Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Congcong Piao,Yitong Lin,Zhiyu Liu,Liang Chen,Jianhe Tang,Dawei Fang,Jun Wang
ABSTRACT Several novel Z-scheme CuPd/SrTiO 3 –CuPd–Bi 2 O 3 photocatalysts are prepared via chemical reduction and calcination methods to degrade organic dyes containing N and S and convert NO 2 - , NO 3 - and SO 3 2- into (NH 4 ) 2 SO 4 . Sodium borohydride (NaBH 4 ), ascorbic acid (C 6 H 8 O 6 ) and hydrazine hydrate (N 2 H 4 ·H 2 O) are selected as reductants to deposit CuPd alloy nanoparticles on corresponding photocatalyst. The influence of solar light irradiation time on photocatalytic degradation of organic dye and conversion of the generated inorganic ions is studied. The reusability and stability of the prepared photocatalysts are assessed. The results indicate that the Z-scheme CuPd/SrTiO 3 –CuPd–Bi 2 O 3 photocatalyst prepared by using NaBH 4 has best photocatalytic activity, reusability and stability. The capture experiment of active species proves that holes play crucial roles in photocatalytic degradation of organic dyes and conversion of SO 3 2- and electrons are momentous for the conversions of NO 2 - and NO 3 - . A possible mechanism on photocatalytic degradation of organic dyes containing N and S and conversions of NO 2 - , NO 3 - and SO 3 2- into (NH 4 ) 2 SO 4 caused by Z-scheme CuPd/SrTiO 3 –CuPd–Bi 2 O 3 photocatalyst is proposed.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2021
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IF 3.196
Congcong Piao,Jianhe Tang,Yitong Lin,Zhiyu Liu,Xueke Liu,Dawei Fang,Jun Wang
A high-efficiency Z-scheme photocatalyst, Er 3+ :YAlO 3 @(Au/SrTiO 3 )-Au-WO 3 , is fabricated successfully via hydrothermal and photo-deposition methods. All as-prepared samples are characterized by XRD, SEM, TEM, FT-IR, EDX, XPS, Raman spectroscopy, PL and DRS. The activity of the prepared Z-scheme Er 3+ :YAlO 3 @(Au/SrTiO 3 )-Au-WO 3 photocatalyst is evaluated through photocatalytic conversion of Cr(VI) under simulated solar light irradiation. The meaningful influencing factors such as simulated solar light irradiation time, light intensity, sacrificial agents and cycling times are investigated. The results displayed that the existence of Er 3+ :YAlO 3 can improve the utilization ratio of solar light for wide band-gap SrTiO 3 . Moreover, the formation of Z-scheme SrTiO 3 /WO 3 photocatalytic system and the introduction of Au nanoparticles as electron mediator and co-catalyst can promote the separation of photo-induced electron and hole to obtain much high photocatalytic activity . Finally, the mechanism on conversion of Cr(VI) caused by Z-scheme Er 3+ :YAlO 3 @(Au/SrTiO 3 )-Au-WO 3 photocatalyst is put forward. © 2021 Elsevier B.V. All rights reserved.
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APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Junzhe Jiang,Yushuai Jia,Yabin Wang,Ruifeng Chong,Liping Xu,Xin Liu
Antibiotic has become an important organic contaminant in surface water, which poses a huge threat to human health and ecosystem. SrTiO 3 is an attractive perovskite structured semiconductor material and shows promising applications in photocatalysis . Herein, a series of lanthanum and chromium codoped SrTiO 3 (denoted as SrTiO 3 (La,Cr)- x ) with different dopant amount of La and Cr have been successfully fabricated via a facile sol-gel hydrothermal method and employed as efficient photocatalysts for the elimination of tetracycline (TC) from aqueous solution under visible-light irradiation. It indicates that the photocatalytic performance is highly dependent on the La and Cr content in the samples. Among the catalysts, the porous SrTiO 3 (La,Cr)-6 spheres with a moderate dopant amount exhibit the best photocatalytic activity for TC removal, which is approximately 4.4 and 2.3 times as superior as SrTiO 3 (La,Cr)-2 with the least dopants and SrTiO 3 (La,Cr)-8 with the most dopants, respectively. Detailed characterizations reveal that the significant improvement of photocatalytic activity is attributed to the increasing molar ratio of Cr 3+ /Cr 6+ , which can be facilely adjusted by tuning the doping amount of La and Cr during the synthesis process. In addition, the catalyst shows excellent photocatalytic stability and can be recycled over ten times with negligible activity decline. Active species trapping experiments demonstrate that superoxide radicals, holes and hydroxyl radicals are responsible for TC degradation. On the basis of the intermediate products identified using HPLC-MS, four possible reaction pathways and TC degradation mechanism have been put forward. This study offers an effective strategy to modulate the photocatalytic properties of SrTiO 3 by simple tuning the dopant content for environment and energy applications, which can be facilely extended to the modification of other semiconductors.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2018
