CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Jie Xu,Ming Li,Jianhao Qiu,Xiong-Fei Zhang,Yi Feng,Jianfeng Yao
As ionic liquid analogues, deep eutectic solvents (DESs) have been widely used in many fields in past decades. In this work, a PEGylated deep eutectic solvent (PEGylated DES) was used for the solvothermal synthesis of CdS@CeO 2 core-shell material for the first time. The amount of CeO 2 coating has a remarkable influence on the photocatalytic degradation of tetracycline. When the molar ratio of CeO 2 to CdS is 1:1, the degradation rate of tetracycline is 91.5% under visible light (λ > 420 nm), which is about 1.57 and 10.5 times as that of CdS and CeO 2 , respectively. The enhancement of photocatalytic performance is due to the fast separation of photogenerated electrons, the lower recombination of electron-hole pairs and the smaller band gap, which are demonstrated via UV–vis diffuse, photocurrent density, electrochemical impedance spectroscopy, photoluminescence and Mott-Schokkty measurements. This work provides a new way for the design of a core-shell metal sulfide photocatalyst that can be used in environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2019
·
IF 4.914
Li Guo,Kailai Zhang,Xuanxuan Han,Qiang Zhao,Yuanyuan Zhang,Mian Qi,Danjun Wang,Feng Fu
In this work, a set of novel Cu 2 ZnSnS 4 /Bi 2 WO 6 (CZTS/BWO) two-dimensional (2D)/two-dimensional (2D) type-II heterojunctions with different CZTS weight ratios (1%, 2%, and 5%) were successfully synthesized via a brief secondary solvothermal process. The successful formation of the heterojunctions was affirmed by characterization methods such as X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy. The photocatalytic activity results showed that the prepared CZTS/BWO heterojunctions had excellent photocatalytic behaviors for organic degradation, especially when the mass fraction of CZTS with respect to BWO in the composite was 2%. Moreover, the addition of hydrogen peroxide (H 2 O 2 ) could further improve the dye and antibiotic degradation efficiencies. The reinforced photocatalytic and photo-Fenton degradation performance were primarily attributable to the introduction of BWO, which afforded increased active sites, expanded the solar spectral response range, and accelerated the cycle of Cu(II)/Cu(I); after four cycling times, its catalytic activity did not decrease significantly. In addition, reasonable hypotheses of the photocatalytic and photo-Fenton catalytic mechanisms were formulated. This study is expected to provide a visual approach for designing a novel photo-Fenton catalyst to jointly utilize the photocatalytic and Fenton activities, which can be better applied to the purification of residual organics in wastewater.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Lei-Lei Li,Xing-Liang Yin,Dong-Hui Pang,Xin-Xin Du,Han Xue,Hua-Wei Zhou,Qing-Xia Yao,Huai-Wei Wang,Jun-Chao Qian,Jie Yang,Da-Cheng Li,Jian-Min Dou
Exploration of cost-efficient and high-performance photocatalyst for H 2 evolution by using a facile approach is of great importance. In this manuscript, a facile one-pot method was employed to fabricate MoS 2 /CdS heterostructures with MoS 2 intimately grown on the surface of CdS resulting in the formation of well-defined heterostructures. Screen experiment reveals the optimized photocatalytic H 2 evolution performance of MoS 2 /CdS is far exceeding that of pristine CdS by a factor of more than 162. The outstanding performance can be ascribed to the formation of heterostructures which accelerate charge transportation and separation, and the MoS 2 serving as a cocatalyst for the decrease of H 2 overpotential. Moreover, the photocatalytic mechanism of the MoS 2 /CdS was carefully investigated, which contributes to the deep understanding of the photocatalytic process and the designation of other low-cost and high-efficient photocatalyst.
