JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 5
·6682-6687
·
IF 2.478
Liu Zhenjie,Huang Yudai,Wang Xingchao,Zhang Yue,Ding Juan,Guo Yong,Tang Xincun
High performance and low process cost are two contradictory issues, which limited the commercial application of Li 4 Ti 5 O 12 (LTO). Here, defects and TiO 2 co-enhanced LTO have been synthesized by a simple solid-state method. The crystal structure and morphology of the as-synthesized samples were characterized. The results show that the uniform nanoparticles with spinel structure contained defects and TiO 2 . Defects and TiO 2 co-enhanced LTO shows outstanding reversible discharge capacity of 168.2 mAh g −1 at 1 C after 500 cycles. Further, it presents a stability discharge ability of 155 mAh g −1 at 55 °C at 1 C after 500 cycles. The advanced electrochemical performance could be attributed to the defects and TiO 2 in LTO, which enhance conductivity and produce rich reaction interface, facilitating Li + ion diffusion kinetics. The as-synthesized LTO shows high performance in conjunction with low process cost.
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2021
·Vol. 10
·期 5
·986
·
IF 4.35
Yu Zhao,Yizhou Tang,Shanji Liu,Tiantian Jia,Donggen Zhou,Hengyi Xu
The hazard of titanium dioxide nanoparticles (TiO2NPs) in diseased population should be given focus due to the huge number of these NPs in foods and medicine. This study aimed to evaluate the stronger biological adverse effect of oral exposure to TiO2NPs in a fructose-induced metabolic syndrome mouse model. Compared to the normal mice, low-dose (2 mg/kg) TiO2NPs did not cause severe hepatotoxicity. However, high-dose (20 mg/kg) TiO2NPs induced aggravated hepatic inflammation, fibrosis, and apoptosis, with substantial alteration of related biochemical parameters in the mouse model. Moreover, significantly increased Ti and lipopolysaccharide burden were observed in metabolic syndrome murine liver and serum, which possibly worsened the portend intestinal leakage. The expression of tight junction-related protein showed that TiO2NPs induced further increase in serious intestinal permeability. The intestinal inflammatory and oxidative stress response in the model were also assessed. Results showed that TiO2NPs caused more severe intestinal inflammatory injury by intensifying the oxidative stress in metabolic syndrome mice and then induced further liver injury. This work provides information on the insights into the toxic effect of TiO2NPs in sub-healthy population.Keywords:titanium dioxide nanoparticles;fructose;metabolic syndrome;hepatotoxicity;intestinal barrier
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Qian Li,Jing Hu,Haiqiang Wang,Zhongbiao Wu
Limited light absorption and severe charge recombination have been widely acknowledged as the two main obstacles restricting the application of P25 in NO photocatalytic conversion. In this work, an advanced heterojunction photocatalyst of Bi/BiOI/black TiO 2 was synthesized via an in-situ solid-state chemical reduction method. The black TiO 2 extended the light absorption to the full spectral region. It constructed a direct Z-scheme heterojunction with BiOI nanosheets, not only promoting the charge separation, but also preserving the strong oxidation ability of photogenerated holes in black TiO 2 and strong reducing ability of photogenerated electrons in BiOI. Thus, more •O 2 − and •OH radical could form when Bi/BiOI/black TiO 2 was subjected to visible light irradiation. Besides, the introduced Bi metal nanoparticles could also enhance the light utilization and served as a cocatalyst to accept the electrons. Therefore, enhanced NO photocatalytic oxidation activity was obtained, with the optimal sample Bi/BiOI/black TiO 2 exhibiting a high NO conversion efficiency of ~70% and NO x removal of ~45%. This work may provide a refreshing perspective for the design of heterojunction photocatalysts for efficient NO photocatalytic purification and other photocatalytic applications.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Cong Wu,Xinghui Wei,Kang Zhao,Junyi Jiang,Mengzhen Jiao,Junhua Cheng,Zhen Tang,Zheng Guo,Yufei Tang
Nanotube coatings on titanium surfaces have favorable biocompatibility and structures and are widely used in local drug delivery. However, when a drug freely diffuses out of a nanotube, it leads to an explosive release, making the duration of action extremely short. In this study, a high concentration of vancomycin hydrochloride region similar to a dam was formed on a nanotube coating surface by exploiting the attraction of the electric charge generated by the energy conversion of the piezoelectric effect to vancomycin hydrochloride. The “dam” not only reduces the diffusion rate of vancomycin hydrochloride inside the nanotube into the dam and the diffusion rate of the dam to the outside but also forms a high concentration of vancomycin hydrochloride action region. The free diffusion rate of vancomycin hydrochloride loaded on the TiO 2 @ BaTiO 3 coaxial nanotubes was reduced by the piezoelectric effect, and the cumulative release of vancomycin hydrochloride for 7 days is reduced by 54.8%. The polarized vancomycin-containing coaxial nanotube coating has a long-lasting antibacterial effect on Staphylococcus aureus . The TiO 2 @ BaTiO 3 coaxial nanotubes loaded with vancomycin hydrochloride coating with piezoelectric properties has potential application value in controlled drug delivery.
