Nano Energy
·
2016
·
IF 11.553
Lin Fan,Yi Ding,Biao Shi,Changchun Wei,Dekun Zhang,Jiangsheng Xie,Xuegong Yu,Baojie Yan,Ying Zhao,Xiaodan Zhang
A thin PC 61 BM buffer layer (BL) has been introduced between TiO 2 electron transporting layer and perovskite absorber in n-i-p planar perovskite solar cells (PSCs). We have found that the elastic nature of the PC 61 BM BL promotes the formation of porous PbI 2−x Cl x thin film with loose structure, which is vital in the following formation of high quality, uniform perovskite films with large grain size. In addition, it has been demonstrated that the thin PC 61 BM BL also flattens the TiO 2 surface, passivates the defects or dangling bands parasitizing on the TiO 2 surface, and optimizes the device band alignment. As a result, the device efficiency has been enhanced dramatically from ~8.37% to 15.44%. Moreover, devices show a good stability over 400 h and reproducibility in 20 pieces fabricated with the same procedure, which implies that this finding is benefit for fabricating highly efficient PSCs. We introduced a thin PC 61 BM buffer layer between the TiO 2 electron transport layer and the perovskite absorber in n-i-p planar perovskite solar cells , which facilitates the construction of a porous PbI 2−x Cl x precursor film, and thus promotes the following realization of high quality, uniform perovskite films with large grain size and improves the solar cell efficiency significantly.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
Materials Today Nano
·
2025
·
IF 8.2
Pingan Chen,Sizeng Hong,Xiangcheng Li,Yingli Zhu,Fu Chen,Mengke Qiao
Carbon nanofibers can be widely used in the field of electromagnetic wave absorption due to corrosion resistance, low density and good chemical stability. Here, we report a strategy to achieve strong microwave absorption capability by adjusting the crystallinity of carbon nanofibers containing Al 2 O 3 and TiO 2 . TiO 2 with Ti 3 C 2 T x MXene as a precursor decreases the crystallization temperature of Al 2 O 3 from 1400 °C to 800 °C in the carbon nanofibers. The diameter distribution of carbon nanofibers is uniform, though the surface of carbon nanofibers is getting rough with Ti 3 C 2 T x content increasing. The minimum reflection loss of carbon nanofibers is -55.78 dB at a thickness of 4.32 mm; the effective absorption bandwidth reaches 5.41 GHz (12.59-18 GHz) at a thickness of 1.67 mm, almost covering the Ku band. The excellent microwave absorption performance can be attributed to the synergistic effect of the non-crystalline carbon matrix and crystalline Al 2 O 3 /TiO 2 , in which the former improves impedance matching with free space, while the latter enhances the attenuation capability to the electromagnetic wave.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Mingyu Zhang,Mohammed Kamal Hadi,Dongli Guo,Tao Yao,Fen Ran
In recent years, a series of high-performance ultrafiltration membranes have been developed, but maintaining high flux and high pollutant retention rate without sacrificing service life remains a long-standing challenge. In this study, a porous polyethersulfone ultrafiltration membrane enriched with ZIF-8 and TiO 2 additives is prepared based on a non-solvent induced phase separation method. During the phase transition process, the addition of organic nanocrystals ZIF-8 and inorganic nanocrystals TiO 2 delayed the phase transition rate, resulting in the transformation of the polyethersulfone modified membrane from a finger-like pore structure to a sponge-like pore structure. Compared to other structures, the sponge-like modified membrane has a uniform and narrow pore size distribution, fewer surface defects, stable retention performance, and can simultaneously improve membrane permeability and mechanical strength. Therefore, the polyethersulfone modified membrane with a sponge-like pore structure prepared in this research exhibits high flux for small molecules and good retention rate for large molecules. Long-term cycling stability tests of the modified membrane shows high retention rate (over 98%), high flux, long service life, and good cycling stability for solute molecules. The study indicates that the prepared polyethersulfone modified membrane has high potential for application in relevant environmental separation processes.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Y. Lu,S. Khan,C.L. Song,K.K. Wang,G.Z. Yuan,W. Li,G.R. Han,Y. Liu
The column-structured Nb-doped TiO 2 (TNO) films with various Nb concentrations in the range between 0 and 10 at.% have been prepared by a sol–gel method. The phase compositions, element concentrations, microstructures, and optical-electron properties have been characterized by using X-ray diffraction, X-ray photoelectron spectroscopy, electron microscopy , and UV/Vis/Near-IR spectrophotometer. The experimental results show that all of the samples prepared in the present work exhibit column-structured morphology and Nb doping concentration has a non-monotonic effect upon the microstructure. The relatively low conductivity and high transmittance of the samples demonstrate that column-structured microstructures greatly improve the optical and electronic properties of TNO films. The favorable sample with 10 at.% Nb doping concentration exhibits a resistance of about 2.27 Ω cm and transmittance of approximately 68.78% with 85 nm thickness.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Yunlai He,Zuheng Jin,Sha Wu,Chuan Jiang,Changzheng Hu,Laijun Liu
