A Novel and Highly Efficient Photocatalyst Based on P25–Graphdiyne Nanocomposite

Abstract

Titania nanoparticles (P25) are successfully chemically bonded with graphdiyne (GD) nanosheets by a facile hydrothermal treatment, to form a novel nanocomposite photocatalyst. The as-prepared P25-GD nanocomposite exhibits higher photocatalytic activity for degrading methylene blue under UV irradiation than not only P25 and P25-carbon nanotube composite but also the current well-known P25-graphene composite photocatalysts. Moreover, P25-GD also shows considerable visible-light-driven photocatalytic activity, since the formation of chemical bonds between P25 and GD effectively decreases the bandgap of P25 and extends its absorbable light range. The photocatalytic activity of P25-GD can be adjusted by changing the content of GD in composites and the optimized value is about 0.6 wt%. Such a nanocomposite photocatalyst might find potential application in a wide range of fields including air purification and waste water treatment.

A Universal Strategy to Prepare Functional Porous Graphene Hybrid Architectures

“…[ 29,[59][60][61][62][63][64] Carbon-based materials with conjugated π systems can often induce synergistic or cooperative effects between the metal oxide and carbon phases. [ 65 ] Therefore, we tested the photoelectrochemical behaviors of rGO/TiO 2 -NP hybrid architectures in a three-electrode confi guration, as depicted in Figure 3 a. The rGO/TiO 2 -NP hybrid architectures show a fast and uniform anodic photocurrent responding to each switchon and switch-off event, as shown in Figure 3 c. It is different from that of pure rGO architecture, which display a cathodic photocurrent (Figure 3 c), corresponding to p-type photoresponse.…”

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

“…[1][2][3][4][5][6][7] In particular, heterogeneous photocatalysis that couples light with chemical reactions is of paramount importance in chemistry and energy applications. [8][9][10][11][12][13][14][15][16] Plasmonic enhancement is currently a hot topic in catalysis-driven chemistry and photonic materials due to its important role as the main mediator bridging solar energy with other energy forms. For instance, the photocatalytic water splitting reaction used for biomimetic plant photosynthesis represents a promising solution to the growing demands for clean and sustainable energy.…”

A New Graphdiyne Nanosheet/Pt Nanoparticle‐Based Counter Electrode Material with Enhanced Catalytic Activity for Dye‐Sensitized Solar Cells

“…[ 16 ] Until now, GD has been applied in polymer solar cells, fuel cells, and photocatalytic areas; it has shown a promising catalytic performance in these studies. [17][18][19][20][21][22][23] Due to its unique structure, GD shows n-type semiconductor behavior with moderate bandgaps; its electron cloud density is higher than graphene (GR) according to theoretical calculations. [ 24,25 ] On the other hand, Pt is a transitional metal element, which has a 3d unoccupied orbital.…”