INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
·
IF 4.084
Zhaohui Huang,Hui Chen,Lei Zhao,Xuan He,Yingying Du,Wei Fang,Weixin Li,Pan Tian
The development of ultraviolet to near-infrared (UV-Vis-NIR) responsive photocatalysts offers a unique opportunity for the full use of solar energy to solve the energy and the environmental problems. Here, successful preparation of a three-dimensional (3D) porous photocatalyst of graphitic carbon nitride quantum dot (CNQDs) modified g-C 3 N 4 /graphene oxide composite aerogel (CNGO/CNQDs) via hydrothermal and vacuum injection method was reported. In this unique ternary 3D photocatalyst, graphene oxide could improve the separation of photogenerated electrons and holes and promote the charge separation, while the aerogel's 3D network structure provided a rich active site. Simultaneously, due to the appropriate up-conversion performance of the nitrogen carbide quantum dots, CNGO/CNQDs achieved a light response from ultraviolet (UV) to near-infrared (NIR). These properties endow it with a good photocatalytic performance. The hydrogen production efficiency of CNGO/CNQDs reached 1231 μmol h −1 , which was 16 times more than that of matrix material . In addition, the apparent quantum yields (AQY) of CNGO/CNQDs at wavelengths of 420 nm and 700 nm were 13% and 0.116%, respectively.
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高影响因子
DYES AND PIGMENTS
·
2019
·
IF 4.018
Tao Ma,Fangjun Huo,Caixia Yin
Recently, the fluorescence detection of H 2 S in biological systems has attracted the attention of many analytical chemists. However, most of H 2 S probes showed shorter fluorescence emission (<600 nm) with fluorescence intensity change induced by H 2 S, which has some disadvantages of shallower tissue penetration and bigger autofluorescence interference. Herein, we have rationally designed a near-infrared and ratiometric fluorescent probe ( YC−1 ) for the detection of H 2 S based on isophorone. The detection process can be monitored by naked-eye. Addition of H 2 S, YC−1 showed that the emission ratios of fluorescence intensity at 540 and 660 nm (I540/I660) with an obvious enhancement from 0.05 to 13.3. Besides, the color of YC−1 changes from pink to yellow. As a probe for H 2 S, YC−1 exhibited better selectivity, better sensitivity and lower detection limits (0.17 μM). Moreover, YC−1 showed lower toxicity to HepG−2 cells and can be used for cell imaging .
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高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 36
·20723-20732
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IF 10.733
Yongkang Bai,Jiwen Zhang,Didi Wen,Bo Yuan,Peiwei Gong,Jiamei Liu,Xin Chen
Near-infrared (NIR) light responsive devices have attracted extensive scientific attention due to their wide range of applications in biomedical devices, soft robotics and wearable electronics. However, the easy fabrication of these devices and the corresponding shape memory materials is still a challenge. Herein, we synthesized a series of novel NIR-induced shape memory ionomers with multistage responsiveness using commercialized polymers as the framework and various metal ions as cross-linked junctions, which exhibit a high shape recovery ratio of over 93%. The light-induced shape memory properties of the ionomer can be freely tailored by merely adjusting the species and content of metal ions due to the specific photothermal effect of each ion. Moreover, the dynamic ionic cross-linked interaction also causes light-induced plasticity, leading to repeatable programming of these ionomers to new permanent shapes without sacrificing their shape memory properties. The combination of these ionomers containing different bridge ions is able to achieve light-induced multistage shape modulation, which was further used to fabricate several devices, such as light-operated actuators and switches, demonstrating their versatile application potential in various fields.
