9 research outputs found
New Type Photocatalyst PbBiO<sub>2</sub>Cl: Materials Design and Experimental Validation
A new kind of nanostructured photocatalyst,
PbBiO<sub>2</sub>Cl
is synthesized by a simple hydrothermal method. The proposed formation
mechanism of PbBiO<sub>2</sub>Cl is carried out by analyzing the XRD
patterns and SEM images of the products prepared under different conditions.
The PbBiO<sub>2</sub>Cl nanostructure behaves as a truncated bipyramid,
exposed with {002} and {103} facets. Moreover, theoretical calculation
and absorption spectrum indicate the PbBiO<sub>2</sub>Cl shows strong
absorption in the visible region with a band gap of 2.53 eV. The obtained
PbBiO<sub>2</sub>Cl nanostructures exhibit significantly enhanced
photocatalytic activity on degradation of methyl orange (MO) and 4-chlorophonel
(4-CP). This work may offer a paradigm on designing and synthesizing
visible photocatalyst exposed with reactive facets, which can be applied
in many fields
Chelating-Template-Assisted <i>in Situ</i> Encapsulation of Zinc Ferrite Inside Silica Mesopores for Enhanced Gas-Sensing Characteristics
A facile <i>in situ</i> approach has been designed to synthesize zinc ferrite/mesoporous
silica guest–host composites. Chelating surfactant, <i>N</i>-hexadecyl ethylenediamine triacetic acid, was employed
as structure-directing agent to fabricate mesoporous silica skeleton
and simultaneously as complexing agent to incorporate stoichiometric
amounts of zinc and iron ions into silica cavities. On this basis,
spinel zinc ferrite nanoparticles with grain sizes less than 3 nm
were encapsulated in mesoporous channels after calcination. The silica
mesostructure, meanwhile, displayed a successive transformation from
hexagonal <i>p</i>6<i>mm</i> through bicontinuous
cubic <i>Ia</i>3̀…<i>d</i> to lamellar phase
with increasing the dopant concentration in the initial template solution.
In comparison with zinc ferrite nanopowder prepared without silica
host, the composite with bicontinuous architecture exhibited higher
sensitivity, lower detection limit, lower optimum working temperature,
quicker response, and shorter recovery time in sensing performance
toward hydrogen sulfide. The significant improvements are from the
high surface-to-volume ratio of the guest oxides and the three-dimensional
porous structure of the composite. We believe the encapsulation route
presented here may pave the way for directly introducing complex metal
oxide into mesoporous silica matrix with tailorable mesophases for
applications in sensing or other fields
4D-Printed Bionic Soft Robot with Superior Mechanical Properties and Fast Near-Infrared Light Response
Inspired by natural organisms, a four-dimensional (4D)-printed
starfish-like bionic soft robot (SBSR) was effectively prepared by
integrating three-dimensional (3D) printing with smart hydrogels.
The body of the SBSR is composed of a reduced graphene oxide-poly(N-isopropylacrylamide) hydrogel (rGO-PNH) with superior
mechanical properties. In addition, the enhanced photothermal conversion
effect was obtained by the reduction of graphene oxide nanosheets
after the 3D printing process. Cylindrical actuators prepared using
rGO-PNH exhibited bending and orientation toward the light source
within 20 s of exposure to near-infrared light, thus demonstrating
the rapid photoresponsivity of rGO-PNH. Furthermore, the 4D-printed
SBSR showcased effective grasping, lifting, and releasing of objects
by mimicking the predatory behavior of starfish. This study would
provide insights into the development of responsive materials in 4D
printable bionic soft robots and their applications in areas such
as biomimetic devices and artificial muscles
4D-Printed Bionic Soft Robot with Superior Mechanical Properties and Fast Near-Infrared Light Response
Inspired by natural organisms, a four-dimensional (4D)-printed
starfish-like bionic soft robot (SBSR) was effectively prepared by
integrating three-dimensional (3D) printing with smart hydrogels.
The body of the SBSR is composed of a reduced graphene oxide-poly(N-isopropylacrylamide) hydrogel (rGO-PNH) with superior
mechanical properties. In addition, the enhanced photothermal conversion
effect was obtained by the reduction of graphene oxide nanosheets
after the 3D printing process. Cylindrical actuators prepared using
rGO-PNH exhibited bending and orientation toward the light source
within 20 s of exposure to near-infrared light, thus demonstrating
the rapid photoresponsivity of rGO-PNH. Furthermore, the 4D-printed
SBSR showcased effective grasping, lifting, and releasing of objects
by mimicking the predatory behavior of starfish. This study would
provide insights into the development of responsive materials in 4D
printable bionic soft robots and their applications in areas such
as biomimetic devices and artificial muscles
4D-Printed Bionic Soft Robot with Superior Mechanical Properties and Fast Near-Infrared Light Response
Inspired by natural organisms, a four-dimensional (4D)-printed
starfish-like bionic soft robot (SBSR) was effectively prepared by
integrating three-dimensional (3D) printing with smart hydrogels.
