Materials
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2023
·Vol. 16
·期 10
·3879
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IF 3.4
Yelin Dai,Ziyi Feng,Kang Zhong,Jianfeng Tian,Guanyu Wu,Qing Liu,Zhaolong Wang,Yingjie Hua,Jinyuan Liu,Hui Xu,Xingwang Zhu
Water pollution is a significant social issue that endangers human health. The technology for the photocatalytic degradation of organic pollutants in water can directly utilize solar energy and has a promising future. A novel Co3O4/g-C3N4type-II heterojunction material was prepared by hydrothermal and calcination strategies and used for the economical photocatalytic degradation of rhodamine B (RhB) in water. Benefitting the development of type-II heterojunction structure, the separation and transfer of photogenerated electrons and holes in 5% Co3O4/g-C3N4photocatalyst was accelerated, leading to a degradation rate 5.8 times higher than that of pure g-C3N4. The radical capturing experiments and ESR spectra indicated that the main active species are •O2−and h+. This work will provide possible routes for exploring catalysts with potential for photocatalytic applications.Keywords:photocatalyst;type-II heterojunction;carrier separation;photodegradation
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
ACS Nano
·
2022
·
IF 18.027
Nuoya Li,Xujian Chen,Jin Wang,Xinmeng Liang,Lintao Ma,Xiaolang Jing,De-Li Chen,Zhengquan Li
Utilizing sunlight to convert CO2 into chemical fuels could simultaneously address the greenhouse effect and fossil fuel crisis. ZnSe nanocrystals are promising candidates for photocatalysis because of their low toxicity and excellent photoelectric properties. However, pristine ZnSe generally has low catalytic activities due to serious charge recombination and the lack of efficient catalytic sites for CO2 reduction. Herein, a ZnSe nanorods–CsSnCl3 perovskite (ZnSe–CsSnCl3) type II heterojunction composite is designed and prepared for photocatalytic CO2 reduction. The ZnSe–CsSnCl3 type II heterojunction composite exhibits enhanced photocatalytic activity for CO2 reduction with respect to pristine ZnSe nanorods. The experimental characterizations and theoretical calculations reveal that the efficient charge separation and lowered free energy of CO2 reduction facilitate the CO2 conversion on the ZnSe–CsSnCl3 heterojunction composite. This work presents a type II heterojunction composite photocatalyst based on ecofriendly metal chalcogenides and metal halide perovskites. Our study has also promoted the understanding of the CO2 reduction mechanisms on perovskite nanocrystals, which could be valuable for the development of metal halide perovskite photocatalysts.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Ziyu Li,Jiqiao Zhang,Mei Li,Meijuan Ding,Zhenkun Liu,Zhiliang Jin
Cost-effective bimetallic oxide catalysts are gradually replacing noble metal catalysts for photocatalytic hydrogen production . This study used a two-step method to synthesize CoMoO 4 with a rod-shaped structurea. CuBr is a catalytic base synthesis graphdiyne material. The graphdiyne that serves to anchor CoMoO 4 rods through a solvent-thermal synthesis method, thereby enhancing the photocatalytic performance of the resultant composite catalyst. The results show that the 5 h hydrogen evolution capacity of the optimized CoMoO 4 /graphdiyne composite catalyst is 187.47 μmol, which is 2.9 times higher than that of CoMoO 4 monomer and 41.7 times higher than that of graphdiyne monomer. The addition of graphdiyne provides a larger comparison area for CoMoO 4 , giving composite catalyst more active sites, and enhancing the optical hydrogenation effect of catalysts. Through the Mott-Schottky test, the UV–visible diffuse reflectance test and band gap calculation can be speculated that the CoMoO 4 and graphdiyne construct the type II heterojunction which promotes the rapid transfer of photogonic carriers. This work provides a good prospect and opportunity for studying graphdiyne in the application of graphdiyne in the application of dualmetal oxides.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Fanying Meng,Yingying Qin,Jian Lu,Xinyu Lin,Minjia Meng,Gang Sun,Yongsheng Yan
In the practical process of photocatalytic H 2 evolution, optimizing the ability of light absorption and charge spatial separation is the top priority for improving the photocatalytic performance. In this study, we elaborately engineer neoteric g-C 3 N 4 nanotube@polydopamine(pDA)/NiCo-LDH (LPC) composite photocatalyst by combining hydrothermal and calcination method. In the LPC composite system, the one-dimensional (1D) g-C 3 N 4 nanotubes with larger specific surface area can afford more active sites and conduce to shorten the charge migration distance, as well as the high-speed mass transfer in the nanotube can accelerate the reaction course. The g-C 3 N 4 /NiCo-LDH type-II heterojunction can efficaciously stimulate the spatial separation of photo-produced charge. In addition, pDA as heterojunction metal-free interface mediums can provide multiple action (π-π* electron delocalization effect, adhesive action and photosensitization). The optimized LPC nanocomposite displays about 3.3-fold high photoactivity for H 2 evolution compared with the g-C 3 N 4 nanotube under solar light irradiation. In addition, the cycle experiment result shows that the LPC composite photocatalyst possesses superior stability and recyclability. The resultant g-C 3 N 4 @pDA/NiCo-LDH composite photocatalyst displays the potential practical application in the field of energy conversion.
