Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Lei Zhang,Ke Wei,Guangyong Zeng,Qingquan Lin,Xiang Liu,Yonggang Chen,Arijit Sengupta
Membrane based separation technology has great prospects in the treatment of oily wastewater, which involves serious environmental and health concern. In the present investigation, 3-aminopropyltriethoxysilane (APTES) was used to modify MXene nanosheets and amine functionalized carbon nanotubes (ACNTs) was used to control the layer spacing of MXene followed by the fabrication of a series of APTES/MXene-ACNTs composite membranes supported on cellulose acetate (CA) by vacuum filtration. The surface morphology analysis by scanning electron microscope (SEM) and atomic force microscopy (AFM) revealed that, the composite membranes exhibited excellent hydrophilicity as well as high efficiency in oil/water emulsion separation. The rejection ratios of composite membranes for lubricating oil emulsion and vegetable oil emulsion were found to be more than 99%. Compared to the pure MXene membrane M1 (500.7 L·m −2 ·h −1 ·bar −1 ), the pure water flux of the best modified membrane APTES/MXene-ACNTs/CA (M4) reaches up to 2892.8 L·m −2 ·h −1 ·bar −1 . Moreover, the modified membrane shows good anti-fouling and anti-swelling characteristics even after several cyclic consecutive cycles. This work demonstrates a new horizon in the applications of two-dimensional membrane materials.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2021
·
IF 3.739
Han Wang,Shulan Wang,Jingqiao Zhang,Han Wang,Hui Li,Yi Zhao
Several mesostructured cellular foams (MCFs) were prepared and modified for NO adsorption. TMB, NH 4 F and n -heptane were used as swelling agents, and APTES was used as the modified agent. The morphological structure, chemical composition, thermostability were tested to study the effects of the preparation process on the characterizations of materials. NO adsorption ability of the materials were studied and discussed. NH 4 F and n -heptane had better pore swelling effects compared to TMB, however adding TMB together with NH 4 F and n -heptane could not enlarge the pore structure further. The MCFs materials could keep steady below 800 °C, but after grafting APTES on the surface of the materials, the thermogravimetric curve of materials began to decrease at 300 °C. The materials using NH 4 F and n -heptane as the swelling agents, and modified by APTES had better NO adsorption ability, and the selectivity of the materials were decided by the molecular polarity of the adsorbates. After the modification, the hydrophobic effect of the samples could increase because of the alkyl groups in APTES. The adsorption capacity of the materials could keep steady for ten times without the coexisting component, H 2 O, CO 2 and SO 2 all had negative effects on the regeneration of the materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Guoyang Xu,Jing Lin,Xiangqian Gao,Chao Yu,Chengchun Tang,Yang Huang
Development of effective iodine capture materials and techniques is crucial for addressing the diverse applications of iodine and its significance in various contexts, including nuclear pollution control. This study presents the creation of a new 3-Aminopropyltriethoxysilane (APTES)-modified boron nitride (BN) aerogel designed for effective iodine capture. The internal structural units of BN aerogel , specifically the one-dimensional BN fibers, have been successfully functionalized with amine groups, resulting in the formation of an amine-rich SiO x capping layer on the surface of these fibers. The APTES modification not only establishes a stable connection within the internal BN fibers network but also imparts the material with a significant number of iodine capture sites. The resulting aerogel demonstrates an impressive iodine vapor capture capacity of 313.64 wt% at 350 K and atmospheric pressure, and up to 1028.96 mg/g in iodine/n-hexane solution, surpassing the capabilities of pure BN aerogel and most existing iodine capture materials. The excellent iodine capture performance of APTES-modified BN aerogel suggests its promising potential for future applications in iodine capture.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2012
·
IF 3.461
Pingxiao Wu,Yaping Dai,Hang Long,Nengwu Zhu,Ping Li,Jinhua Wu,Zhi Dang
Organo-montmorillonites (organo-Mts) were prepared by grafting with 3-aminopropyl triethoxysilane (APTES), and surface modification which was composed of hexadecyl trimethyl ammonium bromide (HDTMAB) and sodium dodecyl sulfate (SDS) solutions. XRD, BET, FTIR, SEM and Zeta potential analysis were used to characterize the surface and structure properties of the as-obtained products. The XRD and FTIR results showed that APTES was successfully grafted to calcium-saturated montmorillonite (Ca-Mt) and the BET data illustrated that the surface area and microporous volume decreased largely after modification, while the pore diameter increased. Moreover, batch experiments were conducted to investigate the adsorption behavior of Sr(II) on organo-Mts. The experimental results showed that the adsorption capacity of APTES-Mt was 65.6 mg/g, much larger than those of Ca-Mt, SDS-Mt and HDTMAB-Mt (13.23 mg/g, 26.85 mg/g and 3.91 mg/g, respectively) under the chosen conditions. Pseudo-second-order model fitted well with the adsorption kinetic studies for all materials with an equilibrium time of 24 h. Further, the isotherm adsorption could be described well with both Langmuir and DKR models for SDS-Mt, Freundlich model for Ca-Mt and APTES-Mt as well. The Sr(II) removal by Ca-Mt was mainly ion exchange, nevertheless, that by SDS-Mt and APTES-Mt were surface adsorption and ligand adsorption, respectively.
