JOURNAL OF ELECTRONIC MATERIALS
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2022
·Vol. 51
·期 11
·6121-6133
·
IF 2.047
Mou Jiaxin,Xu Yunlan,Zhong Dengjie,Chang Haixing,Xu Chunzi,Wang Hui,Shen Hongyu
In order to enhance the photoelectric conversion efficiency of a photoanode and broaden its light absorption range, a ZnIn 2 S 4 /UiO-66/TiO 2 /Ti composite photoanode was developed. The maximum photocurrent density of the prepared photoanode is 2.56 mA cm −2 at 1.2 V (versus SCE), which is 1.79 times higher than that of ZnIn 2 S 4 /TiO 2 /Ti. The rhodamine B (RhB) removal rate, short-circuit current density and maximum power density of a photocatalytic fuel cell (PFC) constructed with the ZnIn 2 S 4 /UiO-66/TiO 2 /Ti photoanode and a Cu cathode are 98.01%, 0.22 mA cm −2 and 16.97 μW cm −2 respectively. The enhancement of the PFC performance is mainly attributed to the extremely good energy band matching and nano-size interface contact between ZnIn 2 S 4 and UiO-66. The existence of UiO-66 can be as an electronic transmission bridge, which not only facilitates the rapid transfer and utilization of photogenerated electrons, but also improves the adsorption ability of the photoanode for RhB molecules. Graphical Abstract
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Danwen Yao,Zhenyu Hu,Liansheng Zheng,Shanming Chen,Wei Lü,Huailiang Xu
The research deals with fabrication of CdS/CdSe-sensitized quantum dot sensitized solar cells (QDSSCs) with laser-engineered black rutile TiO 2 nanoparticles (TiO 2 -NPs) as the photoanode material. Three QDSSC devices with pristine and two types of black rutile TiO 2 -NPs engineered respectively in water and ethanol by intense femtosecond laser propagating in the filamentation regime were prepared in the same architecture. Extremely different power conversion efficiencies (PCE) of 1.43 %, 3.68 % and 9.11 %, in which the black TiO 2 -NPs-based devices show respectively a two-fold and six-fold PCE higher than the pristine TiO 2 -NPs, were obtained. The absorption and electrochemical impedance spectroscopy analyses revealed that the device with the highest PCE has the highest absorption efficiency in the wide spectral range from UV to mid-infrared and shunt resistance ( R sh ) of 1364.9 Ω, but the smallest series resistance ( R s ) of 190.3 Ω, which are attributed to the surface modification on the structural and optical properties of TiO 2 -NPs by femtosecond laser pulses.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 32
·e52750
·
IF 3.057
Jingjing Li,Yihua Cui,Kangle Wu,Chuangchuang Sun
UV curing three-dimensional printing (3DP) technology has been developing rapidly due to its high molding accuracy and low cost. However, the curing shrinkage rate of the existing UV curing 3DP materials is still high. The use of inorganic particles to reduce the curing shrinkage of 3D printing materials has received more and more attention in recent years, but the poor dispersibility of inorganic particles in the photosensitive resins has not been effectively solved. In this paper, nano-TiO 2 particles were treated by KH570 in advance and the surface of which were grafted by thiol-terminated hyperbranched polymer (THBP), hereby THBP@TiO 2 was obtained. The results showed that by incorporating of 5 wt% THBP@TiO 2 , the volume shrinkage rate of epoxy acrylate (EA)-based photosensitive resins decreased from 8.95% to 4.18%. The THBP@TiO 2 combined the anti-shrinkage mechanism of thiol-based hyperbranched polyester with that of and inorganic nanoparticles. Otherwise, surface grafting of THBP may effectively improve the dispersibility of nano-TiO 2 particles in EA-based photosensitive resin by reducing the nano-TiO 2 particles surface energy, and increase the load transfer capacity. The impact strength of 5 wt% THBP@TiO 2 modified photosensitive resin increased from 11.2 to 18.1 kJ/m 2 .