研究领域:
材料科学
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能源化学
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光催化
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产品关联
DOI
PubMed
高影响因子
Materials Today Communications
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2025
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IF 4.5
Jianhang Yuan,Qinglan Chen,Yongqiang Wang,Shaomin Zhou,Shiyun Lou
The construction of photocatalysts with high sunlight absorption capacity and fast photogenerated carrier separation is essential for environmental remediation and solar energy conversion. However, metal oxides, such as TiO 2 , still suffer from the severe recombination of photogenerated charge carriers and the low consumption of sunlight. The type-II heterojunction hollow structure decorated with dual co-catalysts were proposed to simultaneously address the issues in charge separation and sunlight absorption. Herein, bifunctional cocatalysts, Au and MnO x , are spatially separated anchored on the inner and outer surfaces of TiO 2 @WO 3 heterogeneous hollow nanospheres. The spatially separated dual cocatalysts promoted the separation of photogenerated charge carriers by steering the photogenerated electrons and holes in opposite directions. Additionally, the surface plasmon resonance absorption of co-catalysts Au nanoparticles (450-600 nm) and light absorption of WO 3 (<450 nm), and scattering in hollow nanospheres synergistically improve the absorption of sunlight. As a result, the as-prepared TiO 2 @WO 3 hollow sphere decorated with Au and MnO x exhibits an exceptional photocatalytic degradation of phenol compared with pure TiO 2 @WO 3 hollow sphere or TiO 2 @WO 3 hollow sphere decorated with single cocatalyst Au or MnO x . This work fully demonstrates that the designed type-II heterogeneous structures with the spatially separated cocatalysts are a promising solution for enhancing photocatalysis performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Juanjuan Yang,Jiaming Song,Xin Zhao,Linghao Zong,Shuxian Wang,Bingda Li,Yuting Li,Guoshuai Ban,Zhuo Wang,Zijuan Ma,Peng Hu,Feng Teng
Transition metal thiophosphates (MTPs) are a group of emerging van der Waals materials with widely tunable band gaps. In the MTP family, CdPSe3 is demonstrated to possess a wide energy band gap and high carrier mobility, making it a potential candidate in optoelectronic applications. Here, we reported photoelectric response behaviors of both CdPSe3- and CdPSe3/MoS2-based photodetectors (noted as CPS and CM, respectively); these showed prominent photoelectric performances, and the latter proved to be significantly superior to the former. These devices exhibited ultralow dark current at a magnitude order of 10–12 A and fine cycle and air stabilities. Compared with CPS, CM demonstrated the highest responsivity (91.12 mA/W) and detectivity (1.74 × 1011 Jones) at 5 V under 425 nm light illumination. Besides, CM showed self-powered photoelectric responses at zero bias, which was attributed to the improved separation efficiency of photogenerated carriers by the built-in electric field at the interface of the p–n junction. This work proves a prospect for the CM device in portable, self-powered optoelectronic device applications.
