Surfaces and Interfaces
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2023
·
IF 6.2
XiuMin Xu,Faxiang Lu,Yang Cao,Xingfu Zhou
Carbon-based all-inorganic perovskite solar cells are currently emerging as a commercial and promising photovoltaic device . Rutile TiO 2 has the function of UV shielding and preventing the decomposition of perovskite, furthermore, TiO 2 nanorod array provides the direct 1-D electron transmission channel. Herein, vertically oriented rutile TiO 2 nanorods array are synthesized on the FTO substrate by a simple one-step hydrothermal process and used as the electron transfer layer. The analysis of characterization illustrates that the prepared TiO 2 is a flawless single rutile phase. TiO 2 nanorods are employed as an ETL to provide a passage for the rapid and direct charge transfer. The separation of electrons and holes can be enhanced by ammonium acetate treatment of the TiO 2 nanorod ETL/perovskite interface, and the carrier recombination can be efficiently lowered. Based on the structure of FTO/TiO 2 @CH 3 COONH 4 /CsPbI 2.25 Br 0.75 /C, the best device containing 2.5 mg/mL ammonium acetate modified TiO 2 nanorods showed a short-circuit current density of 14.55 mA/cm 2 , open-circuit voltage of 1.08 V, and fill factor of 69.45 %, yielding a power conversion efficiency of 11.53 %, which show an increase in efficiency of approximately 22.4% when compared with the control cell. The results show that ammonium acetate interface modification is an effective strategy to enhance the photovoltaic performance of PSCs.
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Qing Zhou,Xu Zhang,Zhong Wu
The effects of TiO2 and ZnO nanoparticles on soil bacteria and enantioselective transformation of racemic-metalaxyl (rac-metalaxyl) in agricultural soil with or without Lolium perenne were investigated in an outdoor greenhouse. After a 70-day exposure to 2‰ ZnO, microbial biomass carbon decreased by 66% and bacterial community composition significantly changed. Meanwhile, ZnO decreased chlorophyll cumulation in L. perenne by 34%. ZnO also inhibited the enantioselective transformation of metalaxyl enantiomers and changed the enantiomer fraction of metalaxyl. TiO2 showed similar effects but to a lesser extent. L. perenne promoted the transformation of rac-metalaxyl and ingested TiO2 and ZnO. L. perenne changed the bacterial co-occurrence networks and biomarkers in native soil and soil exposed to TiO2 and ZnO. L. perenne reduced the inhibition effects of TiO2 and ZnO on the transformation of rac-metalaxyl. The decrease in the relative abundance of soil keystone taxa such as Acidobacteria and Gemmatimonas might respond to the corresponding slow transformation of rac-metalaxyl in soils exposed to TiO2 and ZnO, regardless of L. perenne. Our results demonstrated the existence of mutual interactions among the impact of engineered nanoparticles on different components (microbes, plants, and coexisting pollutants) in the terrestrial ecosystem.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
·
IF 5.774
Hao Yin,Jie Zhao,Yuqi Li,Yiqiang Liao,Liulian Huang,Hui Zhang,Lihui Chen
Superwetting interfacial porous membranes with different wettabilities have enormous potential for wastewater treatment. The wettability of most smart separation membranes is controlled by external environmental factors such as temperature, pH, and pressure. In a constant environment, they have only one kind of wettability and can separate only one type of emulsion, and in multiple extreme environments, they become “unintelligent” and even lose their separation ability. Inspired by China's “Face-Changing in Sichuan Opera,” we have prepared a novel electrospun SiNPs/ZnNPs-SiO 2 /TiO 2 (SZST) nanofiber membrane by a calcining-spraying method. The obtained membrane can rapidly switch its wettability in various environments for the controllable separation of both oil-in-water and water-in-oil emulsions. The advanced electrospinning, combined with micro-nano hierarchical structures, greatly improved the wettability and porosity of the membrane, making the separation efficiency more than 99% stable. Additionally, the flux was maintained at about 2000 L/m 2 h. Interestingly, the separation efficiency showed almost no change in various harsh environments (e.g., strongly acidic and alkaline conditions, high or low temperatures, and even salty media), and the developed membrane exhibited excellent recyclability. In addition to good corrosion resistance and chemical stability, the membrane demonstrated excellent fire and frost resistance. Therefore, the SZST nanofiber membrane has great practical value in industrial production.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2020
