CHEMOSPHERE
·
2023
·
IF 8.8
Zhengzhong Zhou,Lili Xu,Xue Zhu,Qian Wang,Xiaoshan Meng,Taoli Huhe
In this study, a photocatalytic biochar-TiO 2 (C–Ti) composite was prepared using lignin as carbon precursor, and blended with PVDF polymer to fabricate PVDF/C–Ti MMMs via non-solvent induced phase inversion. The prepared membrane demonstrates both 1.5 times higher initial and recovered fluxes than the similarly prepared PVDF/TiO 2 membrane, suggesting the C–Ti composite can help maintain higher photodegradation efficiency and better anti-fouling performance. In addition, the comparison of PVDF/C–Ti membrane against pristine PVDF membrane show that the reversible fouling and photodegradation reversible fouling of BSA increased from 10.1% to 6.4%–35.1% and 26.6%, respectively. And the FRR of PVDF/C–Ti membrane was 62.12%, 1.8 times that of PVDF membrane. The PVDF/C–Ti membrane was also applied for lignin separation, where the rejection to sodium lignin sulfonate was maintained at about 75%, and the flux recovery ratio after UV irradiation reached 90%. The demonstrated the advantages of PVDF/C–Ti membrane in photocatalytic degradation and antifouling performance.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
Micro & Nano Letters
·
2020
·Vol. 16
·期 1
·39-43
·
IF 0.975
Yawen Zhang,Yilu Bai,Lanlan Ye,Ting Li,Rui Chen,Hong Jin,Hongyan Xia,Hui Xu
In order to improve the rate performance and reduce the cost lithium ion anode, the Li 4 Ti 5 O 12 @TiO 2 (LTO-TO) was prepared by a facile hydrothermal reaction method with a micro-scale TiO 2 as the precursor. The morphologies and microstructures of the pomegranate-like LTO-TO were examined by scanning electron microscopy and transition electron microscopy. The results demonstrate that the nano-LTO particles are located on the surface of the micro TiO 2 . The electrochemical properties of the LTO-TO composites were characterized by galvanostatic charge/discharge. The as-prepared composites present a high capacity of 157.3 mAh g −1 at 0.5 C. Even at a high current density of 10 C, it can still maintain a high capacity of 105.4 mAh g −1 and remains 92.8% (95 mA g −1 ) after 450 cycles. These results indicate that the as-prepared LTO nano/micro-sphere may be a potential anode material for lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Water
·
2025
·Vol. 17
·期 2
·161
·
IF 3
Nan Xiong,Yansen Guo,Yanyan Nie,Yuqing Yao,Zhemian Ying,Wei Zhang,Renduo Liu,Xiaoling Wu,He Zhou,Limin Zhou,Ying Wang,Jian He,Long Yan
As a well-known photocatalyst, TiO2still suffers from rapid electron–hole recombination and limited visible light absorption. To overcome these challenges, the combination of graphene and TiO2has been proposed. However, traditional methods such as ball milling and hydrothermal synthesis face limitations, including high energy consumption and complex procedures. Here, we develop a simple and industrially feasible method to prepare reduced graphene oxide (rGO)-coated TiO2nanoparticles, referred to as rGO-TiO2composites. The optimized rGO-TiO2composites exhibit an enhanced photocatalytic degradation of rhodamine B (RhB) under simulated sunlight conditions, about 99.95% for 4% rGO-TiO2within 80 min. The first-order reaction rate constant (k) of 4% rGO-TiO2(0.0867 min−1) is 5.42 times higher than that of nano TiO2(0.0135 min−1). The key reactive species involved in the degradation process are identified. Additionally, the effects of pH and NaCl concentration on the degradation efficiency of rGO-TiO2are also investigated. The 4% rGO-TiO2composite exhibits an excellent photocatalytic activity within the pH range of 3.87–11.89, and the NaCl concentration does not affect its photocatalytic efficiency. After characterization, the enhanced photocatalytic activity is ascribed to the introduction of rGO and the generation of surface oxygen vacancies (OV) and Ti3+in TiO2crystals.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Yanqin Shi,Yiyi Zhao,Meng Ma,Si Chen,Huiwen He,Yulu Zhu,Xu Wang
