CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Bo Feng,Kaining Sun,Guangbo Che,Tianyi Yang,Yongya Zhang,Qianqian He,Tianrui Chang,Lijing Wang,Renquan Guan
To address the need for efficient catalysts that excel in persulfate (PDS) activation and carrier extraction, a gadolinium oxide (Gd 2 O 3 ) modified strontium titanate (SrTiO 3 ) photocatalyst has been devised for the photo-Fenton reaction, targeting the degradation of tetracycline and ciprofloxacin. This innovative photocatalyst harnesses the formation of a heterojunction between Gd 2 O 3 and SrTiO 3 , which dramatically enhances PDS activation and boosts carrier extraction efficiency by 6.8 times. Notably, it achieves approximately 90% degradation of tetracycline across various pH levels and approximately 80% degradation of ciprofloxacin under acidic and neutral conditions. Importantly, the photocatalytic treatment significantly mitigates the biotoxicity of the degraded antibiotics, emphasizing its environmental safety and efficacy. The underlying mechanisms of PDS activation and carrier transport have been rigorously verified through theoretical calculations, while the potential photocatalytic pathways and mechanisms of antibiotic degradation have been elucidated using Fukui function analysis and liquid chromatography-mass spectrometry (LC-MS). This comprehensive approach underscores the photocatalyst’s potential for advanced environmental remediation applications.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
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IF 7.2
Xiaoyun Ye,Hangyu Zhong,Yumei Zhang,Yuping Wu,Shuguang Cai,Song Chen,Lian Ma,Qianting Wang
In this work, a ternary Ti 3 C 2 /TiO 2 /SrTiO 3 composite with heterogeneous network structure was prepared by two-step in situ hydrothermal synthesis method, which mainly involved the growth of TiO 2 nanosheets and fibrous SrTiO 3 sequentially on the Ti 3 C 2 substrate using the Ti source inherent in Ti 3 C 2 as the reaction site. The Ti 3 C 2 /TiO 2 /SrTiO 3 heterojunction exhibited enhanced photocatalytic hydrogen evolution activity. When the doping amount of SrTiO 3 was 5 wt%, the hydrogen evolution rate of 5MTS under full solar irradiation reached 14322.6 μmol·g −1 ·h −1 , which was 10.6 times the rate of the Ti 3 C 2 /TiO 2 composite without modified SrTiO 3 . Meanwhile, the 5MTS composites showed good stability in the photocatalytic hydrogen evolution cycle test. The enhanced activity and recyclability are mainly attributed to the strong light absorption ability, fast separation of photogenerated electron-hole pairs, and abundant catalytic active sites. In addition, the synthesis method utilizing an intrinsic Ti source also enhances the interfacial contact between Ti 3 C 2 , TiO 2 , and SrTiO 3 . This study provides an effective reference for the construction of perovskite-based or Ti 3 C 2 co-catalyzed heterostructures and their application for the conversion of solar power to hydrogen energy .
