NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Peng Shi,Hongju Chen,Shenwen Fang,Rui Liu,Ming Duan
Hydraulic oil is essential for machine operation, but water contamination can impair its functionality and lead to mechanical damage. Traditional dehydration methods, such as evaporation, are energy-intensive and may degrade the oil's quality. While filtration has been used to reduce water content in light oils, its application to highly viscous hydraulic oil remains unexplored. This study introduces a novel filter fabricated using ZnO, TiO₂, and stearic acid (STA)-modified mesh via a hydrothermal approach. The filter demonstrated the ability to reduce the water content in 46# hydraulic oil from 25,000 mg/L to below 162 mg/L, irrespective of the presence of surfactants. Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) spectroscopy, X-ray Photoelectron Spectroscopy (XPS), and performance evaluations suggest that esterification between stearic acid and oxygen groups on the TiO₂ surface is the key mechanism driving the filter's dehydration efficiency. This work represents a significant advancement in the deep dehydration of viscous oils through filtration, offering a low-energy and effective solution for enhancing hydraulic oil performance.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CATALYSIS LETTERS
·
2019
·Vol. 149
·期 7
·2004-2014
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IF 2.372
Wang Jian,Zhao Hainan,Liu Xiaolong,Xu Wenqing,Guo Yangyang,Song Jianfei,Zhu Tingyu
In this work, we presented a detailed evaluation of Ru/TiO 2 (P25) catalysts for the catalytic oxidation of (chloro)-aromatics. The model catalysts were synthesized through wet impregnation. Catalytic evaluations, as well as ICP, BET, XRD and TEM analyses, were conducted. The results indicated that RuO 2 tended to be distributed on the rutile phase of TiO 2 , leading to an inhomogeneous distribution. These Ru/TiO 2 catalysts were very active, especially for chlorobenzene oxidation. The conversions of benzene and chlorobenzene were both suppressed by the introduction of additional water. But the amount of polychlorinated benzenes as by-products was also reduced. However, the activity of the catalyst significantly decreased with an increase in calcination temperature, suggesting that the thermal stability of the catalyst still needed to be improved. Graphical Abstract
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
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2021
·Vol. 39
·期 5
·1310-1318
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IF 6
Jingyu Zhao,Yaru Li,Ping Na
Main observation and conclusion We reported a facile and green hydrothermal strategy to tailor the carbon dots layer (CDL) and oxygen vacancies (Vo) modified on TiO 2 , by using ascorbic acid as CDL precursor and Vo regulator. The amorphous CDL was uniformly coated on the surface of the as prepared CDL@TiO 2– x composites by Ti-O-C bond. With the increase of carbon content, the amorphous CDL gradually became thicker, while the Vo concentration first increased and then decreased. 1.5 CDL@TiO 2– x possessed the highest Vo concentration. With the decoration of CDL and Vo, the photoreduction properties of CDL@TiO 2– x composites were significantly improved. Under simulated solar light and visible light, the reaction rates of 1.5 CDL@TiO 2– x were 9.6 times and 216 times higher than that of pure TiO 2 , respectively. Interestingly, the results discovered that CDL and Vo influenced the properties of CDL@TiO 2– x composites in different ways. The primary function of CDL was to improve the utilization of solar light, and the enhancement of the charge transfer ability was decided by Vo and CDL together. Our work provides a new strategy for the modification of TiO 2 and sheds new light on the respective role of CDL and Vo when they coexist in the catalyst.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2014
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IF 3.552
Yaru Ni,Wei Wang,Wenjuan Huang,Chunhua Lu,Zhongzi Xu
