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Chemical Science (IF: 9.556)

1. Modulating the surface defects of titanium oxides and consequent reactivity of Pt catalysts

Chem. Sci., 2019, Advance Article

DOI: 10.1039/C9SC03119G

Researchers from China gain a detailed understanding of the influence of surface defects of TiO₂ supports on the catalytic properties of Pt catalysts. High reactivity for CO oxidation can be achieved over Pt supported on reduced TiO₂ with surface oxygen vacancies, and the TOF is determined to be ∼11 times higher than that of Pt supported on oxidized TiO₂.

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2. Well-distributed Pt-nanoparticles within confined coordination interspaces of self-sensitized porphyrin metal–organic frameworks: synergistic effect boosting highly efficient photocatalytic hydrogen evolution reaction

Chem. Sci., 2019, Advance Article

DOI: 10.1039/C9SC01866B

A team of scientists from Sun Yat-Sen University have successfully immobilized Pt-nanorods into Pd-PCN-222(Hf) and acheived efficient photocatalytic hydrogen evolution reaction activity in the coordination nanospaces of the resultant MOF composite. The photocatalyst displays excellent activity, achieving a H₂ evolution rate of 22 674 μmol g^-1 h^-1, and can be recycled and reused for three successive runs.

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Nanoscale Horizons (IF: 9.095)

1. Highly efficient visible-light-driven oxygen-vacancy-based Cu₂₊₁O micromotors with biocompatible fuels

Nanoscale Horiz., 2019, Advance Article

DOI: 10.1039/C9NH00592G

Photocatalytic light-driven micro/nanomotors have exhibited great potential in various applications ranging from environmental to biomedical fields. However, in order to expand the practicality of synthetic micromotors, overcoming the challenges of efficiently converting visible light energy to mechanical propulsion energy in fully-biocompatible environments has become critically important. Here, the authors introduce the most efficient visible-light driven micromotors fueled by pure water to date. Exceptionally high speeds set new records for photocatalytic micromotors operated in fully green environments, and the proposed novel fabrication approach may pave a new way for designing and mass-producing highly efficient, smart micromachines for on-demand operations, motion-based sensing, and enhanced cargo transportation.

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2. A soft X-ray activated lanthanide scintillator for controllable NO release and gas-sensitized cancer therapy

Nanoscale Horiz., 2019, Advance Article

DOI: 10.1039/C9NH00564A

Multifunctional light stimuli-responsive NO-based gaseous theranostic systems can kill cancer cells at high concentration with few adverse effects. However, on-demand NO-releasing nanoplatforms for deep-tissue gas-based cancer therapy have not yet been explored. Here, the authors develop a new type of soft X-ray-activated NaYF₄:Gd/Tb scintillator as a light transducer for depth-independent NO release and on-demand gas-sensitized cancer therapy. Ultralow dosage soft X-ray-triggered NO release could be achieved in deep tissues even up to 3 cm depth, which broke the depth limitation suffered by the traditional UV/vis and near infrared light.

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3. Multiple morphologies and functionality of nanowires made from earth-abundant zinc phosphide

Nanoscale Horiz., 2019, Advance Article

DOI: 10.1039/C9NH00398C

The deployment of Zn₃P₂ as a photovoltaic absorber material has been limited by its lattice parameter and thermal expansion coefficient which are mismatched to commercially available substrates. In this work, the authors show for the first time the epitaxial growth of high-quality Zn₃P₂nanowires. The nanowire form provides a way to circumvent the need of such an ideal substrate. By controlling the fluxes and substrate temperature we tailor the nanowire morphology, orientation, composition and optical properties. They thus provide a new avenue to integrate this functional and earth-abundant compound semiconductor for energy harvesting applications.

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