Rani B Jansi, Praveenkumar M, Ravichandran S, Ravi G, Guduru Ramesh K, Yuvakkumar R
Nanomaterials Laboratory, Department of Physics, Alagappa University, Karaikudi 630003, Tamil Nadu, India.
Electro Inorganic Division, CSIR-Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi 630003, Tamil Nadu, India.
J Nanosci Nanotechnol. 2019 Nov 1;19(11):7427-7435. doi: 10.1166/jnn.2019.16642.
We reported a simple and economical SDS (sodium dodecyl sulfate) assisted BiVO₄ solvothermal synthesis of BiVO₄ nanostructures. The implementation of pristine and SDS assisted BiVO₄ nanostructure as photoanode in photoelectrochemical (PEC) water splitting was investigated. The good crystalline nature, defects present in the material, recombination nature and vibrational properties of the synthesized BiVO₄ nanostructures have been analyzed and confirmed by XRD, Raman, PL and FTIR studies. The constructed nanoflower oriented morphology combined with nanorods for SDS assisted BiVO₄ have been examined by SEM studies. The optical band gap differences were observed as 2.35 and 2.31 eV for pristine and SDS assisted BiVO₄ nanostructures respectively. The higher photocurrent density of 5.8 A/cm² at 0.5 V versus RHE with lower flat band potential of -0.75 V revealed for SDS assisted BiVO₄ nanostructured photoanodes. Good conductivity, higher charge separation efficiency and 52% photocurrent retention under illumination was reported over 7200 s for the same efficient photoanode. These results suggested the substantial possibility of BiVO₄ nanostructures synthesized by using SDS surfactant could be utilized as efficient photoanodes for PEC water splitting applications.
我们报道了一种简单且经济的十二烷基硫酸钠（SDS）辅助的BiVO₄溶剂热合成BiVO₄纳米结构的方法。研究了原始的和SDS辅助的BiVO₄纳米结构作为光阳极在光电化学（PEC）水分解中的应用。通过X射线衍射（XRD）、拉曼光谱（Raman）、光致发光（PL）和傅里叶变换红外光谱（FTIR）研究，分析并证实了合成的BiVO₄纳米结构的良好晶体性质、材料中存在的缺陷、复合性质和振动特性。通过扫描电子显微镜（SEM）研究，考察了SDS辅助的BiVO₄所构建的纳米花取向形态与纳米棒相结合的情况。原始的和SDS辅助的BiVO₄纳米结构的光学带隙差异分别观察为2.35和2.31电子伏特。对于SDS辅助的BiVO₄纳米结构光阳极，在相对于可逆氢电极（RHE）为0.5伏时，显示出更高的光电流密度5.8毫安/平方厘米，且具有更低的平带电位-0.75伏。对于同一高效光阳极，报道了其具有良好的导电性、更高的电荷分离效率以及在光照下7200秒内52%的光电流保持率。这些结果表明，使用SDS表面活性剂合成的BiVO₄纳米结构有很大可能性被用作PEC水分解应用的高效光阳极。