✓ 已验证
产品关联
DOI
高影响因子
Journal of CO2 Utilization
·
2021
·
IF 7.132
Zairong Yan,Qinghe Liu,Lixing Liang,Jing Ouyang
Here we report a Ni/TiO 2 loaded on attapulgite (ATP) composite catalyst with fairly good CO 2 conversion performance amd outstanding reusability (up to 80 h re-use circles) at ambient pressure. The composite was prepared by sol-gel method using ATP powder as the matrix to load TiO 2 and Ni nanocrystals in an equivalent impregnation process. Catalytic activity of the newly synthesized catalysts was investigated towards hydrogenation of CO 2 at atmospheric pressure in varied temperature between 200 and 450 °C. And in the reaction process, the flow rate of CO 2 gas was 2.5 mL/min and the concentration ratio of H 2 : CO 2 is always 4. The GHSV was 30,000 h −1 . Among the investigated catalysts, the 8 % Ni-TiO 2 -ATP catalyst showed preferable activity at 450 ℃. Improved activity and reducibility were found when adding 8 % Ni due to the enhanced CO 2 activation compared with the pure TiO 2 or ATP matrix, as well as with the other Ni dosages. These improvements were obtained probably due to its higher surface area than TiO 2 catalyst, more surface hydroxyls, and better dispersion on the ATP matrix.
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 5
·1335
·
IF 5.076
Zhengpeng Yang,Xiaoting Lv,Xuqing Liu,Shengmin Jia,Yongyi Zhang,Yingying Yu,Chunjing Zhang,Dandan Liu
Continuous-flow photoreactors hold great promise for the highly efficient photodegradation of pollutants due to their continuity and sustainability. However, how to enable a continuous-flow photoreactor with the combined features of high photodegradation efficiency and durability as well as broad-wavelength light absorption and large-scale processing remains a significant challenge. Herein, we demonstrate a facile and effective strategy to construct a sieve-like carbon nanotube (CNT)/TiO2nanowire film (SCTF) with superior flexibility (180° bending), high tensile strength (75–82 MPa), good surface wettability, essential light penetration and convenient visible light absorption. Significantly, the unique architecture, featuring abundant, well-ordered and uniform mesopores with ca. 70 µm in diameter, as well as a homogenous distribution of TiO2nanowires with an average diameter of ca. 500 nm, could act as a “waterway” for efficient solution infiltration through the SCTF, thereby, enabling the photocatalytic degradation of polluted water in a continuous-flow mode. The optimized SCTF-2.5 displayed favorable photocatalytic behavior with 96% degradation of rhodamine B (RhB) within 80 min and a rate constant of 0.0394 min−1. The continuous-flow photodegradation device made using SCTF-2.5 featured exceptional photocatalytic behavior for the continuous degradation of RhB under simulated solar irradiation with a high degradation ratio (99.6%) and long-term stability (99.2% retention after working continuously for 72 h). This work sheds light on new strategies for designing and fabricating high-performance continuous-flow photoreactors toward future uses.Keywords:sieve-like CNT film;TiO2nanowire;continuous-flow device;photodegradation;pollutant
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Wen Zhang,Mingming Gao,Fei Miao,Xiaoyan Wu,Shuguang Wang,Xinhua Wang
Permeable reactive barriers (PRBs) are well-studied and widely-applied technologies in underground water remediation . However, the releasing of chemical substances cannot be avoided during the PRBs operation. In this study, a novel permeable electrochemical reactive barrier (PERB) was fabricated for underground water remediation using a TiO 2 /graphite composite (TiO 2 /C) as the heterogeneous electrocatalyst . TiO 2 /C performed an electro-Fenton-like reaction on cathode and an anodic oxidation on anode respectively, along with the variety of the TiO 2 lattice. The performance of this PERB system was evaluated using tetracycline hydrochloride (TTC) degradation. TTC could be degraded at a low applied potential and a wide range of pH. The degradation rate of about 60% was obtained at the optimized reaction condition: the interelectrode potential difference of 1.2 V, pH 3.0, the anode 10 cm above cathode. The relative position and spacing of the electrodes effected the mass transfer equilibrium of TTC. During the 25-day persistent degradation of TTC, the PERB system shown a perfect stability with rarely leaching of Ti. This work explored the potential for underground water remediation by the electrocatalysis with the goal of establishing a clean and eco-friendly PERB system.