Intervening Bismuth Tungstate with DNA Chain Assemblies: A Perception toward Feedstock Conversion via Photoelectrocatalytic Water Splitting

Abstract

An advanced approach with DNA-mediated bismuth tungstate (Bi2WO6) one-dimensional (1-D) nanochain assemblies for hydrogen production with 5-fold enhanced photoelectrochemical (PEC) water splitting reaction is presented. The creation of new surface states upon DNA modification mediates the electron transfer in a facile manner for a better PEC process. The UV-Vis-DRS analysis results a red shift in the optical absorption phenomenon with the interference of DNA modification on Bi2WO6, and, thus, the band gap was tuned from 3.05 eV to 2.71 eV. The applied bias photon-to-current efficiency (ABPE) was calculated and shows a maximum for the Bi2WO6@DNA-2 (25.22 × 10–4%), compared to pristine Bi2WO6 (7.76 × 10–4%). Furthermore, the idea of practical utility of produced hydrogen from PEC is established for the first time with photocatalytic feedstock conversion to platform chemicals using cinnamaldehyde, 2-hydroxy-1-phenylethanone, and 2-(3-methoxyphenoxy)-1-phenylethanone in large scale by hydrogenation and/or hydrogenolysis reactions under eco-friendly green conditions with external hydrogen pressure in an aqueous mixture. Also, the recyclability experiment delivered good yields, which further confirm the robustness of the developed catalyst.

Sonochemical regulation of oxygen vacancies for Bi2WO6 nanosheet-based photoanodes to promote photoelectrochemical performance

“…As shown in Fig. 3f, η inj values for the BWO, BWO-u0, and BWO-u3 photoanodes are 9.3, 17.7, and 35.4%, respect- 11,24,[41][42][43][44][45][46][47][48][49][50] ively. The increasing η inj trend correlates with greater Vo concentrations induced by intensified ultrasound treatment.…”

Recent Development Strategies for Bismuth‐Driven Materials in Sustainable Energy Systems and Environmental Restoration

“…With BiVO 4 being explicitly used for photoelectrochemical water splitting, Bi 2 WO 6 using deoxyribonucleic acid (DNA) modification has been reported as an advanced approach. [ 243 ] In doing so, it is claimed that new surface states with a mid‐gap energy band are formed, facilitating electron transport in the DNA‐modified system. However, evidence for this surface state generation is qualitative only (via diffusion spectroscopy), without any quantitative support.…”

Genomic DNA-mediated formation of a porous Cu2(OH)PO4/Co3(PO4)2·8H2O rolling pin shape bifunctional electrocatalyst for water splitting reactions

“…Although, various DNA-guided nanostructure materials are well-reported in literature, 9,10,[29][30][31][32][33][34][35][36][37] O rolling pin shape composite structure exhibited an outstanding electrochemical OER and HER performance and high durability compared to its constituents. The electrochemical experimental results exhibited a superior OER performance with a small overpotential of 234 mV with a Tafel slope of 62 mV dec À1 at 10 mA cm À2 , and for HER it possessed a low overpotential of 138 mV with a Tafel slope of 41 mV dec À1 obtained at 10 mA cm À2 current density.…”