Tin sulfide (SnS) nanoribbons with the thickness of ca. 10-20 nm and length up to several microns were synthesized via a facile polyol refluxing process. The photoconductive properties of the SnS nanoribbons were tested by assembling the samples into photoelectrochemical (PEC) cells, exhibiting excellent photosensitivity with the features of rapid response and recover time, and stable on/off cycle performance to the stimulated sunlight. The photocurrent density can reach to around 87 mA cm 22 , which is the highest one among all reported SnS photoelectrodes. Flexible photodetectors were then fabricated on PET substrates, showing fast response to visible light with different intensities. Photocatalytic properties of the as-synthesized SnS nanoribbons were also studied by photocatalytic degradation of methylene blue (MB). Almost all of MB was decomposed within 2 h, indicating the SnS nanoribbons are good candidates for high performance photocatalysts.

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SnO 2 has been confirmed to be a potential sensor to many toxic volatile gases. We report here the synthesis of porous SnO 2 nanoflowers by in situ oxidization of SnS and SnS 2 precursors with similar morphologies. The as-synthesized SnO 2 products were characterized by FESEM, XRD, TEM, UVvis spectrometry, fluorescence spectrometry and the nitrogen adsorption-desorption technique. Configured as resistor-type chemical sensors, the as-synthesized SnO 2 products exhibited excellent sensitivity and fast response/recovery times towards different gases including ethanol, methanol, methanal and acetone. After Pt nanoparticles were loaded, their sensing properties were dramatically increased, indicating their promising applications in detecting toxic volatile organic materials.