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Zhe Wang,Jiangjiang Feng,Xiaoliang Li,Rena Oh,Dongdong Shi,Ouardia Akdim,Ming Xia,Liang Zhao,Xiaoyang Huang,Guojie Zhang
TiO 2 nanocrystals with controlled facets have been extensively investigated due to their excellent photocatalytic performance in sustainable and green energy field. However, the applications in thermal catalysis without applying UV irradiation are comparably less and the identification of their intrinsic roles, especially the different catalytic behaviors of each crystal facet, remains not fully recognized. In this study, bimetallic AuPd nanoparticles supported on anatase TiO 2 nanosheets exposing {0 0 1} facets or TiO 2 nanospindles exposing {1 0 1} as a catalyst were prepared by sol-immobilization method and used for solvent-free benzyl alcohol oxidation . The experimental results indicated that the exposed facet of the support has a significant effect on the catalytic performance. AuPd/TiO 2 -001 catalyst exhibited a higher benzyl alcohol conversion than that of the AuPd/TiO 2 -101. Meanwhile, all the prepared AuPd/TiO 2 catalysts were characterized by XRD , ICP-AES, XPS, BET, TEM, and HRTEM . The results revealed that the higher number of oxygen vacancies in TiO 2 -sheets with the exposed {0 0 1} facets of higher surface energy could be responsible for the observed enhancement in the catalytic performance of benzyl alcohol oxidation. The present study displays that it is plausible to enhance the catalytic performance for the benzyl alcohol oxidation by tailoring the exposed facet of the TiO 2 as a catalyst support.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Jie Yang,Gao Song,Ling Zhou,Xinyue Wang,Lijun You,Jumei Li
In this study, we successfully constructed Ag/TiO 2 core-shell nanoparticles through an easy wet chemistry method for SERS study. Compared to Ag cores, the Ag/TiO 2 core-shell nanoparticles presented higher SERS sensitivity, owing to a synergistic SERS enhancement arising from electromagnetic field effect of Ag cores and chemical enhancement of TiO 2 shells. Furthermore, uniform TiO 2 shells were able to effectively protect the internal Ag cores against destruction in external environment and thus storage stability of Ag/TiO 2 nanoparticles was prominently improved. The as prepared Ag/TiO 2 core-shell nanoparticles were applied to quantitatively sense tetramethylthiuram disulfide (TMTD) in solution using a portable Raman spectrometer. The results showed that the SERS intensity of 563 cm −1 assigned to S-S stretching mode had a good linear relationship with the concentration of TMTD with the correlation coefficient (R 2 ) of as high as 0.99 and the detection limit of as low as 1.15 × 10 −10 M. Consequently, the prepared Ag/TiO 2 nanoparticles present specially advantage of quantifying S-S groups by SERS, because the TiO 2 shell could act as a spacer between Ag cores and TMTD molecules and keep the S-S bonds intact.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Yanqi Lv,Hui Tong,Wanxian Cai,Zhaobin Zhang,Hongling Chen,Xingfu Zhou
