CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2024
·Vol. 40
·期 3
·484-489
·
IF 3.1
Xiao Qi,Liu Ting,Zhou Qianhe,Li Liangyu,Chang Chuntao,Gao Dawei,Li Danyang,You Feifei
Photocatalytic CO 2 reduction driven by solar light is a green approach that can decrease the greenhouse effect induced by high CO 2 concentration in the atmosphere and generate carbon-based chemicals/fuels as well. In this paper, non-metal co-catalysts ZnO/ZnS type-II hetero-junction nanoparticles with a rough surface were prepared through a hydrothermal process. When used as a photocatalyst for CO 2 reduction, the optimal one showed good cycle stability and a higher yield rate of 27.8 µmol·g −1 ·h −1 for CO 2 conversion into CO. The outstanding catalytic activity originated from i) the rich interfaces between ZnO and ZnS in the nanoscale could significantly reduce the delivery path of carriers and improve the utilization efficiency of photo-excited electron/hole pairs and ii) enriched surface oxygen defects could supply much more reaction active sites for CO 2 adsorption.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
催化
·
可再生能源
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Luping Feng,Enjun Chen,Jianghong Wang,Xinfeng Li,Yujie Fan,Leyao Jin,Peisong Tang,Lixiang Zhang
A simulated sunlight-driven photoelectrochemical (PEC) sensor has been developed for quantitative analysis of hydrogen sulfide (H 2 S) with “signal-on” output by Hg 2+ -integrated ZnS nanocubes (Hg 2+ @ZnS NCs). Herein, hollow ZnS NCs were firstly prepared by the ZIF-8-derived soft-template method. Subsequently, Hg 2+ probing ions were doped into the porous structures of these ZnS NCs through an adsorption reaction, yielding Hg 2+ @ZnS NCs. It was observed that Hg 2+ @ZnS-based PEC sensor could exhibit slightly enhanced PEC responses over pristine ZnS, attributed to the adsorption of Hg 2+ on ZnS surface, which may modulate surface states/defects and band structures to suppress surface recombination. More importantly, after the addition of H 2 S, the in-situ growth of HgS@ZnS with a type-II heterojunction enables enhanced photocurrent response in developed sensor by promoting efficient spatial charge separation and transfer. A PEC sensing platform with exceptional sensitivity and selectivity has been established for H 2 S quantification, covering a linear range of 0.05–10 nM and a detection limit of 32 pM, which may serve as a guideline for the design of PEC sensors for real-world H 2 S analysis in complex matrices like environmental wastewater and industrial waste gas.
研究领域:
分析化学
·
纳米技术
·
环境监测
·
光电化学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yuan Wang,Jinfang Liu,Like Mao,Fang Yuan,Yanxiang Gao
In this study, the structural design and physicochemical property enhancement of undenatured type II collagen (UC-II) nanofibrils with sodium alginate (SA) coating induced by calcium ions (Ca 2+ ) were investigated. The research aimed to elucidate the impact of Ca 2+ concentration on the morphology, thermal stability , and digestive resistance, as well as to assess the potential of UC-II/SA nanofibrils as a delivery system for curcumin (Cur). A series of Ca 2+ concentrations (1–9 mM) were methodically applied to optimize the condition that maintains the triple-helical structure of UC-II, thereby enhancing its functional properties. It was found that the Ca 2+ level up to 5 mM effectively preserved the structural integrity and improved thermal stability of UC-II, with the added benefit of ensuring the substantial delivery of active fragment to small intestine (70.7 %), which was 3.43 times greater than that of uncoated UC-II. Moreover, incorporating Cur into the UC-II/SA nanofibrils resulted in a 300 times increase in Cur solubility and showcased the superior dispersion stability, antioxidant activity , and sustained release profile during simulated digestion. These findings underscored the dual functionality of the UC-II/SA system as both a stabilizing agent for UC-II nanofibrils and an efficient carrier for Cur delivery.
研究领域:
材料科学
·
药学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chun Sun,Yiwei Zhao,Yelin Ding,Fuhao Zhang,Zhihui Deng,Kai Lian,Zhengtong Wang,Jiazhi Cui,Wengang Bi
A novel TiO2–CsPbBr3(Q) photocatalyst is proposed and rationally constructed, where CsPbBr3 perovskite quantum dots (QDs) of various sizes inside mesopore TiO2 (M-TiO2) are integrated. These perovskite QDs, generated in situ within M-TiO2, establish a type-II homojunction. Interestingly, a Z-scheme heterojunction is simultaneously formed at the interface between CsPbBr3 and TiO2. Due to the coexistence of the type-II homojunction and the Z-scheme heterojunction, photogenerated electrons are effectively transferred from TiO2 to CsPbBr3, thereby suppressing carrier recombination and thus enhancing the degradation of rhodamine B (RhB). Compared with pure CsPbBr3 and TiO2, TiO2–CsPbBr3(Q) shows significantly enhanced photocatalytic performance for RhB degradation. The degradation efficiency of RhB in the presence of the TiO2–CsPbBr3(Q) attains 97.7% in 5 min under light illumination, representing the highest efficiency observed among photocatalysts based on TiO2. This study will facilitate the development of superior semiconductor catalysts for photocatalytic applications.