·
IF 3.442
Xiuling Xue,Xiuwen Gong,Xiaoyi Chen,Bor-Yann Chen
In recent years, environmental pollution caused by volatile organic compounds (VOCs) has posed a great challenge to environmental protection. This first-attempt study provided a novel facile chemical precipitation-reduction method to construct Ag/Ag 2 O@TiO 2 (A/AO@TO) photocatalyst for the removal of gaseous toluene. The introduction of Ag in the presence of NaBH 4 with N 2 purging inhibited the passivation of Ag 2 O and thus enhanced the stability of A/AO@TO. A/AO@TO exhibited outstanding photocatalytic performance toward gaseous toluene under different light sources like UV light , simulated sunlight and natural light, which were 99.3%, 48.3% and 28.5%, respectively. The superior photocatalytic performance could be attributed to the synergy effect of p-n heterojunction between Ag 2 O and TiO 2 and the surface plasmon resonance (SPR) effect of Ag, which facilitate the separation of charge carriers and thus suppress the recombination rate of them, and enhance the light response. The active species like ·OH, ·O 2 − and h + were contributed to the excellent photocatalytic performance. The study provided a new method for the fabrication of A/AO@TO photocatalyst and introduce p-n scheme A/AO@TO as a feasible natural sunlight photocatalyst for further applications.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2021
·
IF 5.279
Yu Zhao,Shanji Liu,Yizhou Tang,Tao You,Hengyi Xu
A huge number of titanium dioxide nanoparticles (TiO2 NPs) exist in confectionery foods, which is a high-risk factor for development of diet-induced metabolism syndrome (MetS). In this study, we built a high fructose drinking-induced MetS mouse model, and oral intake of 20 mg/kg TiO2 NPs was administered for 8 weeks. Significant pathological changes and inflammatory factors of overproduction were detected in the liver and colon. The 16S rDNA sequencing analysis results indicated that TiO2 NPs evidently and further perturbed the gut microbiota diversity, compositions, and KEGG pathways in MetS mice. Fecal microbiota transplant experiment proved that TiO2 NPs-altered gut microbiota drives liver and colon inflammation damage. More importantly, oral supplementation of Lactobacillus rhamnosus GG (LGG) ameliorated not only the TiO2 NPs-induced inflammation but also the fructose-caused metabolic abnormality. LGG recovered the gut dysbiosis and decreased the abundance of inflammation-related bacteria (Desulfovibrionaceae, Clostridia, and Proteobacteria), thereby protecting against TiO2 NPs-induced severe inflammation damage. Our study suggests the necessity of assessing the toxic effects of foodborne nanoparticles on the chronic disease population and potential usefulness of probiotics as prophylactic and therapeutic.
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JOURNAL OF MEMBRANE SCIENCE
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2021
·
IF 8.742
Xihang Zhang,Chenjie Wei,Shuyan Ma,Chengxiong Zhang,Yang Li,Dajing Chen,Zhikang Xu,Xiaojun Huang
Janus membranes , with extremely asymmetric wettability , superior flux and rejection, facile fabrication route, and versatile in complex environment, is urgently needed in fields of ideal oil/water separation. In this work, a facile poly (vinylidene fluoride)-graft-(TiO 2 nanoparticles and 1H, 1H, 2H, 2H-perfluorodecyltri-ethoxysilane) (PVDF-g-(TiO 2 -PFDS)) membrane with loose architecture and asymmetric wettability was successfully fabricated by one-step surface grafting and further single-side chemical vapor deposition (CVD) strategies. Amino-functionalized TiO 2 (TiO 2 –NH 2 ) nanoparticles immobilized could not only improve surface energy and roughness of the PVDF-g-poly(acrylic acid) (PAA) membrane, but also decrease pore size adequately. PFDS was further deposited on one side of PVDF-g-TiO 2 NPs membrane for constructing asymmetric interface. The fabricated Janus membrane showed superhydrophilic (a water contact angle of 0°) and superhydrophobic (a stable water contact angle of 151°) properties on forward/reverse surfaces. These characteristics endowed the membrane with high separation flux of ∼2500 L·m -2 ·h -1 under 0.1 MPa, and high rejection rate of above 99.70% for separating surfactant-stabilized dodecane-in-water and water-in-chloroform emulsions, respectively. Furthermore, the PVDF-g-(TiO 2 -PFDS) membrane showed excellent cycling performance during separation process. This work shows a potential way to fabricate Janus membranes with dual wettability for efficient oil/water separation facilely.