The development of science and technology has brought convenience to our life, however, the CO2 emission in industrial production has aggravated the greenhouse effect and brought great damage to the ecological environment. Therefore, this study investigated the reduction process of CO2 under the condition of tribocatalysis. The effect of the rotational speed of the magnetic stirrer, the content of catalyst, the type of sacrificial agent, the reaction time and the initial CO2 content on the tribocatalytic CO2 reduction products was investigated by using nano-TiO2 (P25) as a catalyst. Under the optimal conditions, replacing the reaction solution H2O with difficult-to-degrade rhodamine B, methylene blue and methyl orange solutions further increased the contents of CO2 reduction products: CO (124 μmol h–1 g–1), C2H6 (49 μmol h–1 g–1), CH4 (24 μmol h–1 g–1), C2H4 (3 μmol h–1 g–1) and H2 (2 μmol h–1 g–1). The dual control of organic pollutants and CO2 emission problems was realized. Finally, the active substances (e–, •OH and •O2–) in the tribocatalytic process were proved to be the key for efficient CO2 reduction and realization of organic pollutants by electron paramagnetic resonance spectroscopy tests. The method also has a great potential to crack H2 in H2O, which can alleviate the greenhouse effect caused by CO2 emission and effectively deal with water pollutants and regenerated new energy, which is in line with the national requirements of the circular economy, and is also conducive to the promotion of the sustainable and healthy development of the energy industry.
研究领域:
环境科学
·
催化化学
·
纳米材料
·
能源化学
·
污染控制
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 11
·9260-9268
·
IF 3.201
Hao Ju,Yinshan Jiang,Bing Xue,Yuanjun Xu,Honggang Guo,Mingyuan Huo,Fangfei Li
Illite/TiO2 nanocomposites have been successfully synthesized by the hydrothermal method. Phase and microstructural analysis confirmed that TiO2 nanocrystals were loaded on the surface of illite with a strong chemical bond. The as-prepared illite/TiO2 samples presented high UV shielding performance with increasing TiO2 content. The PIT-50% sample exhibited the best UV shielding performance, blocking almost 100% of UVC, over 98% of UVB and nearly 60% of UVA while having poor photocatalytic activity. Furthermore, the illite/TiO2 powders were dispersed more homogeneously on the matrix when compared to TiO2, and their photocatalytic activity could be adjusted to a suitable range to achieve better UV shielding performance. Therefore, unlike the traditional rutile UV blocker, this novel illite/anatase blocker can display desirable UV shielding properties, especially at longer irradiation times, and the fabric maintained 71.35% tensile strength after the UV aging test with half the amount of TiO2. All these results indicate that illite/anatase nanocomposites are promising UV shielding materials for textiles and polymers, with regard to both cost and performance.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Huimin Hao,Ji-Long Shi,Hui Xu,Xia Li,Xianjun Lang
TiO 2 is the most established semiconductor photocatalyst . The prominence of TiO 2 is becoming increasingly obvious because its interfacial redox reactions have implication on a wide range processes such as energy conversion and environmental remediation. Herein, we exploited the surface complex created by the interaction between organic molecules with binding sites and accommodating surface of TiO 2 for visible light-driven selective aerobic oxidation reactions. A novel surface complex formed between N -hydroxyphthalimide (NHPI) and TiO 2 was discovered. The NHPI-TiO 2 complex turned out to be an outstanding visible light photocatalyst and was successfully used in the selective oxidation of amines into imines with atmosphere O 2 under blue LED irradiation. The stability of the NHPI-TiO 2 complex was preserved by 3 mol% of (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) acting as a cooperative catalyst. Moreover, selectivities for the imine products were also promoted by TEMPO. Superoxide anion radical (O 2 − ) were evidenced to be the primary reactive oxygen species (ROS) to execute the oxidative conversions. This work suggests that TiO 2 surface complexes can be robust photocatalysts for visible light-driven selective aerobic reactions, provided that an appropriate cooperative redox catalyst exists to channel the photocatalytic electron transfer.
