ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Dan-Ni Pei,Ai-Yong Zhang,Xiao-Qiang Pan,Yang Si,Han-Qing Yu
Noble metals, nanostructured carbon, and their hybrids are widely used for electrochemical detection of persistent organic pollutants. However, despite of the rapid detection process and high accuracy, these materials generally suffer from high costs, metallic impurity, heterogeneity, irreversible adsorption and poor sensitivity. Herein, the high-energy {001}-exposed TiO2 single crystals with specific inorganic-framework molecular recognition ability was prepared as the electrode material to detect bisphenol A (BPA), a typical and widely present organic pollutant in the environment. The oxidation peak current was linearly correlated to the BPA concentration from 10.0 nM to 20.0 μM (R2 = 0.9987), with a low detection limit of 3.0 nM (S/N = 3). Furthermore, it exhibited excellent discriminating ability, high anti-interference capacity, and good long-term stability. Its good performance for BPA detection in real environmental samples, including tap water, lake and river waters, domestic wastewater, and municipal sludge, was also demonstrated. This work extends the applications of TiO2 semiconductor and suggests that this material could be used as a highly active, stable, low-cost, and environmentally benign electrode material for electrochemical sensing.
✓ 已验证
DOI
高影响因子
Journal of Sustainable Metallurgy
·
2023
·Vol. 9
·期 3
·1303-1314
·
IF 2.4
Lv Ningning,Qiu Yuchao,Hu Yiming,Shi Hangkai,Shi Junjie,Ding Xiang,Li Haolun
It has been proved that Cr 2 O 3 is favorable to promote the crystallization of perovskite in the Selective Crystallization and Phase Separation (SCPS) process. However, the related thermodynamic data of equilibrium phase relations was quite limited. In the present work, the equilibrium phase relations of CaO-SiO 2 -TiO 2 system with the addition of 5 wt% Cr 2 O 3 were experimentally carried out using the high temperature equilibration-quenching technique followed by X-Ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy (SEM–EDS), as well as thermodynamic calculation. More attention has been focused on the influence of 5 wt% Cr 2 O 3 addition on the liquid-perovskite two-phase coexisting region. The results indicated that the crystallization of perovskite was promoted by Cr 2 O 3 addition by expanding the primary phase of perovskite toward higher SiO 2 areas. Meanwhile, distinct discrepancies were found when the present experimental results were compared with the data from the literature and the isotherms calculated by FactSage, indicating that the present results are not only meaningful for the improvement of the SCPS process, but also important for the optimization of titania related oxide thermodynamic database. Graphical Abstract
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 31
·17941-17949
·
IF 3.049
Xinxin Li,Hebang Shi,Bo Wang,Na Li,Liqiang Zhang,Pengpeng Lv
Surface coating of metal oxides is an effective approach for enhancing the capacity retention of a nickel-rich layered cathode. Current conventional coating techniques including wet chemistry methods and atomic layer deposition are restricted by the difficulty in perfectly balancing the coating quality and scale-up production. Herein, a highly efficient TiO2 coating route through fluidized bed chemical vapor deposition (FBCVD) was proposed to enable scalable and high yield synthesis of a TiO2 coated nickel-rich cathode. The technological parameters including coating time and TiCl4 supply rate were systematically studied, and thus a utility TiO2 deposition rate model was deduced, promoting the controllable TiO2 coating. The FBCVD TiO2 deposition mechanism was fundamentally analyzed based on the TiCl4 hydrolysis principle. The amorphous and uniform TiO2 coating layer is compactly attached on the particle surface, forming a classical core–shell structure. Electrochemical evaluations reveal that the TiO2 coating by FBCVD route indeed improves the capacity retention from 89.08% to 95.89% after 50 cycles.