研究领域:
材料科学
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能源科学
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DOI
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Xiaoli Ran,Yang Bai,Hao Zeng,Junhao Zhang,Haitao Fu,Xizhong An,Xiaohong Yang
Introducing oxygen vacancies into perovskite-type SrTiO3 nanoparticles usually takes dual or multiple steps, which are not conducive to subsequent modification and application. Herein, a facile nonstoichiometric method is applied to synthesize a series of oxygen vacancy (VO)-doped SrTiO3 (Sr1–XTiO3–δ) as a photoanode material in photoelectrochemical (PEC) water-splitting reactions. Experimental results reveal a nonlinear relationship between the PEC performance and VO concentration in SrTiO3 nanoparticles. Sr1–XTiO3–δ doped with an appropriate amount of VO can significantly enhance its light response and electrocatalytic activity. The optimal Sr0.95TiO3–δ demonstrated the best PEC activity with an incident photon-to-current conversion efficiency of 3.144 times higher than that of pristine SrTiO3. Enhanced PEC activity is attributed to superior light absorption and retarded photogenerated charge carrier recombination. This work systematically reveals the role of oxygen vacancies in SrTiO3 nanoparticles for achieving enhanced PEC performance in water splitting, which may offer inspiration for defect engineering of perovskite oxides.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
RSC Advances
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2015
·Vol. 5
·期 27
·21290-21296
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IF 3.84
Fanpeng Cai,Yubin Tang,Fangyan Chen,Yan Yan,Weidong Shi
The removal of tetracyclines (TC), the extensively used antibiotics, from the environment has become an important issue. Recently, photocatalytic oxidation on the surface of semiconductors has been found to provide a good tool for the degradation of TC; however, most of these reactions are UV-light driven rather than visible-light driven. Here, Cr doping of SrTiO3 results in a large decrease in the band gap energy, making Cr3+ doped SrTiO3 (Cr-STO) an attractive material for use as a visible-light-driven photocatalyst for tetracycline (TC) degradation. The photoactivity is improved when the Cr/Sr weight ratio changes from 0.5% to 2%, and decreases when the Cr/Sr weight ratio changes from 3% to 10%. In this paper, we also explain the relationship between the doping and the photocatalytic activity. The existence of ˙OH radicals and holes was studied by the electron spin resonance (ESR) spin-trap technique and trapping experiments.
研究领域:
环境科学
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材料科学
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光催化技术
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DOI
高影响因子
RSC Advances
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2018
·Vol. 8
·期 10
·5441-5450
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IF 2.936
Yongmei Xia,Zuming He,Yalin Lu,Bin Tang,Shunping Sun,Jiangbin Su,Xiaoping Li
Novel multifunctional SrTiO3/NiFe2O4 nanocomposites were successfully fabricated via a two-step route. The as-prepared samples were characterized by using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), field-emission transmission electron microscopy (TEM), UV-visible diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy and vibrating sample magnetometry (VSM). The results indicate that the SrTiO3/NiFe2O4 heterostructures are composed of SrTiO3 spheroidal nanoparticles adhered to NiFe2O4 polyhedra. The heterojunction established in the composite material accelerates the process of electron–hole pair separation and boosts the photo-Fenton reaction. Among the samples, 15 wt% SrTiO3/NiFe2O4 nanocomposites exhibit a powerful light response and excellent room temperature ferromagnetism. Subsequently, the photocatalytic degradation of RhB over the as-prepared samples was investigated and optimized, revealing that the 15 wt% SrTiO3/NiFe2O4 nanocomposites exhibit the best photocatalytic activity and stability under simulated solar light irradiation. Furthermore, according to experimental results, the possible mechanism of improved photocatalytic activity was also proposed.
研究领域:
材料科学
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环境科学
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化学
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DOI
PubMed
高影响因子
Journal of Chemistry
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2020
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IF 1.79
Jinghong Li,Lun Zhang,Di Wang,Ran Wang,Xiujuan Liu,Jingxin Zhou
