RSC Advances
·
2016
·Vol. 6
·期 46
·40137-40146
·
IF 3.289
Changyou Huang,Yuanzhi Hong,Xu Yan,Lisong Xiao,Kai Huang,Wei Gu,Kuili Liu,Weidong Shi
Carbon quantum dot (CQDs) decorated hollow In2S3 microspheres were firstly synthesized by a facile hydrothermal method. CQDs with an average size of 5 nm were attached on the surfaces of hollow In2S3 microspheres. The photocatalytic activities of the as-prepared samples were investigated by the photocatalytic degradation of methyl orange under visible light, and the 3 wt% CQDs/In2S3 sample presented the most efficient photocatalytic activity which was almost 3 times the pure In2S3 sample. On the basis of the active species trapping experiment and ESR analysis, holes and superoxide radicals were proved to be the main active species in the photocatalytic degradation process, and a possible reaction mechanism was proposed.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2016
·
IF 4.179
Pengwei Huo,Yanfeng Tang,Mingjun Zhou,Jinze Li,Zhefei Ye,Changchang Ma,Longbao Yu,Yongsheng Yan
ZnWO 4 -CdS heterostructure photocatalysts have been successfully synthesized by hydrothermal method with assembling CdS on the surface of ZnWO 4 . The obtained composite photocatalysts were characterized by X-ray diffraction, transmission electron microscopy, Raman, thermo-gravimetric analysis, UV–vis diffuse reflectance spectroscopy, photoluminescence and photocurrent measurement. The results show that the interface between ZnWO 4 and CdS is well formed, and the CdS nanoparticles are uniformly distributed onto ZnWO 4 nanorods which could facilitate charge transfer and reduce recombination of photo-generated electrons and holes. Compared with pure ZnWO 4 and CdS, the as-prepared heterostructure photocatalysts exhibit excellent photostability and photodegradation ability of ciprofloxacin (CIP) under visible light irradiation.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2017
·
IF 3.887
Xia Dong,Chang Wei,Jie Liang,Tianjun Liu,Deling Kong,Feng Lv
Controlled drug release with on demand is an important challenge for drug delivery. Near-infrared (NIR) light triggered drug delivery reflected the development of a significant strategy to control drug release based on photothermal effects. Herein, a sustained and controlled drug delivery system was developed based on a PCL–PEG–PCL thermosensitive hydrogel combined with chitosan-multiwalled carbon nanotubes for a near infrared light triggered drug delivery. Carbon nanotubes that incorporate hydrogel can enhance the sustained effect of drug delivery by a dual-stage release and allow drug delivery by controlling light irradiation. This in situ photothermal process was monitored by thermal imaging and the controlled drug delivery of doxorubicin was tracked in real-time by fluorescence imaging in vivo based on the fluorescence ability of the drug using nude mice as models. The results suggest that the photothermal effect of the carbon nanotubes can disrupt the structure of the hydrogel with a gel–sol transition, triggering the release of the drug from the sustained drug delivery system by NIR irradiation while responding on demand. The sustained and controlled drug delivery has the potential to implement the accurate administration of hydrogel-based drug delivery systems.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2016
·Vol. 80
·期 3
·719-727
·
IF 1.473
Sun Shanfu,Sun Mingxuan,Kong Yuanyuan,Fang Yalin,Yao Yuan
Abstract There has been considerable progress in the field of semiconductor photocatalysis; nevertheless, developing low-cost and high-activity photocatalysts are still a challenge at the present. Here, a series of graphene/MoS 2 /Fe 2 O 3 ternary composites (MG/Fe 2 O 3 ) were prepared via a two-step simple hydrothermal process using H 2 MoO 4 , CH 4 N 2 S, graphene oxide, and Fe(NO 3 ) 3 ·9H 2 O as the starting materials, respectively. Various techniques such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, photoluminescence spectra, and UV–Vis diffuse reflectance spectroscopy were adopted to characterize the as-prepared samples. The results suggested that MoS 2 /graphene hybrids were successfully composited with Fe 2 O 3 . A redshift of absorption edge in the light region and more absorption in the visible light region were confirmed for the prepared ternary composites. The highest photocatalytic activity of MG/Fe 2 O 3 composites (3.01 × 10 −3 min −1 ) was observed, which was 1.5 times higher than that of pure Fe 2 O 3 (1.97 × 10 −3 min −1 ). The effect of ultrasound on photocatalytic reactions was investigated, and its photodegradation rate was improved 2.2 times than the photoreactor system without sonication. The results indicated that the positive synergetic effect of the MoS 2 and graphene components in this hybrid cocatalyst, which extended the light response and acted as a charges transfer medium, respectively, is the key to improve photocatalytic performance of Fe 2 O 3 . This research may provide new concepts for the design of high-efficiency photocatalysts and broaden the potential of application of Fe 2 O 3 in photocatalytic fields. Graphical Abstract MoS 2 /graphene/Fe 2 O 3 nanocomposites were successfully fabricated via a simple two-step hydrothermal process and a considerably enhanced activity of visible light-induced photodecomposition of MB was demonstrated.
