Balgude Sagar, Sethi Yogesh, Gaikwad Aarti, Kale Bharat, Amalnerkar Dinesh, Adhyapak Parag
Centre for Materials for Electronics Technology, Panchawati, Pashan Road, Pune 411008, India.
Nanoscale. 2020 Apr 21;12(15):8502-8510. doi: 10.1039/c9nr10439a. Epub 2020 Apr 3.
Unique N doped SnO nanosheets have been demonstrated successfully using a facile hydrothermal method. Investigations of the triclinic phase and the impurities were performed using powder X-ray diffraction analysis (XRD) and Raman spectroscopy. The morphological analysis demonstrated a rectangular intra- and inter-connected nanosheet-like structure. The length of the nanosheets was observed to be in the range of 200-300 nm and the thickness of the nanosheets was less than 10 nm. The optical study reveals an extended absorption edge into the visible region, owing to the incorporation of nitrogen into the lattice of SnO, which was further confirmed using X-ray photoelectron spectroscopy (XPS). Considering the band structure in the visible region, the photocatalytic activities of pristine and N doped SnO nanosheets for hydrogen evolution from water under natural sunlight were investigated. 4% N-SnO showed a higher photocatalytic activity (654.33 μmol h 0.1 g) for hydrogen production that was eight times that of pristine SnO. The enhanced photocatalytic activity is attributed to the inhibition of charge carrier separation owing to the N doping, morphology and crystallinity of the N-SnO nanostructures. A stable efficiency was observed for three cycles, which clearly shows the stability of N-SnO.
采用简便的水热法成功制备了独特的氮掺杂二氧化锡纳米片。利用粉末X射线衍射分析（XRD）和拉曼光谱对三斜相和杂质进行了研究。形态分析表明存在矩形的内部和相互连接的纳米片状结构。观察到纳米片的长度在200 - 300 nm范围内，纳米片的厚度小于10 nm。光学研究表明，由于氮掺入二氧化锡晶格，吸收边缘扩展到了可见光区域，这一点通过X射线光电子能谱（XPS）得到了进一步证实。考虑到可见光区域的能带结构，研究了原始和氮掺杂二氧化锡纳米片在自然阳光下从水中析氢的光催化活性。4%氮掺杂的二氧化锡（4% N - SnO）表现出较高的光催化产氢活性（654.33 μmol h⁻¹ 0.1 g），是原始二氧化锡的八倍。光催化活性的增强归因于氮掺杂、N - SnO纳米结构的形态和结晶度对电荷载流子分离的抑制作用。在三个循环中观察到了稳定的效率，这清楚地表明了N - SnO的稳定性。
