RSC Advances
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2022
·Vol. 12
·期 20
·12702-12709
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IF 4.036
Yi Lu,Haibo Pan,Jiafeng Lai,Yuzhou Xia,Lu Chen,Ruowen Liang,Guiyang Yan,Renkung Huang
Effective design of photocatalysts is an effective method to improve the separation of photogenerated carriers, which improves the photocatalytic performance of photocatalysts. In this work, CoCu-ZIF materials with bimetallic structure were synthesized at room temperature for efficient photocatalytic fuel denitrification. The properties and structures of CoCu-ZIF photocatalysts can be effectively controlled by adjusting the molar ratio of cobalt to copper. The as-prepared CoCu-ZIF photocatalysts were characterized by XRD, FT-IR, SEM, TEM, UV-vis, Raman, BET and other techniques. The photoactivity of CoCu-ZIF for the denitrogenation of NCCs has been evaluated using visible light (λ ≥ 420 nm). The results indicate that Co8Cu2-ZIF photocatalysts exhibit excellent photocatalytic properties, in which the denitrification rate almost reached 80% after 4 hours under visible light irradiation, which is higher than the degradation ability of ZIF-67 (38%). Transient photoelectrochemical experiments and EIS Nyquist plots indicate that Co8Cu2-ZIF with unique structure efficiently improves the separation and transfer of photogenerated electron–hole pairs. Moreover, a possible reaction mechanism was proposed by LC-MS analysis.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 29
·16324-16338
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IF 4.22
Gao Qiaofeng,Pan Pengju,Shan Guorong,Du Miao
Smart hydrogels have attracted widespread attention and have displayed comprehensive applications in many fields. The development of a novel type of bilayer hydrogel with synergistic function of anisotropic deformation and photochromic property is extremely challenging. Many previous researches have focused on multiple response hydrogels. However, it hardly achieves the synergy of deformation and color-changing through a method with the advantages of simplicity, stability, practicality, and precise control. Herein, a near-infrared light (NIR) photothermal thermoresponsive graphene oxide/poly( N -isopropylacrylamide- β -cyclodextrin) (PNIPAM- β -CD/GO) hydrogel layer and a reversible photochromic ammonium molybdate tetrahydrate/poly( N -isopropylacrylamide- co - β -cyclodextrin) (PNIPAM- β -CD/Mo 7 ) hydrogel layer were combined to obtain a bilayer hydrogel through the host–guest interactions between β -CD and the isopropyl group of NIPAM, exhibiting integrate anisotropic shape deformation and reversible photochromic behaviors. The designed actuators can undergo complex deformation owing to volume shrinkage caused by the photothermal effect under NIR of the PNIPAM- β -CD/GO layer, while the PNIPAM- β -CD/Mo 7 hydrogel layer shows the characteristics of quickly color changing within 5 s when irradiated by a UV light source. The multiple responsiveness of hydrogels on temperature, NIR irradiation, and UV irradiation displays valuable advantages in multifunctional smart materials, such as intelligent soft robots. Graphical abstract
研究领域:
材料科学
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化学工程
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生物医学工程
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DOI
高影响因子
POLYMER JOURNAL
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2020
·Vol. 52
·期 12
·1323-1331
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IF 2.826
Xia Lei,Zhang Ze,You Ye-Zi
Ring-opening polymerization of lactones has served as one of the most resourceful and versatile methods for the production of polyesters. However, the photocontrolled ring-opening polymerization of lactones with the advantages of being inexpensive, green, and noninvasive, is still rarely reported. In this work, we developed a series of composite photoacid generators containing a common photocatalyst and an onium salt to induce the living/controlled cationic ring-opening polymerization of lactones using benzyl alcohol or butyl alcohol as an initiator under visible light. The wavelength of the light could be easily adjustable by applying different photocatalysts. Moreover, radical species are generated concurrently during the electron transfer processes; as a result, simultaneous living/controlled cationic ring-opening polymerization of lactones and reversible addition–fragmentation chain transfer radical (RAFT) polymerization can be performed using hydroxy group capped trithiocarbonate to produce hybrid block copolymers.
