Photocatalytic Reduction of CO₂to CO over Quinacridone/BiVO₄Nanocomposites

Abstract

Solar energy-driven photoreduction of CO 2 to energy-rich chemicals is of significance for sustainable development but challenging. Herein, quinacridone (QA)/nBiVO 4 (n = 0.2-20, in which n stands for the mass ratio of BiVO 4 to QA) nanocomposites were developed for photoreduction of CO 2. Characterization of the materials with Fourier-transform (FT)IR spectroscopy and X-ray photoelectron spectroscopy (XPS) pointed to QA/nBiVO 4 preparation via hydrogen-bonding-directed selfassembly of QA on BiVO 4 nanosheets. Using triethanolamine (TEOA) as a sacrifice reagent, QA/10BiVO 4 showed the best performance, affording CO with a production rate of 407 μmol g À 1 h À 1 , 24 times higher than those of pure QA. It was indicated that the Z-scheme charge-transfer mechanism of QA/ nBiVO 4 could significantly improve the separation and transmission efficiency of photo-generated electrons and holes. This novel approach provides new insight for fabricating the composite photocatalytic materials of small molecule organic semiconductors and inorganic semiconductors with high efficiency for photocatalytic of reduction CO 2 .

Ni–Co Bimetallic Hydroxide Nanosheet Arrays Anchored on Graphene for Adsorption‐Induced Enhanced Photocatalytic CO2 Reduction

“…According to reported studies, a low PL emission intensity is more effective in suppressing photoexcited charge recombination, which leads to good photocatalytic performance. [35,36] The Ni 7 Co 3 -GR sample exhibited the lowest PL emission intensity because its energy band structure allowed it to promote the transfer of photogenerated carriers and suppress the recombination of photogenerated electron/hole pairs. The above optical characterization results further confirmed the excellent photocatalytic performance of the Ni 7 Co 3 -GR catalyst.…”

Quinacridone dyes: versatile molecules and materials for photo- and photoelectrochemical processes

“…49 More recently, photocatalytic reduction of CO 2 to CO was achieved over a Z-scheme inspired Quinacridone/BiVO 4 nanocomposites. 50 The QA/nBiVO 4 hybrid materials were prepared in different compositions (n = 0.2-20, n is mass ratio of BiVO 4 to QA) by hydrogen-bonding self-assembly of QNC over hydroxylated BiVO 4 nanosheets.…”

Photoelectrochemical C−H Activation Through a Quinacridone Dye Enabling Proton‐Coupled Electron Transfer

“…It is considered a hydrogen‐bonded organic semiconducting pigment and has been used in field‐effect transistors, [33] in light emitting diodes [34] and in CO 2 capture [35] . QNC has also been employed in photoelectrochemical processes for reduction of oxygen to hydrogen peroxide [36] and of carbon dioxide to CO, [37] and more recently in both the cathodic and anodic compartments of a photoelectrochemical cell for water splitting [38] . Besides the above properties and applications, we focused on QNC given its possibility to operate through proton‐coupled electron transfer mechanisms, with the N−H group that can be converted into a N centered radical, being capable of abstracting hydrogen atoms from C−H bonds and promoting their oxidative activation [39–41] .…”