“…This diffraction line has been associated with the (110) crystal plane of rutile [ 25 ]. The pure TiO 2 sample showed anatase as the main crystalline phase (XRD pattern not shown here), which is in line with previous studies [ 25 , 27 , 28 ]. Figure 1 XRD patterns of the samples obtained in this work.…”
Section: Resultssupporting
confidence: 93%
“…Additional diffraction lines at 2 θ = 25.5°, 38.2°, 48.1°, and 54.4° were observed after the growth of TiO 2 on this MOF. These diffraction lines have been attributed to the (101), (004), (220), and (211) crystal planes of anatase [ 28 ]. The main diffraction lines of HKUST-1 were observed at 2 θ around 6.9°, 9.5°, 11.7°, 19.1°, and 26.1°, which are attributed to the (200), (220), (222), (440), and (731) crystal planes [ 49 ].…”
Section: Resultsmentioning
confidence: 99%
“…Also, some of them may have collapsed during the growth of these nanoparticles. It is worth mentioning that the sol–gel method used in this study gives rise to mesoporous TiO 2 samples with SSA of about 170 m 2 g −1 [ 28 ].…”
Section: Discussionmentioning
confidence: 99%
“…Gonçalves et al . [ 27 , 28 ] loaded sol–gel-derived TiO 2 nanoparticles on reduced graphene oxide nanosheets. In this work, metal–organic frameworks (MOFs) were used as support to grow TiO 2 nanoparticles.…”
Organic pollutants have been a significant source of concern in recent years due to their facile dissemination and harmful effects. In this work, two different metal–organic frameworks (MOFs) were initially prepared by hydrothermal treatment, namely aluminum trimesate (MIL-100(Al)) and copper trimesate (HKUST-1). These materials were subsequently submitted to a post-synthetic modification step to grow titania nanoparticles on their surface. Anatase nanoparticles with sizes around 5 nm were successfully anchored on MIL-100(Al), and the concentration of TiO
2
in this sample was about 68 wt.%. This is the first time that this composite (TiO
2
@MIL-100(Al)) is reported in the literature. It showed an improved photocatalytic activity, removing 90% of methylene blue (
k
app
= 1.29 h
−1
), 55% of sodium diclofenac (
k
app
= 0.21 h
−1
), and 62% of ibuprofen (
k
app
= 0.37 h
−1
) after four hours of illumination with UV-A light. A significant concentration (14 µM) of reactive oxygen species (ROS) was detected for this composite. HKUST-1 showed a structural collapse during its post-synthetic modification, leading to a non-porous material and providing fewer sites for the heterogeneous nucleation of titania. This behavior led to a low concentration of rutile nanoparticles on HKUST-1 (9 wt.%). However, the obtained composite (TiO
2
@HKUST) also showed an improved photoactivity compared to HKUST-1, increasing the photodegradation rates evaluated for methylene blue (0.05 h
−1
vs. 0.29 h
−1
), sodium diclofenac (negligible vs. 0.03 h
−1
), and ibuprofen (0.01 h
−1
vs. 0.02 h
−1
). This work brings new insights concerning the preparation of photocatalysts by growing semiconductor nanoparticles on trimesate-based MOFs.
