Photocatalytic reactions can be driven by both photochemical and photothermal processes. However, their individual contributions and synergistic effect remain to be clarified. Herein, we investigated the respective roles of these effects using a Cu–TiO₂/Ti model catalyst that integrated photochemical and photothermal functionalities within a single photocatalytic system. Employing photocatalytic methanol decomposition as a model reaction, the Cu–TiO₂/Ti catalyst achieved a high H₂ yield rate of 0.511 mmol h⁻¹ with selectivity of 96.6% toward HCHO among oxidation products, attributed to the cooperative action of photochemical and photothermal processes. In situ resonant Auger electron spectroscopy (RAS), together with in situ Cu K-edge X-ray absorption fine structure and excited-state density functional theory calculations, revealed the accumulation of photogenerated electrons at Cu sites from TiO₂, suggests the possible formation of an electron transfer pathway from TiO₂ to Cu, which promotes stepwise methanol dehydrogenation to HCHO and H₂. Simultaneously, the photothermal contribution from Ti enhanced catalytic activity by accelerating reaction kinetics and promoting the desorption of HCHO, thereby suppressing its overoxidation to CO.

Heavy metal pollution in farmland creates a problem that does not end when contaminated plants are harvested. Crop residues and plants used to remove metals from polluted soils can themselves contain substantial amounts of mercury, cadmium, lead, nickel and other potentially hazardous elements. If these materials are burned, landfilled or returned directly to farmland, the metals may be released again into the environment.

Researchers have discovered that a bacterium from the human urinary tract can turn a common steroid precursor into testosterone. The finding does not show that bacteria cause prostate cancer, but it opens a new line of research into whether microbes can influence the hormone environment around the prostate. Computational biophysicists at Auburn University helped explain how the bacterial enzymes perform this surprising chemistry.

Satellite measurements detected declining photosynthetic activity in Western U.S. forests two years before bark-beetle mortality appeared in aerial detection surveys, according to new University of Utah-led research. The first-of-its-kind study suggests that satellite-observed chlorophyll fluorescence (SIF), a measure of plant photosynthesis, could provide an early warning of forest stress. As drought, wildfire and insect outbreaks occur with increasing frequency across the American West, the technology could also help scientists understand how these disturbances affect forests’ ability to absorb and store carbon from the atmosphere.

In recognition of his exceptional work to understand the chemistry of carbohydrates and the role they play in health and disease, Scripps Family Chair Professor Chi-Huey Wong of Scripps Research will receive the 2027 Alfred Bader Award in Bioinorganic or Bioorganic Chemistry.

Harvard researchers have created a layered semiconductor and metasurface optical device that exhibits strong nonlinear frequency conversion, including at near-infrared wavelengths.

A study investigated how ingesting expanded polystyrene (EPS) affects wharf roaches, a common shoreline scavenger. EPS-fed animals showed no significant reduction in lifespan, but their guts displayed altered expression of genes involved in chemical defense, DNA repair, and digestion. Gut microbial communities were largely unchanged, although several rare taxa were detected only in EPS-fed specimens. The findings highlight the need for a more comprehensive understanding of how microplastic pollution affects marine ecosystems.

Researchers from The University of Manchester have completely suppressed superconductivity in magic-angle graphene by screening interactions between electrons, helping resolve a long-running debate about the origin of the phenomenon.