Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Kaibo Wang,Jin Wang,Mengmeng Dou,Chao Han,Wubin Wang,Xinyu Li,Yadong Hu,Guangxu Zhang
How to prepare polyvinylidene fluoride (PVDF) membranes with high flux, high rejection rate, strong anti-fouling ability and excellent durability is a crucial issue in the current production and application industries of PVDF membranes. In this work, an environmentally friendly mechanical grinding method was employed to composite β-cyclodextrin (CD) with titanium dioxide (TiO 2 ) nanoparticles, resulting in the preparation of CD@Ti composite nanomaterials. These were then incorporated into PVDF membranes to fabricate a series of nanocomposite membranes (NCM). Compared with the pristine PVDF membrane, the PVDF/CD@Ti 1.5 membrane exhibited a 1.67-fold increase in water flux, and its rejection rate for bovine serum albumin (BSA) improved from 86.6 % to 97.1 %. Compared to modification using TiO 2 alone, the CD@Ti composite modification effectively suppressed particle agglomeration within the membrane. The PVDF/CD@Ti 1.5 membrane demonstrated enhanced hydrophilicity, increased surface negative charge, and reduced surface roughness compared to the initial PVDF membrane, all of which contributed to improved antifouling performance. Specifically, after filtering BSA, humic acid (HA), and sodium alginate (SA), and subsequently rinsing with pure water, the flux recovery ratio (FRR) of the pristine PVDF membrane were 73.6 %, 64.8 %, and 53.5 %, respectively, whereas those of the modified PVDF/CD@Ti 1.5 membrane increased to 89.3 %, 83.5 %, and 78.4 %, respectively. Analysis based on the Extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory indicated that the incorporation of CD@Ti effectively reduced the attractive interaction energy between the PVDF/CD@Ti membrane and foulants. Furthermore, the PVDF/CD@Ti 1.5 membrane demonstrated excellent stability in multiple filtration cycles, real lake water filtration tests, and acid–base immersion experiments, confirming its potential for practical applications.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Tianying Peng,Wenyong Mei,Jin Zhang,Saiwen Liu
4-Aminophenol (4-AP), a crucial organic intermediate in the synthesis of acetaminophen, poses significant toxicity and potential environmental and health risks. Titanium dioxide@ titanium-based metal–organic frameworks (TiO2@Ti-MOFs) form a three-dimensional heterogeneous composite structure by covalently binding to the surface of 2D transition metal carbides and nitrides (MXenes). The synergistic effect between the porosity of titanium-based metal–organic frameworks (Ti-MOFs) and the layered structure of MXenes provides abundant adsorption sites, effectively enriching the target molecule 4-AP and enhancing the sensor's selectivity. The high conductivity of MXenes, combined with the semiconductor properties of TiO2@Ti-MOFs, accelerates electron transfer on the electrode surface, resulting in an increased response current and improved sensitivity and detection range. The detection range of the TiO2@Ti-MOF/MXene electrochemical sensor spans from 0.5 to 50 μM, with a detection limit of 0.16 μM. This sensor is effectively applicable for detecting 4-AP in real water samples, such as tap water and Qingshan Lake water, demonstrating satisfactory recovery.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2012
·
IF 4.173
Zhujian Huang,Pingxiao Wu,Yonghong Lu,Xiaorong Wang,Nengwu Zhu,Zhi Dang
The organic layered double hydroxides (LHDs)/TiO 2 composites with various mass ratios were prepared by the reconstruction of mixed metal oxides to photodegrade dimethyl phthalate (DMP). The physicochemical properties of the obtained products were analyzed by X-ray diffraction (XRD) spectra, X-ray photoelectron spectra (XPS), UV–vis diffuse reflectance spectroscope and scanning electron microscope (SEM). The results showed that the TiO 2 particles and the organic LDHs were combined together through chemical bonds, and TiO 2 particles were well distributed on the surface of the interconnecting organic LDHs nano-flakes. According to the experimental results of adsorptive and photodegradation of DMP, the organic LDHs with flaky structure could effectively adsorb the DMP molecules and the adsorption isotherm by the composites modeled well with the Langmuir equation. The enrichment of DMP onto the composites and the external hydroxyl groups of the composites produce a synergistic effect leading to greatly enhance the rate of DMP photocatalytic degradation by the obtained composites.