✓ 已验证
DOI
高影响因子
SOLID STATE SCIENCES
·
2016
·
IF 2.041
Mingming Zou,Lu Feng,Ayyakannu Sundaram Ganeshraja,Fengqiang Xiong,Minghui Yang
Nickel, nitrogen-codoped mesoporous TiO 2 microspheres (Ni–N–TiO 2 ) with high surface area, and an effective direct band gap energy of ∼2.58 eV. Nickel sulfate used as the Ni source and ammonia gas as the N source here. The efficiency of the as-prepared samples was investigated by monitoring the degradation of Rhodamine B under visible light irradiation. The experimental results indicate that Ni-doped mesoporous TiO 2 microspheres show higher photocatalytic activity than mesoporous TiO 2 microspheres under visible light irradiation. It mainly due to that the electron trap level (Ni 2+ /Ni + ) promoting the separation of charge carriers and the oxygen vacancies inducing the visible light absorption. In addition, Ni–N–TiO 2 shows enhanced activity compared with Ni–TiO 2 . Codopants and dopants are found to be uniformly distributed in TiO 2 matrix. Among the all samples the 0.5% molar quantity of Ni dopant and 500 °C 2 h nitriding condition gives the highest photocatalytic activity. The treatment of ammonia gas on Ni–TiO 2 sample induced oxygen vancancies, substitutional and interstitial N. A suitable treatment by ammonia gas also promote separation of charge carriers and the absorption of visible light. The active species generated in the photocatalytic system were also investigated. The strategy presented here gives a promising route towards the development of a metal and non-metal codoped semiconductor materials for applied photocatalysis and related applications.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Min Jiang,Yilin Gao,Zhaoyu Wang,Zhengxin Ding
Spinel CuCo 2 O 4 nanoplates were synthesized through a solvothermal method coupled with a calcination treatment in air. The prepared CuCo 2 O 4 samples were fully characterized by diverse physical and chemical techniques including powder X-ray diffraction (XRD), field emission scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and N 2 sorption measurement. The CuCo 2 O 4 material was developed as an efficient, low-cost and stable cocatalyst to boost photochemical CO 2 conversion with Ru(bpy) 3 2+ as a homogeneous photosensetizer. The catalytic performance of the CuCo 2 O 4 samples was evaluated toward visible-light-driven deoxygenative reduction of CO 2 to CO under mild conditions. Various parameters of the reaction system and the synthesis conditions of CuCo 2 O 4 were investigated and optimized to maximize the catalytic performance of CO 2 reduction system. The stability and the reusability of the CuCo 2 O 4 cocatalyst were examined. Moreover, the CuCo 2 O 4 cocatalyst was further proved to be highly active to promote CO 2 photoreduction catalysed by CdS semiconductor as a heterogeneous light harvester, and markedly reinforced photocatalytic CO 2 reduction performance was achieved.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 57
·36175-36184
·
IF 3.108
Chenglong Wang,Lili Wang,Yi Huang,Yiding Meng,Guangdong Sun,Qinguo Fan,Jianzhong Shao
The reactive pigment composite particles were fabricated by a two-step method. Phthalocyanine Blue (PB) was encapsulated with silica through a Sol–Gel method in the first step, and the encapsulation conditions were optimized. 3-(Trimethoxysilyl)propyl methacrylate was then grafted onto the silica encapsulated organic pigment (EPB) in the second step, and the FT-IR analysis indicated that the relevant functional groups had been introduced onto the EPB. The particle size, hydrophilicity and the color characteristics of the Reactive Phthalocyanine Blue (RPB) changed little in comparison with PB. The photo-polymerization performance of the RPB-based ink showed a certain increase, and the fastness toward crocking of the printed fabrics was coordinately improved.
✓ 已验证
产品关联
DOI
高影响因子
Chinese Physics B
·
2017
·Vol. 26
·期 5
·058101
·
IF 1.223
Ming-Ye Sun,You-Jin Zheng,Lei Zhang,Li-Ping Zhao,Bing Zhang
Carbon nanodots (CDs) with visible absorption band and TiO2 are integrated to enhance the photosensitivity of TiO2. The CD/TiO2 nanocomposites show obvious CD-coverage-dependent photocatalytic performance. The CD/TiO2 nanocomposites with moderate CD coverge exhibit the highest photocatalytic activity after being irradiated with visible light, which is more excellent than that of TiO2. Too little CD coverage could result in poor visible light absorption, which limits the photocatalytic performance of CD/TiO2 nanocomposites. While, too much CD coverage weakens the photocatalytic activity of CD/TiO2 nanocomposites by restraining the extraction of conduction band electrons within TiO2 to generate active oxygen radicals and the electron transfer (ET) process from CDs to TiO2. These results indicate that rational regulation of CD coverage and the realization of efficient ET process are important means to optimize the photocatalytic performance of CD/TiO2 nanocomposites.