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IF 11.698
Yan Lin,Shaohua Wu,Xiang Li,Xin Wu,Chunping Yang,Guangming Zeng,Yanrong Peng,Qi Zhou,Li Lu
Visible-light-driven photocatalysis as a promising technology has recently attracted great attention in environmental remediation. In this work, novel Z-scheme heterojunction photocatalysts Ag 3 PO 4 @MWCNTs@Cr:SrTiO 3 with excellent visible-light-driven photocatalytic performance and photostability were successfully synthesized and characterized. The photocatalytic activity for malachite green (MG) degradation was measured, and photodegradation mechanisms were investigated using GC–MS, ESR, and radical trapping experiments. On consideration of the practical applications, the effects of coexisting ions and pH were also evaluated. Results showed that significant changes of crystal size and micro-morphology for Ag 3 PO 4 were observed before and after the addition of MWCNTs, which transformed from a polyhedron with a diameter of about 30 μm into a spherical-like crystal with a diameter of 0.28–0.69 μm. This phenomenon was reported for the first time. The optimal catalyst with a dosage of 100 mg/g (the mass ratio of pollutant to photocatalyst) could reach 100% MG removal in 6 and 10 min under natural solar radiation and visible light irradiation, respectively. Results from the radical trapping experiments and ESR analysis confirmed that there existed the Z-scheme transfer mechanisms, and O 2 − and h + played an important role during the photocatalytic degradation. Several small molecular organic acids such as acetic acid, glyoxylic acid, fumaric acid and benzoic acid were detected by GC–MS in the photodegradation products of MG, which further indicates that photocatalytic degradation pathway involved N -demethylation, benzene removal and open-ring reactions. The performance of the photocatalyst would be inhibited under strong acid condition or at the coexistence of certain concentration of Cr 6+ and Cl − . The novel addition of MWCNTs in the preparation and the changes of crystal structure and properties for the photocatalysts have the potential to promote the application of the photocatalysts for environmental remediation.
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Nano Energy
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2018
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IF 13.12
Xinzheng Yue,Shasha Yi,Runwei Wang,Zongtao Zhang,Shilun Qiu
In artificial photocatalysis for hydrogen (H 2 ) generation from water reduction, low apparent quantum efficiency (AQE) always confines the photocatalytic conversion efficiency. Here, we demonstrate a new strategy for the design and synthesis of one-dimensional (1D) SrTiO 3 @Mo 2 C core-shell nanostructure for highly enhanced photocatalytic H 2 generation activity. The thin nanolayer of Mo 2 C improves the interfacial conductivity, facilitates transport of photo-generated charge carriers as well as prolongs charge carriers’ lifetime, that minimizing the recombination of photo-generated electrons and holes. Thus SrTiO 3 @Mo 2 C hybrid achieves drastically enhanced photocatalytic H 2 generation rate up to 7.93 mmol h −1 g −1 with respect to the pristine SrTiO 3 (0.53 mmol h −1 g −1 ) in a solar-driven reaction system, with an AQE of 29.3% at 313 nm. The charge carrier dynamics based mechanism was further confirmed by analysis of time-resolved photoluminescence (TRPL), surface photovoltage (SPV), transient photovoltage (TPV), open circuit potential (OCP) decay curves as well as the electrochemical impedance spectroscopy (EIS) measurements. It is unambiguously to demonstrate that Mo 2 C is a highly active cocatalyst to dramatically boost the charge separation for photocatalytic water reduction.