A new idea was employed to simultaneously reduce graphene oxide (GO) and wrap it on the surface of high-reactive anatase TiO 2 for fabricating novel TiO 2 -graphene (GP) hybrid materials. The process was based on the surface negatively charged property of GO. With the introduction of strong chemical interaction between TiO 2 and GP, the GP wrapped TiO 2 gives a strong red-shift of the light absorption edge and a further narrowed bandgap compared to that of GP randomly supported TiO 2 . This structure can also significantly enhance the separation efficiency of photogenerated electrons and holes. Furthermore, in contrast to the normal anatase TiO 2 , as-prepared TiO 2 is dominated with the high-reactive {0 0 1} facet. The superiority of the formed “core–shell” structure is confirmed by photocatalytic degradation of methylene blue (MB) under the xenon lamp and visible light irradiation. New photocatalytic mechanisms are also proposed based on the obtained results. This work may open a new doorway for new significant application of GP to prepare more GP-based high-reactive photocatalysts for environmental protection.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
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2017
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IF 5.951
Miao Kan,Xufang Qian,Taiyang Zhang,Dongting Yue,Yixin Zhao
Here we report a highly active electrochemical water splitting electrode fabricated from colloidal IrOx nanoparticles and nanoporous Si stabilized by conformal TiO2. The colloidal amorphous IrOx nanoparticles are highly active for oxygen evolution reaction. However, their application for water splitting has a dilemma that the traditional annealing process could lead to low activities but the nanoparticles based electrode without annealing usually exhibited low stability. This nanostructured water splitting electrode exhibited both the high activities as the colloidal IrOx nanoparticles and comparable stability as a traditional thermal annealing fabricated electrode. The impedance study revealed that conformal TiO2 significantly inhibits the interface oxidation and maintains the high activity of colloidal IrOx nanoparticles catalysts. The conformal TiO2 interface engineering combined with nanocatalysts would be a promising strategy to achieve balanced activities and stability for water splitting.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2017
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IF 2.625
Yida Lu,Yiping Feng,Fengliang Wang,Xuegang Zou,Zhi-Feng Chen,Ping Chen,Haijin Liu,Yuehan Su,Qianxin Zhang,Guoguang Liu
In this study, a novel and highly efficient ternary photocatalytic ZnFe 2 O 4 /TiO 2 /CDs nanocomposite was successfully synthesized by a hydrothermal method. The properties and structures of the samples were characterized by X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Fourier transform infrared spectrometry (FT-IR), and photoluminescence spectrum (PL). The UV–vis diffuse reflectance spectrum was used to demonstrate that carbon quantum dots could increase the absorption of visible light wavelengths. When compared with TiO 2 /3.00 wt%CDs and ZnFe 2 O 4 /TiO 2 nanocomposites, the ternary photocatalysts exhibited the enhanced photocatalytic activity under solar-spectrum irradiation. A low CDs content of 3.00 wt% in the ternary photocatalysts possessed excellent performance in the decomposition of Rhodamine B (RhB). Act as donator and receiver, CDs can efficiently improve the ability of electron transfer and separate the electron-hole pairs. OH and O 2 − were confirmed to be involved in the photocatalytic degradation of RhB base on the Electron spin resonance (ESR) tests, and the photocatalytic mechanism of the ZnFe 2 O 4 /TiO 2 /3.00 wt%CDs was proposed. After four sequential operational cycles, the ZnFe 2 O 4 /TiO 2 /CDs maintained its photocatalytic efficiency, indicating its high photocatalytic stability. Therefore, our results provide a high efficient photocatalytic nanocomposite that synthetized by a facile method, and have implications in the removal of environmental persistent pollutants under ternary photocatalysts mediated solar degradation
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
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IF 10.319
Xiaotong Feng,Lifen Gu,Naiyu Wang,Qiaosheng Pu,Guangli Liu