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC ELECTRONICS
·
2017
·
IF 3.399
Yidong Zhang,Shujie Wang,Ling Chen,Yan Fang,Huaibin Shen,Zuliang Du
Nickel oxide (NiO), as a kind of p-type transition metal oxide (TMO) has shown promising applications in photoelectric devices . In our work, the NiO nanocrystals (NCs) are fabricated by a simple solvothermal method using tert-butyl alcohol and nickel acetylacetonate as precursors at 200 °C for different reaction times. The diameters and valence band edge of the prepared NiO NCs are increased with the increase reaction time from 12 h, 24 h–36 h. The band gaps of the NiO NCs were decreased with the increase time. Selected area electron diffraction (SAED) shows that the NiO NCs is polycrystalline structure. X-ray diffraction (XRD) indicates that the NiO NCs is cubic crystal form . X-ray photoelectron spectroscopy (XPS) shows that the as-prepared NiO NCs have a core of NiO and some form of Ni 2 O 3 and NiOOH states on its surface. Further, the obtained NiO NCs is applied on quantum dot light-emitting diode (QLED) as hole injection layer (HILs), showing excellent hole injection properties. Particularly, the NiO NCs for 24 h obtains the best results due to its high band gap and pure cubic crystal phase. Highly bright orange-red QLED with peak luminance up to ∼25580 cd m −2 , and current efficiency (CE) of 5.38 cd A −1 are achieved successfully based on the high performance NiO HIL, further, the device obtained relative long operational lifetime of 11491 h, which has been improved by more than 6- fold as compared to 1839 h for the device based on PEDOT.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2016
·
IF 7.354
Yongcai Zhang,Fen Zhang,Zhanjun Yang,Huaiguo Xue,Dionysios D. Dionysiou
This work reports the development of a new efficient visible-light-driven composite photocatalyst comprising SnS 2 nanoflakes and conjugated polymer (CPVC) from the dehydrochlorination of polyvinyl chloride (PVC). The optimum synthesis conditions were explored to obtain the most efficient SnS 2 /CPVC composite photocatalyst. The formation of SnS 2 /CPVC nanocomposites was confirmed by X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, high-resolution transmission electron microscopy, and elemental mapping characterization. The photocatalytic tests demonstrated that SnS 2 /CPVC nanocomposites exhibited not only far higher visible-light-driven photocatalytic activity than SnS 2 nanoflakes, but also good photocatalytic stability and reusability in the reduction of aqueous Cr(VI) under visible-light ( λ > 420 nm) irradiation. The mechanism underlying the improved photocatalytic efficiency of SnS 2 /CPVC nanocomposites was elucidated, based on comparison between the optical, photoelectric, and electrochemical properties of SnS 2 /CPVC nanocomposites and SnS 2 nanoflakes, as well as the matched electronic band structures between SnS 2 and CPVC.
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2016
·
IF 3.698
Fuhua Li,Yapu Kang,Min Chen,Guoguang Liu,Wenying Lv,Kun Yao,Ping Chen,Haoping Huang
Characterized as by X-ray diffraction, scanning electron microscopy and UV–vis diffuse reflectance spectra techniques, BiVO 4 photocatalyst was hydrothermally synthesized. The photocatalytic degradation mechanisms of ibuprofen (IBP) were evaluated in aqueous media via BiVO 4 . Results demonstrated that the prepared photocatalyst corresponded to phase-pure monoclinic scheelite BiVO 4 . The synthesized BiVO 4 showed superior photocatalytic properties under the irradiation of visible-light. The photocatalytic degradation rate of IBP decreased with an increase in the initial IBP concentration. The degradation process followed first-order kinetics model. At an IBP concentration of 10 mg L −1 , while a BiVO 4 concentration of 5.0 g L −1 with pH value of 4.5, the rate of IBP degradation was obtained as 90% after 25 min. The photocatalytic degradation of IBP was primarily accomplished via the generation of superoxide radical ( O 2 • − ) and hydroxyl radicals ( • OH). During the process of degradation, part of the • OH was converted from the O 2 • − . The direct oxidation of holes (h + ) made a minimal contribution to the degradation of IBP.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Experimental Nanoscience
·
2016
·
IF 0.832
L.Z. Pei,N. Lin,T. Wei,H.Y. Yu
Manganese vanadate nanobelts have been synthesised by a simple hydrothermal process using polymer polyvinyl pyrrolidone as the surfactant by adjusting the pH value. The X-ray diffraction, selected area electron diffraction and the high-resolution transmission electron microscopy (TEM) show that the manganese vanadate nanobelts are composed of a single crystalline monoclinic Mn2V2O7 phase. Scanning electron microscopy and TEM observations show that the thickness, width and length of the nanobelts are 20 nm, 350 nm–1 μm and several dozens to several hundreds of micrometres, respectively. The photocatalytic activities of the manganese vanadate nanobelts have been evaluated by the photocatalytic degradation of methylene blue (MB) in an aqueous solution as a model pollutant under the solar light irradiation. After 4 h of the irradiation by the solar light, the MB solution with the volume of 10 mL and the concentration of 10 mg·mL−1 can be totally degraded using 10 mg manganese vanadate nanobelts.
✓ 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）