研究领域:
材料科学
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光电技术
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纳米技术
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DOI
高影响因子
ACS Applied Polymer Materials
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2025
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IF 4.7
Weihua Zhang,Changwen Zhao,Wantai Yang
High efficiently conducting Norrish II type UV-induced graft polymerization on fully aromatic liquid crystal polymers (LCPs) is still a great change due to its lack of sp3 hybridized C–H bonds. Here, a facile strategy for photograft modification of LCP film surfaces was developed. First, the LCP surface was modified by the UV-assisted aminolysis reaction to introduce H atoms that can be effectively abstracted by Norrish II type photosensitizers. Then, photograft polymerization of acrylic acid or styrene/maleic anhydride on the surface of modified LCP was achieved under UV irradiation by using benzophenone (BP) as a photosensitizer. The water contact angle of LCP decreased from 86° to 40° after being photografted with poly(acrylic acid) (PAA). The highest grafting density reached 7.78 × 10–2 mg/cm2, which is much higher than the unmodified LCP directly photografted with PAA (2.57 × 10–3 mg/cm2). The strategy showed excellent spatial controllability in preparation of the regionally modified LCP surface. Patterned polymer brushes of PAA and styrene-maleic anhydride copolymer could be introduced onto the surface of the LCP film with the help of a photomask, which were further used to selectively deposit a silver pattern by electroless plating and immobilize protein, respectively. The PAA-modified LCP deposited with the copper layer exhibited improved adhesive property with copper foil and had a peeling strength of 12.3 N/cm, which was much higher than the peeling strength of blank LCP (0.7 N/cm). This success of the two-step UV-induced graft surface modification of LCP has promising applications in the fields of high-speed electronic communication, biomedical materials, composite materials, and other fields.
研究领域:
材料科学
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高分子化学
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生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Qi Wang,Lanlan Zhang,Yuhong He,Zonghan Hu,Yangfang Liao,Qingping Dai,Bing Lv,Wenzhong Wang
Rational design and construction of semiconductor heterojunction photoelectrode can effectively improve photoelectrochemical (PEC) water splitting for hydrogen evolution . In this study, for the first time, a novel n-type Fe 2 V 4 O 13 (FVO) nanoparticle-modified p-type CuInS 2 (CIS) nanosheet arrays (NSAs) photocathode is designed and constructed for hydrogen evolution through PEC cell . The CIS/FVO NSAs photocathode simultaneously with type II heterojunction and p-n junction was constructed by growing FVO nanoparticles (NPs) on CIS NSAs through a facile successive ionic layer adsorption and reaction (SILAR) as well as annealing method. The designed and constructed CIS/FVO NSAs photocathode exhibited drastically improved PEC water splitting for hydrogen evolution and generated a photocurrent of −4.8 mA/cm 2 , 9.5 times that of pristine CIS NSAs photocathode at −1.0 V vs. Ag/AgCl. UV–vis absorption spectrum tests demonstrated the outstanding light absorption of CIS/FVO NSAs within the wavelength of 300–800 nm. Electrochemical impedance and photoluminescence measurements evidenced the effective separation of the carriers within the CIS/FVO NSAs. Mott-Schottky tests confirmed the establishment of type II heterojunction between the interface of p-type CIS and n-type FVO. The experimental tests revealed that the enhanced PEC water splitting performance of the CIS/FVO NSAs photocathode is attributed to the outstanding light absorption and the effective charge carrier separation achieved by type II heterojunction and p-n junction. This work provides a new strategy to design and construct CIS-based photocathode for highly efficient PEC water splitting hydrogen evolution.
研究领域:
材料科学
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能源科学
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Xiao Liu,Yanjun Zhang,Wuxia Zhang,Gang Cheng,Fan Tian,Wei Li,Jinyan Xiong
Rapid charge recombination, limited light response, and slow surface reactions were observed in the photocatalysts, thereby limiting their future-oriented applications in photocatalytic hydrogen production through water splitting. Constructing a multi-channel charge separation photocatalysis system could solve those questions. In this study, Pd-TiO 2 -Cu 2 O composites were successfully accomplished via a facile chemical reduction method. The Pd-TiO 2 -Cu 2 O composite exhibited improved photocatalytic hydrogen production (13069.7 μmol g −1 h −1 ), which was over 6 times as much as that of pure TiO 2 . Based on the photo/electrochemical measurements, it was proposed that a Type II heterojunction was formed at the TiO 2 -Cu 2 O interface under light irradiation, and concurrently, a Schottky barrier was established between Pd and TiO 2 . Accordingly, the Type II heterojunction-created built-in electric field would facilitate the separation of photogenerated charges. Simultaneously, the introduction of Pd accelerates the accumulation of electrons and further enhances the charge transfer rate. The combination of such a Type II heterojunction and Schottky junction synergistically created a multi-channel charge separation system, optimizing surface reactions and thus improving photocatalytic efficiency. This work provided a rational approach for building efficient multi-component photocatalysis systems featuring Type II heterojunction/Schottky junction for photocatalytic hydrogen evolution.
