Preparation of composite photocatalyst with tunable and self-indicating delayed onset of performance and its application in polyethylene degradation

Photocatalytic Conversion of Plastic Waste: From Photodegradation to Photosynthesis

“…Among the plastics, polyolefins (e.g., PE and PP), which account for 57% of the total plastics produced, [112][113][114] are the most widely investigated in photodegradation studies. [97,[115][116][117][118][119][120][121][122][123][124][125][126][127][128][129][130][131][132][133] Taking PE as an example, some representative studies on solidphase photodegradation of PE in recent years are shown in Figure 5a. Most studies show that it takes several days to weeks for the degradation of majority of the PE, mainly using TiO 2based photocatalyst.…”

Photoredox-Catalyzed Plastic Waste Conversion: Nonselective Degradation versus Selective Synthesis

“…In addition to TiO 2 -based photocatalysts, other catalysts with superior performance also have been reported for nonselective degradation and selective synthesis of plastic waste, including ZnO, [70][71][72]80 ZrO 2 , 73 RGO, 61,75 and some plant extracts. 76,77 For instance, Dai et al have constructed another innovative photocatalyst different from TiO 2 and other wide-gap catalysts, a biomass-derived 3D MoS 2 /RGO/cotton catalyst for PE degradation and solar-powered sustainable freshwater production. 75 Unfortunately, the decomposed residues still retain the polymeric structure of PE, which is confirmed by the corresponding Fourier transform infrared (FTIR) spectra (Figure 5C).…”

“…In addition to TiO 2 -based photocatalysts, other catalysts with superior performance also have been reported for nonselective degradation and selective synthesis of plastic waste, including ZnO, − , ZrO 2 , RGO, , and some plant extracts. , For instance, Dai et al have constructed another innovative photocatalyst different from TiO 2 and other wide-gap catalysts, a biomass-derived 3D MoS 2 /RGO/cotton catalyst for PE degradation and solar-powered sustainable freshwater production . MoS 2 , as a distinguished and reliable photocatalyst, can readily generate various high ROS (e.g., •OH and •O 2 – ) than TiO 2 and to better mineralize the C–C bond of PE microplastics into CO 2 under sunlight irradiation.…”

State of the art in the photochemical degradation of (micro)plastics: from fundamental principles to catalysts and applications

“…When plastics are disposed in the presence of photocatalysts, briey, their degradation can be attributed to the following procedures: (i) capturing energy from light to produce electron-hole pairs, (ii) aggregating charge from the interior homogeneous dispersal of the photocatalysts to the surface, and (iii) triggering the redox reactions with the actuation of charges at the interface between reactants and photocatalysts. [78][79][80] When the photocatalyst absorbs light with sufficiently high energy, electrons are excited from the valence band to the conduction band, e (CB) −, and subsequently holes are formed on the valence band, h (VB) +. 81 One strategy for photocatalytic reaction is conducted in an oxygen-rich atmosphere, which is called the O 2 evolution reaction (OER).…”

“…11). 78 The particular self-colourchanging property ts well with the beginning of the active stage of degradation, from blue to white, which prots from the addition of hydroxyethyl cellulose (HEC). Aer 72 h irradiation with the T@A 0.1 IN photocatalyst, LDPE-CP was oxidized, where the carbonyl index (CI) was 0.6556, and mineralized into CO 2 .…”