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高影响因子
Journal of Materials Chemistry C
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2019
·Vol. 7
·期 45
·14245-14254
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IF 6.641
Zhongying Wu,Liang Liu,Pin Cheng,Jianglin Fang,Tianchi Xu,Dongzhong Chen
The design and preparation of novel liquid crystalline elastomers (LCEs) are highly desirable for the development of smart soft materials with quick stimuli-responsive characteristics. In this work, we present a facile preparation strategy of near infrared (NIR)-responsive gold nanorod/liquid crystalline elastomer (GNR/LCE) composite films exhibiting fascinating re-shapeable and reusable properties. A random side-chain liquid crystalline copolymer containing biphenyl mesogens and cinnamate side groups has been prepared via ring-opening metathesis polymerization (ROMP), with the [2+2] (retro)cycloaddition of cinnamate groups triggered by various wavelength UV light serving as the reversible dynamic crosslinks for the construction of re-shapeable LCEs. The GNR/LCE composite films with uniformly doped monodisperse GNRs demonstrate remarkable photothermal effects and multi-mode NIR-driven macroscopic deformation capabilities. Furthermore, a single-layer dual-phase composite film composed of periodic micro-patterned monodomain (M) and polydomain (P) structures has been fabricated, which is promising for precise localized NIR-responsive actuation and fully photo-controlled LCE composite devices.
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高影响因子
ACS Applied Bio Materials
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2018
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IF 0
Yang Zhang,Guohua Jiang,Wenjie Hong,Mengyue Gao,Bin Xu,Jiangying Zhu,Gao Song,Tianqi Liu
Herein, an NIR-responsive polymeric microneedle (MN) system incorporated with metformin-loaded and polydopamine/lauric-acid-coated (PDA/LA-coated) hollow mesoporous SiO2 has been developed for transdermal delivery of antidiabetic drug (metformin). First, an antidiabetic drug was loaded within hollow mesoporous SiO2 nanoparticles (HMSNs) by a diffusion method. Then, PDA as photothermal conversion agent and lauric acid (LA) as phase change material (PCM) were coated onto the HMSN to form NIR-responsive drug nanocarriers. Finally, these metformin-loaded and PDA/LA-coated HMSNs were encapsulated into poly(vinylpyrrolidone) (PVP) MNs. After insertion into skin tissue, LA could melt with the photothermal conversion of PDA under NIR light, thus enabling release of encapsulated metformin from MNs. The in vivo release behavior of metformin from MNs into skin was further studied to investigate its hypoglycemic effect on diabetic rats. Compared with the subcutaneous injection of metformin, the bioavailability of MN–NIR groups was 95.8 ± 2.7%. The antidiabetic drug can be precisely released by adjustment of exposure time and power densities of NIR light.
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PubMed
BIOMATERIALS
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2015
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IF 8.557
Leyong Zeng,Yuanwei Pan,Ying Tian,Xin Wang,Wenzhi Ren,Shouju Wang,Guangming Lu,Aiguo Wu
The combination therapy has exhibited important potential for the treatment of cancers, especially for drug-resistant cancers. In this report, bi-functional nanoprobes based on doxorubicin (DOX)-loaded NaYF 4 :Yb/Tm–TiO 2 inorganic photosensitizers (FA-NPs-DOX) were synthesized for in vivo near infrared (NIR)-triggered inorganic photodynamic therapy (PDT) and enhanced chemotherapy to overcome the multidrug resistance (MDR) in breast cancers. Using the up-conversion luminescence (UCL) performance of NaYF 4 :Yb/Tm converting near-infrared (NIR) into ultraviolent (UV) lights, reactive oxygen species (ROS) were triggered from TiO 2 inorganic photosensitizers for PDT under the irradiation of a 980 nm laser, by which the deep-penetration and low photo-damage could be reached. Moreover, nanocarrier delivery and folic acid (FA) targeting promoted the cellular uptake, and accelerated the release of DOX in drug-sensitive MCF-7 and resistant MCF-7/ADR cells. The toxicity assessment in vitro and in vivo revealed the good biocompatibility of the as-prepared FA-NPs-DOX nanocomposites . By the combination of enhanced chemotherapy and NIR-triggered inorganic PDT, the viability of MCF-7/ADR cells could decrease by 53.5%, and the inhibition rate of MCF-7/ADR tumors could increase up to 90.33%, compared with free DOX. Therefore, the MDR of breast cancers could be obviously overcome by enhanced chemotherapy and NIR-triggered inorganic PDT of FA-NPs-DOX nanocomposites under the excitation of a 980 nm laser.
