Photocatalytic conversion of biomass-based monosaccharides to lactic acid by ultrathin porous oxygen doped carbon nitride

Reforming of Soluble Biomass and Plastic Derived Waste Using a Bias‐Free Cu30Pd70|Perovskite|Pt Photoelectrochemical Device

“…The transition from conventional suspension processes to unassisted PEC systems using a high-performance perovskite light absorber for waste reforming provides a significant advancement towards addressing the major existing bottlenecks such as low product yield (both H 2 and oxidation products) and uncontrolled oxidation leading to CO 2 emission or poor selectivity of the organic products. [3][4][5][6]10] Our approach addresses these challenges, as Cu 30 Pd 70 |perovskite|Pt systems showcase product formation rates of up to ≈130 µmol cm −2 h −1 (normalized to geometrical irradiation area), which are ≈10 2 -10 4 times higher than previously reported photoreforming processes with established photocatalysts (Figure 5). Moreover, the high selectivity (60-90%) demonstrated by our systems towards the formation of a single value-added product, particularly for real-world substrates like PET bottles (≈90%), presents an attractive commercial advantage compared to typical photoreforming processes where only mixtures of non-utilizable products are obtained.…”

“…A dark mixed-waste solution can be utilized on the anodic side without blocking the light in the cathodic compartment, which is not possible in photocatalytic processes with homogenous or heterogenous photocatalysts. [6,10,11] This separation also enables a better optimization and rational development of the individual redox catalysts, which is challenging with semiconductor powders. Furthermore, the system can also be envisioned to perform other fuel forming reactions such as CO 2 reduction on the cathodic side instead of H 2 evolution, thereby increasing the product scope in future development.…”

“…[ 1–3 ] Photoreforming of abundant waste resources has emerged as a promising technology and relies on the excitation of a photocatalyst to oxidize the waste substrate, while simultaneously producing H 2 . [ 3–6 ] Thus, photoreforming is unfolding as a complementary approach to other chemical recycling strategies such as pyrolysis or gasification of biomass and plastics, which are energy‐intensive, rely often on relatively pure waste streams, and emit greenhouse gases. [ 7–9 ] In addition to H 2 generation, the waste substrates can be themselves photo‐converted into value‐added organic products, making the entire process economically more appealing.…”

Conversion of Plastic Waste into Supports for Nanostructured Heterogeneous Catalysts: Application in Environmental Remediation

“…Another category is metal oxide nanoparticles, also called nanostructured semiconductors (i.e., titanium dioxide, silver oxide, zinc oxide, among others) [158][159][160][161]. These nanomaterials are widely investigated in catalytic systems with an emphasis on developing environmentally correct processes that can promote environmental recovery in environments contaminated with waste or effluents, and even in the search for sustainable development, producing value-added molecules from renewable sources [162][163][164][165].…”

g-C3N4 Sensitized by an Indoline Dye for Photocatalytic H2 Evolution

“…The peaks at 1250, 1330, 1413, 1575, and 1645 cm −1 correspond to the stretching vibration modes of C-N and C=N bonds of the heptazine heterocyclic ring (C 6 N 7 ) [51]. A broad peak located from 2800 to 3600 cm −1 signifies the existence of abundant -NH x [52]. As for D149 dye, the peak at 1128 cm −1 corresponds to a C-O bond.…”