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Science
·
2019
·Vol. 8
·期 1
·391-404
·
IF 5.251
Guannan Zhang,Xingyu Zhang,Yongqiang Yang,Ruifang Chi,Jing Shi,Ruiqiang Hang,Xiaobo Huang,Xiaohong Yao,Paul K. Chu,Xiangyu Zhang
Prevention of bacterial infection and promotion of osseointegration are two important issues for titanium (Ti) implants in medical research. In addition, after a biofilm is formed on the surface of implants, the immune system and antibiotic therapy may fail. In this work, bio-functionalized titanium dioxide (TiO2)/molybdenum disulfide (MoS2)/polydopamine (PDA)/arginine-glycine-aspartic acid (RGD) nanorod arrays (NAs) are prepared on Ti implants to not only kill bacteria noninvasively upon co-irradiation of 660 nm visible light (VL) and 808 nm near infrared (NIR) light, but also promote the osteogenic activity simultaneously. Dual light irradiation triggers the TiO2/MoS2 NA to generate hyperthermia and reactive oxygen species (ROS) in 10 min. The synergistic effects of the generated hyperthermia and ROS increase the bacterial membrane permeability and bacteria are killed rapidly and efficiently in vitro and in vivo. The biofilm is also eradicated and RGD on the nanorods improves cell adhesion, proliferation, and osteogenic differentiation. The strategy described here for the design of bio-functionalized coatings on Ti implants has great clinical potential in orthopedics, dentistry, and other medical fields.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Li Li,Mingqing Li,Huan Liu,Boya Li,Baohui Wang
BiOI film was electrodeposited deposited on fluorine doped tin oxide (FTO), then it was transformed into a nanoporous BiVO 4 film by annealing at 420 °C. The BiVO 4 /FTO electrode is used as photoelectrochemical (PEC) sensor to detect ascorbic acid (AA) for the first time. Under illumination of low power 20 W LED lamp, the current density of the sensor increases with the increase of AA concentration. The proposed PEC sensor exhibited a sensitive detection for AA in a wide range from 5 μM to 300 μM with a low detection limit of 1 μM (S/N = 3) and sensitivity of 293 μA mM −1 cm −2 . A portable AA detection device was constructed with a 20W LED lamp as the light source, BiVO 4 /FTO electrode as an anode, Pt as a cathode, and ammeter as a photoelectric signal receiver. The concentration of AA detected by this device is close to that measured by the electrochemical workstation (RSD<10%), which makes the sensor practical and portable.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Solomon Tiruneh Dibaba,Riccarda Caputo,Wensong Xi,Jin Z. Zhang,Ruoyan Wei,Qiang Zhang,Jianhua Zhang,Wei Ren,Lining Sun
A novel drug-delivery nanosystem based on near-infrared (NIR) light-degradable antimony nanoparticles (AMNP) have been developed for synergistic chemo–phototherapy in vitro. The monodispersed AMNP were synthesized by using a simple and cost-effective method. Positively charged doxorubicin hydrochloride (DOX) was loaded onto the negatively charged surface of AMNP via electrostatic interaction and finally modified by polyacrylic acid (PAA) to enhance biocompatibility. Under NIR (808 nm) laser irradiation of the AMNP–DOX–PAA nanosystem, not only was high photothermal conversion efficiency of AMNP achieved but also pH-dependent DOX release was enhanced due to laser-induced hyperthermia. As a consequence, almost all of the HeLa cells (around 97%) were killed because of the combined effects of chemotherapy and photothermal therapy. More interestingly, AMNP showed very fast (about 10 min) laser-induced degradation that may help to minimize long-term toxicity after therapy by using same-wavelength NIR laser irradiation (808 nm). Computational total energy calculations and molecular dynamics simulations based on density functional theory (DFT) suggest that the NIR laser irradiation induces a photothermally activated reaction on the surface of AMNP in water, which can lead to surface degradation via the formation of Sb–H bonds first and then Sb–OH bonds upon further increase of temperature. This work demonstrates a simple platform that has potential applications for synergistic and highly effective chemo–photothermal therapy based on photodegradable nanoparticles.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Hongxiang Zhang,Chunxia Wu,Canran Zhang,Bisheng Yan,Jiyuan Guo,Gangyi Zhu,Jun Dai
