Desalination and Water Treatment
·
2024
·
IF 1
Fang Li,Feng Zhao,Manhong Huang,Chunyan Ma,Bo Yang,Qing Tian
Thin-film composite (TFC) membranes incorporating nanofillers of TiO 2 and graphene oxide (GO) in polyethersulfone (PES) substrates were fabricated for forward osmosis (FO) process in the present work. The modified PES substrates by phase inversion and FO membranes by interfacial polymerization were characterized by scanning electron microscopy, atomic force microscopy and contact angle. The synergistic effect of the nanofillers on the transport properties and antifouling performance of the TFC membranes with nanocomposite substrate (NS) was investigated by fouling test. The result showed that the substrates incorporating nanofillers exhibited improved hydrophilicity, greater porosity and higher water flux than the neat samples. Addition of the nanofillers in PES substrates remarkably improved the water permeance of TFC membranes with the drawback of the increase of reverse salt flux. Comparing to single filler, the combination of GO and TiO 2 as fillers in the substrate was proved to effectively enhance the antifouling ability of the TFC-NS membranes.
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DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2022
·
IF 0.836
Wenhua Wang,Chengcai Li,Wenyu He,Guojin Liu,Caihong Lei,Hailin Zhu,Yuan Yu
In this work, antibacterial and antifouling properties Polyvinylidene fluoride (PVDF) composite membranes were prepared via nonsolvent-induced phase separation of PVDF and Zn@TiO2 blending. The Zn@TiO2 nanoparticle was successfully prepared by the sol-gel method, and then Zn@TiO2 was used to modify the PVDF membrane to obtain higher water flux and antibacterial and antifouling properties. The PVDF composite membrane was systematically characterized through a series of analysis techniques, such as scanning electron microscopy (SEM) and X-ray diffraction (XRD). In addition, the water contact angle, pure water flux, tensile strength, porosity, antibacterial property and stain resistance of the membrane have been studied. Escherichia coli and Staphylococcus aureus were used to evaluate the antibacterial performance of the membrane, and the BSA was selected as a model organic pollutant to study the antifouling performance of the membrane. Results show that the PVDF composite membranes have excellent antibacterial properties (nearly 100%), high permeability (up to 433.69 L m−2 h−1) and mechanical strength (enhanced by 26.5%). It can be used for possible complex high-protein wastewater treatment without facing serious biological pollution problems, and has broad application prospects.
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高影响因子
Nanoscale
·
2015
·Vol. 7
·期 28
·12215-12224
·
IF 7.394
Yongquan Zhang,Qiang Fu,Qiaoling Xu,Xiao Yan,Rongyu Zhang,Zhendong Guo,Fei Du,Yingjin Wei,Dong Zhang,Gang Chen
N-doped TiO2-B nanowires are prepared by the solvothermal method using TiN nanoparticles as the starting material. X-ray photoelectron spectroscopy shows that the N dopants preferentially occupy the interstitial sites of TiO2-B up to a content of ∼0.55 at%. Above this critical value, the N dopants will substitute the oxygen atoms which improve the electronic conductivity of TiO2-B. The maximum proportion of substituted-N in the TiO2-B nanowires is ∼1.3 at%. Raman scattering shows that the substituted-N strengthens the Ti(1)–O1–Ti(2) and O1–Ti(1)–O3 bonds of TiO2-B. This improves the stability of the corresponding local structures, thus reducing the distortion of the Li+ diffusion channel along the b-axis of TiO2-B. As a result, the substituted-N has more of an impact on the electrochemical properties of TiO2-B than the interstitial-N does. The TiO2-B nanowires containing substituted-N dopants exhibit a remarkably enhanced electrochemical performance compared to pure TiO2-B. They show a discharge capacity of 153 mA h g−1 at the 20 C rate with a capacity retention of 76% after 1000 cycles. In addition, they can deliver a discharge capacity of 100 mA h g−1 at an ultra-high rate of 100 C, indicating their great potential in high power lithium ion batteries.