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高影响因子
Frontiers of Materials Science
·
2025
·Vol. 19
·期 4
·250743
·
IF 2.3
Zhang Hang,Liu Shuhui,Zhang Xingxiang,Li Wei
A new method of incorporating nano-sized titanium dioxide (nano-TiO 2 ) particles onto the shell of photochromic microencapsulated phase change materials was introduced, in order to address issues of easy degradation of photochromic dyes’ core components caused by ultraviolet (UV) irradiation and residual organic emulsifiers. Using nano-TiO 2 as the Pickering emulsion stabilizer and cross-linked polyurethane as the shell material, a composite protective structure was constructed to encapsulate core materials with phase-change and photochromic properties, thereby forming photochromic phase change microcapsules (TPT-MPCMs) with UV protection and thermal insulation. Characterization results show that the core–shell structured TPT-MPCMs possessed high light transmittance, with a particle size of 5–15 µm and a latent heat of 116.2 J·g −1 . The highly cross-linked shell formed by xylitol and isophorone diisocyanate effectively protected the core from thermal degradation up to 180 °C, while the nano-TiO 2 shell surface allowed maintaining the UV responsiveness of microcapsules after exposure to intense UV irradiation for 5 h. This strategy significantly improves the long-term stability and service life of photochromic microcapsules under harsh environments, opening up broad prospects for their applications in fields such as outdoor anti-counterfeiting labels, intelligent temperature-controlled coatings, and multifunctional smart textiles.
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DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 18
·184001
·
IF 3.399
Qihua Jing,Hao Zhang,Hao Huang,Xingce Fan,Yumeng Zhang,Xiangyu Hou,Qingyu Xu,Zhenhua Ni,Teng Qiu
Rhenium disulfide (ReS2) is an interesting kind of transition metal dichalcogenide (TMD) because of its thickness-independent and suitable direct-bandgap structure, which could enable highly efficient solar-energy conversion efficiency. Here, we demonstrate an ultrasonic liquid exfoliation technique in combination with grinding to produce high quality ReS2 nanosheets (NSs) on a large scale. After combination with TiO2 nanoparticles, the co-catalytic performance of TiO2@ReS2 nanocomposites is investigated, which presents dramatically enhanced degradation activity of organic pigments under sunlight illumination in comparison with pure TiO2 nanoparticles. The underlying mechanism of enhanced photocatalytic activity can be attributed to improved separation efficiency of photogenerated electron–hole pairs in TiO2@ReS2 nanocomposites, which is confirmed by photoluminescence analysis and photoelectrochemical measurements. Our results demonstrate that the layered ReS2 NS is a promising two-dimensional supporting platform for photocatalysis and moreover it could also provide a new perspective on TMDs co-catalyst.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2013
·
IF 1.304
Fuhai YU,Junhu WANG,Kunfeng ZHAO,Jie YIN,Changzi JIN,Xin LIU
A series of novel TiO 2 nanocomposite crystals with superior visible-light-driven photocatalytic activity were successfully prepared using a soft chemical solution process involving direct reaction of aqueous H 2 O 2 with a 2-ethoxyethanol solution of tetraisopropyl titanate before calcination of the resulting peroxo-titanium complexes at 500 °C for 4 h. The synthesized TiO 2 samples are composed of anatase and rutile phases , and the ratio of rutile could be continuously tuned from 0 to 96% by altering the 2-ethoxyethanol volume. There are clear red-shifts in the UV-Vis absorption spectra and apparent band gap narrowing for the synthesized TiO 2 in comparison with Evonik P-25. The synthesized TiO 2 samples are found to be much more efficient for methylene blue degradation under visible-light irradiation. The optimized sample (2-ethoxyethanol: 5 ml; rutile in bulk: 46%) exhibits 5-fold higher adsorption capacity and 3-fold higher photocatalytic activity than those of Evonik P-25 (λ ≥ 400 nm). Characterizations including X-ray diffraction and Raman spectroscopy reveal that the surface of the optimized TiO 2 sample only contains a small quantity of rutile. It is concluded that the surface phase composition and distribution of the TiO 2 nanocomposite crystals are essential to their greatly enhanced photocatalytic activities and strong adsorption capacities. In addition, the concentration of defects existing in the synthesized TiO 2 is also regarded to account for these enhanced properties. 摘要 采用新的化学溶液法, 通过不同体积的钛酸四异丙酯的2-乙二醇单乙醚溶液与一定浓度的H 2 O 2 水溶液直接反应并对生成的钛过氧化配合物进行焙烧, 制备了一系列TiO 2 光催化剂. 表征发现, 所得TiO 2 样品为金红石和锐钛矿的纳米复合晶体, 改变2-乙二醇单乙醚的体积可实现金红石相比例在0–96%广范围的调变.与商业二氧化钛P-25相比, 所得的TiO 2 紫外-可见光吸收谱出现明显红移, 间隙能降低, 在可见光照射下, 该样品对亚甲基蓝有良好的降解活性. 当2-乙二醇单乙醚的添加量为5 ml时, 所得样品体相中金红石相比例接近50%, 其光催化活性和吸附性能最好, 可分别是P-25的3倍和5倍. 拉曼光谱结合X射线衍射等表征结果表明, 该样品的表面仅含少量的金红石相. TiO 2 纳米复合晶表面晶相的组成和分布对其光催化降解亚甲基蓝的活性及其吸附能力有直接的影响. 另外, TiO 2 纳米复合晶的缺陷浓度也是增强其光吸收能力, 提高其可见光光催化活性的原因之一.