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Chentao Hou,Yijie Li,Miaomiao Niu,Yi Liu,Xianghui Kong,Mingyuan Zhang,Liping Wang
Photocatalysis is still a promising technology to alleviate the antibiotic residual problem of wastewater in the ecological environment. Herein, an all-solid-state Z-scheme Ag@Ag 3 PO 4 /TiO 2 -(F 2 ) (TFAP) heterojunction photocatalyst was constructed using the hydrothermal method for the first time. The photocatalytic performance of TFAP nanocomposites for tetracycline hydrochloride (TCH) degradation was evaluated under simulated sunlight. The prepared materials were characterized by XRD , FE-SEM, TEM , BET, FT-IR, UV vis DRS , XPS , PL, and ESR measurements. The TFAP nanocomposites showed high degradation efficiency and excellent repeatability to TCH destruction. Among them, the (TFAP 1–1) nanocomposite has a lower bandgap energy (1.80 eV), a larger specific surface area (53.48 m 2 /g), and a lower electron-hole recombination rate. After 2.5 h of simulated sunlight irradiation, the degradation rate of the 200 mg/L (TFAP 1–1) nanocomposite (k = 0.0154 min −1 ) to 10 mg/L TCH reached 94.14%, which was much higher than that of the pure TiO 2 , TiOF 2 , and Ag 3 PO 4 samples. The experimental results demonstrated that TiO 2 was generated as an intermediate product during the chemical reaction process between Ag 3 PO 4 and TiOF 2 . Additionally, Ag nanoparticles were formed in the Ag 3 PO 4 /TiO 2 /TiOF 2 heterojunction system. An electric field was formed between Ag 3 PO 4 and Ag, enhancing the visible light absorption ability. Because of the Schottky potential difference, the electrons accumulate in Ag nanoparticles, thus enhancing the photocorrosion resistance of Ag 3 PO 4 . Additionally, the localized surface plasmon resonance (LSPR) effect of Ag nanoparticles greatly promoted the separation of carriers at the interface of the heterojunction. The LSPR effect leads to the co-oscillation of free electrons, which leads to the strong absorption of electromagnetic energy and enhances the photocatalytic performance of the heterojunction. The Ag@Ag 3 PO 4 nanocomposites acted as electron transport media for an all-solid-state Z-scheme TFAP heterojunction system. This study provides some in-depth insights into the structural design of Z-scheme heterojunctions, which have certain implications for other catalytic systems.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lijun Luo,Demei Meng,Lijin He,Xiaoxia Wang,Lihong Xia,Xuejun Pan,Fengzhi Jiang,Hongbin Wang,Jianhui Dai
A new porous C 3 N 4 /reduced graphene oxide/TiO 2 nanobelt catalyst (CRT) was assembled and used to remove 17α-ethinylestradiol (EE2) in the presence of peroxydisulfate (PS) and visible light. The characterization results showed that larger porous graphite carbon nitrides (pg-C 3 N 4 ) covered onto the surface of TiO 2 /reduced graphene oxide (RGO), in which layered RGO was wrapped onto the surface of anatase TiO 2 nanobelt uniformly. The layered RGO in CRT played significant role in separation of electron-hole pairs and nonradical activation. The electron paramagnetic resonance and quenching experiment revealed that h + , 1 O 2 and •O 2 – and direct electron transfer route contributed to complete removal of 6 mg/L EE2 within 6 min only with 0.5 g/L dosage and 1 mM PS. The degradation rate of EE2 in CRT/PS/Vis was 207.51 times than that in photocatalysis. The degradation products were identified by a solid phase extraction pretreatment method combined with ultra-high-performance liquid chromatography-mass spectrometry, and possible degradation pathways were proposed. Moreover, the estrogenic activities can be rapidly eliminated in CRT/PS/Vis process.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Zhao-huan Zhang,Junjie Hu,Han Zhu,Qiang Chen,Kwangnak Koh,Hongxia Chen,Xiao-hui Xu
Alzheimer’s disease (AD) is one of the most prevalent neurodegenerative disease. Plasma total phosphorylated tau (P-tau) with multi-phosphorylation sites is a potentially efficient biomarker for the diagnosis and prognosis of AD. Single phosphorylation site recognition methods lead to the false positive detection of P-tau and decrease the accuracy of AD analysis. In this work, a simple and precise electrochemical immunoassay was developed for the specific detection of P-tau. Calixarene derivative ProLinker was utilized to orient Anti-tau onto the surface of gold electrode. ProLinker provide abundant binding sites for immobilized antibodies via host-guest recognitions and ensure Anti-tau activity through non-covalent interactions. Flower-shaped TiO 2 (F-TiO 2 ) forming coordination bonds with the phosphate group of phosphorylated protein were utilized as signal amplification tags to construct a simple sandwich assay for multiple phosphorylated sites sensing of P-tau. The combination of F-TiO 2 and Anti-tau ensured the bispecific and precise recognition of P-tau with a wide detection range (1–200 ng/mL) and a low detection of limit (1.774 pg/mL). With large specific surface area, high electron hinder ability, and great stability, F-TiO 2 as an amplification molecule can improve the performance of the immunosensor and produce sensitive signal changes according to the concentration of P-tau in the clinical samples. Hence, this P-tau immunoassay paves the way for the development of efficient detection tools for clinical diagnosis and monitoring.