✓ 已验证
DOI
高影响因子
Journal of Nanomaterials
·
2020
·
IF 1.98
Yan Zhang,Jiarong Li,Hongyuan Liu
The batch experiments of photocatalytic oxidation-reduction of bromate and ibuprofen (IBP) by graphene oxide (GO) and TiO2 heterostructure doped with F (FGT) particles were conducted. The performance and mechanism of synergistic removal of bromate and IBP by FGT were discussed. The results show that a demonstrable synergistic effect and excellent removal rate of bromate and IBP by FGT were exhibited. When pH is 5.2 and the dosage of FGT is 0.1 g/L, the reaction rate constants of bromate and IBP increased from 0.0584 min-1 and 0.4188 min-1 to 0.1353 min-1 and 0.4504 min-1, respectively, compared with the degradation of bromate or IBP alone. The reaction of photocatalytic synergistic degradation is appropriately fitted through Langmuir-Hinshelwood first-order kinetics. The mechanism of synergistic removal of bromate and IBP by FGT was discussed. And electrons (e-), hydroxyl radical (⋅OH), and superoxide radical (⋅O2-) are the main active species. The electrons play a main role in the bromate reduction, and bromine is the only reduction product, while the oxidation of IBP is the result of ⋅OH and ⋅O2-, and ⋅OH plays a key role. The recombination of electrons and holes is inhibited by simultaneous consumption of bromate and IBP, which makes full use of the redox properties of FGT and plays a synergistic role in the removal of pollutants. The results indicate that photocatalytic oxidation-reduction by FGT is a promising, efficient, and environmental-friendly method for synchronous removal of combined pollution in water.
✓ 已验证
DOI
高影响因子
Environmental Chemistry Letters
·
2022
·Vol. 20
·期 2
·999-1007
·
IF 13.615
Chu Mingna,Li Yang,Cui Kai,Jian Jiahuang,Lu Songtao,Gao Peng,Wu Xiaohong
Carbon dioxide (CO 2 ) emissions and rising fossil fuel consumption have already resulted in global warming and energy crisis. Therefore, conversion of CO 2 into fuels and chemicals is regarded as sustainable solution. Recent research has shown that applying an external electric or optical field promotes CO 2 polarization and, in turn, favors catalytic conversion into organic molecules. Here, a titanium dioxide (TiO 2 ) homojunction was formed on graphitic carbon nitride (g-C 3 N 4 ). Then, massive oxygen defective TiO 2 was obtained by dihydrogen reduction, resulting in a strong built-in electric field, of about 0.19 V, between perfect TiO 2 and defective TiO 2 . The catalyst was analyzed by Kelvin probe force microscopy, time-resolved photoluminescence, wavelength-dependent fluorescence and electron paramagnetic resonance. Results show that the catalyst promotes carbon dioxide polarization and separation of photogenerated charges. The catalyst increased carbon dioxide conversion into carbon monoxide (CO) about sevenfold compared to pristine g-C 3 N 4 , and about sixfold compared to the 20TiO 2 /g-C 3 N 4 precursor, under UV–visible light. This exceptional photocatalytic activity is explained by the formation of a built-in electric field by the defective TiO 2 .
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Hamidreza Abadikhah,Ehsan Naderi Kalali,Shabnam Behzadi,Sayed Ali Khan,Xin Xu,Marjan E. Shabestari,Simeon Agathopoulos
In this paper, graphene oxide based nanohybrids decorated with TiO 2 nanoparticles (TiO 2 @rGO) were synthesized and incorporated into the thin film nanocomposite (TFN) membrane for efficient organic solvent nanofiltration (OSN) with antifouling properties. In order to improve the compatibility of TiO 2 @rGO in the polyamide active layer, the nanohybrids were amino-functionalized before their incorporation in the interfacial polymerization process. TiO 2 @rGO incorporated TFN membranes showed intense permeability increment and antifouling characteristics in comparison with the controlled composite membrane and graphene oxide (GO) incorporated TFN membrane. The GO nanosheets structure favors solvent channeling and TiO 2 provides super hydrophilic characteristics, both resulted in a super permeable-hydrophilic OSN membrane with high structural stability and premium antifouling properties.