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高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 5
·2847-2857
·
IF 4.21
Yang Maiping,Liu Weiqu,Liang Liyan,Jiang Chi,Liu Chunhua,Xie Yankun,Shi Hongyi,Zhang Fengyuan,Pi Ke
Abstract In this work, we proposed a mild and fluorine-free strategy for fabricating robust superhydrophobic coatings with TiO 2 , 3-mercaptopropyltriethoxysilane (MPTS) and polyhedral oligomeric silsesquioxanes using dip-coating and thiol-ene click reaction. The modified cotton exhibited superb superhydrophobicity with a WCA of 157.6°, which showed anti-wetting property in both water and air. Moreover, the durability of the treated cotton against acid and alkaline solutions, different temperatures, abrasion and peeling tests was verified. The highlight is the dual self-cleaning afforded by superhydrophobicity and photocatalytic degradation. The oil red O was adopted as organic pollutant model and could be decomposed completely with the aid of resultant coating after UV irradiation for 3 h. In addition, the modified cotton could be used as filter material and has the potential in the application of oil–water separation. After seven separation cycles, the separation efficiency still maintained 99.0%, while the WCA of cotton kept as high as 154.6°. Therefore, the above-mentioned features demonstrated that this fluorine-free method could reduce the usage of long-chain fluorinated polymers and prepare superhydrophobic cotton which could be applied in self-cleaning as well as oil–water separation fields. Graphic abstract
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JOURNAL OF HAZARDOUS MATERIALS
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2019
·
IF 7.65
Xiangyu Chen,Juanjuan Yao,Bin Xia,Jingye Gan,Naiyun Gao,Zhi Zhang
The influence of pH and dissolved oxygen (DO) on the degradation of ofloxacin (OFX) in water by UVA-LED/TiO 2 nanotube arrays photocatalytic fuel cell (UVA-LED/TNA PFC) was investigated. The degradation pathway depended on the location of OFX frontier orbital with different ionization states and the role of reactive oxidative species (ROSs) played with varied pH and DO values. In presence of DO, the quencher tests revealed that O 2 − played a key role at pH 3.0, 7.0 and 11.0, while OH made its greatest contribution at pH 3.0 and the effect of h + was largely inhibited at pH 11.0. Hydroxylation for cationic OFX was more significant, while demethylation and piperazinyl ring oxidation for anionic OFX occurred more quickly compared to other forms. Besides, zwitterionic OFX underwent decarboxylation and combination of demethylation & hydroxylation more easily. Much higher power generation was observed in presence of DO at pH 7.0, probably due to the enhanced adsorption of OFX on the TNA, and DO could amplify the electric potential between the two electrodes. The degradation efficiencies were almost the same in presence or absence of DO, but the pathways were different and e- aq may replace O 2 - as the leading ROSs in absence of DO.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2019
·
IF 4.182
Hai-Tao Wang,Ya-Pan Liu,Hao Zhang,Na Chang,Wei Shao,Meng-Shan Shi,De Ao,Mei-Chan Lu
With the regular structures composed of metal clusters and organic ligands, metal-organic frameworks (MOFs) are expected to be the competent stabilizing matrix for nanoparticles and the excellent precursor of metal oxide with carbon species by means of high temperature pyrolysis , resulting to porous architectures with unexpected adsorptive or catalytic properties. Herein, we design and propose a facile route for preparing porous Carbon doped ZnO/TiO 2 @ZIF-8 (C–ZnO/TiO 2 @ZIF-8) multi-component nano-platform using TiO 2 coated ZIF-8 as precursor and template followed by thermal calcination . The resulted C–ZnO/TiO 2 @ZIF-8 nanocrystal simultaneously possesses original ZIF-8 morphology and porous structure with connected ZnO nanoparticles. As a result, C–ZnO/TiO 2 @ZIF-8 shows obviously better adsorption affinity towards methylene blue (MB). Moreover, benefit from the TiO 2 coating outside ZIF-8 matrix, escape of carbon species which originate from pyrolysis of organic ligands is efficiently inhibited, with the resulted materials doped with abundant carbon. Therefore, charge transfer and isolation of the resulted catalyst are promoted accordingly, with catalytic activity of the prepared C–ZnO/TiO 2 @ZIF-8 multi-component photocatalyst significantly increased by 1.8-fold and 3.0-fold compared to ZnO@ZIF-8 photocatalyst under irradiation of UV and visible light, respectively.