Molybdenum disulfide (MoS2), as a kind of transition metal dichalcogenide, has been widely studied for its excellent compatibility with most of inorganic nanomaterials. Nevertheless, its microscale and agglomeration limit the performance severely. Therefore, the special structure of V-MoS2 has drawn a lot of interest, which can not only reduce the size of MoS2 nanosheets but also improve the valence electron structure of the materials. In this work, SrTiO3@MoS2 composite nanofibers were synthesized by the simple electrospinning and hydrothermal method, and it was applied as a novel material for photodetector. SEM, TEM, EDX, XRD, I-T curves, and EIS analysis were used to study the structure and properties of the prepared SrTiO3@MoS2 composite nanofibers. Simulating under sunlight at a potential of 1.23 V, the prepared composite materials exhibited a superior photoelectric performance of photocurrent density of 21.4 μA and a resistance of 2.3 Ω. These results indicate that the composite of SrTiO3 nanofiber adhered with V-MoS2 has a stable composite structure, good electrical conductivity, and photoelectric sensitivity and is a suitable material for photodetectors. This work provides new ideas for the preparation of self-assembled materials and their application in photodetectors.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2017
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IF 4.784
Ying Wu,Yuelin Wei,Qiyao Guo,Hui Xu,Ling Gu,Feiyue Huang,Dan Luo,Yunfang Huang,Leqing Fan,Jihuai Wu
A series La-doped WO 3 /SrTiO 3 heterojunctions photocatalyst were successfully prepared using solvothermal method . The as-fabricated heterostructures composite included La-doped WO 3 fluff spheres tightly grew on the surface of SrTiO 3 cubic particles. The crystallanity, structural, morphological and optical features of the catalysts were characterized using several techniques including XRD , XPS , SEM, TEM UV−vis and HRTEM. The photocatalytic activity of the heterojunction was evaluated by the photocatalytic degradation of methyl orange (MO) under visible-light irradiation. The influence of La doping and SrTiO 3 molar ratio on heterojunctions photocatalysts was investigated. Among the as-prepared photocatalysts, the LWS50 sample exhibited the highest photocatalytic activity , almost 100% MO were completely decomposed within 75 min under visible light irradiation (λ > 420 nm). Compared with the pure WO 3 and SrTiO 3 , the enhancement of photocatalytic activity was mainly attributed to the three-dimensional hierarchical structure and the effectively transfer and separation of photogenerated electron–hole pairs in La doped WO 3 and SrTiO 3 heterojunctions
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Jie Zhang,Chenhui Qiu,Lei Wang,Ruijie Chen,Jing Ding,Jinfeng Zhang,Hui Wan,Guofeng Guan
Photocatalytic CO 2 reduction presents a promising strategy to alleviate environmental issues caused by massive CO 2 emissions. SrTiO 3 , a potential photocatalyst for photocatalytic CO 2 reactions, is limited by poor photoresponsivity and fast photogenerated carrier recombination. In this work, a series of Cu 2+ species modified SrTiO 3 nanofibers (xCuO/STO) was prepared combining sol-gel method and electrospinning with different copper content. The CH 3 OH yield of the 0.08CuO/STO photocatalyst reached up to 5.75 ± 0.27 μmol g −1 h −1 , which was 2.2 times higher than that of pure SrTiO 3 . It was attributed that the blend electrospinning promoted Cu 2+ species to be well dispersed on the surface of the SrTiO 3 nanofibers. The strategy effectively enhanced the light absorption of the photocatalyst and inhibited the recombination of the photogenerated carriers. Part of appropriate characterizations were employed to elucidate the above point. In addition, to explore the inherent mechanism between the two species, the Density Functional Theory (DFT) calculations were further applied in the inherent mechanism between the species. This work provided a blend electrospinning approach for designing cocatalyst-modified SrTiO 3 nanofibers for photocatalytic reduction of CO 2 .
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Yuying Jiang,Jing Xie,Zhenjiang Lu,Jindou Hu,Aize Hao,Yali Cao
Surface modification by hydrophilic functional group have a tremendous influence on the catalytic activity of photocatalyst , however, there are few reports on improving piezoelectric catalytic performance through surface functionalization . Herein, OH-modified SrTiO 3 was successfully obtained via a novel low-temperature solid-state precursor method and employed as a catalyst for photocatalytic , piezocatalytic and piezo-photocatalytic hydrogen production . Thanks to the super hydrophilic that is facilitating the contact of catalyst and water molecular and the more oxygen vacancies that can promote electron-hole separation, the photocatalytic, piezocatalytic and piezo-photocatalytic hydrogen generation of OH-modified SrTiO 3 (OH-STO) is about two times higher than pristine SrTiO 3 (STO). It is worth mentioning that the optimal piezo-photocatalytic hydrogen evolution rate of OH-STO (701.2 µmol h −1 g −1 ) is 5.3 times higher than the photocatalytic hydrogen evolution process of STO. This study presents a low-energy approach to the rational design of functional group modification nanomaterials that possess excellent piezo-photocatalytic performance.