Carbon-based adsorption and TiO 2 -based photocatalysis are both safe and low-cost ways of pollutant purification. Constructing C-TiO 2 architectures can effectively improve removal efficiency. However, most of those carbon frames only acted as supporting substrates, exhibiting rather limited synergistic action from TiO 2 and carbon. Herein, Fe/N co-doped nano-TiO 2 wrapped on mesoporous carbon spheres with a core-shell structure was designed. The Fe, N co-doped carbon sphere with a hierarchical structure improved the synergy of adsorption and transfer during the photocatalytic process. Without extra dopant, the Fe and N partly exposed on the surface realized the in-situ migrating into the TiO 2 shell to enhance the interface effect, which significantly promoted the photocatalytic efficiency of the composite. Furthermore, the photocatalytic efficiency of the composite was investigated through two typical pollutants under visible-light irradiation. The degradation efficiencies for rhodamine B and paraxylene were 96.2% in 60 min and 94.1% in 20 min, respectively, with the apparent rate constant of 0.045 min –1 and 0.049 min –1 , 8.3 and 11.4 times of that for bare TiO 2 . The composite is likely advantageous for treating diverse environmental pollutants.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Caiqin Wang,Cheng Qian,Ting Hu,Xiaofei Yang
It is significant to promote the efficiency of solar fuel cells via improving the utilization of solar in photoelectrocatalysis. In this work, hydrogenated TiO 2 (H-TiO 2 ) nanoparticles with Ti 3+ and/or oxygen vacancy (V O ) defects were obtained and have extended light absorption to visible light region. As a photochemical component, H-TiO 2 was further coupled with Au nanoparticles to assemble photoelectrocatalyst to apply in photo-assisted electrooxidation of ethanol. Due to the existence of defects in H-TiO 2 , the peak current density on Au/H-TiO 2 is improved by 5.4% with the assistance of light irradiation, and even up to 18.3% under simulated sunlight illumination, which is much higher than that on Au/W-TiO 2 (W-TiO 2 loaded Au) under the light irradiation. Meanwhile, it is demonstrated that the charge transfer is improved on Au/H-TiO 2 with Vo due to the existence of Vo, improving the separation of excited electrons and holes. Density function theory (DFT) based theoretical calculations illustrate that the energy barrier of reaction intermediates on Au-TiO 2 with Vo defects is lower than that without Vo, indicating that Au-TiO 2 with Vo is more energetically favorable. This work highlights the possibility of using defective semiconductor nanomaterials to combine photocatalysis and electrocatalysis in solar fuel cells and to further improve the efficiency of fuel cells under solar full spectrum.
研究领域:
材料科学
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能源科学
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化学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Wanying Xie,Ji Li,Feiyun Sun,Wenyi Dong,Zijun Dong
Aiming at the fouling problem of PVDF membrane, one novel integrated strategy was used for the first time, including hydrophilic membrane modification and low-pressure operation. Permeability and anti-fouling ability of PVDF were simultaneously improved by nano-TiO 2 embedment. From perspective of operating condition optimization, the concepts of critical flux (J C ) and threshold flux (J TH ) were recommended as fouling-control tools. The J C and J TH of PVDF-TiO 2 membrane were tested by two constant pressure-steps methods, i.e. Constant pressure-step method and Alternating constant pressure-step method. Three indicators, consisting of instant FTTT curves, dFlux/dt condition and TMP-Flux ave curve, were employed to evaluate the J C and J TH of PVDF-TiO 2 membrane. In brief, the J C and J TH of PVDF-TiO 2 were 10.62 and 23.91 L/(m 2 ·h), respectively, which were nearly 3 times of PVDF membrane. Fouling resistance results displayed that protein irreversible fouling of two PVDF membranes were effectively reduced by J C mode and J TH mode. Besides, reversible fouling of PVDF-TiO 2 membrane was controlled well by J C mode meanwhile. The pure water filtration line (PWF line) and the normalized resistance were both used to judge the form of J C of two membranes. As compared with PVDF, it was speculated the enhancement of J C and J TH mainly related to the better hydrophilicity and local hydraulic condition of PVDF-TiO 2 modified membrane.
