Dr. Yun Hau Ng’s latest review paper, titled “Heterogeneous photocatalysts: an overview of classic and modern approaches for optical, electronic, and charge dynamics evaluation” was recently published in Chemical Society Reviews -- a leading journal in the discipline of chemistry and chemical engineering with impact factor of 40.182. With more than 10 years of experience in the area of photocatalysis, Dr. Ng and his team summarises the current experimental techniques, including the conventional and the state-of-the-art tools, directed at examining key aspects that governs the performances of semiconductor photocatalysts. Although not being exhaustive, this didactic review can be useful to apprise the research community of the sophisticated research tools currently available for characterisation of photocatalysts as well as to bridge the multidisciplinary knowledge.