ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Shuhui Wang,Jiawei Zhan,Kui Chen,Asad Ali,Linghui Zeng,He Zhao,Wanglai Hu,Lixin Zhu,Xiaoliang Xu
The visible-light-driven CO2 reduction efficiency is largely restrained by the negative photoabsorption and high recombination rate of electron–hole pairs. It is an effective method to increase the efficiency of CO2 photoreduction by doping alkali metal elements to engineer the electronic properties of the catalyst. Here, we report a new study on the potassium-doped g-C3N4 (K-CN) being used for CO2 reduction irradiated by visible light. DFT calculations and XPS tests show that the potassium doping is interlayer doping, changing the electronic structure of g-C3N4. The higher ID/IG value indicates more structural distortion and defects caused by K doping. K-CNs have enhanced visible-light absorption, and PL spectra demonstrate that the introduction of potassium advances the separation and transmission of photoexcited charge carriers, further confirmed by transient photocurrent response experiment. Under visible light, K-CN-7 achieved efficient CO2 reduction without any noble metal as a cocatalyst, with CO formation rates of 8.7 μmol g–1 h–1, which is 25 times that of ordinary g-C3N4. Our work further validates the importance of inhibiting e–/h+ recombination in improving solar energy conversion efficiency while also bringing hope for efficient solar fuel production using g-C3N4.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Lin Li,Dawei Tang,Yongchen Song,Bo Jiang
Optofluidic microreactors are promising platform for photocatalytic reactions. However, the light transmission phenomenon is serious in optofluidic microreactors which makes a part of solar energy lose in surroundings. To resolve this problem, in this work, a novel dual-film optofluidic microreactor is proposed and fabricated by immobilizing TiO 2 nanorod arrays on both the top and bottom internal wall of the microchamber. Such dual-film structure enables the transmitted light to be utilized by the bottom TiO 2 film instead of being wasted, thus improving the light-harvesting capacity of optofluidic microreactor. Moreover, TiO 2 nanorod arrays are employed as the photocatalytic film in this optofluidic microreactor to enlarge the specific surface area and facilitate the mass transfer. The photocatalytic performance and the kinetic properties of the dual-film optofluidic microreactor are evaluated by photocatalytic degradation of methylene blue. Results show that the proposed dual-film optofluidic microreactor yielded much higher degradation efficiency than the conventional one as a result of enhanced light-harvesting and improved mass transfer. In addition, the long-term testing proves that the durability of the dual-film optofluidic microreactor can be improved by operating it in a periodically rotated manner. In short, the TiO 2 nanorod arrays-based dual-film optofluidic microreactor exhibits efficient light-harvesting and high durability and shows promising potential for photocatalytic applications.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Frontiers in Materials
·
2022
·
IF 3.985
Cao Ying,Li Wenjiao,Quan Fengyu,Xia Yanzhi,Xiong Zhong
Light-responsive hydrogel actuators show attractive biomedical applications for in vivo drug delivery tool, surgical tissue repair operation, and vascular cleaning due to its non-contact, rapid, precise, and remote spatial control of light. Conventional visible–light–responsive hydrogels contain special chemical structure or groups, and the difficulty in synthesis results in that few can be applied to fabricate visible–light–driven hydrogel actuators. In this study, based on photothermal effect, surface-modified Fe3O4 nanoparticles were incorporated into poly(N-isopropylacrylamide-acrylamide) hydrogel by UV photopolymerization, which revealed excellent green–light–responsive volume change. Under a laser irradiation of 200 mW at 520 nm, the bending angle deformation of hydrogel strips with 2.62 wt% Fe3O4 reached 107.8°. Strip-shaped hydrogel actuators could be applied to transport tiny objects. Furthermore, a boomerang-like hydrogel actuator was designed and fabricated to drive floating foam on water. By 12 cycles of continuous laser on–off irradiation to a hydrogel actuator underwater, a circular returning movement of the float was accomplished. The study on driving a float using visible–light–triggered hydrogel actuators provides a new idea for the design of light-driven biomedical devices and soft robots.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
BIOMATERIALS
·
2018
·
IF 8.806
Liping Tong,Qing Liao,Yuetao Zhao,Hao Huang,Ang Gao,Wei Zhang,Xiaoyong Gao,Wei Wei,Min Guan,Paul K. Chu,Huaiyu Wang