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 6
·4092-4103
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IF 4.682
Chen Zongchen,Jiang Jiwei,Wang Xin,Zhang Hui,Song Bo,Dong Bin
Inspired by the swarming behavior of various bacteria in nature, light-driven micromotor with collective behavior has attracted a great deal of attention, which will be a valuable tool to understand the cooperation and communication between bacterial populations and will contribute to the creation of reconfigurable microrobots and the cooperative transportation of large cargoes. However, it is still challenging to modulate the micromotors’ collective behavior based on local interaction and communication. Herein, we develop a light-powered BiVO 4 -based micromotor with self-propulsion and dynamic ‘predator-bait’ collective behavior, which is based on the photocatalytic reaction of BiVO 4 . The BiVO 4 -based micromotor has great potential in the field of organic pollutant degradation with enhanced apparent rate constant (0.076 min −1 ) which originates from the dynamic ‘predator-bait’ behavior.
研究领域:
材料科学
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环境科学
·
仿生学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2022
·Vol. 23
·期 17
·9609
·
IF 6.208
Zhen Wang,Dongni Shi,Xiaowen Wang,Yibao Chen,Zheng Yuan,Yan Li,Zhixing Ge,Wenguang Yang
The locomotor behavior of creatures in nature can bring a lot of inspiration for the fabrication of soft actuators. In this paper, we fabricated a bionic light-driven swimming soft robot that can perform grasping of tiny objects and achieve the task of object transfer. By adding carbon nanotubes (CNTs), the temperature-sensitive hydrogels can be endowed with light-responsive properties. The fabricated composite hydrogel structure can control the contraction and expansion of volume by light, which is similar to the contraction and diastole behavior of muscles. The oscillation of the fish tail and the grasping action of the normally closed micromanipulator can be achieved by the control of the irradiation of the xenon light source. The bending of the bionic arm can be controlled by the irradiation of a near-infrared (NIR) laser, which transforms the spatial position and posture of the micromanipulator. The proposed scheme is feasible for miniaturized fabrication and application of flexible actuators. This work provides some important insights for the study of light-driven microrobots and light-driven flexible actuators.Keywords:bionic swimming soft robot;micromanipulator;light-driven;flexible actuator;light-responsive hydrogel;DMD;poly-N-isopropylacrylamide (PNIPAM)
研究领域:
材料科学
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生物仿生学
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机器人学
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DOI
PubMed
高影响因子
ACS Omega
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2019
·
IF 2.584
Junlei Zhang,Zhendong Liu,Zhen Ma
Bi2O2CO3/Bi2MoO6 heterojunction catalysts were prepared by treating Bi2MoO6 sheets with aqueous NaHCO3 solutions at room temperature. All the Bi2O2CO3/Bi2MoO6 heterojunctions exhibited higher activities than pristine Bi2MoO6 in the photocatalytic degradation of rhodamine B (RhB), methyl orange, and ciprofloxacin under visible-light irradiation, and the most active photocatalyst was found to be the one with a C/Bi molar ratio of ∼1/2.3. Relevant samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, N2 adsorption–desorption, Fourier transform infrared spectroscopy, and UV–vis spectroscopy. The higher activity of Bi2O2CO3/Bi2MoO6 than pristine Bi2MoO6 is explained by the enhanced separation and transfer of photogenerated electron/hole pairs, as verified by transient photocurrent densities, photoluminescence spectroscopy, and electrochemical impedance spectroscopy. Photogenerated holes (h+) and superoxide radical anions (•O2–) were found to be the main active species. The good reusability of Bi2O2CO3/Bi2MoO6 was testified by cycling degradation of RhB and tetracycline hydrochloride.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Jie Pan,Shirui Wang,Ailian Chen,Yue Chen,Menghan Wang,Yang Chen