研究领域:
材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 20
·205604
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IF 3.551
Lun Zhang,Juanjuan Yin,Kuo Wei,Bingfan Li,Tifeng Jiao,Yan Chen,Jingxin Zhou,Qiuming Peng
The construction of low-cost, high-performance electrocatalysts instead of platinum catalysts is critical to solving the energy crisis. Here, using simple electrospinning and hydrothermal methods, new MoS2 nanosheets on SrTiO3 nanofibers (NFs) and 2D SrTiO3@MoS2 heterostructure NFs are synthesized. In addition, SrTiO3@MoS2 heterostructure NFs are compared with bare SrTiO3 NFs and MoS2 nanosheets. Importantly, the prepared SrTiO3@MoS2 heterostructure shows better hydrogen-evolution reaction performance than other MoS2-based electrocatalysts with an overpotential of 165 mV at 10 mA cm−2, a Tafel slope of 81.41 mV dec−1, and long-term electrochemical durability of 3000 cycles. Therefore, the present work strongly demonstrates the positive synergy between SrTiO3 NFs and layered MoS2, and also provides a strategy for preparing low-cost and high-activity water-decomposition electrocatalysts.
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
Sustainability
·
2024
·Vol. 16
·期 10
·3988
·
IF 3.3
Jiantao Niu,Qi Hu
Photocatalytic water splitting by semiconductors is considered a promising and cost-effective method for achieving sustainable hydrogen production. In this study, a CF/SrTiO3/In2O3photocatalytic material with a double-layer core–shell structure was developed. The experimental results indicated that the produced CF/SrTiO3/In2O3composite fiber displayed superior photocatalytic hydrogen production performance, achieving a hydrogen evolution rate of approximately 320.71 μmol/g·h, which is roughly seven times higher than that of the CF/SrTiO3fiber alone. The enhanced photocatalytic activity of the CF/SrTiO3/In2O3fiber can be attributed to the heterojunction structure enriched with oxygen vacancies. It was found that these oxygen vacancies created defective states that served as traps for photogenerated electrons, facilitating their migration to the surface defect states and enabling the reduction of H+in water to produce hydrogen. Furthermore, the synergy between the heterojunction structure and the conductivity of the carbon fiber promoted the generation and migration of photogenerated electrons, reduced the recombination of photogenerated electron–hole pairs, and ultimately improved photocatalytic hydrogen production. This study presents a new approach for designing efficient photocatalysts with surface oxygen vacancies on carbon fibers, providing new insights into the sustainable application of photocatalysts.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2023
·Vol. 17
·期 12
·2300111
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IF 2.8
Peizhuo Chen,Junhu Zhang,Guanzhong Zhou,Wenjing Zhai,Lin Lin,Zhibo Yan,Chao Chen,Xiangping Jiang,Chengliang Lu,Jun-Ming Liu
The anomalous transport phenomena and underlying mechanism of SrTiO 3 have been long term concerned, including the Kondo physics and anomalous Hall effects to be discussed herein. Nevertheless, a clarification of the physical origins for these phenomena and their intertransitions upon varying carrier density remain to be an issue, due to the limited modulation of carrier density. Herein, the intriguing transport behaviors of electrolyte-gated SrTiO 3 in the field-effect transistor geometry are investigated, which allows a relatively wide carrier density window. It is revealed that the remarkable Kondo-like resistance upturn, identified at relatively low carrier density, becomes gradually disappeared and replaced by the emerging nonlinear Hall resistance with increasing gating voltage, indicating the interesting gating-controlled transport behaviors. The detailed discussions on the underlying physics suggest that the gating-controlled transport can be well described by the multiband transport model taking into account magnetic scattering in the channel layer, a comprehensive scenario for the emergent transport effects in carrier-doped SrTiO 3 . The present work provides a promising platform for exploring novel quantum materials phenomena in SrTiO 3 and analogous systems.
研究领域:
凝聚态物理
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材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）