The selective transition-metal catalysed cross-coupling of two fragments to form new C-C bonds has become an indispensable tool for the modern synthetic chemist. Despite the relatively high cost of palladium, traditional methods have favoured its use in cross-coupling due to its high catalytic activity, substrate compatibility, and the broad range of transformations that are possible. More recently, however, in the search for catalytic systems that rely on earth-abundant metals, nickel has emerged as a valuable alternative to palladium for cross-coupling. In addition to its lower cost and greater abundance, nickel possesses a different reactivity profile to palladium: displaying a reduced propensity of Ni-alkyl intermediates to undergo β-hydride elimination, and possessing a broader array of accessible oxidation states (0, +1, +2, +3, +4), meaning that both two-and one-electron redox processes are possible. These properties mean that nickel is now often the metal of choice for metallaphotoredox C(sp 2 )-C(sp ) bond formation, with seminal examples being reported in 2014 by both Molander, using potassium trifluoroborate salts, and MacMillan and Doyle, using carboxylic acids as radical precursors, along with aryl halides, to form new bonds using a dual nickel-iridium catalysed system (Scheme 1A). Since then, a wide variety of radical precursors as coupling partners has been reported, expanding the possible synthetic disconnections available for synthetic chemists. Despite the use of an earth abundant base metal catalyst, metallaphotoredox methods with nickel still often rely on the use of precious-metal iridium-based photocatalysts. The high cost and relative scarcity of iridium often becomes an overriding factor in the use of these procedures, which becomes increasingly problematic as scale increases. As such, a substitution for cheaper, noble-metal free, and recyclable catalysts would open up use of the concept for broader exploitation. Heterogeneous semiconductors have garnered interest in the field of photocatalysis as a result of their relatively cheap cost, robust nature, and the ability to be filtered and recovered owing to their insoluble nature. Suitable semiconductor photocatalysts possess a band gap that can be excited with light from the UV or visible light regions in order to participate in single electron transfer (SET) redox processes, which can be modified by doping of these photocatalysts with additional elements. Recent reports have shown that metal-free graphitic carbon nitrides (gCNs) are effective photocatalysts in organic synthesis, and are capable of a growing number of transformations. Indeed, it has been shown that with carboxylic acid coupling partners, efficient oxidatively induced radical decarboxylation can take place to generate alkyl radical intermediates. These radicals can then react with a range coupling partners to form C-H, C-C, C-N, and C-O 29 bonds (Scheme 1B).