For preparing high performance LLDPE film, the photocatalytic activity and the UV absorption capacity of TiO 2 were regulated by the alumina coating content on the surface of TiO 2 . Alumina-coated TiO 2 was prepared by the chemical liquid deposition method, and characterized by element analysis, TGA, FTIR, and morphology observation. The alumina coating layer had been proven to covalently bind to the surface of TiO 2 through Al O Ti bonds, which formed a continuous and dense coating layer, followed by forming a loose flocculent coating layer with the increase of alumina content. The alumina coating layer could significantly reduce the formation of carbonyl group on the LLDPE chains, and enhance UV aging resistance of LLDPE by inhibiting the photocatalytic activity of TiO 2 . Moreover, the dispersion of alumina-coated TiO 2 in the LLDPE matrix was improved. Thus, the transmittance of LLDPE/alumina-coated TiO 2 composites was reduced and the whiteness was improved. Importantly, the continuous and dense alumina coating layer was enough to inhibit the photocatalysis effect of TiO 2 on LLDPE. The further increase of alumina coating content reduced the UV absorption capacity of alumina-coated TiO 2 and its compatibility with the LLDPE matrix. Therefore, the best alumina coating content on the surface of TiO 2 was 1.46 wt% for preparing high performance LLDPE/TiO 2 composites. Highlights Alumina-coated TiO 2 with controllable coating thickness was successfully synthesized. LLDPE/alumina-coated TiO 2 has excellent UV aging resistance and mechanical properties. The photocatalytic activity and UV absorption capacity of TiO 2 could be regulated. 1.46 wt% of alumina coating is the best content for high performance LLDPE/TiO 2 composites.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 2
·2146-2157
·
IF 2.478
Zhong Chengwei,Wei Wei,He Huan,Huangfu Zhuoxi,Wang YiZheng,Yu Jiang
Heterojunction photocatalytic materials have received extensive attention by the researchers. In this work, g-C 3 N 4 /Bi 2 O 3 /TiO 2 (TCB) composites with g-C 3 N 4 as the main body were synthesized via microwave-assisted ball milling and the heat treatment method. The photocatalytic activity was evaluated by the degradation efficiency of rhodamine B (RhB) and methylene blue (MB) under visible or UV light irradiation. TCB with a mass ratio of melamine/TiO 2 /Bi(NO) 3 ·5H 2 O of 30:1:0.25 has the best photocatalytic performance when fabricated at 450 °C in open air, and the degradation efficiency of the as-prepared material to RhB was 48.07% under visible light and 51.18% to MB under UV. The results of morphological structure analysis revealed that there was a flocculent structure on the edge of the g-C 3 N 4 film and the phase of TiO 2 and Bi 2 O 3 changed. The presence of β-Bi 2 O 3 enhanced photocatalytic efficiency of the as-prepared materials. The optical properties analysis confirmed that the structure of the hybrid samples can promote electron–hole pairs separately at multilayer heterogeneous interfaces and the electron can react with O 2 to yield the · \({O}_{2}^{-}\) radical. In summary, the ability of novel spatial structure materials to absorb visible light is enhanced, which are facilitated for photocatalytic activity and have excellent stability. Therefore, the study of ternary heterojunction photocatalytic materials provides a reference for environmental remediation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2017
·
IF 3.034
Fujian Xu,Xiaoming Jiang,Jing Hu,Jinyi Zhang,Zhirong Zou,Xiandeng Hou,Hongjian Yan
Nano g-C 3 N 4 /TiO 2 composite was synthetized and utilized as a novel photocatalyst for enhanced photochemical vapor generation for sample introduction to atomic fluorescence spectrometry . High reduction efficiency for Se (VI) was obtained to facilitate its ultrasensitive determination by atomic fluorescence spectrometry, with a limit of detection of 0.08 ng mL − 1 . The photocatalytic mechanism of this composite was also discussed and demonstrated its highly efficient photocatalytic capacity and promissing applications in trace selenium (VI) determination and extraction.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Xueping Dai,Yan Wang,Xiao Wang,Shengrui Tong,Xiaofeng Xie
