CQDs/biochar from reed straw modified Z-scheme MgIn2S4/BiOCl with enhanced visible-light photocatalytic performance for carbamazepine degradation in water

Functional carbon dots derived from biomass and plastic wastes

“…The obtained CDs showed a uniform spherical morphology with a diameter ranging between 2-4 nm and demonstrated a blue dispersion under UV light irradiation. Xie et al 108 reported a pyrolysis and hydrothermal method to synthesize CDs from reed straw, and the obtained CDs ranged from 5 to 10 nm. They pyrolyzed reed straws at a low oxygen concentration and 500 °C for 5 h, followed by heating using a hydrothermal method at 200 °C for 4 h. The collected supernatant was dialyzed to obtain bright yellow CDs solutions.…”

Recent progress on van der Waals heterojunctions applied in photocatalysis

“…On the contrary, photocatalytic technology has the advantages of no secondary pollution, fast reaction speed and high degradation efficiency, so it is considered as a "green" means to deal with the degradation of pollutants. 166,167 The main mechanism of the photodegradation of pollutants is that the catalyst is irradiated by light, absorbs light energy, undergoes electron transition, forms electron-hole pairs, facilitates redox reactions of the pollutants adsorbed on the surface directly, or oxidizes the hydroxyl (ÀOH) groups adsorbed on the surface to form strongly oxidizing hydroxide free radicals (cOH) that oxidize the pollutants. 168 However, the photodegradation performance is oen affected by optical absorption and charge separation.…”

Progress on the luminescence mechanism and application of carbon quantum dots based on biomass synthesis

“…With their good properties, biomass materials have been widely used as precursors to prepare biomass CQDs. CQDs made from biomass materials have excellent luminescence properties, biocompatibility, photostability, low toxicity and many other advantages, this makes it valuable and promising for a wide range of applications in a number of elds such as bioimaging, 80,81 disease treatment, 82,83 catalysis, 84,85 ion detection, 86,87 and optoelectronic devices 88,89 etc. In the following, we will briey describe and introduce these three common current methods for the synthesis of biomass CQDs and discuss their future directions and challenges.…”