SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Qiao Zhang,Chunxi Hai,Yanxia Sun,Yunyun Gao,Shengde Dong,Luxiang Ma,Xin He,Qi Xu,Yuan Zhou
How to effectively recover Li + from liquid mineral brines with high Mg 2+ /Li + ratio and low Li + concentration is very significant and important for promoting the carbon peak and carbon neutrality plan valid. Therefore, taking the application merits and formation scheme into consideration, well-crystallized β-Li 2 TiO 3 precursors for obtaining TiO 2 ⋅H 2 O adsorbents were prepared through a classical solid-phase method under the optimized conditions. Interestingly, both Li + desorption and titanium dissolution loss ratio of TiO 2 ⋅H 2 O adsorbents depend on the HCl concentration and delithiation temperature. The Li + escaping routes from LTO precursors to TiO 2 ⋅H 2 O adsorbents is dramatically distinctive with that in the next adsorption/desorption cycles. Accordingly, as-prepared TiO 2 ⋅H 2 O adsorbents owns the high adsorption capacity up to 51.25 mg/g at 60 °C and low Ti-dissolution loss ratio around 1.08 %. The initial adsorption capacity of TiO 2 ⋅H 2 O adsorbents in real original oil–gas field brines containing 100 ppm Li + is 20.14 mg/g. According to the structure–property relationship, formation and working mechanisms of TiO 2 ⋅H 2 O adsorbents was proposed.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2024
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IF 5.8
Lang Xiao,Weiping Gong,Zhao-hui Long,Jiahui Zhao,Duoduo Zhang,Ting Wang,Kai Li,Alexandra Navrotsky
Formation kinetics and equilibrium thermodynamics are fundamental knowledge for predicting microstructure and properties during materials processing and utilization. This work prepared high purity Bi 12 TiO 20 , Bi 4 Ti 3 O 12 and Bi 2 Ti 4 O 11 compounds and characterized these compounds by in-suit X-ray diffraction, scanning electron microscope, energy dispersive spectrometer as well as calorimetry. Based on the experimental data obtained in this work and the literature, a thermodynamic description of the Bi 2 O 3 –TiO 2 system was carried out, a thermodynamic database as well as the calculated phase diagram of the system was provided. The discrepancy between the present calculation with the experimental data were discussed, the formation kinetics of the compounds was explained and the bismuth titanate ceramics with tailored structure and specific physical properties were sintered.
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Journal of Materials Chemistry A
·
2024
·
IF 10.7
Wei Guo,Zheng Zhang,Nian Li,Min Xi,Cui Liu,Shudong Zhang,Zhenyang Wang
Transparent materials accompanying ultraviolet and near-infrared (UV/NIR) shielding play a crucial role in sunlight management and are desirable for reducing energy consumption in buildings. Herein, a hollow flower-like core–shell hybrid, in which hollow TiO2 spherical cores are bonded with a CsxWO3 hierarchical nanosheet shell (h-TiO2@CsxWO3 hybrid), is prepared for high-efficiency absorption of UV/NIR light and corresponding transparent membrane-based UV/NIR light shielding for thermal management. Impressively, while maintaining high visible light transmission, the h-TiO2@CsxWO3 flower-like hybrids display the almost complete absorption of UV and NIR light caused by the multilevel synergistic scattering and absorption of incident light between the components. Next, to expand the application of building energy conservation engineering, the h-TiO2@CsxWO3 flower-like hybrids are spray-coated onto the surface of a PET film to serve as the membrane material, showing nearly 80% visible light transmission and complete shielding from UV and NIR light. As a proof of concept, based on the UV/NIR light absorbing shield strategy for thermal management, by transferring the as-prepared h-TiO2@CsxWO3/PET functional membrane as “window glass” on a home-made house model, a temperature reduction of ∼16.4 °C could be achieved relative to a blank house under 1 sun irradiation. Further, outdoor testing (Hefei, China) with simulated room temperatures below ∼25 °C throughout a full day's test cycle achieved a sub-ambient cooling temperature of ∼11.5 °C. Thus, both the solar radiation shielding capability and the combined outdoor service performance significantly advance the UV/NIR shielding strategy for real-world solar/thermal-management applications.