The body of the SBSR is composed of a reduced graphene oxide-poly(N-isopropylacrylamide) hydrogel (rGO-PNH) with superior
mechanical properties. In addition, the enhanced photothermal conversion
effect was obtained by the reduction of graphene oxide nanosheets
after the 3D printing process. Cylindrical actuators prepared using
rGO-PNH exhibited bending and orientation toward the light source
within 20 s of exposure to near-infrared light, thus demonstrating
the rapid photoresponsivity of rGO-PNH. Furthermore, the 4D-printed
SBSR showcased effective grasping, lifting, and releasing of objects
by mimicking the predatory behavior of starfish. This study would
provide insights into the development of responsive materials in 4D
printable bionic soft robots and their applications in areas such
as biomimetic devices and artificial muscles
4D-Printed Bionic Soft Robot with Superior Mechanical Properties and Fast Near-Infrared Light Response
Inspired by natural organisms, a four-dimensional (4D)-printed
starfish-like bionic soft robot (SBSR) was effectively prepared by
integrating three-dimensional (3D) printing with smart hydrogels.
The body of the SBSR is composed of a reduced graphene oxide-poly(N-isopropylacrylamide) hydrogel (rGO-PNH) with superior
mechanical properties. In addition, the enhanced photothermal conversion
effect was obtained by the reduction of graphene oxide nanosheets
after the 3D printing process. Cylindrical actuators prepared using
rGO-PNH exhibited bending and orientation toward the light source
within 20 s of exposure to near-infrared light, thus demonstrating
the rapid photoresponsivity of rGO-PNH. Furthermore, the 4D-printed
SBSR showcased effective grasping, lifting, and releasing of objects
by mimicking the predatory behavior of starfish. This study would
provide insights into the development of responsive materials in 4D
printable bionic soft robots and their applications in areas such
as biomimetic devices and artificial muscles
4D-Printed Bionic Soft Robot with Superior Mechanical Properties and Fast Near-Infrared Light Response
Inspired by natural organisms, a four-dimensional (4D)-printed
starfish-like bionic soft robot (SBSR) was effectively prepared by
integrating three-dimensional (3D) printing with smart hydrogels.
The body of the SBSR is composed of a reduced graphene oxide-poly(N-isopropylacrylamide) hydrogel (rGO-PNH) with superior
mechanical properties. In addition, the enhanced photothermal conversion
effect was obtained by the reduction of graphene oxide nanosheets
after the 3D printing process. Cylindrical actuators prepared using
rGO-PNH exhibited bending and orientation toward the light source
within 20 s of exposure to near-infrared light, thus demonstrating
the rapid photoresponsivity of rGO-PNH. Furthermore, the 4D-printed
SBSR showcased effective grasping, lifting, and releasing of objects
by mimicking the predatory behavior of starfish. This study would
provide insights into the development of responsive materials in 4D
printable bionic soft robots and their applications in areas such
as biomimetic devices and artificial muscles
4D-Printed Bionic Soft Robot with Superior Mechanical Properties and Fast Near-Infrared Light Response
Inspired by natural organisms, a four-dimensional (4D)-printed
starfish-like bionic soft robot (SBSR) was effectively prepared by
integrating three-dimensional (3D) printing with smart hydrogels.
The body of the SBSR is composed of a reduced graphene oxide-poly(N-isopropylacrylamide) hydrogel (rGO-PNH) with superior
mechanical properties. In addition, the enhanced photothermal conversion
effect was obtained by the reduction of graphene oxide nanosheets
after the 3D printing process. Cylindrical actuators prepared using
rGO-PNH exhibited bending and orientation toward the light source
within 20 s of exposure to near-infrared light, thus demonstrating
the rapid photoresponsivity of rGO-PNH. Furthermore, the 4D-printed
SBSR showcased effective grasping, lifting, and releasing of objects
by mimicking the predatory behavior of starfish. This study would
provide insights into the development of responsive materials in 4D
printable bionic soft robots and their applications in areas such
as biomimetic devices and artificial muscles
4D-Printed Bionic Soft Robot with Superior Mechanical Properties and Fast Near-Infrared Light Response
Inspired by natural organisms, a four-dimensional (4D)-printed
starfish-like bionic soft robot (SBSR) was effectively prepared by
integrating three-dimensional (3D) printing with smart hydrogels.
The body of the SBSR is composed of a reduced graphene oxide-poly(N-isopropylacrylamide) hydrogel (rGO-PNH) with superior
mechanical properties. In addition, the enhanced photothermal conversion
effect was obtained by the reduction of graphene oxide nanosheets
after the 3D printing process. Cylindrical actuators prepared using
rGO-PNH exhibited bending and orientation toward the light source
within 20 s of exposure to near-infrared light, thus demonstrating
the rapid photoresponsivity of rGO-PNH. Furthermore, the 4D-printed
SBSR showcased effective grasping, lifting, and releasing of objects
by mimicking the predatory behavior of starfish. This study would
provide insights into the development of responsive materials in 4D
printable bionic soft robots and their applications in areas such
as biomimetic devices and artificial muscles