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[Display omitted] • Large-scale Bi 2 O 3 /Ag/TiO 2 nanotubes (BAT NTs) were successfully synthesized through the facile solution process at room temperature. • BAT NTs ultraviolet photodetector (UVPD) exhibits satisfactory photodetection performance with a fast response speed of 25 ms. • BAT NTs UVPD features excellent environmental stability after 1 month and cycling stability for 100 switching cycles. • BAT NTs UVPD achieves high-resolution imaging results with "UV" pattern and performs precise UV optical communication under zero bias. Large-scale Bi 2 O 3 /Ag/TiO 2 nanotubes (BAT NTs) were successfully synthesized using ZnO nanorods template through the facile solution process at room temperature. Highly ordered BAT NTs with an average diameter of approximately 300 nm were arranged hierarchically on the overall ITO substrate. In addition, a self-powered UV photodetector (UVPD) based on BAT NTs was assembled and the photoresponse characteristics were investigated under a wide range of UV light intensity. The BAT NTs UVPD exhibits satisfactory UV photodetection performance with detectivity of 1.55 × 1010 Jones and on/off ratio exceeding 103, associated with a fast response speed of 25 ms, which is ascribed to the efficient carrier transport inspired by the 1D structure and energy band structure. In addition, BAT NTs UVPD also features excellent environmental stability and long cycling stability. Benefitting from the desirable properties, the BAT NTs UVPD achieves high-resolution imaging results with "UV" pattern as a single pixel unit and performs accurate UV optical communication as a signal receiver at zero bias. Eventually, the detailed self-powered UV detection mechanism for BAT NTs UVPD was illustrated. [ABSTRACT FROM AUTHOR]

PbSe nanotubes (NTs) were synthesized through a low cost, facile and green hydrothermal route in combination with the assistance of ascorbic acid. In the hydrothermal reaction process, Se nanowires were not only used as templates, but also as a Se ion source to provide Se precursors for the growth of PbSe NTs. The prepared tubular crystals with a cubic structure have a length of 1–6 μm and an average diameter of ∼120 nm. Experimental results show that the amount of ascorbic acid and Pb2+ concentration play important roles in the formation of PbSe NTs, and a possible growth mechanism of PbSe NTs has also been presented. Additionally, the photocatalytic activity of the PbSe NTs was investigated and the results establish that PbSe NTs, in the presence of H2O2, showed a high photodegradation efficiency for methylene blue (MB). A probable photocatalytic mechanism for PbSe NTs is also discussed. [ABSTRACT FROM AUTHOR]

[Display omitted] • Large-scale Bi 2 O 3 nanotubes (NTs) arrays were successfully synthesized on ITO substrate employing ZnO nanorods. • An ultraviolet photodetector based on Bi 2 O 3 NTs was fabricated to show fast response speed and good cycling stability. • Bi 2 O 3 NTs ultraviolet photodetector could realize accurate UV detection free of external power. Large-scale Bi 2 O 3 nanotubes (NTs) arrays were successfully synthesized on ITO substrate with the assistance of ZnO nanorods template at room temperature. The as-synthesized highly orientated Bi 2 O 3 NTs with an average diameter of ∼95 nm were well distributed throughout the entire substrate. Moreover, Bi 2 O 3 NTs were employed to construct the ultraviolet photodetector (UVPD). Received to UV irradiation, the Bi 2 O 3 NTs UVPD displayed a high average current density of 40.4 μA/cm2, coupled with fast average rise time of ∼28.8 ms and decay time of ∼40.9 ms. Furthermore, the Bi 2 O 3 NTs UVPD could carry out accurate UV detection without external bias as well as maintain good stability and repeatability. Additionally, the UV detection mechanism of the as-assembled Bi 2 O 3 NTs UVPD was also discussed. [ABSTRACT FROM AUTHOR]

• Scaly-like hollow SnSe nanotubes (NTs) were synthesized by a green and rapid solution method. • Light utilization efficiency is improved due to unique scaly-like hollow structure and large surface area of the SnSe NTs. • SnSe NTs infrared photodetector can realize efficient and stable IR light detection free of the external power. [Display omitted] SnSe nanotubes (NTs) have been successfully synthesized via a simple solution method. The as-synthesized tubular crystals with orthorhombic structure are composed of numerous scaly nanosheets which distributed hierarchically. The average diameter of the SnSe NTs is roughly 180 nm and length primarily concentrate in the range of 1–3 µm. It was found that Se nanowires were served as a template and as an only source of Se ion for the formation of SnSe NTs. Furthermore, a novel self-powered infrared photodetector (IRPD) established on the SnSe NTs with desirable detection performance was fabricated. Exposed to IR illumination of 830 nm, the SnSe NTs IRPD displays a maximal photocurrent density of 46.46 nA/cm2 and a rapid photoresponse, together with the rise time and decay time approach up to 0.174 s and 0.349 s, respectively. Meanwhile, it can be recognized that the SnSe NTs IRPD remain consistent and repeatable at zero voltage. Moreover, a plausible mechanism for IR detection based on the SnSe NTs IRPD are also discussed. [ABSTRACT FROM AUTHOR]