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Ensi Cao,Yixuan Zhang,Yongjia Zhang,Wentao Hao,Bing Sun,Li Sun
To enhance the acetone sensing capabilities of LaFeO 3 nanoparticles for practical applications in breath analysis, commercial n-type rutile TiO 2 nanoparticles were utilized as additives and directly mixed with LaFeO 3 nanoparticles synthesized via a sol–gel method. The obtained TiO 2 -LaFeO 3 nanocomposites were characterized by XRD, SEM, BET, and XPS. Compared to pure LaFeO 3 nanoparticles, the resulting TiO 2 -LaFeO 3 nanocomposites exhibited higher surface reactivity, as evidenced by their larger specific surface areas and higher oxygen vacancy contents. The introduction of TiO 2 also facilitated the formation of p-n heterojunctions, which enhanced the regulation of acetone molecules on internal carrier conduction within the nanocomposites. Therefore, the TiO 2 -LaFeO 3 nanocomposites demonstrated improved acetone sensing performance, including higher vapor response values, selectivity, and faster response/recovery speeds. Among the series of nanocomposites, those with an addition of 10 wt% TiO 2 exhibited the highest vapor response value (37.3 to 100 ppm) and the greatest selectivity against methanol and ethylene glycol at the prime operating temperature of 144 °C.
研究领域:
材料科学
·
纳米技术
·
传感器
·
表面化学
·
呼吸分析
✓ 已验证
DOI
高影响因子
Small Methods
·
2026
·Vol. 10
·期 11
·e02408
·
IF 8.7
Chenbo Li,Zhenyu Li,Guangyong Li,Xuetong Zhang
Two-dimensional (2D) nanomaterials offer exceptional properties for constructing advanced macroscopic materials. However, when assembled into 3D architectures, nanosheet stacking often restricts mass transport and reduces accessible active sites. Introducing in-plane pores in 3D macroscopic materials constructed with 2D nanomaterials has still faced great challenge. Herein, we present a monolithic holey 2D TiO 2 aerogel composed of graphene-like nanosheets, successfully synthesized via a one-step “chemical vapor infiltration-deposition” coupling with “template-removal-driven crystallization under spatial confinement” strategy. This aerogel integrates a crystalline anatase framework with a unique 2D holey building morphology (exposing the {111} facet), a high specific surface area, and abundant surface defects (oxygen vacancies and Ti 3+ ). It thus demonstrates excellent performance in photocatalytic degradation and UV shielding, outperforming conventional sol-gel-derived TiO 2 aerogels composed of nanoparticle aggregates. Moreover, this aerogel shows promise as a candidate for wave-transparent materials. Our strategy concurrently achieves pore creation, crystallization, and 3D structuring, moving beyond the conventional “sheet-first, pore-later” sequence and opening one door for synthesizing advanced porous oxide nanosheets and their macro-architectures.