In this paper, we report the dual-wavelength green-light emission from zinc oxide (ZnO)-nanoseed-decorated p-GaN (gallium nitride)/n-ZnO nanorod/CsPbBr3 quantum dots (QDs) light-emitting diodes (LEDs). At the same time, the effect of ZnO nanoseeds on the p-GaN/n-ZnO nanorod/CsPbBr3 QDs LED performance is deeply studied. ZnO nanoseeds were fabricated by magnetron sputtering and the sol–gel method; then ZnO nanorods were obtained on GaN by hydrothermal treatment to form the p-GaN/n-ZnO nanorod heterojunction, and green CsPbBr3 QDs were further deposited on ZnO nanorod arrays to realize LEDs. The results show that magnetron-sputtering ZnO nanoseeds can induce regular vertical ZnO nanorod arrays, and the corresponding device presents a better electroluminescence (EL) performance. The X-ray diffraction, atomic force microscopy, and EL mechanisms indicate that the p-GaN/n-ZnO nanorod with magnetron-sputtering ZnO nanoseeds has a better crystalline interface. Our results indicate that the p-GaN/n-ZnO nanorod/CsPbBr3 QDs heterojunction structure can be served as dual-wavelength LEDs, and magnetron-sputtering ZnO nanoseeds can give rise to a better EL performance.
✓ 已验证
产品关联
DOI
NANO
·
2019
·
IF 1.293
Jianhua Ge,Jing Xu,Yujie Liu,Long Zhang,Lan Wang,Dehan Wu
Nitrogen photo fixation mediated by various photocatalysts has received extensive concerns in recent years. In this work, a general strategy is proposed to enhance nitrogen photo fixation performance with some W 1 8 O 4 9 -based photocatalysts under visible-light irradiation. A series of photocatalysts were successfully synthesized in the presence of some noble-metal-free transition metals (Fe, Co and Ni) to modify the urchin-like W 1 8 O 4 9 . The resulting photocatalysts were systematically characterized using XRD, SEM, EDS, XPS, PL, N 2 adsorption–desorption isotherms, and DRS. Structural characterization of the photocatalysts revealed that the crystal morphology features were preserved, optional harvesting properties were enhanced, BET specific surface area was extended, and migration efficiency of the photo-induced charge carriers was significantly improved in the modified-W 1 8 O 4 9 materials. Therefore, a progressed nitrogen photo fixation performance was observed. The maximum production of NH 4 + was approximately reached to 2752 μ g ⋅ g − 1 catal. under the optimum reaction conditions. Furthermore, a plausible nitrogen photo fixation mechanism in the presence of the synthesized composites is also proposed.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Yuning Tang,Sa Wang,Xin Zhou,Ying Wu,Shikai Xian,Zhong Li
A facile and efficient room-temperature synthesis approach was proposed to prepare MOF material Cu(Qc) 2 (henceforth called RT-Cu(Qc) 2 ) with ultramicropores. RT-Cu(Qc) 2 was successfully synthesized at room-temperature by means of (Zn, Cu) hydroxyl double salt as intermediate within 1–12 h. The resulting RT-Cu(Qc) 2 exhibited excellent water vapor stability and its C 2 H 6 uptake reached 2.19 mmol/g at 288 K and 1 bar. Its C 2 H 6 /C 2 H 4 and C 2 H 6 /CH 4 uptake ratio at 298 K and 1 bar were up to 3.70 and 22.67, superior to benchmark MAF-49, Cu(Qc) 2 and ZIF-7. Its IAST-predicted C 2 H 6 /C 2 H 4 and C 2 H 6 /CH 4 selectivity reached 4.1 (1:1 v:v) and 35.9 (1:9 v:v) at 288 K and 1 bar, higher than most of ethane-capturing MOFs. Molecular simulation revealed well-defined host–guest match between Cu(Qc) 2 and ethane. Fixed bed experiments confirmed that ethane/ethylene or ethane/methane mixtures can be completely separated using RT-Cu(Qc) 2 . RT-Cu(Qc) 2 has great potential for separation of ethane/ethylene and the recovery of ethane from natural gas.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 8
·期 1
·240-246
·
IF 6.641