As one of the most significant rare-earth oxides, cerium dioxide (ceria, CeO 2 ) has an enormous potential in a variety of materials science applications due to many excellent characteristics. In this work, cubic-phase mesoporous CeO 2 (mCeO 2 ) nanospheres with nanocrystalline frameworks, high Ce 3+ and oxygen vacancy contents, large porosity and specific surface area, were fabricated via a facile solvothermal method using inorganic precursors and without surfactant as a template. The resulting products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), UV–vis diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy , photoluminescence (PL) spectroscopy, and N 2 adsorption-desorption analyses. Raman and XPS results confirmed the presence of Ce 4+ , Ce 3+ and Zr 4+ ions and oxygen vacancies. By comparison with the undoped ones, Zr-doping in mCeO 2 nanospheres contributed to increased concentrations of Ce 3+ (45.25% vs 32.64%) and oxygen vacancy (37.63% vs 27.53%), as well as decreased band gap energies (2.9 vs 3.1 eV). The photocatalytic activities of the pure and Zr-doped mCeO 2 nanospheres were evaluated with the degradation of methylene blue (MB) under visible-light irradiation. The Zr-doped mCeO 2 products exhibited a superior photodegradation rate of ca. 94% after 120 min visible-light illumination. A kinetic study suggested that the reaction followed pseudo-first order rate equation. The optimizations on Zr-doped mCeO 2 nanospheres against structural, optical, and physicochemical properties might be responsible for the enhanced visible-light-driven photocatalytic performance. The plausible photodegradation mechanism over MB dyes of mCeO 2 nanospheres were also proposed. This work is expected to provide an insight view into the design and synthesis of low-cost and high-efficiency CeO 2 -based photocatalysts with improved visible photocatalytic activity.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2022
·
IF 12.545
Liangwen Hao,Weitao Yang,Yan Xu,Tianming Cui,Guoqi Zhu,Weiwei Zeng,Kexin Bian,Hongying Liang,Pengfei Zhang,Bingbo Zhang
The pandemic of highly contagious diseases has put forward urgent requirements for high sensitivity and adaptive capacity of point-of-care testing (POCT). Herein, for the first time, we report an aggregation-induced emission (AIE) dye-energized light-initiated afterglow nanoprobes (named LiAGNPs), implemented onto a lateral flow immunoassay (LFIA) test strip, for diagnosis of two highly contagious diseases, human immunodeficiency virus (HIV) and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) as model validation. The primary working mechanism relies on the cyclically generated singlet oxygen ( 1 O 2 )-triggered time-resolved luminescent signals of LiAGNPs in which AIE dyes (TTMN) and chemiluminescent substrates (SO) are loaded. The designed LiAGNPs were found 2-fold and 32-fold sensitive than the currently used Eu(III)-based time-resolved fluorescent nanoparticles and gold nanoparticles in lateral flow immunoassay (LFIA), respectively. In addition, the extra optical behaviors of nude color and fluorescence of LiAGNPs enable the LFIA platform with the capability of the naked eye and fluorescent detection to satisfy the applications under varying scenarios. In short, the versatile LiAGNPs have great potential as a novel time-resolved reporter in enhancing detection sensitivity and application flexibility with LFIA platform for rapid but sensitive infectious disease diagnostics.
研究领域:
生物医学工程
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分析化学
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传染病学
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纳米技术
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DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2020
·
IF 4.049
Feng Huo,Ting wan,Yaohui Wang,Yuhang Liu,Pran Gopal Karmaker,Xiupei Yang
An enhanced fluorescence detection system of capillary electrophoresis (CE) was equipped with a concave silver mirror, by which the detection sensitivity of light-emitting diode induced fluorescence (LEDIF) can be increased greatly. The silver concave mirror and the cathode window in photomultiplier tube (PMT) were accurately set face to face at the same axis. When the two labeled tumor markers exactly moved to the center of detection window, the emission from analytes are excitated by LED source. Currently, the analytes may be regarded as a luminescent source point. When the source point exactly moves to the focus of the concave mirror, the emission of the labeled sample was collected effectively, enhanced by convergence and reflected by the concave mirror. Then it was sensitively detected by the PMT. The optical mechanism of enhancing detection sensitivity was explored. A simple comparative test on sensitivity was carried out, which aimed to compare sensitivity of the new detection system with concave mirror to that without concave mirror but the other conditions were kept the same. Two tumor markers labeled with FITC were selected for the test, using the simple LEDIF detect system. The results (LOD, 150 nM for L-Leu and L-Val) showed that the detection sensitivity matched with concave mirror reached more 16 times than the detection method without concave mirror.
