首页|Design of Nd-SrTiO_3/SrCO_3@Ag_2O Z-scheme heterojunction with the dual internal electric field for piezo-photocatalytic removal of pollutants

Design of Nd-SrTiO_3/SrCO_3@Ag_2O Z-scheme heterojunction with the dual internal electric field for piezo-photocatalytic removal of pollutants

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  • NETL
  • NSTL
  • Elsevier
With the increasing severity of environmental pollution problems, developing efficient and low-cost pollution control technologies has become an urgent task. This study designed and prepared a novel Nd-SrTiO_3/ SrCO_3@Ag_2O (Nd-SSTO/Ag_2O) dual internal electric field material for piezoelectric photocatalytic removal of pollutants from water. Under simulated sunlight irradiation, the material exhibited excellent photocatalytic activity. Among them, under single visible light irradiation and single ultrasound vibration, the degradation rate of RhB by 2.5 % Nd-SSTO/Ag_2O-0.2 only reached 22.4 % and 25.6 % in 1 h, respectively. However, when visible light and ultrasound vibration act simultaneously, the degradation rate of RhB by 2.5 % Nd-SSTO/Ag_2O-0.2 reached 95.1 % in 1 h with the reaction rate constants being 8.86 times and 1.64 times those of SSTO and Ag_2O respectively. Furthermore, after four cyclic experiments, the degradation efficiency of RhB by 2.5 % Nd-SSTO/ Ag_2O-0.2 remained above 90 %. Additionally, ICP analysis revealed that the amount of catalyst elements released into the solution during the degradation process was extremely low, indicating that the prepared 2.5 % Nd-SSTO/Ag_2O-0.2 catalyst possesses good stability. Through Nd doping, the light absorption range of SSTO was extended from the ultraviolet region to the visible region. After inducing Ag_2O, a Nd-SSTO/Ag_2O Z-scheme heterojunction was formed with the dual internal electric field, which not only expanded the carrier transmission channel but also improved the photo-induced carrier separation, allowing more e~- and h~+ to participate in the photocatalytic degradation reaction. Additionally, the piezoelectric characteristics of SrTiO_3 (STO) further accelerated the migration of e~- -h~+ pairs. This study opens up a new idea for the development and preparation of high-efficiency piezoelectric photocatalytic materials, and also provides a potential technical approach for environmental pollution control.

Piezo-photocatalysisDegradationDual internal electric fieldRare earth element NdSrTiO_3

Jiayi Huang、Hongji Li、Chunjiao Hu、Jingmei Li、Xiulong Li、Dandan Wang、Dianmin Ju

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School of Life Science and Technology, Changchun University of Science and Technology, Changchun, 130022, China||Zhongshan Institute of Changchun University of Science and Technology, Zhongshan, 528437, China

Zhongshan Institute of Changchun University of Science and Technology, Zhongshan, 528437, China||Hainan Engineering Research Center of Tropical Ocean Advanced Opto-electrical Functional Materials, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, 571158, China

Jilin College of the Arts, Changchun, 130021, China

Changchun College of Electronic Technology, Changchun, 130114, China

School of Chemistry and Chemical Engineering Hainan University, Haikou, 570228, Hainan, China

School of Life Science and Technology, Changchun University of Science and Technology, Changchun, 130022, China

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2025

10.1016/j.jenvman.2025.125211

Journal of environmental management

Journal of environmental management

ISSN：0301-4797
年,卷(期)：2025.382(May)
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