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2013
·
IF 4.093
Qianqian Wang,Xiaoting Wang,Zhaohui Wang,Jun Huang,Yong Wang
Polyvinylidene fluoride (PVDF) is one of the most extensively used membrane materials, but PVDF membranes suffer deteriorating performances because of the intrinsic hydrophobic nature of PVDF. Significant efforts have been made to improve the hydrophilicity of PVDF membranes; however, there is frequently a tradeoff between the permeability and selectivity of the modified PVDF membranes. In this work, we broke the tradeoff effect by the atomic layer deposition (ALD) of TiO 2 onto the PVDF membranes using TiCl 4 and water as precursors. The vaporized precursors accessed the small membrane pores and produced a conformal and uniform thin layer of TiO 2 that was tightly adhered to the pore walls. We progressively reduced the membrane pores by repeatedly cycling the deposition process until the membrane pores were completely blocked. The deposition of TiO 2 enhanced the hydrophilicity and fouling resistance of the PVDF membranes, which was more evident at higher ALD cycle numbers. We simultaneously achieved greatly improved water flux and retention at 120 ALD cycles as a result of the competing effect of the increased hydrophilicity and reduced pore sizes. Moreover, the water flux could be sensitively tuned by changing the exposure time of the precursors. The thermal stability of the TiO 2 -deposited membranes was enhanced at a low ALD cycle number of 30.
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高影响因子
Reaction Chemistry & Engineering
·
2024
·Vol. 9
·期 6
·1521-1531
·
IF 3.4
Yuxing Sun,Zilong Zhang,Juan Yang,Xiang Wang,Huanjun Peng,Jingdong Peng
Generally, a Bi-doped TiO2 nanocomposite was synthesized by a microwave-assisted hydrothermal method to introduce Bi4Ti3O12 and an oxygen vacancy onto the pristine TiO2. The optimized composite 6Bi–TiO2 exhibits a good photocatalytic ability for degradation of rhodamine B (RhB), and the calculated reaction rate constant is about 13.7 times higher than that of pristine TiO2. After 60 minutes of light irradiation, the 6Bi–TiO2 sample achieved a degradation rate of 95% and that of the pristine TiO2 was 21%. Furthermore, the catalyst retains a good photocatalytic ability after recycling five times. The enhanced photocatalytic ability can be credited to the improved charge separation efficiency, caused by the altered band structure after the anchoring of Bi4Ti3O12, and the oxygen vacancy also plays a crucial role in the degradation process. This study offers insights into the application of a microwave-assisted hydrothermal method in the effective synthesis of Bi4Ti3O12 on TiO2 by a Bi-doping strategy.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Lin Shan,Cai Yurong,Yang Jing,Ruan Feixia,Wu Jun,Sireesh Babu,Yao Xin,Gao Junkuo,Yao Juming
The application of lithium-sulfur batteries is limited due to low electric conductivity of sulfur and “shuttle effect” caused by diffusion of soluble polysulfides to the anode. In this study, self-made mesoporous TiO 2 and commercial Ketjen Black are mixed to obtain a composite material, which is then coated on glass fiber membrane through a slurry method. The modified glass fiber membrane is used as a functional separator in lithium-sulfur battery. The batteries using modified separator show a high initial discharge specific capacity of 1130.3mAh g −1 at 0.2C and an excellent cycling stability of 991.8mAh g −1 even after 60 cycles, and initial discharge specific capacity of 996.7mAh g −1 at 0.5C and 804.3mAh g −1 even after 100 cycles. The improved performance of the battery can be ascribed to effective adsorption of mesoporous TiO 2 to the soluble polysulfides and limit diffusion of the reaction intermediate to anode side . Moreover, the excellent electrical conductivity of Ketjen Black coated on the surface of glass fiber membrane can reduce the internal resistance, activate the absorbed polysulfides, and increase the specific capacity of the lithium-sulfur battery. It is believed that mesoporous TiO 2 and Ketjen Black modified glass fiber membrane effectively suppresses the “shuttle effect” during the cycling and provides a promising approach for high-performance lithium-sulfur batteries.
