It has been known for many years that dyes and pigments are subject to light-induced
degradation, or photodegradation, when exposed to light. It is the very reason why some …

Indigo, one of the most ancient and abundant dyes in human history, has recently emerged
as a potential functional motif due to its intriguing photochemical properties. This review …

Heritage materials are highly complex systems of unknown and intrinsically heterogeneous
compositions and unmonitored long-term modifications. In this microreview, we describe our …

A mixture of α/β-Bi 2 O 3 and α-Bi 2 O 3 powders were obtained by a simple solid state
reaction–annealing route at 550° C. The structure, optical properties and surface area of the …

In this article we report a novel and affordable approach to fabricate supported ZnO/Bi 2 O 3
heterostructures for the visible-light photocatalytic degradation of organic compounds. This …

The absorption of light gives a pigment its colour and its reason for being, but it also creates
excited states, that is, new molecules with an energy excess that can be dissipated through …

In this paper, we discuss the importance of distinguishing the contributions of photolysis,
adsorption, sensitization, degradation and mineralization processes to the photocatalytic …

The silk relics have been severely faded after being discovered due to the degradation of
dyes and pigments, which presents significant challenges to the identification and …

Four kinds of fibers with 11 traditional natural dyes were measured using a portable
spectrometer equipped with optical fibers working in reflectance mode (fiber optic …

This work concerns the study of colors and dyes identified on archaeological textiles from
the Atacama Desert. The different garments and ornaments come from the excavation of two …