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Journal of Materials Research and Technology-JMR&T
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2022
·
IF 6.267
Haimeng Huang,Yuanyuan Xu,Zhiyong Lu,Aihua Zhang,Daofeng Zhang,Huapeng Xue,Ping Dong,Jianfeng Zhang,Takashi Goto
To conquer the trade-off dilemma of the nanofiltration membranes for both high permeability for water and high rejection for pollutants has long been highly concerned. In this work, TiO 2 and Bi 2 S 3 nanoparticles were evenly dispersed successively into the interlayers of Ti 3 C 2 T x nanosheets, and then filtered onto cellulose acetate support membranes. The as-obtained composite membranes exhibited a maximum water flux of 374.4 L m −2 h −1 bar −1 , and a high rejection ratio for RhB, GR, MB and BSA at 97.8–100%, apparently higher than those of the Ti 3 C 2 T x and the related membranes in literature. Such a high separation capacity was found quite stable for various dye-containing aqueous solutions, even in a high salinity environment of 5 wt% NaCl. Interestingly, 25% NaCl salt was also rejected accompanying the almost complete rejection of dye pollutants. After the filtering process, the membrane fouling of fouled Ti 3 C 2 T x /TiO 2 /Bi 2 S 3 membranes was verified quite lower than that of fouled Ti 3 C 2 T x /TiO 2 and Ti 3 C 2 T x membranes. Furthermore, the flux recovery rate of the fouled composite membrane could reach 92.1% after washing under visible light, which could be ascribed to the composition of heterojunction causing the red shift of diffuse reflectance UV–vis spectra and the narrowing of the band gap. This study provides a new idea for the preparation of highly permeable and rejective nanofiltration membranes, and lays a foundation for its high-capacity dye removal applications.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Xingmin Liu,Jianfeng Zheng,Kun Peng,Guozhen Qin,Yatao Yang,Zhanggen Huang
Constructing effective photocatalysts with visible-light-driven for degrading VOCs including formaldehyde remains a challenge. The TiO 2 (B) photocatalyst with a two-dimensional lamellar structure was prepared and modified by surface engineering. The DFT calculation results showed new impurity levels appeared among the energy bands of the modified TiO 2 (B) materials. These photocatalysts exhibited different rates of HCHO degradation under visible light. A variety of characterizations demonstrated that the surface defects greatly reduced the bandgap and enhanced the absorption of visible light. And the recombination of photogenerated electron-hole (e - -h + ) pairs was suppressed to varying degrees in the modulated TiO 2 (B) catalysts revealed in the photoelectrochemical analysis. It is necessary to match the band structure of photocatalysts with the frontier orbital of HCHO for achieving effectual photocatalytic oxidation (PCO). Remarkably, the separation and transport of photogenerated carriers were inhibited when excessive metal Cu was doped. The results in this work provide a deeper understanding of the relationship between the surface engineering of TiO 2 (B)-based catalysts and catalytic performance.
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Membranes
·
2023
·Vol. 13
·期 5
·514
·
IF 4.2
Yinghao Lin,Atian Xie,Jian Xu,Changguo Xue,Jiuyun Cui,Jianming Pan
Oil pollution caused by a large number of industrial activities and oil spill accidents has posed serious harm to the environment and human health. However, some challenges remain with the existing separation materials, such as poor stability and fouling resistance. Herein, a TiO2/SiO2fiber membrane (TSFM) was prepared by a one-step hydrothermal method for oil-water separation in acid, alkali, and salt environments. The TiO2nanoparticles were successfully grown on the fiber surface, endowing the membrane with superhydrophilicity/underwater superoleophobicity. The as-prepared TSFM exhibits high separation efficiency (above 98%) and separation fluxes (3016.38–3263.45 L·m−2·h−1) for various oil-water mixtures. Importantly, the membrane shows good corrosion resistance in acid, alkaline, and salt solutions and still maintains underwater superoleophobicity and high separation performance. The TSFM displays good performance after repeated separation, demonstrating its excellent antifouling ability. Importantly, the pollutants on the membrane surface can be effectively degraded under light radiation to restore its underwater superoleophobicity, showing the unique self-cleaning ability of the membrane. In view of its good self-cleaning ability and environmental stability, the membrane can be used for wastewater treatment and oil spill recovery and has a broad application prospect in water treatment in complex environments.