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PubMed
高影响因子
Nanoscale
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2015
·Vol. 7
·期 28
·11962-11970
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IF 7.394
Zhiyin Xiao,Xiaohong Jiang,Bo Li,Xijian Liu,Xiaojuan Huang,Yuxin Zhang,Qilong Ren,Jie Luo,Zongyi Qin,Junqing Hu
Metal oxides are receiving an incremental attention in recent years for their potential applications in ablation of cancer cells due to their efficient photothermal conversion and good biocompatibility, but the large sizes and poor photo-stability will seriously limit their practical application. Herein, hydrous RuO2 nanoparticles were synthesized by a facile hydrothermal treatment and surface-modified with polyvinylpyrrolidone (PVP) coating. PVP-coated RuO2 nanoparticles exhibit a well dispertion in saline solution, strong characteristic plasmonic absorption in NIR region, enhanced photothermal conversion efficiency of 54.8% and remarkable photo-stability under the irridation of an 808 nm laser. The nanoparticles were further employed as a new photothermal ablation agent for cancer cells which led rapidly to cellular deaths both in vitro and in vivo.
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2013
·Vol. 23
·期 47
·5910-5915
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IF 9.765
Jie Chang,Yanhui Ning,Suli Wu,Wenbin Niu,Shufen Zhang
TiO 2 /NaYF 4 :Yb 3+ ,Er 3+ nano-heterostructures are prepared in situ on the TiO 2 photoanode of dye-sensitized solar cells (DSCs). Transmission electron microscopy (TEM) and high-resolution (HR)-TEM confirm the formation of TiO 2 /NaYF 4 :Yb 3+ ,Er 3+ nano-heterostructures. The up-converted fluorescence spectrum of the photoanode containing the nano-heterostructure confirms electron injection from NaYF 4 :Yb 3+ ,Er 3+ to the condution band (CB) of TiO 2 . When using a photoanode containing the nano-heterostructure in a DSC, the overall efficiency ( η ) of the device is 17% higher than that of a device without the up-conversion nanoparticles (UCNPs) and 13% higher than that of a device containing mixed TiO 2 and UCNPs. Nano-heterostructures of TiO 2 /NaYF 4 :Yb 3+ ,Tm 3+ and TiO 2 /NaYF 4 :Yb 3+ ,Ho 3+ can also be prepared in situ on TiO 2 photoanodes. The overall efficiency of the device containing TiO 2 /NaYF 4 :Yb 3+ ,Ho 3+ nano-heterostructures is 15% higher than the control device without UCNPs. When nano-heterostructures of TiO 2 /NaYF 4 :Yb 3+ ,Tm 3+ are used, the open-circuit voltage ( V oc ) and the short-circuit current density ( J sc ) are all slightly decreased. The effect of the different UCNPs results from the different energy levels of Er 3+ , Tm 3+ , and Ho 3+ . These results demonstrate that utilizing the UCNPs with the apporpriate energy levels can lead to effective electron injection from the UCNPs to the CB of TiO 2 , effectively improving the photocurrent and overall efficiency of DSCs while using NIR light.
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高影响因子
VIBRATIONAL SPECTROSCOPY
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2015
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IF 2.003
Xiaoxiao Ding,Ying Guo,Yongnian Ni,Serge Kokot
Near-infrared (NIR) spectroscopy is a well-known, rapid and non-destructive technique suitable for analyses of many different food products. In this work, it was used to develop a novel method for the analysis of dehydrated tomato samples, collected from four different producers. The NIR spectra from such samples were discriminated according to the four production sources, with the use of principal component analysis (PCA). Also, hierarchical cluster analysis (HCA), linear discriminant analysis (LDA) and K-nearest neighbors (KNN) were successfully used for pattern recognition. The prediction rates were 100% for assigning producers to samples. Two multivariate calibration models—partial least squares regression (PLSR) and radial basis function neural networks (RBF-NN), were applied for quantitative analysis. NIRS calibration models were established for the determination of lycopene and total acid, sugar, phenols and antioxidant activity in dehydrated tomatoes. These calibrations were then used for prediction of unknown, dehydrated tomato samples with satisfactory results. The RBF-NN results were better than those obtained from the PLSR models, and the better predictions suggested that the novel NIR spectroscopic method supported by chemometrics, is suitable for the discrimination and prediction of the five quality parameters in the dehydrated tomato products.
