DataVXACS Applied Materials & InterfacesPaper
journal article·2021-08-18Open access

Enhanced Artificial Enzyme Activities on the Reconstructed Sawtoothlike Nanofacets of Pure and Pr-Doped Ceria Nanocubes

Lei Jiang, Miguel Tinoco, Susana Fernández-García, Yujiao Sun, Mariia Traviankina, Pengli Nan, Qi Xue, Huiyan Pan, Almudena Aguinaco, Juan M. González-Leal, Ginesa Blanco, Eduardo Blanco, Ana B. Hungría, Jose J. Calvino, Xiaowei Chen

ACS Applied Materials & Interfaces· Volume 13· Issue 32
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Source abstract

Abstract

In this work, a simple one-step thermal oxidation process was established to achieve a significant surface increase in {110} and {111} nanofacets on well-defined, pure and Pr-doped, ceria nanocubes. More importantly, without changing most of the bulk properties, this treatment leads to a remarkable boost of their enzymatic activities: from the oxidant (oxidase-like) to antioxidant (hydroxyl radical scavenging) as well as the paraoxon degradation (phosphatase-like) activities. Such performance improvement might be due to the thermally generated sawtoothlike {111} nanofacets and defects, which facilitate the oxygen mobility and the formation of oxygen vacancies on the surface. Finally, possible mechanisms of nanoceria as artificial enzymes have been proposed in this manuscript. Considering the potential application of ceria as artificial enzymes, this thermal treatment may enable the future design of highly efficient nanozymes without changing the bulk composition.
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Research context

Nanomaterials

OpenAlex topics: Advanced Nanomaterials in Catalysis · Electrochemical sensors and biosensors · Nanocluster Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Heavy Oil State Laboratory and Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China

Departamento de Ciencia de los Materiales, Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, Puerto Real, Cádiz E-11510, Spain

Henan Key Laboratory of Industrial Microbial Resources and Fermentation Technology, College of Biological and Chemical Engineering, Nanyang Institute of Science and Technology, Nanyang 473004, China

Departamento de Física de la Materia Condensada, Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, Puerto Real, Cádiz E-11510, Spain

Instituto Universitario de Investigación en Microscopía Electrónica y Materiales (IMEYMAT), Universidad de Cádiz, Campus Río San Pedro, Puerto Real, Cádiz E-11510, Spain

Funding

Ministerio de Ciencia, Innovaci??n y Universidades · Ministerio de Educaci??n, Cultura y Deporte · Natural Science Foundation of Shandong Province · Fundamental Research Funds for the Central Universities · Chinese Scholarship Council · Key R&D Program of Shandong Province · Instituto Universitario de Investigaci??n en Microscop??a Electr??nica y Materiales (IMEYMAT), Universidad de C??diz

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