward, these GaON nanosheets can be used as potential photocatalyts for solar water splitting.
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影响因子：
41.2
作者：
Johnson, JC;Choi, HJ;Saykally, RJ
通讯作者：
Saykally, RJ
影响因子：
1.7
作者：
CARIN, R;DEVILLE, JP;WERCKMANN, J
通讯作者：
WERCKMANN, J
影响因子：
2.1
作者：
Kong, Lingyi;Ma, Jin;Lv, Yu
通讯作者：
Lv, Yu
DOI：
10.1143/jjap.21.94
发表时间：
1982-01-01
期刊：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
影响因子：
--
作者：
IWAKURO, H;TATSUYAMA, C;ICHIMURA, S
通讯作者：
ICHIMURA, S
影响因子：
3.9
作者：
APAI, G;FREDERICK, BG
通讯作者：
FREDERICK, BG