The surface adsorption is considered to be a very important factor in photodegradation process, especially in the removal of gaseous pollutants. In this work, nitrogen doped reduced graphene (N-GR)/TiO 2 were synthesized to probe the polarity adsorption and photodegradation characteristics of acetaldehyde (polar) and ethylene (nonpolar). Morphology and properties of the samples were revealed by TEM , Raman spectra , photoluminescence spectra, photocurrent , electron spin resonance and so forth. Adsorption of flowing gas and TPD were used to indicate the adsorption ability of the composites towards acetaldehyde and ethylene. In experiments, the difference of nitrogen doping amount can adjust the polarity of N-GR/TiO 2 composites efficiently and then influence their photodegradation performance. Specifically, the N-GR/TiO 2 showed higher acetaldehyde adsorption capacity than GR/TiO 2 , while the GR/TiO 2 possessed the highest adsorptive abilities in ethylene case. In the subsequent photodegradation tests of flowing acetaldehyde, all of the N-GR/TiO 2 samples had removal efficiencies higher than that of GR/TiO 2 . The highest removal efficiency reached by the 2 N-GR/TiO 2 is around 82%. In the ethylene to contrast, the removal efficiency was obtained as 93.8% by GR/TiO 2 , which is higher than that of the N-doped samples. It can be seen that the high polarity samples could improve the adsorption and photodegradation performance of polar molecules , which could propel the understanding and application of photodegradation technologies.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 1
·592-604
·
IF 2.993
Chen Jin,Wang Enqi,Mu Jiechen,Ai Bing,Zhang Tiezhu,Ge Wenqing,Zhang Lipeng
CNTs–C@TiO 2 composite with 3D networks as electrode has been synthesized for lithium ion batteries (LIBs)/sodium ion batteries (SIBs) by a traditional solvothermal process. The composites were characterized by scanning electron microscopy, field emission electron microscopy, X-ray diffraction, Raman spectroscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The continuous 3D conductive networks, which consisted of acid-treated CNTs, provided numerous attachment sites for TiO 2 particles and carbon layers (similar to a shell) produced by the Ti 4+ -induced polymerization of ethylene glycol, thereby promoting electron and ion transfer. The composites contained 10.09 wt% CNTs (excellent conductor) and 12.75 wt% pyrolytic carbon. The Raman spectra confirmed the high degree of graphitization of the composites, and the improved conductivity resulted in outstanding electrochemical behavior. The electrochemical performance in the Li + /Na + storage of CNTs–C@TiO 2 composites was greatly enhanced, as revealed by this material’s outstanding capacity of 205 mA h g −1 at a current density of 0.1 A g −1 after 200 scanning cycles for LIBs and 148 mA h g −1 at 0.1 A g −1 over 100 cycles for SIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2015
·
IF 7.435
Jianling Zhang,Haigang Yang,Shoubin Xu,Long Yang,Yuanqing Song,Long Jiang,Yi Dan
Conjugated polymer/TiO 2 photocatalysts hold great promise for solar chemical conversion processes by combining the advantages from both the conjugated polymer and the inorganic semiconductor, overcoming the serious drawbacks of fast charge recombination and the limited visible light absorption of inorganic semiconductor through interfacial electron transfer. To address the crucial way to promote the visible light photocatalytic activity of conjugated polymers/TiO 2 photocatalysts, P3HT/TiO 2 composites with strong interfacial interaction between P3HT and TiO 2 , which was demonstrated by the results of X-ray photoelectron spectroscopy and dissolution tests, were prepared by binding cyanoacrylic acid end-groups functionalized P3HT to the surface of TiO 2 . The pseudo-first-order kinetic constants of photocatalytic degradation of model pollutant methyl orange (MO) under visible light with P3HT/TiO 2 composites of monofunctionalized and difunctionalized polymers were 7.06 and 20.18 times as great as that of unfunctionalized polymer, respectively, indicating a remarkably enhanced visible light photocatalytic activities by an order of magnitude with the incorporation of cyanoarrylic acid end-groups. In consideration of their similar morphology, specific surface area, ability of harvesting visible light and adsorption capacities toward MO independent of end-group functionalization, the dramatically enhanced photocatalytic activity arises from the facilitated electron injection and separation of photogenerated carriers owing to strong interfacial interaction between TiO 2 and end-group functionalized P3HT, which was proved to be crucial for photocatalytic capability of conjugated polymer/TiO 2 photocatalysts, providing a new effective direction for the improvement of their visible light photocatalytic activity.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Yunshan Zheng,Fu Chen,Xinling Liu,Xiaoyu Guo,Ye Ying,Yiping Wu,Ying Wen,Haifeng Yang
