Bio-inspired Z-scheme g-C3N4/Ag2CrO4 for efficient visible-light photocatalytic hydrogen generation

Abstract

Due to low charge separation efficiency and poor stability, it is usually difficult for single-component photocatalysts such as graphitic carbon nitride (g-C3N4) and silver chromate (Ag2CrO4) to fulfill photocatalytic hydrogen production efficiently. Z-scheme charge transport mechanism that mimics the photosynthesis in nature is an effective way to solve the above problems. Inspired by photosynthesis, we report Ag2CrO4 nanoparticles-decorated g-C3N4 nanosheet as an efficient photocatalyst for hydrogen evolution reaction (HER) with methanol as sacrificial agent. The formation of Z-scheme g-C3N4/Ag2CrO4 nanosheets photocatalysts could inhibit the recombination of photogenerated electron-hole pairs, promote the generation of hydrogen by photosplitting of water. The experiment results indicate that g-C3N4/Ag2CrO4 nanocomposites present enhanced photocatalytic activity and stability in the H2 evolution of water splitting. And the nanocomposites g-C3N4/Ag2CrO4(23.1%) show the 14 times HER efficiency compared to that of bare g-C3N4.

RAPID: Early Classification of Explosive Transients Using Deep Learning

“…Recurrent Neural Networks (RNNs), such as Long Short-Term Memory (LSTM) and Gated Recurrent Unit (GRU) networks have been shown to achieve stateof-the-art performance in many benchmark time-series and sequential data applications (Bahdanau et al 2014;Sutskever et al 2014;Che et al 2018). Its success in these applications is due to its ability to retain an internal memory of previous data, and hence capture long-term temporal dependencies of variable-length observations in sequential data.…”

Pyrolysis‐Synthesized g‐C3N4/Nb2O5 Nanocomposite for Enhanced Photocatalytic Activity under White LED Light Irradiation

“…Mainly, the individual component of the pure g‐C 3 N 4 catalyst quickly suffered with recombination of photo induced electron/hole pairs as only a minor fraction of them actively contributed in water splitting reaction, and thus showed low photocatalytic activity . As a result of experiments and characterization, a plausible photocatalytic reaction mechanism was proposed for g‐C 3 N 4 with Nb 2 O 5 heterostructure as shown in Figure .…”

Arylene Ethynylene-Functionalized Bithiazole-Based Zinc Polymers for Ultraefficient Photocatalytic Activity

“…This result further manifests that photoexcited PAE–BTz needs more time to arrive in the balance than pure PAE. 50…”