✓ 已验证
DOI
高影响因子
Journal of the American Chemical Society
·
2014
·
IF 11.444
Xibin Pang,Wei Chang,Chuncheng Chen,Hongwei Ji,Wanhong Ma,Jincai Zhao
The molecules O2 and H2O dominate the cleavage of aromatic sp2 C–C bonds, a crucial step in the degradation of aromatic pollutants in aqueous TiO2 photocatalysis, but their precise roles in this process have remained elusive. This can be attributed to the complex oxidative species involved and to a lack of available models for reactions with a high yield of direct products. Here, we used oxygen-18 isotope labeled O2 and H2O to observe the aromatic ring-opening reaction of the model compound 3,5-di-tert-butylcatechol (DTBC), which was mediated by TiO2 photocatalysis in an aqueous acetonitrile solution. By analyzing the primary intermediate products (∼75% yield), especially the seven-membered ring anhydrides that were formed, we obtained direct evidence for the oxygen atom of dioxygen insertion into a C–C bond of the aromatic ring. This indicates that molecular oxygen is the ultimate ring-opening agent in TiO2 photocatalysis and that it undergoes single O atom incorporation rather than the previously proposed molecular oxygen 1,2-addition processes. The ratio of intradiol to extradiol products depends on the particle size of TiO2 catalysts used, which suggests that the O2 activation is correlated with the available coordination sites on the TiO2 surface in the photocatalytic cleavage of the aromatic ring.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Qin Li,Yang Xia,Chao Yang,Kangle Lv,Ming Lei,Mei Li
Facing the requirement of modern industrial development, selective reduction of 4-nitroaniline (4-NA) into p-phenylenediamine (PPD) via a facile, economic and eco-friendly photocatalysis technique has attracted more and more attention in recent years. In this study, ZnIn 2 S 4 (ZIS) nanosheets grew in-situ on the surface of TiO 2 hollowspheres through a hydrothermal method and formed a direct Z-scheme heterojunction composite, which exhibited exceedingly better photocatalytic 4-NA reduction performance than bare ZIS and TiO 2 . Such enhancement was mainly attributed to the dissimilar dimensionalities, intimate contact, and matchable band edge positions between ZIS and TiO 2 semiconductors. Moreover, the substantial mechanism for the photocatalytic reaction in the ZIS/TiO 2 system was reasonably proposed. Inspired by recent applications of the Z-scheme heterostructured materials in solar energy conversion and artificial photosynthesis, this work would arouse an increasing interest in designing more Z-scheme photocatalyst systems with high efficiency and extensive applications.
✓ 已验证
DOI
高影响因子
VACUUM
·
2025
·
IF 3.9
Peng Zhang,Caijing Zhang,Fengjuan Miao,Bairui Tao
This study presents a nickel-foam supported TiO 2 /CuO/CuCo 2 O 4 composite electrode for dual-functional applications in non-enzymatic glucose sensing and supercapacitors. In glucose sensing performance tests, the TiO 2 /CuO/CuCo 2 O 4 electrode demonstrated a broad linear detection range (0.23–3.8 mM) and a high sensitivity of (715.2 ± 5) μA·mM −1 cm −2 , with a detection limit as low as 0.58 μM (signal-to-noise ratio, SNR = 3). Furthermore, the material exhibited outstanding performance in supercapacitor applications. Even at a high current density of 2 A g −1 , it maintained a specific capacity of up to (620 ± 15) C·g −1 , after 5000 cycles, the capacitance retention remained at (91.8 ± 0.3)%. The material's hierarchical porous structure and strong interfacial bonding contribute to its excellent performance, demonstrating great potential for multifunctional, high-efficiency energy storage and sensing materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Ye Wang,Yulong Ying,Lvlv Ji,Wei Li,Yuan Wei,Tao Wang,Sheng Wang
