Epitaxial growth of bismuth oxyhalide thin films using mist CVD at atmospheric pressure

Abstract

<p>We report epitaxial growth of bismuth oxyhalides BiO<italic>X</italic>s (<italic>X</italic> = Cl, Br, and I) thin films with mist chemical vapour deposition at atmospheric pressure. The thin films grown at optimum...</p>

Efficient p–n Heterojunction Photocatalyst Composed of Bismuth Oxyiodide and Layered Titanate

“…In addition to the facet engineering, the size of BiOI was controlled by the interactions with the layered titanate. Chemical vapor deposition (CVD) has been applied to grow BiOI nanoplatelet films on substrates, where the deposition temperature is a crucial factor affecting the size and crystallinity of BiOI. , Recently, clay minerals were employed as a template to prepare nanosized BiOI with the help of polyvinylpyrrolidone and mannitol under a hydrothermal treatment . If compared with smectite clays, which are normally photocatalytic inactive, CsTLO is a more interesting counterpart of BiOXs for photocatalytic applications.…”

“…In addition, the present BiOI nanodisk is composed of approximately seven nanosheets of BiOI, which is comparable to those BiOI thin films obtained by CVD. 21,23 The thickness of the nanodisk was quite thin if compared to that of bulk BiOI (70−120 nm, Figure S3), 11,32 providing a short diffusion distance of the charges to reach the catalyst's surface rapidly and then catalyze substances. Therefore, the present p−n heterojunction with a wellmatched lattice and a manipulated electron pathway could offer an archetype for design high-performance photocatalysts based on layered titanate.…”

“…Therefore, lattice matching between BiOI and its counterparts should be considered to achieve an efficient heterojunction. Recently, (001) faceted BiOI thin film was epitaxially grown on (001) facet of SrTiO 3 [(001)­SrTiO 3 //(001)­BiOI] using chemical vapor deposition, where the lattice mismatch is 2.3% . (002)­ZnO//(111)­BiOI and (011)­ZnWO 4 //(001)­BiOI with lattice mismatches of 0.76 and 4.4% showed efficient photodegradation of organics. , Thus, seeking a counterpart of BiOI with a well-matched lattice and band gap is a way to design the useful hybrid materials.…”

One-Step Rapid Deposition of Bi2S3 Thin Film and Comprehensive Study of Its Photoelectrochemical Activity

“…Moreover, metastable reagents can be used as a precursor because mist droplets are easily evaporated and gasified with small energy under the air. Up till now, high-quality thin films with controllable thickness and morphology comparable to that of films grown with vacuum-based techniques have been achieved with mist CVD by fine optimization of the deposition conditions. , Owing to the advantages mentioned above, mist CVD was adopted for the direct deposition of Bi 2 S 3 thin films on polycrystalline conducting glass at various temperatures via using BiCl 3 and thiourea as precursors in this study. The morphology and crystallinity of Bi 2 S 3 thin films were highly dependent on the synthesis temperatures.…”

“…Up till now, high-quality thin films with controllable thickness and morphology comparable to that of films grown with vacuum-based techniques have been achieved with mist CVD by fine optimization of the deposition conditions. 32,33 Owing to the advantages mentioned above, mist CVD was adopted for the direct deposition of Bi 2 S 3 thin films on polycrystalline conducting glass at various temperatures via using BiCl 3 and thiourea as precursors in this study.…”