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高影响因子
ORGANIC ELECTRONICS
·
2018
·
IF 3.68
Xing Guo,Bingjuan Zhang,Zhenhua Lin,Jing Ma,Jie Su,Weidong Zhu,Chunfu Zhang,Jincheng Zhang,Jingjing Chang,Yue Hao
The performance of planar perovskite solar cells (PSCs) is very sensitive to the interfaces properties , especially the electron transport layer (ETL)/perovskite interface in the n-i-p structure, which could significantly influence the perovskite film morphology, crystallinity and the charge extraction and collection efficiency. Therefore, interface engineering is crucial for achieving high performance planar PSCs. Here, we reported a simple and effective interface engineering method which employed phenyl-C61-butyric acid methyl ester (PC 61 BM) thin film or fullerene (C 60 ) self-assembled monolayer (SAM) or their combination to modify the titanium dioxide (TiO 2 )/perovskite interface to obtain high performance PSCs. A comparative study between the effects of different fullerene derivative modifications was taken and indicated that adding proper C 60 -SAM into the PC 61 BM solution could improve the interface contact, increase the charge extraction and collection efficiency more obviously compared to the pristine PC 61 BM treatment. By combining the modified two-step spin coating method, the best performance device based on C 60 -SAM modified TiO 2 achieved a power conversion efficiency (PCE) of 17.8%, much higher than the control device without the interface treatment (12.9%) and also higher than the PC 61 BM modified device (16.1%) based on MA 1-y FA y PbI 3-x Cl x perovskite. As a consequence, such interface engineering via C 60 -SAM or PC 61 BM + C 60 -SAM combination modification is a promising method for achieving highly efficient PSCs.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2017
·
IF 4.217
Shu-ming Liu,Rui-tang Guo,Shu-xian Wang,Wei-guo Pan,Peng Sun,Ming-yuan Li,Shuai-wei Liu
Ca salts in fly ash have a deactivation effect on SCR catalyst. In this study, the deactivation mechanism of Ca on Ce/TiO 2 catalyst was investigated in term of the in situ DRIFT study. The experimental results indicate that the poisoning effect increases with reaction temperature. From the results of in situ DRIFT study, it may be concluded that the NH 3 -SCR reaction over Ce/TiO 2 catalyst takes place though two pathways: the L -H mechanisms (<200 °C) and the E-R mechanism (>200 °C). For Ce/TiO 2 -Ca, the NH 3 -SCR reaction over it is mainly controlled by L -H mechanism. The deactivation of Ce/TiO 2 -Ca lies in the following two aspects: (1) the inhibited NH 3 adsorption and NO oxidation (<200 °C); (2) the greatly suppressed NH 3 adsorption and activation (>200 °C).
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高影响因子
ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Yamei Li,Shidong Ji,Yanfeng Gao,Hongjie Luo,Ping Jin
Vanadium dioxide (VO2) is a key material for thermochromic smart windows that can respond to environmental temperature and modulate near-infrared irradiation by changing from a transparent state at low temperature to a more reflective state at high temperature, while maintaining visible transmittance. Here, we demonstrate for the first time that the Mott phase transition characteristics in VO2 nanoparticles can be remarkably modified by misfit strains occurring at the epitaxial interface between VO2 and the anatase TiO2 of VO2/TiO2 core–shell particles. The heteroepitaxial growth of the as-synthesized particles followed an unprecedented orientation relationship, and an epitaxial growth mechanism is proposed to explain this behavior. A relatively small theoretical coherent misfit (3–11%) and a moderate heating rate (20 °C·min–1) in the preparation of the core–shell structure were critically important from the thermodynamic and kinetic perspectives, respectively. The misfit-induced interfacial strain along the uniaxial cR axis increased the transition temperatures, especially on the cooling portion of the heating–cooling cycle, leading to a notably reduced transition hysteresis loop width (from 23.5 to 12.0 °C). Moreover, the optical band gap was also engineered by the interfacial effect. Such a reduced hysteresis showed a benefit for enhancing a rapid response for energy saving thermochromic smart windows.