Mild heat stimulation can promote the restoration of bone defects but unfortunately, the delivery of exo-hyperthermy into human body is not efficient enough. In this study, mild heat-induced osteogenesis with high efficacy is demonstrated on an osteoimplant composed of black phosphorus nanosheets and poly(lactic- co -glycolic acid) (BPs@PLGA) with the participation of near-infrared (NIR) light irradiation. BPs@PLGA with only 0.2 wt% BPs show the highly-efficient NIR photothermal response even when being covered by a biological tissue as thick as 7 mm. In addition, this composite is completely biodegradable and the final degradation products are harmless H 2 O, CO 2 and PO 4 3− which can serve as necessary bone ingredient. The BPs@PLGA specimen mediated by low intensity and periodic NIR irradiation can effectively up-regulate the expressions of heat shock proteins and finally promote osteogenesis in vitro and in vivo . Boasting good biodegradability and NIR-mediated osteogenetic performances, the BPs@PLGA implant has great potential in orthopedic applications and this study provides new insights into the design and fabrication of new-style osteoimplants which can be remotely controlled.
研究领域:
生物医学工程
·
材料科学
·
骨科
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2015
·Vol. 25
·期 20
·2961-2971
·
IF 11.805
Kai Han,Qi Lei,Shi-Bo Wang,Jing-Jing Hu,Wen-Xiu Qiu,Jing-Yi Zhu,Wei-Na Yin,Xu Luo,Xian-Zheng Zhang
In this paper, a self-delivery system PpIX-PEG-(KLAKLAK) 2 (designated as PPK) is fabricated to realize mitochondria-targeted photodynamic tumor therapy. It is found that the PPK self-delivery system exhibited high drug loading efficacy as well as novel capacity in generation of intracellular reactive oxygen species (ROS). This study also indicated that the photochemical internalization effect of the photosensitizer protoporphyrin IX (PpIX) under a short time light irradiation improved the cellular internalization of PPK. On the contrary, PPK could target to the subcellular organelle mitochondria due to the presence of proapoptosis (KLAKLAK) 2 peptide. Importantly, the in situ generation of ROS in mitochondria enhanced the photodynamic therapy efficacy under another long time irradiation, leading to significant cell death with decreased mitochondrial membrane potential. Besides, relative high tumor accumulation, minimal systemic cytotoxicity and efficacious long-term tumor inhibition in vivo are also confirmed by using a murine model. All these results demonstrated the self-delivery system PPK with a dual-stage light irradiation strategy is a promising nanoplatform for tumor treatment.
研究领域:
生物医学工程
·
肿瘤学
·
药剂学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 24
·245001
·
IF 3.551
Hetong Qi,Xuemei Wu,Hengqi Zhang,Yuhai Tang,Hongfang Gao,Manping Qian,Honglan Qi
Multiple-color emissive carbon dots (C-dots) are gaining increasing attention in various fields. Herein, we report a facile solvothermal method for the synthesis of multiple-color emissive C-dots with the aim of white-light emission. Under single ultraviolet-light excitation, three C-dots emit a easily controlled fluorescent emission wavelength at 440 nm, 500 nm and 610 nm by using different three amines (either ammonium hydroxide, ethylenediamine or p-phenylenediamine, respectively) and pyromellitic dianhydride as molecular precursors while another three C-dots emit a controllable fluorescent emission wavelength at 500 nm, 550 nm and 585 nm by using same three amines and naphthalene-1,4,5,8-tetracarboxylic dianhydride as molecular precursors. The maximum fluorescence wavelength of these C-dots is red-shifted by changing three different amines molecular precursors from ammonium hydroxide, ethylenediamine, to p-phenylenediamine. Furthermore, these C-dots have shown promising applications in the fields of white-light-emitting diodes devices and color printing.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Jinjin Zhang,Luyang Wei,Xiuxia Meng,Fangyong Yu,Naitao Yang,Shaomin Liu
Digital light processing (DLP)-stereolithography three-dimensional (3D) printing is a well known technique for fabricating components with complex geometries. However, the application of DLP 3D printing to functional ceramics such as 8 mol% yttria-stabilized zirconia (8YSZ), which is one of the most extensively used electrolyte materials for solid oxide fuel cells, is still a great challenge. Therefore, the fabrication of fully 8YSZ monoliths via DLP 3D printing was attempted herein, including the preparation of UV-curable ceramic suspensions, shaping of green bodies, and debinding and sintering. The results show that intact green bodies printed using a 30 vol% 8YSZ-photosensitive resin suspension with 0.1 wt% oleic acid as the dispersant under the optimized printing conditions was sufficiently dense without connected pores after vacuum debinding and sintering in air. The successful fabrication of 8YSZ monoliths with design flexibility via 3D printing provides a simple method for preparing functional ceramic components and may expand the application of 3D printing technology to the energy field.