Recently, the rapid development of efficient organic-inorganic halide perovskite solar cells (PSCs) has been witnessed extensively. In this study, the TiO 2 nanorod arrays (NAs) with different molar ratios of zinc doping were employed as electron transport layer in carbon-based perovskite solar cells for enhancing photovoltaic performance . Zinc-doped TiO 2 NAs as electron transport and TiO 2 compacted electron blocking layer were simultaneously grown on the fluorine-doped tin oxide glass . Zn-doped TiO 2 NAs show the vertical growth on FTO surface with good crystallinity which provides the direct pathway for the perovskite penetration and the better carrier transfer performance. The surface morphology , crystal structure, absorption and electrical conductivity of Zn-doped TiO 2 NAs are investigated methodically. The reduced contact angle shows the enhanced affinity of Zn-doped TiO 2 with perovskite. Study shows that Zn-doped TiO 2 based PSC device has higher shunt resistance and low series resistance and longer carrier lifetime when compared with pristine sample. The space-charge-limited current (SCLC) measurement demonstrates that 2.5 mol% Zn-doped TiO 2 NAs ETL exhibits higher electron mobility than that of pristine TiO 2 NAs. The increased in J sc of the Zn-doped TiO 2 NAs based cells is mainly ascribed to the reduced trap-state density and enhanced electrical conductivity. As compared with the flat band potential (V FB ) of pristine sample, the V FB of 2.5 mol% Zn-doped TiO 2 NAs has a negative shift of 0.33V, thus resulting in the positive shift of conduction band and better band alignment with perovskite layer. The power conversion efficiency was improved from 12.99% to 14.45% with the optimized zinc doping concentration of 2.5 mol%. Furthermore, the optimized cell without encapsulation still maintains 85% of original efficiency via 30 days stability test.
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2020
·Vol. 9
·期 2
·2000957
·
IF 3.404
Bo Li,Jianhong Zhao,Qingjie Lu,Shiqiang Zhou,Haitang Wei,Tianping Lv,Yumin Zhang,Jin Zhang,Qingju Liu
Applying metal–organic framework (MOF) materials to perovskite solar cells (PSCs) is an innovative and promising direction in the current photovoltaic field, especially in low-cost carbon-based PSCs without hole transport layer. Herein, a novel mesoporous anatase TiO 2 nanocrystalline with pie morphology, large specific surface area (SSA), and outstanding wettability is successfully prepared by sintering the NH 2 -MIL-125 at 500 °C for 6 h. The TiO 2 derived from NH 2 -MIL-125 possesses excellent penetration and crystallinity of perovskite in the electron transporting layer (ETL), and exhibits appropriate work function which matches relatively better with the conduction band of perovskite. Meanwhile, the power conversion efficiencies (PCEs) of the two PSC devices based on the as-prepared TiO 2 are 13.49% and 12.55%, respectively. Moreover, both of these devices exhibit good stability.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xuemei Wang,Lei Yu,Qi Kang,Lu Chen,Yuchen Jin,Guizheng Zou,Dazhong Shen
Perovskite nanocrystals (NCs) are regarded as potential candidates as electrochemiluminescence (ECL) emitters due to their excellent photoluminescence ability. Herein, we report the ECL behavior of FAPbBr 3 NCs (FA stands for CH(NH 2 ) 2 ) in the aqueous media. It was shown that the ECL of FAPbBr 3 NCs can be obtained by hole-injection to oxidize their reduced states, with the emission peak centered around 534±1 nm and the full width at half maximum of 31±0.5 nm. The annihilation ECL of FAPbBr 3 NCs was 4.3± 0.4 folds enhanced by adding 8% (w/w) CNTs. In the presence of tripropanolamine (TPrA) as the co-reactant, the anodic ECL intensity of FAPbBr 3 was enhanced by a factor of 29 in compared with its annihilation ECL. The ECL intensity of FAPbBr 3 NCs was enhanced 4.8 and 10.6 folds by using TiO 2 nanoparticles (NPs) as the co-reaction accelerator and CNTs as the conductivity enhancer, respectively. In the mixture of TiO 2 NPs @FAPbBr 3 NCs @CNTs, the enhancement in ECL intensity of FAPbBr 3 NCs by a factor of 21.6 was obtained. The anodic ECL of TiO 2 NP @FAPbBr 3 NCs @CNTs/GCE was applied to determination dopamine in the linear range of 0.01–10 μM, with the detection limit of 2.9 nM.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）