The concurrent generation of clean hydrogen fuel and value-added organic compounds through photocatalysis offers a promising pathway for solar-to-chemical conversion. Here, we present a ternary Au-mediated S-scheme heterostructure comprising hollow TiO 2 nanobowls (HTNB), vertically aligned ZnIn 2 S 4 (ZIS) nanosheets, and interfacially confined Au nanoparticles. The hollow TiO 2 scaffold, fabricated via a green and scalable electrospray method, shortens carrier diffusion paths, while the direct S-scheme junction preserves strong redox potentials. Embedded Au nanoparticles at the HTNB/ZIS interface act as directional electron mediators, enabling cascade charge transfer (TiO 2 → Au → ZIS) and suppressing recombination. The optimized HTNB/Au@ZIS achieves a remarkable H 2 evolution rate of 42.27 mmol g −1 h −1 with an apparent quantum efficiency of 59.5 % at 380 nm under simulated solar light, among the highest reported for TiO 2 /ZIS systems. In a sacrificial-free system, it simultaneously produces 4.48 mmol g −1 h −1 H 2 and 4.05 mmol g −1 h −1 N-benzylidenebenzylamine with > 99 % selectivity. Comprehensive spectroscopic, electrochemical, and EPR analyses confirm the Au-mediated S-scheme charge-transfer mechanism. This work demonstrates a generalizable interfacial-engineering strategy for coupling oxidative and reductive photocatalysis, advancing the design of efficient dual-functional photocatalysts for solar-to-chemical energy conversion.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Muhammad Shoaib,Shengyuan Xu,Haocheng Zhai,Qihui Sun,Shahab Ahmad,Maysam alsharawneh,Yifan Liu,Yang Guo,Xinyu Mu,Wei Tian,Xian Jian
An ideal and distinctive microwave-absorbing carbon-based material feature an eco-friendly, low-cost fabrication process combined with high loss efficiency and strong absorption potential. Here we design an innovative nanohybrids with carbon nano onion (CNO) from paraffin ultra-pure lamp oil by flame method awning unique structure to boost up the dielectric loss. And TiO 2 is introduced for efficient microwave absorption loss through an in-situ process using C 7 H 8 O and TiCl 4 , while SiO 2 plays a critical role in controlling the dielectric constant through the use of tetraethyl orthosilicate (TEOS). To boost up the nanohybrids effective loss mechanism the material is exposed to a carbon capsule (CC) utilizing acetylene (C 2 H 2 ) as a carbon source for 5 minutes under argon to prepare CNO/TiO 2 /SiO 2 /CC nanohybrids. The nearby dual-nanocarbon forms multi-level interfaces enhancing the multi-level rebound and microwave absorption of the microwave interfaces. The as-designed CNO/TiO 2 /SiO 2 /CC has effective minimum reflection loss (RL min ) value of -54.4 dB and the maximum effective absorption bandwidth (EAB max ) of 5.5 GHz at a thickness of 1.9 mm. It also has good thermal conductivity. Hence, this work confirms that high-performance nanohybrids derived from paraffin ultra-pure lamp oil are promising candidates, providing a novel approach for the design and development of carbon-based microwave absorbers.
✓ 已验证
产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·
IF 2.4
Chen Zhuo,Yu Binqi,Yao Tingfeng,Du Weitong,Ma Jianchao
The wettability and reaction behavior of mold flux with different basicity on TiN and TiO 2 substrates were investigated at up to 1400 °C by the sessile drop method, which can provide a theoretical basis for optimizing the composition of the mold flux for high Ti-bearing steel. As the basicity increased, the mold flux exhibited better wettability and a stronger interfacial reaction with TiN. Thus, it was easier to absorb the TiN inclusion in the order of CaO–SiO 2 -based flux (CS) > CaO–SiO 2 –Al 2 O 3 -based flux (CSA) > CaO–Al 2 O 3 -based flux (CA). Scanning electron microscopy coupled with energy-dispersive spectroscopy showed that the interfacial reaction was also related to basicity. There was a visible and regular interfacial reaction layer between TiN and CS and the CSA flux, which was produced by the redox reaction between the SiO 2 in the slag and the TiN substrate, whereas there was no interfacial reaction layer between TiN and the CA flux. As the basicity decreased, the mold flux exhibited better wettability and a stronger interfacial reaction with TiO 2 ; thus, it was easier to absorb the TiO 2 inclusion in the order of CA > CSA > CS. There was also a visible and regular interfacial reaction layer between TiN and the three fluxes, which was produced by the dissolution of TiO 2 and then reacted with CaO to generate CaTiO 3 .
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）