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高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Yuxin Liu,Lin Chen,Jinwang Li,Rong Chen,Xun Zhu,Dingding Ye,Yang Yang,Qiang Liao
Photocatalytic fuel cell is a promising wastewater treatment technology, which can degrade pollutants and generate electricity simultaneously. However, the development of high-performance photoanode remains a challenge for photocatalytic fuel cells. Inspired by the bionic material of polydopamine, we propose to apply polydopamine to prepare the TiO 2 /g-C 3 N 4 photoanode for enhancing the adsorption of protonated g-C 3 N 4 nanosheets onto TiO 2 via electrostatic interaction, which greatly promotes charge transfer and inhibits electron-hole recombination. Moreover, the polydopamine particles can be converted into plenty of pores during the calcination process, which enhances light scattering and mass transfer. Consequently, the TiO 2 /g-C 3 N 4 photoanode prepared with polydopamine inspiration exhibits superior photoelectrochemical activity than the TiO 2 /g-C 3 N 4 photoanode prepared without using polydopamine and the pristine TiO 2 photoanode, presenting an improvement in the maximal power density by 8.7 % and 70.4 %, respectively. In addition, the effect of the adsorption time of the protonated g-C 3 N 4 nanosheets is also studied. It is shown that an excessive amount of the protonated g-C 3 N 4 nanosheets by increasing the adsorption time leads to more serious recombination and thereby decreases the photoanode performance. This study provides a novel and efficient way to prepare composite photoanode for photoelectrochemical applications.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Zihao Huang,Jiamin Wang,Jiawei Hou,Haoyue Hou,Kaihui Xu,Hao Yuan,Sa Zeng,Tao Meng
Inorganic nanoparticles with excellent anti-ultraviolet ability such as titanium dioxide (TiO 2 ) are extensively utilized in sunscreens to protect against UV-induced skin photodamage and carcinogenesis. However, conventional TiO 2 nanoparticles exhibit inherent photocatalytic activity that generates harmful reactive oxygen species (ROS), which limits their applications as sunscreen. In this work, we firstly apply polysaccharide-polyphenol interaction to the sunscreen application of inorganic UV filters (named TiO 2 -TA-CS). Because of the synergistic effect of corn starch (CS) in enhancing TiO 2 nanoparticles dispersion and blocking ROS, TiO 2 -TA-CS exhibit the enhanced UV absorption and leverages tannic acid (TA) to achieve complete eradication of hydroxyl radicals and superoxide radicals generated by TiO 2 nanoparticles, which superiors to the previous reports of bio-safe sunscreen. Furthermore, the UV absorption capacity of TiO 2 -TA-CS Pickering emulsions is increased by a factor of 2.5 and there is no obvious cytotoxicity in the UV evaluation. Compared with commercial sunscreens, it has lower UV penetration rate and higher SPF value. In vitro studies and cell viability assays collectively confirm the excellent efficacy of the formulated sunscreen in mitigating photoaging and protecting skin cells against UV-induced damage. Therefore, the TiO 2 -TA-CS Pickering emulsions exhibit favorable biocompatibility, high UV protection, and human skin safety, providing a new strategy for sun protection and other medical applications.
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Zhao Jianghui,Cui Huaqiang,Yang Qinqin,Ye Wuyi,Huang Aofeng,Wu Bo,Liu Zhi
Doping has been widely explored as an effective strategy to enhance the photocatalytic performance of TiO 2 under visible light for degrading organic pollutants. However, conventional dopants derived from chemical reagents raise environmental and human safety concerns. In this study, natural down fiber (DF) was innovatively employed as a sustainable and green source of C and N, combined with copper acetate as the copper source, to fabricate C–N–Cu co-doped TiO 2 (C–N–Cu@TiO 2 ) via a facile one-step hydrothermal method. Comprehensive characterization revealed that, compared to pure TiO 2 , the co-doped C–N–Cu@TiO 2 exhibited a narrowed band gap (from 3.11 to 2.83 eV), reduced photoluminescence intensity, and enhanced photocurrent density, indicating improved visible-light absorption and effective suppression of electron–hole recombination. Under simulated one-sun irradiation, C–N–Cu@TiO 2 demonstrated outstanding photocatalytic activity, achieving a high degradation efficiency of 98.20% for methyl orange within 2 h, which is competitive with many reported doped TiO 2 photocatalysts. Trapping experiments identified O 2 − and h + as the primary active species, and a plausible photocatalytic mechanism was proposed accordingly. This work not only confirms the effectiveness of natural DF as an eco-friendly and sustainable doping source, but also encourages further exploration of biomass-derived functional materials for applications in wastewater treatment, photocatalytic hydrogen evolution, carbon dioxide reduction, and related fields.
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高影响因子
危险品化学品经营许可证（带存储）