Visible-light-driven pollutants degradation with carbon quantum dots/N-TiO2 under mild condition: Facile preparation, dramatic performance and deep mechanism insight

Degradation Efficiency of Organic Dyes on CQDs As Photocatalysts: A Review

“…The quantum yield (QY) of CQDs was 27.6%, and the QY of the chlorine- and nitrogen-doped CQDs was much lower. The Cl-CQDs degraded the highest amount of Indigo carmine and the degradation percentage of the dye was reported to be 60%. − The composites of CQDs that have been used for the degradation of IC are reported in Table and can be seen diagrammatically in Figure .…”

“…For the formation of the composite, CQDs and N-TiO 2 were mixed for 1 h, and put through the process of centrifugation, washing, and drying for an entire night at 90 °C. 78,80 The degradation mechanism of RhB using N-doped TiO 2 NPs/CQDs composite is shown in Figure 15, while Table 5 and Figure 16 • Animal wastes, such as bones, eggshells, and bristles, are being manipulated to create CQDs that can then be used to clean the environment.…”

“…To form N-TiO 2 , a combination of urea (NH 2 ) 2 CO, nitric acid (HNO 3 ), and anhydrous ethanol was mixed with tetra butyl titanate and was maintained at 240 °C for 10 h in a high-pressure reactor, dried and for 6 h, it was subjected to calcination at 200 °C. For the formation of the composite, CQDs and N-TiO 2 were mixed for 1 h, and put through the process of centrifugation, washing, and drying for an entire night at 90 °C. , The degradation mechanism of RhB using N-doped TiO 2 NPs/CQDs composite is shown in Figure , while Table and Figure contain different types of CQDs and their composites used for the degradation of RhB in recent years.…”

Kilogram-scale fabrication of TiO2 nanoparticles modified with carbon dots with enhanced visible-light photocatalytic activity

“…8c). 77,78 In general, a stronger SPV signal means a higher charge separation efficiency. It can be observed that the SPV response in the range of 350-400 nm denotes the electron transition from the VB to the CB of TiO 2 (band-band transition) under illumination.…”

Recent Progress on Carbon Quantum Dots Based Photocatalysis

“…Zhang et al constructed a carbon quantum dots/nitrogen doping TiO 2 (CDs/N-TiO 2 ) nanocomposite ( Zhang J. et al, 2020 ). Ascorbic acid and ethanol were held in a high-pressure reactor for 3 h at 160°C to make CDs.…”