Carbon quantum dots/TiO2 composites for efficient photocatalytic hydrogen evolution

A selective sensor for cyanide ion (CN−) based on the inner filter effect of metal nanoparticles with photoluminescent carbon dots as the fluorophore

“…Very recently, we proposed to prepare photoluminescent carbon dots from one-pot hydrothermal treatment of bee pollen in a highly reproducible way [8]. Apart from synthesis, the carbon dots are used for sensing of metal ions [9], optical bioimaging [10], photocatalysis [11], and photo-induced electron transfer (PET) [12]. Few studies on the detection of toxic anions based on carbon dots have been conducted [13][14][15].…”

Carbon Quantum Dots: A Component of Efficient Visible Light Photocatalysts

“…These sensitized electrons then reacted with O 2 adsorbed on TiO 2 surface to produce active oxygen radicals (O 2 − ), which were responsible for the observed MB degradation. In another case, Yu et al [47] reported the efficient photocatalytic H 2 evolution activity of CQDs/P25 composite under both UV-vis and visible light (λ > 450 nm) irradiation without the aid of any noble metal cocatalyst. Different from pure P25, CQDs/P25 exhibited visible light-driven photocatalytic activity for H 2 production, ascribing to the photosensitizing ability of CQDs.…”

Towards efficient photoinduced charge separation in carbon nanodots and TiO2 composites in the visible region

“…[9][10][11][12][13][14][15] The electron injection from CDs to TiO 2 was demonstrated to be feasible and the CD-sensitized TiO 2 photoelectrodes have been applied in photocatalysis and PVs. 10,[16][17][18][19][20][21] However, it is still a challenge to achieve efficient electron injection from CDs to TiO 2 under sunlight, 21 which is a primary photophysical process in generating photocurrent in CD-based PVs. 22,23 To date, the power conversion efficiency of CD-based PVs has been only 0.13%, as reported by Mirtchev and co-workers.…”