“…This diffraction line has been associated with the (110) crystal plane of rutile [ 25 ]. The pure TiO 2 sample showed anatase as the main crystalline phase (XRD pattern not shown here), which is in line with previous studies [ 25 , 27 , 28 ]. Figure 1 XRD patterns of the samples obtained in this work.…”
Section: Resultssupporting
confidence: 93%
“…Additional diffraction lines at 2 θ = 25.5°, 38.2°, 48.1°, and 54.4° were observed after the growth of TiO 2 on this MOF. These diffraction lines have been attributed to the (101), (004), (220), and (211) crystal planes of anatase [ 28 ]. The main diffraction lines of HKUST-1 were observed at 2 θ around 6.9°, 9.5°, 11.7°, 19.1°, and 26.1°, which are attributed to the (200), (220), (222), (440), and (731) crystal planes [ 49 ].…”
Section: Resultsmentioning
confidence: 99%
“…Also, some of them may have collapsed during the growth of these nanoparticles. It is worth mentioning that the sol–gel method used in this study gives rise to mesoporous TiO 2 samples with SSA of about 170 m 2 g −1 [ 28 ].…”
Section: Discussionmentioning
confidence: 99%
“…Gonçalves et al . [ 27 , 28 ] loaded sol–gel-derived TiO 2 nanoparticles on reduced graphene oxide nanosheets. In this work, metal–organic frameworks (MOFs) were used as support to grow TiO 2 nanoparticles.…”
Organic pollutants have been a significant source of concern in recent years due to their facile dissemination and harmful effects. In this work, two different metal–organic frameworks (MOFs) were initially prepared by hydrothermal treatment, namely aluminum trimesate (MIL-100(Al)) and copper trimesate (HKUST-1). These materials were subsequently submitted to a post-synthetic modification step to grow titania nanoparticles on their surface. Anatase nanoparticles with sizes around 5 nm were successfully anchored on MIL-100(Al), and the concentration of TiO
2
in this sample was about 68 wt.%. This is the first time that this composite (TiO
2
@MIL-100(Al)) is reported in the literature. It showed an improved photocatalytic activity, removing 90% of methylene blue (
k
app
= 1.29 h
−1
), 55% of sodium diclofenac (
k
app
= 0.21 h
−1
), and 62% of ibuprofen (
k
app
= 0.37 h
−1
) after four hours of illumination with UV-A light. A significant concentration (14 µM) of reactive oxygen species (ROS) was detected for this composite. HKUST-1 showed a structural collapse during its post-synthetic modification, leading to a non-porous material and providing fewer sites for the heterogeneous nucleation of titania. This behavior led to a low concentration of rutile nanoparticles on HKUST-1 (9 wt.%). However, the obtained composite (TiO
2
@HKUST) also showed an improved photoactivity compared to HKUST-1, increasing the photodegradation rates evaluated for methylene blue (0.05 h
−1
vs. 0.29 h
−1
), sodium diclofenac (negligible vs. 0.03 h
−1
), and ibuprofen (0.01 h
−1
vs. 0.02 h
−1
). This work brings new insights concerning the preparation of photocatalysts by growing semiconductor nanoparticles on trimesate-based MOFs.
“…[1,13] Therefore, PDMS has been used in various fields su ch as left-handed or double negative materials, [14] cell sheet engineering, [15] artificial skin, [16] flexible device and humidity sensor, [17] and corrosion resistance. [18,19] However, pure PDMS coatings are easy to encounter electrolysis, even experience degradation du e to the penetration of water and electrolyte through existing microspores and microcracks from itse lf structure in the long-term usage. [1,10] Therefore, it is necessary to modify PDMS or prepare PDM S composite coating to meet the actual application requirement.…”
Polydimethylsiloxane (PDMS) composite coatings filled with nanopaticles have been used extensiv ely as anticorrision materials. The alternating multilayer polydimethylsiloxane resin nanocomposite co ating was first fabricated based on stepwise coating method via adding graphene and α-alumina. Th eir mechanical and anticorrosion properties were discussed. The binary fillers greatly improve the ad hesion up to level 1 on the same time the coating remains extreme flexibility. When the graphene is 0.3wt%, the alternating multilayer coating exhibits the best corrosion resistance with the 4.82V of corrosion potential (Ecorr), which increases by near 40 times compared with pure PDMS coating. Meanwhile, the impedance value of composite coating reaches 10 9 Ω•cm 2. The corrosion current den sity (Icorr) of the coating is smaller than that of bare tinplate. The long-term soaking results prove t hat the alternating multilayer composite coating still possess the outstanding corrosion resistance for tinplate after 30 days of immersion.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