研究领域:
材料科学
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能源化学
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光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULAR SIGNALLING
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2025
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IF 3.7
Yuyan Sun,Ziyu Luo,Haiqi Zhou,Sha Wu,Hongwei Shen,Yuanyuan Fu,Thai Namanh Ngo,Wen Wang,Yuanrong Wang,Ying Kong
Chondrocyte mechanotransduction dysfunction is a key feature of osteoarthritis (OA). Previous studies have demonstrated that primary cilia play a crucial role in chondrocyte mechanosensation and signal transduction. Transient Receptor Potential Vanilloid 4(TRPV4), which is highly expressed on primary cilia, is a critical mechanotransduction protein and one of the most important Ca 2+ channels. However, the interplay between the mechanism of primary cilia-mediated signaling and that of TRPV4 channel regulation remains poorly understood. Here, we demonstrate that OA chondrocytes and Intraflagellar Transport Protein 88(Ift88) conditional knockout (cKO) mice exhibit reduced ciliary incidence. This results in cartilage degeneration. TRPV4 expression inversely correlated with ciliary integrity, increasing as cilia were lost. In cilia-intact healthy chondrocytes, TRPV4 antagonism inhibited Ca 2+ -dependent NF-κB activation while promoting type II collagen(COL2) synthesis. These effects were abolished by Interleukin-1 beta(IL-1β)-induced ciliary defect or IFT88 deficiency. Chromatin immunoprecipitation(ChIP) analysis revealed disrupted p65 binding to the COL2 promoter upon the loss of ciliary integrity. Crucially, Ift88 cKO chondrocytes showed unresponsive of the TRPV4 channel, as confirmed by Ca 2+ flux and changes in the expression levels of NF-κB and COL2. Our findings position primary cilia as indispensable regulators of TRPV4-mediated NF-κB - COL2 signaling, offering mechanistic insights into OA pathogenesis and identifying IFT88 as a therapeutic checkpoint.
研究领域:
分子生物学
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细胞生物学
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骨关节炎病理学
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信号转导
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转化医学
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软骨生物学
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机械生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
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IF 9.965
Feifei You,Yunan Zhou,Danyang Li,Hao Zhang,Dawei Gao,Xiaohong Ma,Rui Hao,Juzhe Liu
Photoreduction of CO 2 to value-added chemicals and fuels is an attractive solution to alleviate environmental problems and energy crisis at the same time. However, engineering efficient photocatalysts with high activity and product selectivity is still challenging. Herein, we achieved three-dimensional (3D) spatial configuration design at micro-scale and heterogeneous interface construction at nano-scale on a SnS 2 /SnO 2 composite, which featured hierarchical flower-like morphology consisted of nanosheets and type-II semiconductor structure . It behaved excellent selectivity and impressive photocatalytic CO 2 -to-CO performance with a yielding rate of 60.85 μmol g -1 h −1 , roughly 3 times higher than that of SnS 2 and was in the front rank of this kind catalysts under 300 W Xe lamp illumination without using any sensitizers or noble metals . The enhanced catalytic capability could be attributed to the elaborately built structure with suitable energetic position that afforded effective separation and migration of photo-generated electron/hole pairs as well as enhanced light caption and absorption. Meanwhile, main reactive intermediates (e.g., CO 2 – and *COOH) were captured by in-situ Fourier transform infrared spectroscopy (FTIR), suggesting a fluent catalytic pathway on the SnS 2 /SnO 2 platform. This work provides a new scheme to build advanced catalysts based on multiscale design and rational phase assembling.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Yuzhen Li,Zhaoxin Sun,Sufang Wang,Runbin Duan,Shaojie Wang,Shuo Li,Borong Lan,Lizhen Gao
Herein, the ternary CdS/Zn 2 In 2 S 5 /g-C 3 N 4 (CdS/ZIS/CN) heterojunction photocatalyst was successfully prepared via a one-pot method for photodegradation of tetracycline (TC) under visible light irradiation. The surface morphology, structure and optical properties of the prepared photocatalytic material were analyzed by XRD , SEM , TEM, UV–vis DRS, FT-IR and PL . Moreover, the experimental results exhibited that the ternary CdS/ZIS/CN photocatalyst revealed excellent photocatalytic activity compared with g-C 3 N 4 . In this work, 94.73% of TC (20 mg/L, pH=11) was degraded by 0.5 g/L 30CdS/ZIS/CN within 60 min of visible light irradiation. Additionally, the degradation rate of the photocatalyst decreased by about 9.41% after the fourth cycle, indicating its high stability and reusability. Subsequently, a possible double type-II mechanism of photodegradation was eventually provided based on active radical capture experiments. The current investigation provided a promising strategy to construct the high-efficiency heterojunction photocatalyst to degrade antibiotic contaminants.
研究领域:
环境科学
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材料科学
✓ 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）