Rational design of the durable catalysts is an important issue for improving the application performance of synthesized electrocatalysts for methanol oxidation reaction (MOR). In this work, mesoporous Pd 6 Ru 4 /TiO 2-1 composite catalyst is prepared by using two-step reaction. Compared with 20%Pd/C, PdRu, Ru/TiO 2-1 , and Pd/TiO 2-1 catalysts, Pd 6 Ru 4 /TiO 2-1 catalyst has several merits of abundant electrochemical surface areas, excellent electrocatalytic activity and long-term-use stability. Ru doping into Pd/TiO 2-1 greatly optimizes the electronic structure of Pd by decreasing its electron density. Pd 6 Ru 4 /TiO 2-1 also exhibits high turnover number (TON), low activation energy ( ΔEa ) values for MOR, and higher tolerance to CO-poisoning. A satisfactory level of methanol conversion to the final products is validated by chromatographic results. Density functional theory (DFT) calculation could deepen the understanding of excellent tolerance to CO-poisoning.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Haitao Li,Qiang Gao,Guanshuai Wang,Bo Han,Kaisheng Xia,Chenggang Zhou
Catalytic performance of a heterogeneous cobalt-based catalyst for advanced oxidative process (AOP) correlates tightly with its structure and composition. The main objective of this study is to maximize the utilization and accessibility of cobalt sites while enhancing their activity and stability through rational structural and composition designs, and thus to achieve an excellent performance for heterogeneous peroxymonosulfate (PMS) activation. To this end, a novel CoTiO 3 /TiO 2 composite (CTT), composed of CoTiO 3 overlayer on nanosheets-assembled hierarchical TiO 2 nanospheres, was elaborately designed and synthesized. The resulting CTT possessed certain features including CoTiO 3 -rich surface, large surface area (114.8 m 2 g −1 ), and highly open porous channels, which afforded sufficient accessible active sites against undesirable particle agglomeration and shedding. Moreover, cobalt sites of CTT exhibited a higher activity toward PMS than those of Co 3 O 4 due to the composition-induced distinct adsorption nature, easy electron transfer, and strong bond-weakening ability. Benefitting from the unique combination of structural and compositional advantages, CTT manifested remarkable catalytic efficiency, low cobalt leaching (0.078 mg L −1 ), and excellent reusability in activation of PMS for degradation of the emerging antibiotic pollutant metronidazole (MNZ). The potential degradation pathway for MNZ and the catalytic mechanism were further elucidated. The design strategy proposed in this study may provide a new opportunity for future development of high-performance heterogeneous cobalt-based catalysts in remediation of aquatic environment.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2015
·
IF 2.467
Hao Zhao,Fengxian Qiu,Jie Yan,Jie Wang,Xin Li,Dongya Yang
A novel economical and environmentally friendly graphene/palygorskite/TiO 2 (GR/Pal/TiO 2 ) composites adsorbent was prepared and characterized by X-ray diffractometry (XRD), Fourier transform infrared (FTIR), N 2 adsorption/desorption isotherms, transmission electron-microscopy (TEM) and scanning electron microscopy (SEM). The GR/Pal/TiO 2 was applied to removal dye methylene blue (MB) and the optimum conditions of adsorption were investigated. The obtained results indicated that when the dosage of GR/Pal/TiO 2 , reaction temperature and time of the composite are 15 mg/mL, 40 °C and 1 h, respectively, the adsorption efficiency can reach 100%. The adsorption kinetic of MB followed the pseudo-second-order model while the adsorption isotherm confirms to the Langmuir model. The adsorption process is spontaneous and endothermic by thermodynamic study. Compared with other different reported materials, the novel GR/Pal/TiO 2 composite exhibits a high adsorption ability for MB removal. The obtained results demonstrate that the prepared GR/Pal/TiO 2 composites are very promising material for the removal of MB from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）