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DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Pai Peng,Jie Ren,Shuxiang Wang,Jing Huang,Li Zou,Pingping Yang,Xiangui Pang,Ming Zhang,Youyi Su,Wanqi Luo,Wenyan Tao,Jiale Xie
The severe photocorrosion of cadmium sulfide (CdS) restricts its practical application for solar hydrogen production. Although remarkable progress has been achieved with an overlayer strategy for isolating the CdS surface, the lifetime of CdS-based photoanodes is still far from the actual requirements. Herein, a hybrid overlayer of defective Ni-MOF and NiO nanoparticles has been developed through the chemical bath deposition method with postannealing. This hybrid overlayer of Ni-MOF-d is coated on the surface of the TiO2/CdS type-II heterojunction. The composite photoanode exhibits a photocurrent density of 4.41 mA cm–2 at 1.23 VRHE, which is 3.47- and 1.32-fold that of CdS and TiO2/CdS, respectively. The Ni-MOF-d overlayer gives rise to a negative shift of the onset potential by 59.51 mV. After a long-term stability test of 11 h, a photocurrent retention of 70% is observed, which is among the most robust CdS-based photoanodes. The kinetics studies reveal that the performance improvements can be attributed to the multiple functions of the Ni-MOF-d hybrid overlayer, including isolating the CdS surface from the electrolyte, cocatalyzing the electrode oxidation processes, passivating the surface defect states of CdS, and facilitating the charge injection from the photoanode to the electrolyte.
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高影响因子
Catalysts
·
2026
·Vol. 16
·期 10
·916
·
IF 4.5
Shuwei Wang,Jinhua Liu,Weijie Liu,Yiting Jia,Ning Liu,Yifan Ren,Yanni Zhang,Jingjing Zhang,Peng Zhao,Peng Sun
Photocatalytic coatings that can be immobilized on outdoor surfaces provide a promising route for distributed and passive purification of atmospheric pollutants. The practical application requires not only visible-light photocatalytic activity but also stable dispersion, facile coating and favorable interfacial properties. In this work, N-doped TiO2(N-TiO2) sols with different nominal doping contents were prepared through hydrothermal treatment of peroxotitanic acid precursors containing different amounts of urea at 130 °C for 4 h. All samples exhibited anatase phase, while the shifts in XRD and Raman peaks indicated nitrogen-doping-induced lattice distortion. The sols exhibited monomodal particle size distributions with average hydrodynamic diameters in the range of 20.13 nm to 27.07 nm, and the high absolute zeta potentials (>30 mV) demonstrated good dispersion stability. The XPS results confirmed that nitrogen atoms were introduced at interstitial sites with Ti-O-N bonds and increased the relative proportion of surface hydroxyl oxygen from 13.9% to 34.2%. Nitrogen doping improved the visible-light absorption by decreasing the bandgap from 3.06 eV to 2.81 eV and reduced the water contact angle of the sol-derived films from 24.0° to as low as 8.6°. Among all samples, 1.0N-TiO2exhibited the highest NO removal efficiency of 72.5% under visible-light irradiation and retained good stability over five photocatalytic cycles. These results demonstrate that moderate nitrogen doping can simultaneously regulate the colloidal, optical and interfacial properties of TiO2sols, making them promising coating materials for functionalization of building envelopes or other outdoor surfaces for air purification.
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高影响因子
CHEMICAL ENGINEERING COMMUNICATIONS
·
2025
·
IF 2
Fan Pan,Lijiang Tian,Fulong Chen,Jie Zhang
The photocatalytic efficiency of titanium dioxide(TiO2) is easy to restrict by rapid recombination of carriers, narrow spectrum response range, and low specific surface area. Constructing heterojunctions has been widely acknowledged as a viable strategy to enhance the photocatalytic performance of TiO2. Here, TiO2@MIL-101(Cr) heterojunction was synthesized via the in-situ method and applied to adsorbing and photocatalytic degrading of gaseous benzene. The findings demonstrate 40TM exhibited the best adsorption(1157.03 μgC6H6/(g·h)) and photocatalytic(817.80 μgC6H6/(g·h)) performance, which were 2.05 and 5.21 times of TiO2, respectively. The enhancement of adsorption performance probably resulted from the higher specific surface area(637.33 m2/g) and the micro-mesoporous structure. The excellent photocatalytic performance might stem from the extended wavelength response range(400–700 nm) and the Z-scheme heterojunction formation. The possible mechanism is that electrons in MIL-101(Cr) and holes in TiO2 could participate in redox reactions to generate radicals, with superoxide radicals(∙O2−) and hydroxyl radicals(∙OH) being identified as the primary active species for benzene degradation. Overall, this investigation offers a valuable reference for the application of heterojunction catalysts in the field of adsorption-photocatalytic degradation of volatile organic compounds (VOCs).