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
RSC Advances
·
2017
·Vol. 7
·期 35
·21758-21767
·
IF 3.108
Yali Bai,Zhenhuan Li,Bowen Cheng,Maliang Zhang,Kunmei Su
U–TiO2 is successfully coated with SiO2 and subsequently well modified by APTES, and the core–shell structure exists on TiO2@SiO2 and TiO2@SiO2/APTES, which greatly reduces aggregation of the TiO2 nanoparticles. The photocatalytic activities of U–TiO2, TiO2@SiO2, and TiO2@SiO2/APTES are evaluated using MB decomposition. Nearly 50% of the MB is degraded after 15 min in the presence of the U–TiO2 under UV radiation (300 W), and only 17.44% and 4.18% of the MB is degraded in the presence of the TiO2@SiO2-0.6 and TiO2@SiO2/APTES-1. However, TiO2@SiO2/APTES-0.6 and TiO2@SiO2-0.2 exhibit excellent UV absorbance capacities, and the TiO2@SiO2/APTES-0.6 achieves 80% of the UV-shielding ability of U–TiO2. Poly(p-phenylene sulfide) (PPS) is an easily photodegraded material and TiO2/PPS is more seriously photodegraded than PPS, however, the TiO2@SiO2/APTES nanoparticles can effectively protect the PPS from UV degradation, owing to their lower photocatalytic activities, higher UV-shielding abilities and easy dispersion in the PPS matrix. The breaking strength retention rate of the 1 wt% TiO2@SiO2/APTES/PPS film shows a maximum increase of 38.26%, and the breaking elongation retention rate increased by 41.64% at 2 wt% TiO2@SiO2/APTES loading. These results reveal that the incorporation of the TiO2@SiO2/APTES nanoparticles into the PPS matrix imparts excellent anti-UV properties to the PPS matrix, leading to a mechanical performance improvement.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Shouren Li,Yuxuan Chen,Xiaolin Zhao,Jiakun Li,Zujun Huang,Jie Wang,Mu Yang,Yingdan He,Songmei Wu,Yu Yu,Kejian Ding
This work developed APTES-modified sodium alginate-based carbon aerogels (Si-SACA) as smart micro-nanocontainers to enhance epoxy coatings (EP) with superior corrosion resistance and autonomous self-healing functionality. The composite achieved a 29.02 % benzotriazole (BTA) loading via Multiple interactions and demonstrated pH-responsive release kinetics. Electrochemical testing revealed that 0.2 wt% BTA@Si-SACA/EP coatings maintained exceptional barrier properties (|Z| f =0.01Hz > 10 10 Ω·cm 2 after 50-day immersion in 3.5 % NaCl), outperforming pure EP by two orders of magnitude. Meanwhile, the scratched 0.2 wt% BTA@Si-SACA/EP coating shows a certain self-repairing ability and corrosion resistance with the rise of the low-frequency modulus value to 5.25 × 10 4 Ω·cm 2 after 48 h of immersion. The self-healing ability comes from the release of BTA molecules and their chelation with the metal substrate to form an inert protective film.
研究领域:
材料科学
·
纳米技术
·
腐蚀工程
·
高分子科学
·
电化学
✓ 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）