10.1021/acs.est.9b01453.s001 Dengjun Wang Dengjun Wang Navid B. Saleh Navid B. Saleh Wenjie Sun Wenjie Sun Chang Min Park Chang Min Park Chongyang Shen Chongyang Shen Nirupam Aich Nirupam Aich Willie J. G. M. Peijnenburg Willie J. G. M. Peijnenburg Wei Zhang Wei Zhang Yan Jin Yan Jin Chunming Su Chunming Su Next-Generation Multifunctional Carbon–Metal Nanohybrids for Energy and Environmental Applications American Chemical Society 2019 graphitic carbon nitride graphene family nanomaterials EWE nexus Environmental Applications Nanotechnology nanohybrid next-generation multifunctional CMNHs e.g parent component materials CO Cu 2 O future research directions 2019-06-14 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Next-Generation_Multifunctional_Carbon_Metal_Nanohybrids_for_Energy_and_Environmental_Applications/8313926 Nanotechnology has unprecedentedly revolutionized human societies over the past decades and will continue to advance our broad societal goals in the coming decades. The research, development, and particularly the application of engineered nanomaterials have shifted the focus from “less efficient” single-component nanomaterials toward “superior-performance”, next-generation multifunctional nanohybrids. Carbon nanomaterials (e.g., carbon nanotubes, graphene family nanomaterials, carbon dots, and graphitic carbon nitride) and metal/metal oxide nanoparticles (e.g., Ag, Au, CdS, Cu<sub>2</sub>O, MoS<sub>2</sub>, TiO<sub>2</sub>, and ZnO) combinations are the most commonly pursued nanohybrids (carbon–metal nanohybrids; CMNHs), which exhibit appealing properties and promising multifunctionalities for addressing multiple complex challenges faced by humanity at the critical energy–water–environment (EWE) nexus. In this frontier review, we first highlight the altered and newly emerging properties (e.g., electronic and optical attributes, particle size, shape, morphology, crystallinity, dimensionality, carbon/metal ratio, and hybridization mode) of CMNHs that are distinct from those of their parent component materials. We then illustrate how these important newly emerging properties and functions of CMNHs direct their performances at the EWE nexus including energy harvesting (e.g., H<sub>2</sub>O splitting and CO<sub>2</sub> conversion), water treatment (e.g., contaminant removal and membrane technology), and environmental sensing and in situ nanoremediation. This review concludes with identifications of critical knowledge gaps and future research directions for maximizing the benefits of next-generation multifunctional CMNHs at the EWE nexus and beyond.