✓ 已验证
DOI
PubMed
高影响因子
International Journal of Environmental Research and Public Health
·
2019
·Vol. 16
·期 4
·523
·
IF 2.468
Tianle Tang,Zhang Zhang,Xiaopeng Zhu
Titanium dioxide nanoparticles (TiO2NPs) have become a widely used nanomaterial due to the photocatalytic activity and absorption of ultraviolet light of specific wavelengths. This study investigated the toxic effects of rutile TiO2NPs on zebrafish by examining its embryos and adults. In the embryo acute toxicity test, exposure to 100 mg/L TiO2NPs didn’t affect the hatching rate of zebrafish embryos, and there was no sign of deformity. In the adult toxicity test, the effects of TiO2NPs on oxidative damage in liver, intestine and gill tissue were studied. Enzyme linked immunosorbent assay (ELISA) and fluorescence-based quantitative real-time reverse transcription PCR (qRT-PCR) were used to detect the three antioxidant enzymes: superoxide dismutase (SOD), catalase (CAT) and glutathione S transferase (GSTs) in the above mentioned zebrafish organs at protein and gene levels. The results showed that long-term exposure to TiO2NPs can cause oxidative damage to organisms; and compared with the control group, the activity of the three kinds of enzyme declined somewhat at the protein level. In addition, long-term exposure to TiO2NPs could cause high expression of CAT, SOD and GSTs in three organs of adult zebrafish in order to counter the adverse reaction. The effects of long-term exposure to TiO2NPs to adult zebrafish were more obvious in the liver and gill.Keywords:TiO2NPs;zebrafish;oxidative damage;quantitative real-time reverse transcription PCR (qRT-PCR)
研究领域:
环境毒理学
·
分子生物学
·
水生毒理学
✓ 已验证
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2020
·
IF 5.825
Tingsong Zhang,Mingze Xu,Jinhua Li
Al nanoparticles composited with TiO 2 (Al-NPs/TiO 2 ) has drawn considerable attention over the years due to the localized surface plasmon resonance (LSPR) effect of Al-NPs can significantly enhance the photocatalytic efficiency of TiO 2 . However, most of the Al-NPs were obtained on Al substrates which limited its practical application. Herein, the isolated Al-NPs were composited together with the TiO 2 by using glutathione (GSH) as linking bridge in aqueous environment. Finite difference time domain (FDTD) simulation was used to reveal the LSPR absorption of Al-NPs. The results show that the LSPR of 70 nm Al-NPs have a strong coupling with the TiO 2 band gap. The X-ray diffraction analysis and TEM images show that our sample are pure, and the TiO 2 indeed composite on the surface of Al-NPs under the action of GSH ligand bridge as seen in the TEM images. This ligand bridge was further verified by the FTIR and XPS measurements. The EPR experiment indicate the OH signals of Al-NPs/TiO 2 are higher than that of pure TiO 2 because of enhanced charge separation and transfer. The photodegradation experiment show that Al-NPs/TiO 2 can rapidly degrade the concentration of methylene blue (MB) to zero under UV–vis light illumination in 70 min. All the above results indicate that the Al-NPs can significantly enhance the photocatalytic efficiency of TiO 2 which due to the LSPR effect of Al.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2012
·
IF 2.289
Y.T. Zheng,Z.L. Zhang,Y.L. Mao
A composite of SrTiO 3 /TiO 2 was successfully prepared using TiO 2 (Degussa P25) and SrTiO 3 powders as starting materials. The composite was characterized by X-ray diffraction (XRD), UV–vis absorption spectrum, scanning electron microscope (SEM), and surface photovoltage spectroscopy (SPS). The SrTiO 3 /TiO 2 composite presents an enhanced photovoltaic response compared with pure TiO 2 and SrTiO 3 . The enhancement was explained by investigating the energy levels of TiO 2 and SrTiO 3 , and the photoluminescence (PL) spectra of TiO 2 , SrTiO 3 and SrTiO 3 /TiO 2 . The analysis of energy levels shows that those of TiO 2 and SrTiO 3 are matching, which improves the separation efficiency of photogenerated carriers. The PL spectra indicate that the formation of SrTiO 3 /TiO 2 composite decreases the recombination rate of photogenerated carriers. Thus the photovoltaic response enhancement is mainly resulting from the improved separation efficiency and decreased recombination rate of photogenerated carriers for SrTiO 3 /TiO 2 composite.
✓ 已验证
产品关联
DOI
高影响因子
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