研究领域:
分析化学
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生物医学工程
·
光学
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DOI
PubMed
高影响因子
Bioactive Materials
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2021
·
IF 14.593
Yilun Luo,Xiaowen Zheng,Peiqi Yuan,Xingyao Ye,Lie Ma
Due to the critical roles of macrophage in immune response and tissue repair, harnessing macrophage phenotypes dynamically to match the tissue healing process on demand attracted many attentions. Although there have developed many advanced platforms with dynamic features for cell manipulation, few studies have designed a dynamic chemical pattern to sequentially polarize macrophage phenotypes and meet the immune requirements at various tissue repair stages. Here, we propose a novel strategy for spatiotemporal manipulation of macrophage phenotypes by a UV-induced dynamic Arg-Gly-Asp (RGD) pattern. By employing a photo-patterning technique and the specific interaction between cyclodextrin (CD) and azobenzene-RGD (Azo-RGD), we prepared a polyethylene glycol-dithiol/polyethylene glycol-norbornene (PEG-SH/PEG-Nor) hydrogel with dynamic RGD-patterned surface. After irradiation with 365-nm UV light, the homogeneous RGD surface was transformed to the RGD-patterned surface which induced morphological transformation of macrophages from round to elongated and subsequent phenotypic transition from pro-inflammation to anti-inflammation. The mechanism of phenotypic polarization induced by RGD pattern was proved to be related to Rho-associated protein kinase 2 (ROCK2). Sequential modulation of macrophage phenotypes by the dynamic RGD-patterned surface provides a remote and non-invasive strategy to manipulate immune reactions and achieve optimized healing outcomes.
研究领域:
生物材料
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组织工程
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免疫学
·
细胞生物学
✓ 已验证
DOI
PubMed
高影响因子
Molecular Catalysis
·
2026
·
IF 4.3
Rongrong Li,Wenbin Huang,Tianyu Bai,Fan Shao,Jingxiao Sun,Shixuan Guo,Qiang Wei,Yasong Zhou
Preparation of BiOCl with abundant active sites via PVP-assisted aqueous/solvothermal method and Its application in photocatalytic CO 2 reduction. • Increased active site facilitates CO 2 adsorption and activation. • The mechanism of action of EG and PVP in the BiOCl crystal growth process has been proposed. Photocatalytic CO₂ conversion represents a promising green approach to mitigate carbon emissions, yet the fast recombination of photogenerated charge carriers severely restricts the catalytic efficiency of conventional photocatalysts. Rational surface and crystal engineering is therefore essential to address this issue. In this work, we report a facile solvothermal synthesis of BiOCl with enriched active sites, where EG and PVP act as co-regulators for crystal growth. The two additives sequentially coordinate with Bi³⁺, and the stronger competitive adsorption of PVP, together with the modulation effect of EG, collaboratively decreases grain size and drives the preferential exposure of catalytically favorable (110) facets. Spectroscopic characterizations confirm the surface functionalization by PVP. Benefiting from the optimized structure, the as-prepared BiOCl delivers a 1.6-fold increase in CO generation rate. More importantly, we establish the molecular-level synergistic mechanism of EG and PVP for (110) facet regulation, and clarify the underlying mechanism of photocatalytic CO 2 reduction over the as-obtained material. The synergistic effect of PVP and EG promotes the exposure of highly active crystal planes on the BiOCl surface. Simultaneously, PVP modification of BiOCl increases the surface charge density, collectively enhancing photocatalytic activity. Download: Download high-res image (189KB) Download: Download full-size image
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2026
·
IF 4.6
Yu Jia-Xin,Yao Xin,Zheng Ru-Yu,Cong Huai-Ping
Hydrogel actuators with intrinsic softness, biocompatibility and large deformability hold great promise for extensive applications in intelligent autonomous soft robotics. However, achieving directionally controllable autonomous motion under constant stimulation remains a key challenge, primarily due to the isotropic and densely crosslinked nature of conventional hydrogel networks, which limits both directional driving forces and efficient mass transport pathways. Here, we report a simple method for the fabrication of curved cylindrical hydrogels with aligned porous channels that enable autonomous rolling under constant light irradiation via directional freezing assembly-assisted in situ photopolymerization. Benefiting from the oriented open-cell network, the hydrogel exhibited fast light-responsive deformation with bending and recovery speeds of 16.5 (°)·s −1 and 24 (°)·s −1 , respectively. Notably, the hydrogel achieved self-sustained rolling under constant light irradiation at a speed of 0.77 mm·s −1 , arising from the synergy of structural anisotropy and geometric curvature. By spatially modulating the irradiation region, the photo-guided direction-steerable rolling could be realized. Additionally, the hydrogel implemented multiple tasks including obstacle crossing, stair climbing and cargo transport, highlighting its potential in biomimetic soft robotic systems.
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产品关联
DOI
高影响因子
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