研究领域:
环境科学
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材料科学
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生物工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Jin Zhang,Suyan Li,Xiaoyu Hu,Lijun Zhang,Yu Chen,Manman Mu,Yadong Bi
It has been a blind spot to compare the modification effect of ester and acid on inorganic photo catalysts. Traditional method is always laborious to realize organic-inorganic combination by the esterification of carboxylic acids with surficial hydroxyls of nano-TiO 2 . Here, a detailed comparison was conducted using m -dipyridyl benzene skeleton (MPB) molecules containing ester or carboxylic acid groups to modify TiO 2 surface with solvothermal method . The result shows that the modification did not affect the crystal structure of TiO 2 , but formed uniformly distributed organic/inorganic binding sites and non-binding sites on its surface, thus the intrinsic UV response activity of TiO 2 can be retained. Combining with the visible light activity of organic/inorganic binding sites, a perfect photogenerated charge transfer system with matching energy levels is constructed, hence the photocatalytic performance is greatly improved. By contrast, the ester derivative of MPB (shorted as EPB) is easier to form stable organic species on the surface of nanoparticles and shows higher catalytic activity than the carboxylic acid derivative of MPB (shorted as APB), thus the study first demonstrated that the low cost and applicable photocatalyst can be obtained with much low dosage of organic modifiers containing ester groups, hence much significant in the design and optimization of catalyst surface. Compared with other reported methods, this modification has the advantages of simple process, low cost, no consumption of precious metals , ease of obtaining high activive and stable catalysts, so it is more prospective in waste water treatment.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ChemPhotoChem
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2025
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IF 3
Mengrong Zhang,Sha Ni,Zichao Yang,Min Zhang,Zhongjie Guan,Jianjun Yang
Graphical Cu-modified monoclinic TiO 2 nanoflowers with OVs (Cu 1 TB-1.5) promote the reactivity and selectivity of CO 2 reduction to CO under visible light. CO selectivity is 99.6%, and the cycling stability is excellent. The Cu 1 TB-1.5 facilitates the formation of the intermediate COOH* during the photocatalytic process, thus improving the yield and selectivity of CO. The photoreduction of CO 2 has attracted extensive attention as a promising solution to global warming. In this study, Cu-modified TiO 2 (B) (CuTB) nanoflowers with oxygen vacancies (OVs) are designed and synthesized via hydrothermal treatment and photodeposition to promote the reactivity and selectivity of CO 2 reduction to CO under visible light. The CO and CH 4 yields of sample Cu 1 TB-1.5 under visible light are 5.72 and 0.02 μmol g −1 h −1 , wherein the CO yield was 15.5 times that of sample TB; its selectivity is 99.6%, and the cycling stability is excellent. OVs can broaden the light absorption of TB to the visible light region, and Cu promotes photoinduced electron transfer from TB to the Cu species and act as an active center. The OVs and Cu can synergistically enhance charge separation, CO 2 adsorption, and CO 2 conversion. The Cu 1 TB-1.5 facilitates the formation of the intermediate COOH* during the photocatalytic process, thus improving the yield and selectivity of CO. This research provides a unique idea for the development of novel highly selective photocatalysts.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2025
·
IF 14.3
Wenjiao Chang,Honghuo Wang,Tingting Wu,Shuting Zhang,Yifan Li,Junying Wang,Yongqiang Yang,Lei Wang
Photocatalytic CO 2 reduction reaction is regarded as a potential strategy to convert greenhouse gases into valuable chemicals. However, achieving photocatalysts with high efficiency and target product selectivity under visible light still faces great challenges. Herein, sub-2 nm RuO 2 @TiO 2 (RTO) nanorods with lattice matching interface are rationally designed and prepared via a hydrothermal reaction step-by-step. Due to the strong interaction of the lattice-matched interface with the Ru-O-Ti bond, new energy levels have emerged at the interface, leading to effective visible light absorbance. Moreover, the photo-generated electrons could be transferred to the RuO 2 efficiently via the lattice-matched interface. As a result, the RTO photocatalyst exhibits superior CO 2 -to-CH 4 conversion performance of 15.6 µmol g −1 with a selectivity of 87.9% under visible light irradiation. Density functional theory (DFT) calculation reveals that the energy barrier of CO* to CO is significantly higher than that of *CHO, resulting in the preferential production of CH 4 . This work provides an effective strategy for designing photocatalyst with promoted visible light absorption and improved product selectivity.
研究领域:
材料科学
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环境科学
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催化化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）