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JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Ping Cheng,Botao Wang,Qianyu Ji,Pingping Yuan,Shixin Gui,Shuying Liang,Lin Li,Hongwei Xu,Shaoqi Qu
The widespread dissemination of antibiotic resistance genes (ARGs) via plasmid-mediated conjugation poses a serious threat to public health. Conjugation can be accelerated by selective pressures caused by antibiotics and other environmental pollutants. Fe-doped TiO 2 nanosheets (FTNs) are widely used for the photocatalytic treatment of wastewater, raising concerns about their potential presence in the environment and their role in exerting selective pressure on conjugation. In this study, FTNs at subinhibitory concentrations (25, 50, and 100 mg/L) were applied in an in vitro conjugation model to investigate their impact on ARG conjugation. The results showed that FTN exposure increased conjugative transfer frequency by more than 2.5-fold. Molecular mechanism analysis revealed that FTNs increased membrane permeability by causing physical damage and inducing oxidative stress, promoted energy supply by modulating the proton motive force (PMF) and enhancing the tricarboxylic acid (TCA) cycle, and improved intercellular contact by enhancing cell adhesion. Additionally, transcriptomic analysis indicated that FTNs upregulated the expression of genes related to energy supply, cell adhesion, cell transport and oxidative stress. Overall, the findings of this study reveal the potential risk of nanosheets accelerating the spread of ARGs via plasmid-mediated conjugation, highlighting the necessity of establishing guidelines for their appropriate use and discharge.
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PubMed
高影响因子
Materials Today Chemistry
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2025
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IF 6.7
Kai Zhang,Wenying Zhou,Na Lin,Chenyu Li,Jinming Fan,Jiahuan Zhao,Yuan Jia,Mengxue Yuan
With the wide applications of polymer dielectrics in electronic devices and power supply systems, it is of great importance to explore polymeric composites with simultaneously high dielectric permittivity ( ε ) along with low loss ( tan δ ), and large breakdown strength ( E b ). To concurrently achieve these superior qualities in silicon (Si)/poly(vinylidene fluoride) (PVDF), in this study, a sol-gel method was used to decorate raw Si with a layer of titanium oxide (TiO 2 ), which was then incorporated into PVDF to produce a series of Si@TiO 2 /PVDF composites with diverse TiO 2 shell thicknesses. The findings demonstrate that compared with pristine Si/PVDF both loss and leakage conductivity of Si@TiO 2 /PVDF are markedly decreased by the TiO 2 shell, which enhances the interfacial compatibility between Si and PVDF, and blocks the creation of conductive network from virgin Si particles, inhibiting the long-range migration of carriers. Furthermore, the TiO 2 interlayer not only induces traps and increases the energy barrier height for trapped charges to de-trap, but also mitigates the intense interfacial dielectric mismatch subsequently lifting the E b . The theoretic fitting results via Havriliak-Negami equation demonstrate the TiO 2 shell’ suppression on charge migration and reveal the underlying polarization mechanism. Fine assembly of TiO 2 with desirable thickness onto Si realizes effective regulation of over dielectric parameters of the composites. The developed Si@TiO 2 /PVDF present concurrently high ε , E b but low loss characteristics, indicating promising potential applications in advanced electronic devices and power systems.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2025
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IF 6
Yijie Jin,Shengpeng Zhan,Ao Chen,Hualong Yu,Dan Jia,Haitao Duan
Based on the in-situ host–guest nanofusion strategy, smart nanocontainers of titanium dioxide nanoflowers (TDN) hosts loaded with benzotriazole (BTA) guests were synthesized by a simple one-step hydrothermal method. They were also successfully introduced into epoxy matrix to develop anti-corrosion coatings with long-lasting inhibition and passivation. Result of the electrochemical impedance spectra (EIS) designed TDN-BTA epoxy coatings displayed higher charge transfer resistance (1.22 × 1010 O cm 2 ) after immersion for 30 days. Meanwhile, the coating was intact and rust-free after 55 days of immersion in a neutral salt spray environment, attributed to the host–guest synergistic nanocontainers, which is attributed to the synergistic host–guest nanocontainer high loading of corrosion inhibitors and its excellent long-term responsiveness to pH changes.
