Defective ZnIn2S4 nanosheets/mesoporous black
TiO2 heterojunction hollow spheres (H-ZIS/b-TiO2) are prepared through hydrothermal and surface low-temperature hydrogenation
strategies, which show broad-spectrum response and excellent charge
separation efficiency. This H-ZIS/b-TiO2 flower-like heterojunction
hollow spheres with a narrow band gap of ∼1.88 eV expand the
light response to visible light and show excellent photocatalytic
hydrogen evolution rate (278 μmol h–1 50 mg–1) under visible-light irradiation, which is 1.5 times
as high as that of ZnIn2S4/black TiO2 heterojunction hollow spheres (ZIS/b-TiO2) (181 μmol
h–1 50 mg–1). The excellent photocatalytic
performance is due to the formation of O, S dual vacancies in b-TiO2 and H-ZIS providing more active sites for photocatalytic
reaction and improving the charge separation efficiency, heterojunctions
promoting transport of photogenerated carriers, and the hollow structure
increasing light utilization by reflecting light. The novel heterojunction
hollow sphere with high performance has broad application prospects
in the field of energy.
We, herein, firstly indicated the Rnase activities of LbCas12a on linear ssRNA above 11 bases, and hairpin RNA substrates. Meanwhile, the LbCas12a binding to ssDNA or ssRNA exhibited different cleavage...
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