研究领域:
材料科学
·
增材制造
·
陶瓷
·
能源材料
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2023
·
IF 8.4
Xu Li,Chunfeng Wang,Yuantian Zheng,Zefeng Huang,Jiangcheng Luo,Mingju Zhu,Tianlong Liang,Biyun Ren,Xianhui Zhang,Dong Wang,Zhanbing Ren,Sicen Qu,Wei Zheng,Xiaoyan Wei,Dengfeng Peng
Mechanoluminescence (ML) materials, which directly convert mechanical energy into light emission, have emerged as an emerging class of light-emitting materials with various applications. Although significant progress has been made in the development of new ML materials and devices, their practical application is limited by their low intensity and homogenously structured host structures. Thus, multiple-structured host ML materials with high ML intensity and reproducibility are needed, particularly for wearable and printable ML light sources with high brightness. In this study, various Mn-doped ternary heterojunction ML materials, CaZnOS-ZnS-SrZnOS, are synthesised by high-temperature solid-phase reactions, and their luminescence properties are systematically tested. The result indicates that the ternary heterojunction materials have a higher ML intensity over 60 times stronger than the state-of-art SrZnOS: Mn 2+ , which is currently the brightest sample we have obtained. ML linearly depends on the magnitude of the applied force. Based on the synthesised ternary ML heterojunctions, repetitive self-driving luminescence of the zipper is achieved for the first time through powder modification and inlay; the clothes composed of our prepared zippers are pulled and bent when worn on the body to emit bright visible light. Additionally, a Velcro that can achieve light emission is developed; it provides a new idea for the development of wearable flexible self-luminous devices in the future. Simultaneously, movement-driven stress luminous printable objects that can be printed on the surface of various commodities or their packaging are demonstrated. The preparation of self-driven, battery-free, and electrode-free stress luminescence wearable low light sources has an important application trend, which can avoid the interference of the circuit and improve the stability of the devices, thus promising a wide range of applications in smart wear, energy-saving displays, safety and rescue, robotic skin, and information security.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yongqi Yang,Jiaqi Li,Xinyao Li,Lin Guan,Zijian Gao,Lijie Duan,Fei Jia,Guanghui Gao
Paper, for writing and printing, is consumed a lot in modern life. However, the production of conventional paper could cause many problems, such as deforestation and environmental pollution. Therefore, it is necessary and urgent to explore novel strategies to solve these problems. In this work, a polyoxometalate-doped gelatin film with high strength, excellent transparency, and fast photochromic properties is designed and prepared. The film can display different colors by using a variety of reagents, exhibiting its potential application as a paper medium. Its rapid photochromic properties allow complex high-resolution images to be displayed by UV light printing. It is found that the mechanical and photochromic properties could be regulated by the introduction of triethylene glycol, and the fading process could be controlled by changing the temperature and humidity. Moreover, it is rewritable, self-repairable, and recyclable, and can also achieve long-term preservation without fading. It is envisioned that the environmentally friendly films with low cost, ease of preparation, and recycling advantages have the potential to be an alternative to conventional paper for writing and printing.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Nano
·
2020
·
IF 14.588
Tengyang Ye,Fei Xiu,Shuai Cheng,Chaoyi Ban,Zhihui Tian,Yingying Chen,Yamei Ding,Ziwei Zhen,Juqing Liu,Wei Huang
Realizing multiple functions and sustainable manufacturing within the same electronic device would be highly attractive from a design and fabrication perspective. Here we demonstrate a recyclable dual-mode thin-film device that can perform both light emission and heat management simultaneously. The device is composed of a dissolvable emitting layer sandwiched between two undissolvable conducting films. The vertical multilayered device enables a highly flexible and foldable multicolor electroluminescent emission ranging from yellow or blue to white, and the coplanar monolayered conductor achieves tunable Joule heat temperature setting. By utilizing selective dissolution and artificial reconstruction of each layered component, the parent device shows full recyclability and reconstructability without severe performance degradation after several recycles. The proof-of concept device provides an ideal strategy to construct a multifunctional film system with recyclability and makes a significant contribution to scientific and technological advancement in low-cost sustainable electronics and optoelectronics.
