Karmakar Himadri Shekhar, Sarkar Ayan, Ghosh Nani Gopal, Sanke Devendra Mayurdhwaj, Kumar Chandan, Das Sarasija, Zade Sanjio S
Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, Nadia, West Bengal, 741246, India.
Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, Nadia, West Bengal, 741246, India.
Chemosphere. 2022 Aug;301:134696. doi: 10.1016/j.chemosphere.2022.134696. Epub 2022 Apr 27.
In the work reported in this article, we have coupled Ti-self-doped TiO nanorods (NRs) with a newly synthesized tetrathiophene coupled perylene-based molecule (tThTMP) to form type-II inorganic/organic nanoheterostructures (NHs) for visible-light-driven water oxidation. The small organic molecule helps in better utilizing a wide range of the visible light spectrum, facilitates a faster delocalization of the photogenerated carriers at the inorganic/organic heterojunction, and exhibits improved photoelectrochemical performances. We have further decorated the NHs with platinum nanoparticles (NPs). The decoration of the Pt NPs significantly augments the various aspects of photoelectrochemical performances. The Pt NPs decorated NHs photoanode exhibits a photocurrent density of 0.83 mA/cm at 1.23 V vs. RHE (@10 mV/s scan rate), a photoconversion efficiency of 0.26%, a substantial cathodic shift in the water oxidation onset potential and flat band potential, impressively reduced charge transfer resistance, improved photocarrier concentration, photovoltage, and stability.
在本文报道的工作中，我们将钛自掺杂的二氧化钛纳米棒（NRs）与新合成的四噻吩偶联苝基分子（tThTMP）耦合，形成用于可见光驱动水氧化的II型无机/有机纳米异质结构（NHs）。这种小分子有助于更好地利用宽范围的可见光谱，促进光生载流子在无机/有机异质结处更快地离域，并展现出改善的光电化学性能。我们进一步用铂纳米颗粒（NPs）修饰了这些NHs。铂纳米颗粒的修饰显著增强了光电化学性能的各个方面。修饰有铂纳米颗粒的NHs光阳极在相对于可逆氢电极（RHE）为1.23 V（扫描速率为10 mV/s）时的光电流密度为0.83 mA/cm²，光电转换效率为0.26%，水氧化起始电位和平带电位有显著的阴极偏移，电荷转移电阻显著降低，光载流子浓度、光电压和稳定性得到改善。