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BIOSENSORS & BIOELECTRONICS
·
2014
·
IF 6.451
Kai Wang,Xiwen Guan,Shigan Chai,Qichao Zou,Xiuhua Zhang,Jinzhi Zhang
In this study, we designed a novel molecularly imprinted polymer (MIP), oligomeric methyl silsesquioxane (O-MSSQ)–TiO 2 composite sol, which was made using a sol–gel reaction. This polymer has structural rigidity and high surface area of O-MSSQ, as well as high bio-compatibility and relatively good conductivity of the TiO 2 . Next, a sensitive and selective imprinted electrochemical sensor was successfully constructed for the direct detection of procainamide hydrochloride by molecularly imprinting a film onto the surface of a glassy carbon electrode. Adding TiO 2 resulted in a noticeable enhancement in the sensitivity of the MIP sensor. The performance of the O-MSSQ–TiO 2 film was discussed, and the optimal conditions for detection were determined. The oxidative peak current increased linearly with the concentration of procainamide hydrochloride in the range of 4.00×10 −9 –4.97×10 −5 M using differential pulse voltammetry , and the detection limit was 1.30×10 −9 M with S / N =3. Furthermore, the sensor was applied to determine the procainamide hydrochloride content in a human blood serum sample. The recoveries of the sensors varied from 96.77% to 101.35%, indicating that the prepared sensor might be promising for the determination of procainamide hydrochloride in clinical tests. Moreover, the imprinted electrochemical sensor was used to selectively detect procainamide hydrochloride. The analytical application was conducted successfully and yielded accurate and precise results.
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Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 12
·6455-6463
·
IF 7.443
Kunlei Zhu,Xiaoyan Liu,Jiangyong Du,Jianhua Tian,Yun Wang,Shengzhong Liu,Zhongqiang Shan
There are few reports on mesoporous anatase TiO2 nanosheets being synthesized without additives and ex situ templates under mild conditions. In this study, mesoporous single-grain layer anatase (MSGLA) TiO2 nanosheets were first synthesized in situ without additives in a new methanol–tetrabutyl titanate (TBT) system on a large scale using a simple and easily reproducible method. The formation mechanism of the MSGLA TiO2 nanosheets was investigated in detail. The results suggest that MSGLA TiO2 nanosheets can be obtained after a simple thermal treatment of amorphous TiO2 sheets that are converted in situ from the precursor Ti(OC4H9)4−n(OCH3)n (1 ≤ n ≤ 4) (TBM), which is gained easily via the transesterification reactions of TBT and anhydrous methanol at room temperature. Moreover, the MSGLA TiO2 nanosheets were applied successfully as anode materials for Li-ion batteries (LIB) and exhibited a discharge capacity of ∼73 mA h g−1 with obvious voltage plateaus over 4000 cycles (a test time of ∼50 days) at 5 C (1 C = 170 mA g−1) and Coulombic efficiencies of each cycle approaching 100%, highlighting them as promising materials for long-term LIB.
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Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 47
·14963-14972
·
IF 0
Zhifeng Jiang,Xiaomeng Lv,Deli Jiang,Jimin Xie,Danjun Mao
Extending the UV response of anatase TiO2 photocatalysts into the visible light range can play a pivotal role in promoting the practical applications of these catalysts. Nitrogen and carbon co-doped, silver loaded anatase TiO2 (Ag@NC–TiO2) single-crystal nanosheets dominated by {001} facets were prepared for the first time using leaves as the nitrogen and carbon source by a facile, low cost method. The size of the Ag particles on NC–TiO2 nanosheets can be tuned from 1.5 nm to 15 nm using a photo-reduction strategy. The synthesized Ag@NC–TiO2 nanosheets show higher photocatalytic activity in the photodecomposition of organic pollutants compared to NC–TiO2, TiO2 and P25 under visible light irradiation. The enhanced photocatalytic efficiency was ascribed to a synergistic effect between N, C and Ag. In addition, the formed Ag@NC–TiO2 heteronanosheets are highly dispersible in aqueous solution and are capable of efficient catalysis for the reduction of p-nitrophenol. The present synthesis gives a promising method of forming non-metal co-doped, metal nanoparticles (NPs) loaded anatase TiO2 with dominant {001} facets and for broad applications in catalysis and photocatalysis.
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