研究领域:
材料科学
·
电子工程
·
可持续技术
✓ 已验证
DOI
高影响因子
Catalysts
·
2021
·Vol. 11
·期 11
·1414
·
IF 4.146
Yekun Ji,Ye Zhou,Jinnan Wang,Aimin Li,Weilin Bian,Philippe François-Xavier Corvini
A visible-light-Fenton-like reaction system was constructed for the selective conversion of peroxymonosulfate to sulfate radical. Au@CoS, when doped on monoclinic BiVO4{010} facets, promoted spatial charge separation due to the different energy band between the m-BiVO4{010} and {110} facets. The visible-light response of m-BiVO4was enhanced, which was attributed to the SPR effect of Au. And the photogenerated electrons were transferred from the m-BiVO4{010} facet to Au via a Schottky junction. Owing to higher work function, CoS was able to capture these photoelectrons with acceleration of the Co(Ⅱ)/Co(Ⅲ) redox, enhancing peroxymonosulfate conversion to sulfate radical (Co2++ HSO5−→ Co3++ •SO4−+ OH−). On the other hand, holes accumulated on m-BiVO4{110} facets also contributed to organics oxidation. Thus, more than 95% of RhB was degraded within 40 min, and, even after five cycles, over 80% of RhB could be removed. The radical trapping experiments and EPR confirmed that both the sulfate radical and photogenerated hole were the main species for organics degradation. UV-vis DRS, photoluminescence (PL) and photoelectrochemical analyses also confirmed the enhancement of the visible-light response and charge separation. In a pilot scale experiment (PMS = 3 mM, initial TOC = 151 mg/L, reaction time = 4 h), CoS-Au-BiVO4loaded on glass fiber showed a high mineralization rate (>60%) of practical wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Tiantian Fang,Xifan Chen,Changyu Yang,Yaqi Cao,Junshi Zhang,WenChao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
Smart hydrogels with good flexibility and biocompatibility have been widely used. The common near-infrared (NIR) photothermal agents are facing a trade-off between good photothermal-conversion efficiency and high biocompatibility. Therefore, developing new metal-free photothermal agents with low cost, high biocompatibility and excellent phase stability is still in urgent need. In this study, we successfully combined poly( N -isopropylacrylamide) (PNIPAM) with the two-dimensional (2D) silicene nanosheets via the in situ polymerization method. Attributed to the thermal-responsive nature of PNIPAM and the excellent photothermal properties of 2D silicene, the obtained silicene/PNIPAM composite hydrogels exhibited dual thermal and NIR responsive properties. This smart hydrogel showed rapid, reversible and repeatable NIR light-responsive behaviors. The volume of this smart hydrogels can shrink significantly under NIR irradiation and recover to its original size without the NIR irradiation. Remote near-infrared light-controlled microfluidic pipelines and electronic switches based on obtained silicene/PNIPAM composite hydrogels were also demonstrated. This work significantly broadens the application prospects of silicene-based hydrogels in remote light-controlled devices.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）