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高影响因子
OPTICAL MATERIALS
·
2014
·
IF 2.075
Quntao Tang,Honglie Shen,Jing Jiao,Weilong Chen
ZnO:Er, Li light conversion film has been successfully fabricated by sol–gel method. XRD measurement demonstrated the successful incorporation of Er 3+ and Li + into ZnO films. The as-grown film co-doped with 2% Er 3+ and 3% Li + is featured with a transmittance of about 86.8% in the range of 400–900 nm. Moreover, the film exhibits a visible light emission either being excited by 355 nm or 980 nm. Due to its relatively high transmittance characteristics and promising properties of converting both UV and NIR light to visible light, the developed film is considered to have a potential application in novel light conversion devices including solar cells.
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高影响因子
Small
·
2016
·Vol. 12
·期 20
·2731-2740
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IF 8.315
Zuhong Li,Haibo Wang,Yangjun Chen,Yin Wang,Huan Li,Haijie Han,Tingting Chen,Qiao Jin,Jian Ji
Despite the exciting advances in cancer chemotherapy over past decades, drug resistance in cancer treatment remains one of the primary reasons for therapeutic failure. IR-780 loaded pH-responsive polymeric prodrug micelles with near infrared (NIR) photothermal effect are developed to circumvent the drug resistance in cancer treatment. The polymeric prodrug micelles are stable in physiological environment, while exhibit fast doxorubicin (DOX) release in acidic condition and significant temperature elevation under NIR laser irradiation. Phosphorylcholine-based biomimetic micellar shell and acid-sensitive drug conjugation endow them with prolonged circulation time and reduced premature drug release during circulation to conduct tumor site-specific chemotherapy. The polymeric prodrug micelles combined with NIR laser irradiation could significantly enhance intracellular DOX accumulation and synergistically induce the cell apoptosis in DOX-resistant MCF-7/ADR cells. Meanwhile, the tumor site-specific chemotherapy combined with hyperthermia effect induces significant inhibition of MCF-7/ADR tumor growth in tumor-bearing mice. These results demonstrate that the well-designed IR-780 loaded polymeric prodrug micelles for hyperthermia-assisted site-specific chemotherapy present an effective approach to reverse drug resistance.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 38
·15170-15179
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IF 4.177
Lin Zhou,Enyi Chen,Weiwei Jin,Yue Wang,Jiahong Zhou,Shaohua Wei
Carboxyl group modified zinc phthalocyanines (ZnPc) are classic and widely used photosensitizers (PSs) in upconversion nanoparticles (UCNPs) mediated photodynamic therapy (PDT) for tumor treatment. To improve the PDT activity of the complex system of ZnPc and UCNPs, many UCNPs with high red emission intensity were design and prepared. ZnPc-(COOH)4 tends to aggregate both in water and under physiological conditions, which can sharply decrease its PDT activity. Therefore, choosing monomeric COOH groups modified ZnPc as PSs is an alternative way to improve their activity. In this manuscript, three zinc(II) phthalocyanines, substituted with 4 (ZnPc-(COOH)4), 8 (ZnPc-(COOH)8) and 16 (ZnPc-(COOH)16) COOH groups, were synthesized. A comparison of the results indicated that ZnPc-(COOH)16 existed in its monomeric form under physiological conditions because of its large substituents. Moreover, ZnPc-(COOH)16 showed superior singlet oxygen (1O2) generation ability when compared to ZnPc-(COOH)4 and ZnPc-(COOH)8. Therefore, we chose ZnPc-(COOH)16 as PSs for absorption on the surface of the UCNPs. Then, they were encapsulated by crosslinked methacrylated hyaluronic acid (m-HA), which provides active tumor accumulation ability by binding its overexpressed receptors on the surface of cancer cells. The resulting nanoparticles can be effectively taken up by cancer cells and shows strong near-infrared (NIR) light triggered PDT in vitro.
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高影响因子
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