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PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2023
·Vol. 29
·期 64
·e202301774
·
IF 4.3
Lian Li,Kaizhao Wang,Kaijun Wang,Tianyou Chen,Jing Wang,Zhongshan Deng,Qingming Chen,Weijun Zhang,Jin Hu
Graphical The amorphous titanium dioxide is used to coat eGaSn nanodroplets (eGaSn NDs) to construct the core-shell structure of eGaSn@TiO 2 nanodroplets (eGaSn@TiO 2 NDs). The amorphous TiO 2 shell forms a stable SEI film, alleviates volume expansion, and provides electron/ion transport channels. The resulting eGaSn@TiO 2 NDs exhibit high capacities of 580, 540, 515, 485, 456 and 426 mAh g −1 at 0.1, 0.2, 0.5, 1, 2 and 5 C, respectively. No obvious decay is observed in more than 500 cycles with a capacity of 455 mAh g −1 at 1 C. Gallium-based alloy liquid metal batteries currently face limitations such as volume expansion, unstable solid electrolyte interface (SEI) film and substantial capacity decay. In this study, amorphous titanium dioxide is used to coat eutectic GaSn nanodroplets (eGaSn NDs) to construct the core-shell structure of eGaSn@TiO 2 nanodroplets (eGaSn@TiO 2 NDs). The amorphous TiO 2 shell (~6.5 nm) formed a stable SEI film, alleviated the volume expansion, and provided electron/ion transport channels to achieve excellent cycling performance and high specific capacity. The resulting eGaSn@TiO 2 NDs exhibited high capacities of 580, 540, 515, 485, 456 and 426 mAh g −1 at 0.1, 0.2, 0.5, 1, 2 and 5 C, respectively. No significant decay was observed after more than 500 cycles with a capacity of 455 mAh g −1 at 1 C. In situ X-ray diffraction (in situ XRD) was used to explore the lithiation mechanism of the eGaSn negative electrode during discharge. This study elucidates the design of advanced liquid alloy-based negative electrode materials for high-performance liquid metal batteries (LMBs).
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JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Kaixuan Wang,Kun Zhao,Xin Qin,Shuo Chen,Hongtao Yu,Xie Quan
Electrochemical anodic oxidation (AO) is a promising technology for wastewater treatment due to its strong oxidation property and environmental compatibility. However, it suffers from high energy consumption for pollutants removal due to the side-reactions of hydrogen evolution reaction on cathode and oxygen evolution reaction on anode. Combining electro-Fenton (EF) with AO not only generated •OH for pollutants degradation but also increased current efficiency. This work investigated a synergic electrocatalysis process between EF and AO with Ti 3+ self-doped TiO 2 nanotube arrays (Ti 3+ /TNTAs) electrode as both cathode and anode for wastewater treatment. The pseudo-first-order kinetic rate constant of phenol degradation by EF+AO (0.107 min −1 ) was 9.7 or 6.3 times as much as that of only EF (0.011 min −1 ) or AO (0.017 min −1 ) process, respectively. Enhanced pollutants removal of EF+AO could be attributed to the coexistence of •OH oxidation and direct oxidation on Ti 3+ /TNTAs surface. The COD of secondary effluent of coking wastewater decreased from 159.3 mg L −1 to 47.0 mg L −1 by EF+AO within 120 min with low specific energy consumption (9.5 kWh kg −1 COD −1 ). This work provided a new insight into design of the energy-efficient synergic electrocatalysis process for refractory pollutants degradation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yu Liu,Yu Xiang,Hui Xu,Huili Li
Photocatalysis is highly efficient for the treatment of dyeing wastewater. However, the wastewater still contains a large amount of nano-TiO 2 after photocatalysis. In order to reduce the cost of nano-TiO 2 , different coagulants were used to improve the solid/liquid separation efficiency. At the same time, the reuse of flocs has raised increasing attention after coagulation. In this study, we report on the recycling of flocs for the production of AlCl 3 and TiO 2 formed flocs (AT 1 ) and Al 13 and TiO 2 formed flocs (AT 2 ) through a simple calcination process. Results indicated the flocs formation processes under different concentration of CO 3 2– were Al species distribution and coagulant dosage dependent. Without HA molecules, the reaction between Al-based coagulants and CO 3 2– are the controlling steps in the coagulation process, and Al a and Al b species had different reaction processes. The influence of HA molecules was also studied, and the HA-Al aggregates which could bridge the TiO 2 nanoparticles , and thus induce sweep flocculation . Consequently, highly enhanced aggregation rate, due to the heteroaggregation between these aggregates and TiO 2 was observed. After calcination, the AT 2 -10 and AT 2 -20 (CO 3 2– : 10, 20 mmol/L) with petal-like structures (mesoporous), relatively high specific surface areas, i.e. 83.98 m 2 /g and 78.38 m 2 /g and high photocatalytic degradation, i.e. 72.79%, 67.78% (compared to nano-TiO 2 , AT 1 -10 and AT 1 -20), were obtained. Additionally, oxygen vacancy (OV) was generated on the surface of the recycled AT 2 -10 and AT 2 -20, which display strong photocatalytic performance for the degradation of MO greater than 65%, under ultraviolet (UV) irradiation and without any sacrificial reagents. This study proposes a new perspective on recycling coagulated flocs for practical application in wastewater treatment .
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