ACS Omega
·
2022
·
IF 4.132
Zhiwei He,Hanqing Wu,Zhen Shi,Zhe Kong,Shiyu Ma,Yuping Sun,Xianguo Liu
Oily wastewater and oil spills pose a threat to the environment and human health, and porous sponge materials are highly desired for oil/water separation. Herein, we design a new superhydrophobic/superoleophilic TiO2-decorated polyvinyl alcohol (PVA) sponge material for efficient oil/water separation. The TiO2–PVA sponge is obtained by firmly anchoring TiO2 nanoparticles onto the skeleton surface of pristine PVA sponge via the cross-linking reactions between TiO2 nanoparticles and H3BO3 and KH550, followed by the chemical modification of 1H,1H,2H,2H-perfluorodecyltrichlorosilane. The as-prepared TiO2–PVA sponge shows a high water contact angle of 157° (a sliding angle of 5.5°) and an oil contact angle of ∼0°, showing excellent superhydrophobicity and superoleophilicity. The TiO2–PVA sponge exhibits excellent chemical stability, thermal stability, and mechanical durability in terms of immersing it in the corrosive solutions and solvents, boiling it in water, and the sandpaper abrasion test. Moreover, the as-prepared TiO2–PVA sponge possesses excellent absorption capacity of oils or organic solvents ranging from 4.3 to 13.6 times its own weight. More importantly, the as-prepared TiO2–PVA sponge can separate carbon tetrachloride from the oil–water mixture with a separation efficiency of 97.8% with the aid of gravity and maintains a separation efficiency of 96.5% even after 15 cyclic oil/water separation processes. Therefore, the rationally designed superhydrophobic/superoleophilic TiO2–PVA sponge shows great potential in practical applications of dealing with oily wastewater and oil spills.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY
·
2017
·
IF 4.018
Liang Chu,Wei Liu,Aiai Yu,Zhengfei Qin,Ruiyuan Hu,Huazhong Shu,Qiu-Ping Luo,Yonggang Min,Jianping Yang,Xing'ao Li
TiO 2 modification via TiCl 4 treatment has been widely used to improve the power conversion efficiency (PCE) of dye-sensitized solar cells (DSSCs), in which the effects usually attribute to the inhibition of charge recombination by barrier effect. Niobium pentoxide (Nb 2 O 5 ) is considered a promising photoelectrode material for DSSCs. Here we prepared urchin-like orthorhombic Nb 2 O 5 nanospheres consisting of ultrathin nanorods by a hydrothermal method , which were further developed as photoelectrodes for DSSCs. The TiO 2 modification on the urchin-like orthorhombic Nb 2 O 5 nanospheres increases the photocurrent and PCE of the DSSCs. However, the impedance spectroscopy showed that charge recombination was not reduced by the TiO 2 modification. The improvement in the photocurrent and PCE has been attributed to the enhanced absorption of dye molecules (N719). The results indicate that the enhancement of dye absorption for orthorhombic Nb 2 O 5 photoelectrodes is the desirable approach to improve the performance of orthorhombic Nb 2 O 5 -based DSSCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Liangzhong Li,Chang Liu,Ruixue Ma,Yunjiang Yu,Zhaofeng Chang,Xiaohui Zhang,Chenyu Yang,Da Chen,Yang Yu,Wei Li,Yongdi Liu
In this study, Fe 3 O 4 @TiO 2 decorated reduced graphene oxide (RGO) nanosheets were synthesized by loading iron oxide on the surface of RGO nanosheets and subsequently coating by titanium oxide, which can be employed as the persulfate (PS) activator and high-performance adsorbent toward thallium (Tl). PS could be effectively activated by the Fe 3 O 4 @TiO 2 decorated RGO nanosheets due to the presence of RGO and Fe(II), resulting in the rapid oxidation of Tl(I) to Tl(III). The removal of Tl(I) was found to be pH-dependent, with the removal efficiency of more than 88.5% in the pH range of 8.0–12.0 at the optimal PS dosage of 10 mM and material dosage of 0.2 g/L. The surface precipitation of Tl 2 O 3 and enhanced adsorption affinity toward Tl were deduced to be main mechanisms for the extremely efficient removal of Tl(I) ions during the oxidation and adsorption hybrid process. The maximum removal capacity of the material at pH 8.0 was estimated as 673.2 mg/g based on the fitting result from the Langmuir model. Approximately 94.7% of ultimate removal capacity could be accomplished within the first 10 min at the initial Tl concentration of 8.5 mg/L. The PS catalytic oxidation coupled with the adsorption technique using the prepared Fe 3 O 4 @TiO 2 decorated RGO nanosheets were proven to be a promising approach for Tl(I) removal from water.
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
RSC Advances
·
2016
·Vol. 6
·期 101
·98761-98767
·
IF 3.289
Liqun Ma,Shaobo Dong,Zijian He,Yulin Yang,Hongge Jia,Yutao Di,Yanan Tang,Yazhen Wang
In order to develop a new silane coupling agent that can be used as coupling agent and initiator, (3-(tert-butylperoxy)propyl)trimethoxysilane was synthesized by using tert-butyl hydroperoxide and (3-chloropropyl) trimethoxysilane. The new reagent was characterized by 1H-NMR, FT-IR and mass spectroscopy. The thermokinetics of the new reagent was investigated, including thermal stability, decomposition constants (Kd), activation energy (Ea), the heat of decomposition (ΔH) and pre-exponential factor (Ad). In addition, the application of (3-(tert-butylperoxy)propyl)trimethoxysilane on modificating nano-TiO2 and initiating polymerization was studied. The structures of the products of modificating nano-TiO2 and initiating polymerization were verified by XPS, FT-IR. The results indicated that the new reagent had the characteristics of a coupling agent and initiator.
研究领域:
材料化学
·
高分子科学
✓ 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）