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APPLIED SURFACE SCIENCE
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2017
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IF 3.387
Xin Liu,Junzhe Jiang,Yushuai Jia,Jinmin Qiu,Tonglin Xia,Yuhong Zhang,Yuqin Li,Xiangshu Chen
The efficient treatment of dye wastewater has been a hot topic of environment field. The integration of adsorption and photocatalytic degradation via fabrication of bi-component heterojunction photocatalyst is considered as a facile and effective strategy to enhance the dye elimination efficiency. In this report, a Z-scheme heterojunction material, SrTiO 3 (La,Cr)/WO 3 with bifunction of adsorption and photocatalysis was successfully synthesized for efficient removal of methylene blue (MB) under visible light irradiation. The morphology and microstructure characterization demonstrates that the SrTiO 3 (La,Cr) nanoparticles are uniformly decorated on the WO 3 nanosheets, forming an intimate heterojunction interface. MB degradation results indicate that the removal efficiency by the synergistic adsorption-photocatalysis process is greatly improved compared to pure WO 3 and SrTiO 3 (La,Cr) with the adsorption and photocatalytic activity closely related to the composition of the material. The possible mechanism for the enhanced photocatalytic activity could be ascribed to the formation of a Z-scheme heterojunction system based on active species trapping experiments. Furthermore, the investigations of adsorption kinetics and isotherm show that the adsorption process follows pseudo-second-order kinetic model and Langmuir isotherm, respectively. Due to the synergistic advantages of negative zeta potential, large surface area and accelerated separation of photogenerated carriers driven by Z-scheme heterojunction, SrTiO 3 (La,Cr)/WO 3 exhibits excellent adsorption-photocatalytic performance and stability on MB removal, which could be potentially used for practical wastewater treatment.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Shuzhi Zhang,Panpan Lv,Yuxin Cui,Tong Pan,Wentao Yang,Hang Zhan,Jia Wang,Ruihang Li,Cuncheng Li,Luchao Ren,Mingwei Zhang
Lead-free dielectric capacitors have been garnering increasing attention for pulsed power applications owing to their green sustainability. BiFeO 3 (BFO) is widely researched in association with dielectric energy-storage applications, owing to its large saturated polarization and high Curie temperature. However, it suffers from serious leakage problems. In this work, BFO-based thin films with different stacking structures are designed and fabricated by introducing a linear dielectric material, SrTiO 3 (STO). The experimental results and finite-element simulations indicate that the polarization and breakdown strength can be simultaneously optimized by regulating the position of the STO layer. In particular, a recoverable energy density of 70 J/cm 3 and efficiency of 60 % is achieved in sandwiched Bi(Fe 0.93 Mn 0.05 Ti 0.02 )O 3 /SrTiO 3 /Bi(Fe 0.93 Mn 0.05 Ti 0.02 )O 3 (BFMTO/STO/BFMTO) film, owing to the synergistic effect of different dielectrics as well as the blocking effect of the interface. The capacitor exhibits a wide operating temperature window (-100–125 °C) and high frequency stability (1–20 kHz), as well as strong fatigue durability (2 × 10 7 cycles). These results demonstrate that the BFMTO/STO/BFMTO film is a promising ecofriendly material for advanced power-capacitor applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Man Zhou,Jingwen Chen,Yakang Zhang,Mengting Jiang,Song Xu,Qian Liang,Zhongyu Li
As a typical perovskite-type metal oxide , SrTiO 3 has emerged as prospective candidate for many fields. However, the synthesis of SrTiO 3 with controlled morphology, high surface area, and enhanced photocatalytic activity are still lacking. Herein, a series of porous SrTiO 3 with well-controlled morphologies including assembled nanoparticles (ANPs), golf-like particles (GLPs), star-like microspheres (SLMs), urchin-like microspheres (ULMs), and flower-like microspheres (FLMs) were successfully prepared via an ethylene glycol-water mixed solvothermal route. The ratio of V EG /V H2O play an important role in the shape-evolution during the solvothermal reaction. A comparative study of photocatalytic H 2 production and photodegradation was performed, and a possible photocatalysis mechanism of SrTiO 3 has been proposed. Significantly, the ULMs and FLMs photocatalysts of SrTiO 3 with optimized low Pt loading amount (0.075 wt %) exhibited outstanding H 2 production rates (8.21 and 7.29 mmol g −1 h −1 ) due to its unique structure of high-surface area and defect-rich surface. The facile and shape-controlled synthesis of varied SrTiO 3 structures is believed to be useful for the design and application of perovskite .
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Wentao Zhang,Yukun Li,Li Wang,Fei Zhang,Yinyin Ai,Guosheng Shao,Peng Zhang
For the transformation of the global energy structure, photocatalyst-based artificial photosynthesis for solar-to-chemical energy conversion has been regarded as promising. Herein, we report the homogenous construction of cyano-modified g-C 3 N 4 ultrathin nanolayers onto SrTiO 3 nanotubes using a simple one-step gas–solid reaction, as well as their application to photocatalytic H 2 evolution and CO 2 reduction. The creation of one-dimensional core–shell nanostructures and type II heterojunctions broaden visible light absorption range and shorten charge transfer path. The electron-absorbing cyano introduced in situ without any auxiliary salts can not only provide an appropriate driving force for electron transport and extend the active site of photocatalytic reaction, but also alter the band gap to accomplish energy band alignment. Moreover, in-situ irradiation X-ray photoelectron spectroscopy (ISI-XPS) was used to confirm the dual active site system consisting of cyano and SrTiO 3 . This work aims to promote the development of the surface modification of core-shell nanostructured photocatalysts.
