Novel NiWO₄ nanoberries morphology effect on photoelectrochemical properties

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>We report a novel method to synthesis NiWO<SUB>4</SUB> nanoberries and their morphology dependent photoelectrochemical properties. XRD result revealed monoclinic wolframite NiWO<SUB>4</SUB> structure formation. FESEM and TEM showed average particle and nanoberries size of 4 and 50 nm respectively. Raman active stretching W–O vibration mode at 889 cm<SUP>−1</SUP>, PL blue green emission of intrinsic WO<SUB>6</SUB> <SUP>6−</SUP> complex with double emission center (3T<SUB>1u</SUB>-1A<SUB>1g</SUB>) and FTIR spectrum confirmed NiWO<SUB>4</SUB> formation with a calculated band gap of 2.86 eV. The much higher photocurrent of 0.03 mA/cm<SUP>2</SUP> was obtained at 0 V potential under visible light due to higher band gap (2.86 eV) of nanoberries morphology which led to efficient light absorption and increase in electron and hole separations.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Novel synthesis of NiWO<SUB>4</SUB> nanoberries morphology. </LI> <LI> Higher photocurrent of 0.03 mA/cm<SUP>2</SUP> due to higher band gap 2.86 eV. </LI> <LI> Nanoberries morphology led to absorption, increase electron hole separations. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Graphical abstract clearly shows the schematic representation of nanoberries formation which is evident that the effect of surfactant for the formation of a big berry contains number of small berries.</P> <P>[DISPLAY OMISSION]</P>