Construction and in-situ thermodynamics/kinetics studies on Ag-bridged g-C3N4-{0 0 2}/BiOBr-{0 0 1} facet Z–scheme heterojunction with crystal plane synergistic effect based on photocalorimetry - spectroscopy technology

•The novel Ag-bridged g-C3N4-{002}/BiOBr-{001} facet Z–scheme heterojunction had been synthesized via a chemical reduction method coupled with deposition strategy.•Three main heat exchanges were detected during the photocatalytic action, corresponding to the electron-hole pair generation and degradation Rh-6G by active species for this advanced ternary crystal heterojunction structure.•The results have demonstrated the mineralization and degradation of non-fluorescent chromophore intermediates which were the rate-determining steps eventually dominated, in accordance with a pseudo-zero-order process.