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NEW JOURNAL OF CHEMISTRY
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2016
·Vol. 40
·期 6
·5198-5208
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IF 3.277
Chunbo Liu,Guoling Wu,Jibin Chen,Kai Huang,Weidong Shi
In our study, a new visible light-driven photocatalyst SrTiO3/Fe2O3 was first prepared via a simple two-step process using a hydrothermal process and electrospinning technique. The photocatalysts, composed of Fe2O3 nanowires (about 200 nm in diameter), were modified with SrTiO3 nanocube (about 50 nm) photocatalysts based on photoinduced interfacial charge transfer (IFCT). The as-prepared SrTiO3/Fe2O3 photocatalysts exhibit enhanced photocatalytic activity in degrading tetracycline (TC) over their corresponding single component under visible light irradiation. The efficient photocatalytic performance of the composites could be ascribed to the enhancement in visible light absorption efficiency and the efficient electron transfer from the valence band of the SrTiO3 nanoparticles to the Fe2O3 nanowires. This study shows their potential application in purifying TC pollution in environmental wastewater because of their high efficiency and stability.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Xiaochao Yu,Yan Lin,Haiyang Liu,Chunping Yang,Yanrong Peng,Cheng Du,Shaohua Wu,Xiang Li,Yuanyuan Zhong
In this work, Ag 3 PO 4 /PANI/Cr:SrTiO 3 photocatalysts were designed to effectively eliminate organic pollutants including Rhodamine B and phenol from high salinity wastewater under visible light . The phase composition , optical properties , and morphology of powders were studied, and the effects of inorganic salts on removal performance of the as-prepared particles were also tested. Results showed that the photocatalytic activities of Ag 3 PO 4 /PANI/Cr:SrTiO 3 composites for Rhodamine B and phenol reached 100% within 10 min and 18 min, respectively. The reaction rate of pure Ag 3 PO 4 was 7 times less than that of the ternary composite with the adding of PANI and Cr:SrTiO 3 . The activity of Ag 3 PO 4 /PANI/Cr:SrTiO 3 remained at 92.25% after five cycles, so the photocatalytic and recyclable performance of ternary composite was greatly improved. In addition, when there was SO 4 2− with a content of ranging from 1% to 21%, the degradation activity of the ternary catalyst under visible light was not changed for Rhodamine B, which indicated that the ternary catalyst exhibited the excellent sulfate resistance ability. Results from ESR and radical trapping experiments showed that O 2 − and h + made an important contribution to visible-light photocatalytic activities .
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PubMed
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Ke Jia,Yawei Wang,Lixia Jiang,Mi Lai,Wenlan Liu,Liping Wang,Huihui Liu,Xiaohua Cao,Yuze Li,Zongxiu Nie
Lung cancer ranks among the cancers with the highest global incidence rates and mortality. Swift and extensive screening is crucial for the early-stage diagnosis of lung cancer. Laser desorption/ionization mass spectrometry (LDI-MS) possesses clear advantages over traditional analytical methods for large-scale analysis due to its unique features, such as simple sample processing, rapid speed, and high-throughput performance. As n-type semiconductors, titanate-based perovskite materials can generate charge carriers under ultraviolet light irradiation, providing the capability for use as an LDI-MS substrate. In this study, we employ Rh-doped SrTiO3 (STO/Rh)-assisted LDI-MS combined with machine learning to establish a method for urine-based lung cancer screening. We directly analyzed urine metabolites from lung cancer patients (LCs), pneumonia patients (PNs), and healthy controls (HCs) without employing any pretreatment. Through the integration of machine learning, LCs are successfully distinguished from HCs and PNs, achieving impressive area under the curve (AUC) values of 0.940 for LCs vs HCs and 0.864 for LCs vs PNs. Furthermore, we identified 10 metabolites with significantly altered levels in LCs, leading to the discovery of related pathways through metabolic enrichment analysis. These results suggest the potential of this method for rapidly distinguishing LCs in clinical applications and promoting precision medicine.
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高影响因子
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