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COMPOSITES COMMUNICATIONS
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2024
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IF 6.5
Arif Hussain,Liu Jie,Can Zhao,Junyi Yu,Asad Muhammad Khan,Suibin Luo,Shuhui Yu
Polymer-based flexible materials can be slated as successors of conventional inorganic ferroelectrics to induce tunable dielectric properties in microwave devices because of their advantageous characteristics, such as lightweight, flexibility, easy processibility, and eco-friendliness. Ferroelectric polymers require a high external field to induce dielectric tunability, which can be a problem. Another problem is the dielectric mismatch and incompatibility between ceramic and polymer, which hinders the ceramic-polymer composites to induce tunable dielectric properties. Herin, titanium oxide-barium strontium titanate (TO@BST) core-shell nanoparticle are reinforced into the poly (vinylidene fluoride) (PVDF) matrix to fabricate flexible nanocomposite with tunable dielectric properties. The core-shell nanoparticle-based nanocomposite produced low voltage dielectric tunability (12.03 % at 33 kV/mm) and excellent tunable dielectric efficiency ( T uE , 0.8 %) while maintaining low dielectric loss (tanδ, 0.024). Moreover, TO@BST-based nanocomposite exhibited a remarkable 91 % improvement in dielectric constant compared to pure PVDF and a 25.7 % improvement compared to BST-based nanocomposite. The dielectric breakdown strength ( E b ) of the nanocomposite filled with 40 wt% TO@BST nanoparticle improved by 45 % (114.36 kV/mm) compared to pure BST-based nanocomposite (78.68 kV/mm). This work provides valuable insights into designing novel flexible nanocomposites with low voltage tunability and high breakdown strength at high filler loading.
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Nanomaterials
·
2025
·Vol. 15
·期 5
·365
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IF 4.3
Yijie Shen,Zhe Liu,Renke Bi,Bianbian Zhou,Yan Wang,Jialong Liu,Zhiyu Wang,Bing Han
Photodegradation of antibiotics based on photocatalytic semiconductors is a promising option to alleviate water pollution. Despite its limitations, TiO2-based photocatalysts are still the most widely studied materials for pollutant degradation. In this work, a pomegranate-like g-C3N4/C/TiO2nano-heterojunction was constructed using the hydrothermal–calcination method, consisting of interconnected small crystals with a dense structure and closely contacted interface. Low-crystallized carbon filled the gap between TiO2and g-C3N4, forming a large interface. The local in-plane heterostructures generated by C/g-C3N4are further improved for carrier transport. As expected, the optimal sample calcined at 300 °C (GTC-300) efficiently eliminated tetracycline hydrochloride (TC-HCl, 20 mg L−1), achieving a removal rate of up to 92.9% within 40 min under full-spectrum irradiation and 87.8% within 60 min under the visible spectrum (λ > 400 nm). The electron mediator, low-crystallized carbon, successfully promoted the formation of new internal electric fields via the widespread heterojunction interface, which accelerated the separation and migration of photogenerated carriers between g-C3N4and TiO2. These results confirm that the g-C3N4/C/TiO2nano-heterojunction exhibited outstanding photodegradation performance of TC-HCl. The electron mediator shows great potential in promoting carrier transfer and enhancing photocatalytic performance of heterogeneous photocatalysts in water treatment.
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OPTICAL MATERIALS
·
2024
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IF 3.8
Ni Wang,Linye Zhang,Guangxiang Duan,Wen Wang,Yanling Zhou,Guangtao Wei,Deyuan Xiong,Huanrong Wang,Xinlan Huang
An efficient TiO 2 /ARM (2:1) catalyst was prepared by sol-gel method, in which the ratio of TiO 2 to ARM was 2:1, and the prepared TiO 2 /ARM (2:1) catalyst was utilized to activate peroxymonosulfate (PMS) for the degradation of metronidazole (MET). X-ray diffractometry (XRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) analyses showed that the pore volume, pore diameter, and specific surface area of RM were significantly increased by acidification. Acidified RM provided more loading space for TiO 2 , allowing more TiO 2 to be dispersed on the RM surface and in the pore interstitials. The TiO 2 /ARM (2:1) composite could expose more highly reactive components, thereby increasing the catalytic activity of the catalyst. X-ray photoelectron spectroscopy (XPS) and electrochemical analyses demonstrated the excellent activity of TiO 2 /ARM (2:1) composite in separating and transferring photoinduced electrons and holes. Approximately, 91.0 % of MET (10 mg/L) was decomposed at 60 min under the optimal reaction conditions of the TiO 2 /ARM (2:1) catalyst [TiO 2 /ARM (2:1) ] = 0.05 g/L, [PMS] = 3 mM, and the pH of 5.9. The results of the quenching experiments indicated that the •O 2 − , 1 O 2 and h + were the main reactive species responsible for the degradation of MET in the TiO 2 /ARM (2:1) /PMS/vis system. The possible degradation pathways of MET were proposed through Density-Functional Theory (DFT) calculations and liquid chromatography-mass spectrometry (LC-MS). Results. The prediction results of the Toxicity Evaluation Software Tool (T.E.S.T) suggested that the toxicity of MET was effectively reduced after treatment in the TiO 2 /ARM (2:1) /PMS/vis system. After five cycling experiments, TiO 2 /ARM (2:1) showed excellent stability. This work provided a new perspective on the modification of industrial waste RM applied in the direction of catalysis.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Jinzhao Liu,Xinyu Chen,Hu Wang,Yun Chen,Liuliu Zhong,Chundong Zhang,Lei Wang,Hui Wan,Guofeng Guan
ZIF-67 derived cobalt-based catalysts have potential for Fischer–Tropsch synthesis (FTS). In this work, core–shell structured Co-Z@TiO2 catalysts with different graphitization degrees and carbon contents were handily prepared by adjusting the calcination process, using the ZIF-67 encapsulated by amorphous TiO2 as the precursor. By the protection effect of the residual carbon, the aggregation of cobalt species was suppressed. The dispersion and reducibility of the catalyst can be regulated by manipulating the type and amount of residual carbon. The Co-Z@TiO2 catalyst with proper carbon content exhibited high CO conversion (36.9%), C5+ selectivity (80.4%), and especially gasoline range hydrocarbons (49.3%). The catalyst also showed good stability during a 110 h reaction.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Xiaoyun Qiao,Tingsong Zhang,Huibin Zhang,Zeshan Xiong,Runwei Wang,Zongtao Zhang,Shilun Qiu
In this paper, a novel host–guest assembly strategy is developed to incorporate TiO 2 nanoparticles and CdS quantum dots (CdS QDs) into the photoactive dendritic porphyrins mesoporous silica nanospheres (DPMSN) channels for establishing heterojunctions nanoreactors (designated as DPMSTNC). The well-defined dendritic architecture facilitates the high dispersion of TiO 2 /CdS heterojunctions within the DPMSN matrix, effectively maximizing the interfacial contact area between the heterojunction components and the cobalt porphyrin framework. Crucially, the synergistic interplay of cobalt porphyrins incorporated in the silica framework and the ultra-small TiO 2 /CdS heterojunction in the dendritic channels promotes efficient charge transfer and separation in the nanoreactor. The optimized DPMSTNC nanoreactor exhibits excellent catalytic performance with a conversion of 96.0 % and a selectivity of 92.0 % in styrene oxidation, which significantly surpasses that of single-component catalysts and simple composite heterostructure catalysts. This nanoreactor design strategy, which combines spatially confined heterojunctions with photoactive porous frameworks, provides a novel and versatile platform for developing high-efficiency photocatalytic systems through precise nanoarchitectural control.
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FUEL
·
2025
·
IF 7.5
Baofang Zhang,Ziyu Zengcai,Wenting Lin,Wenjie Gu,Dizhou Lou,Ruixi Luo,Qingwei Meng,Yunhong Pi,Tiejun Wang
Herein, Cu 2 O/Ti 3 C 2 T x @TiO 2 is designed by facile one-step strategy of glucose oxidation–reduction reaction for efficient H 2 production from the photothermal-driven reforming of methanol solution (PTRM). At 210 °C, the high H 2 production rate of 87404.0 μmol g cat −1 h −1 (apparent quantum efficiency of 20.6 % at 550 nm) over Cu 2 O/Ti 3 C 2 T x @TiO 2 under photothermal-driven condition is roughly 4 times that of the single thermal condition. The excellent photothermal H 2 yield activity over Cu 2 O/Ti 3 C 2 T x @TiO 2 is attributed to effectively separate carriers and reduced activation energy due to the synergistic effect of light and heat (55.05 kJ·mol −1 ) comparing to pure thermal condition (88.29 kJ·mol −1 ), which led to achieve low-temperature H 2 evolution at 95 °C. Additionally, this work demonstrates the excellent photothermal stability of Cu 2 O/Ti 3 C 2 T x @TiO 2 under without KOH condition (average rate 2383.2 μmol g cat −1 h −1 in 72 h), and a total turnover number (TON) up to 1373.
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危险品化学品经营许可证（带存储）