Chemiresistive gas sensors (CGSs) have revolutionized the field of gas sensing by
providing a low-power, low-cost, and highly sensitive means of detecting harmful gases …

CO 2 is one of the major anthropogenic greenhouse gases in the atmosphere contributing to
global warming (Blamey et al., 2010; Mikkelsen et al., 2010). In the last half-century, the …

Synthetic chemists have developed robust methods to synthesize discrete molecules, linear
and branched polymers, and disordered cross-linked networks. However, two-dimensional …

Porous organic polymers (POPs) have well-defined porosities, high surface areas, and
attractive surface chemical functionalities. Because of these properties, POPs and their …

Covalent organic frameworks (COFs) are a class of crystalline porous organic polymers with
permanent porosity and highly ordered structures. Unlike other polymers, a significant …

Conjugated microporous polymers (CMPs) are a unique class of materials that combine
extended π-conjugation with a permanently microporous skeleton. Since their discovery in …

Covalent organic frameworks (COFs) are an emerging class of crystalline porous polymers
with highly tuneable structures and functionalities. COFs have been proposed as ideal …

Atomically dispersed metal catalysts (ADCs), as an emerging class of heterogeneous
catalysts, have been widely investigated during the past two decades. The atomic dispersion …

This review focuses on the discussion of the latest progress and remaining challenges in
selected metal-free photocatalysts for hydrogen production. The scope of this review is …

Conjugated polymers have recently been under active investigation as promising
alternatives to traditional inorganic semiconductors for photocatalysis. This is due to their …