Xiaobin Wang,Zhuoyi Li,Wen Ying,Danke Chen,Peipei Li,Zheng Deng,Xinsheng Peng
Fluorescent proteins (FPs) with good photostability and outstanding photoluminescence features are very promising luminous materials for the fabrication of white-light-emitting diodes (WLEDs). However, the requirement of an aqueous environment and poor thermal stability have strongly restricted their wide applications in lighting devices. In this paper, we present a facile strategy to encapsulate R-phycoerythrin (R-PE) fluorescent proteins into a blue metal organic framework (MOF) HSB-W1 (HSB = hydrogenated Schiff base) thin film through a facile solid-confinement conversion process. As a result, R-PE proteins embedded into HSB-W1 crystals are denatured, but exhibit dual color fluorescence emissions including green (518 nm) and red (600, 647 nm) light, while the original single orange light (578 nm) is significantly suppressed. After careful adjustment of R-PE content, the resulting R-PE@HSB-W1 thin film emits high-quality white light with nearly ideal Commission Internationale de I’Eclairage (CIE) coordinates of (0.33, 0.34), a high color rendering index (CRI) value of approximately 85 and a moderately correlated color temperature (CCT) value of 5740 K. Such a strategy can be widely utilized for other fluorescent molecules and luminescent MOFs to design white-light-emitting materials.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 63
·36907-36914
·
IF 3.049
Xiongrui Jiang,Zhiyao Yan,Jing Zhang,Junzheng Gao,Wanxia Huang,Qiwu Shi,Hengzhong Zhang
Black TiO2 has received tremendous attention because of its lattice disorder-induced reduction in the TiO2 bandgap, which yields excellent light absorption and photocatalytic ability. In this report, a highly efficient visible-light-driven black TiO2 photocatalyst was synthesized with a mesoporous hollow shell structure. It provided a higher specific surface area, more reaction sites and enhanced visible light absorption capability, which significantly promoted the photocatalytic reaction. Subsequently, the mesoporous hollow black TiO2 with different lattice disorder-engineering degrees were designed. The structure disorder in the black TiO2 obviously increased with reduction temperature, leading to improved visible light absorption. However, their visible-light-driven photocatalytic efficiency increased first and then decreased. The highest value can be observed for the sample reduced at 350 °C, which was 2-, 1.4- and 5-fold that of the samples reduced at 320 °C, 380 °C and 400 °C, respectively. This contradiction can be ascribed to the varied functions of the surface defects with different concentrations in the black TiO2 during the catalytic process. In particular, the defects at low concentrations boost photocatalysis but reverse photocatalysis at high concentrations when they act as charge recombination centers. This study provides significant insight for the fabrication of high-efficiency visible-light-driven catalytic black TiO2 and the understanding of its catalysis mechanism.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2019
·Vol. 38
·期 1
·87-90
·
IF 2.376
Simin Hou,Shumei Chen,Jian Zhang,Lei Zhang
Summary of main observation and conclusion In order to extend the absorption spectrum of polyoxo-titanium clusters into the visible region, two new heterometal-oxo clusters Ti 4 Cu II 2 Cu I 2 (μ 3 -O) 6 (benzoate) 10 (MeCN) 4 ( PTC-153 ) and Ti 4 Cu II 2 Cu I 2 (μ 3 -O) 6 (benzoate) 8 (CH 3 COO) 2 (MeCN) 4 ( PTC-154 ) were successfully synthesized. Single-crystal X-ray diffraction and X-ray photoelectron spectroscopy studies showed that these two heterometallic Ti 4 Cu 4 -oxo clusters possessed Chinese knot-shape structure and mixed valence Cu 1+/2+ ions. UV-visible spectroscopy analysis demonstrated that the visible light region absorption of PTC-153 and PTC-154 could be significantly enhanced by doping copper. Furthermore, their visible-light driven photocurrent responses were studied by using samples of PTC-153 and PTC-154 as electrode precursors.
✓ 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）