Graphitic carbon nitride quantum dots and nitrogen-doped carbon quantum dots co-decorated with BiVO4 microspheres: A ternary heterostructure photocatalyst for water purification

Enhancement of visible‐light photocatalytic degradation performance over nitrogen‐deficient g‐C3N4/KNbO3 heterojunction photocatalyst

“…Obviously, compared with single‐phase CN, CNx and KNO, 3% KNO/CNx exhibits the smallest arc radius under visible‐light irradiation. Generally, the smaller the arc radius, the faster the separation and transfer speed of photogenerated electron–hole pairs, suggesting that the 3% KNO/CNx composite photocatalyst has stronger ability to suppress electron–hole pair recombination, which is very consistent with the photocatalytic performance described earlier.…”

“…(b), the as‐prepared photocatalyst produced almost no signal in the dark. However, the characteristic signals of DMPO • O 2 − and DMPO • OH could be observed under visible light, indicating that • O 2 − and • OH were generated in the photodegradation process . It is worth noting that the signal of • O 2 − is clear and strong, which confirms the leading role of • O 2 − , corresponding to the capture experiment (Fig.…”

“…However, the characteristic signals of DMPO • O 2 − and DMPO • OH could be observed under visible light, indicating that • O 2 − and • OH were generated in the photodegradation process. 50 It is worth noting that the signal of…”

Facile synthesis, morphological, structural, photocatalytic and optical properties of CoFe2O4 nanostructures

“…These metal oxides offer wide band gap, non-toxicity, low cost, chemical stability and environment friendly characteristics and hence find promising applications in sensors, photovoltaics and photocatalysis [18]. Bismuth-based semiconductors have also been reported as efficient photocatalysts to decompose pollutants into non-toxic molecules for environmental application [19]. However, there are certain limitations associated with these metal oxides when it comes to photocatalytic purification of water: (1) inefficient utilization of visible light coming from their wide band gap and (2) difficulty for recovery after use [20][21][22].…”

Photocatalytic properties of CuO/(001)‐TiO2 composites synthesized by the vapor–thermal method

“…Due to its stable physicochemical properties, abundant reserves, nontoxicity, environment‐friendly nature and low cost, tetragonal symmetric anatase TiO 2 has been widely used in the degradation of organic pollutants, electrocatalysis, solar cells and self‐cleaning . The photocatalytic properties of anatase TiO 2 crystals are anisotropic, because different exposed crystal faces have different atomic structures, electronic structures and surface energies, which result in differences of adsorption capacity of TiO 2 to pollutant molecules and electron transfer.…”