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Jianfeng Hu,Huiya Cheng
A challenge in metal protection is developing anti-corrosion materials that possess both high adsorption capacity and intelligent responsiveness. To overcome the limitations of traditional corrosion inhibitors, a novel pH-responsive corrosion inhibitor (PDT@ZIF-90) was developed through a multi-step strategy. Specifically, the catechol-modified polymer–TiO2 hybrid (PDT) was synthesized through Schiff base reactions, which demonstrated dense adsorption on Q235 carbon steel through Fe–N/O coordination. Subsequent ZIF-90-mediated in situ encapsulation enabled precise payload integration of the PDT corrosion inhibitor. UV-vis characterization confirmed that the PDT@ZIF-90 composite system enables pH-triggered intelligent release of the active corrosion inhibitor component under acidic conditions (pH < 6). Electrochemical tests revealed a 95.2% inhibition efficiency for 200 ppm PDT@ZIF-90 in 3.5 wt% NaCl. This dual-functional strategy offers a scalable paradigm for self-adaptive anticorrosion materials suitable for Q235 carbon steel in marine and energy infrastructure applications.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Xiaolong Tan,Xiangguo Zhang,Yushi He,Zeyi Jiang,Cheng Bao,Nien-Chu Lai
Carbon monoxide selective methanation (CO-SMET) holds promise for removing low-concentration CO in the hydrocarbon reforming for hydrogen (H 2 ) production process and is a deep CO removal technology suitable for low-temperature fuel cells. However, developing highly efficient CO-SMET catalysts remains a significant challenge. Herein, we report a supported catalyst (Ru 1.0 (Cl)/TiO 2 ) with highly dispersed ruthenium (Ru) metal on a high-specific-surface-area mesoporous titanium dioxide (TiO 2 ) catalyst. This catalyst exhibits excellent performance in CO-SMET. It can reduce the CO concentration to below 10 ppm in a wide temperature range of 190–300 °C, and the outlet CO concentration can reach an ultra-low level of 0.2 ppm in the optimal temperature zone (210–220 °C). Through XPS and in situ DRIFTS characterizations, the crucial role of Ru–Cl species at the metal-support interface is revealed. The presence of chlorine atoms leads to electron enrichment in the Ru metal, enhancing its adsorption and activation of CO.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Nguyen Thi Ngoc Yen,Vuong Thanh Tuyen,Cao Thi My Dung,Le Thuy Thanh Giang,Tran T.T. Van
The degradation of persistent organic dyes, such as methylene blue (MB), is crucial for protecting aquatic environments, as these compounds are chemically stable and resistant to conventional treatment methods. The TiO 2 -based photocatalysts have been widely explored for pollutant degradation owing to their chemical robustness, eco-friendliness, and strong oxidative capability under light irradiation. However, its wide bandgap (∼3.0–3.2 eV) restricts optical absorption to the ultraviolet region, which comprises only a small portion, less than 5 % of solar energy. In this work, a UCNRs@TiO 2 core–shell nanostructured photocatalyst composed of NaYF 4 :30 Yb 3+ ,0.5 Tm 3+ upconversion nanorods (UCNRs) and TiO 2 nanoparticles was successfully fabricated to enhance both ultraviolet (UV) and near infrared (NIR)-responsive photocatalytic activity. The UCNRs serve as efficient optical converters, absorbing near-infrared light at 980 nm and emitting UV photons to activate TiO 2 , thereby extending its operational spectral range. Photocatalytic activity was evaluated under solar simulated irradiation by monitoring the degradation of MB at a concentration of 15 mg/L. The UCNRs@TiO 2 photocatalyst achieved a remarkable degradation efficiency of 100 % MB within 90 min with an apparent rate constant of 0.063 min −1 , in contrast to 195 min required by bare TiO 2 . In addition, the photocatalytic enhancement mechanism of UCNRs@TiO 2 materials was also proposed based on the results of Photoluminescence, UV–Vis spectra and LC-MS. The excellent stability of the composites after three cycles of reuse demonstrates their promise for the rational design of NIR-driven photocatalysts for sustainable wastewater treatment.
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高影响因子
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