研究领域:
材料科学
·
光催化
·
纳米技术
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 13
·8079-8090
·
IF 4.22
Liu Jiali,Yang Qiang,Liu Jikai,Luo He’an
Tungsten trioxide (WO 3 ) has been conceived as a promising photoanode material for photoelectrochemical (PEC) water oxidation. Therefore, many efforts have been made to improve its PEC performances. Herein, a novel heterojunction is fabricated through combining rocksalt CoO (R-CoO) or blende CoO (B-CoO) nanosheets with WO 3 nanoplates using a spin-coating method. The typical type II heterojunctions, e.g., WO 3 /R-CoO and WO 3 /B-CoO, both have exhibited higher photocurrent densities than pristine WO 3 photoanode. The photocurrent densities of WO 3 /R-CoO, WO 3 /B-CoO and WO 3 are 0.53 mA cm −2 , 0.45 mA cm −2 and 0.31 mA cm −2 at 1.23 V vs. reversible hydrogen electrode, respectively. For the WO 3 /R-CoO photoanode, the surface charge separation efficiency is 50.95% and the photoconversion efficiency is 0.062%, which are both higher than the WO 3 and WO 3 /B-CoO photoanodes. The enhanced PEC performances are due to the type II heterojunction between WO 3 and R-CoO (or B-CoO), which facilitates the absorption of visible light and charge transport. The better performance of WO 3 /R-CoO than that of WO 3 /B-CoO may be due to the deeper valence band position of R-CoO. Our work demonstrates that R-CoO (or B-CoO) can couple with WO 3 to form a type II heterojunction to improve the PEC water oxidation performance.
研究领域:
材料科学
·
光电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Sijia Wu,Hong-Juan Zhao,Chao-Fan Li,Jing Liu,Wenda Dong,Heng Zhao,Chao Wang,Yang Liu,Zhi-Yi Hu,Lihua Chen,Yu Li,Bao-Lian Su
Graphitic carbon nitride (g-C 3 N 4 ) is a visible light active semiconductor. However, low conductivity and high recombination rate of photogenerated electrons and holes limit its application in photocatalysis. In this work, we design and synthesize hierarchically porous zinc oxide/graphitic carbon nitride (ZnO/g-C 3 N 4 ) microspheres with type-II heterojunction to effectively degrade rhodamine B (RhB) via increasing the charge-separation efficiency. The ultraviolet-visible (UV–Vis) absorption spectra, Mott-Schottky plots and valence band X-ray photoelectron spectroscope confirm the formation of type-II heterojunction between ZnO nanocrystals and g-C 3 N 4 nanosheets. As a result, the 1.5-ZnO/g-C 3 N 4 composite (the mass ratio of zinc acetate dihydrate to g-C 3 N 4 is 1.5) exhibits the highest photocatalytic activity with good stability and higher photocatalytic degradation rate comparing to pure g-C 3 N 4 and pure ZnO. In addition, our results confirm that O 2 − and h + are the main active species for ZnO/g-C 3 N 4 in degradation of RhB.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CYTOTECHNOLOGY
·
2021
·Vol. 73
·期 5
·715-726
·
IF 2.058
Xu Haiqiao,Lin Shibang,Huang Haizhou
CCL22, which could induce chondrocyte apoptosis, was identified to be overexpressed in damaged cartilage. This study was conducted with the aim of investigating the effects of CCL22 interference on chondrocyte injury. The osteoarthritis model was established by stimulating chondrocytes with LPS. The expressions of CCL22, CCR4, matrix metallopeptidase (MMP) 3, MMP9, MMP13, (a disintegrin and metalloproteinase with thrombospondin-like motifs) ADAMTS-4, collagen II and inflammatory cytokines were measured using quantitative reverse transcription PCR (RT-qPCR) and western blot. Besides, immunoprecipitation (IP) was employed to verify the binding of CCL22 and CCR4. After CCR4 was overexpressed, cell viability was observed using Cell Counting Kit-8 (CCK-8). Additionally, cell apoptosis as well as its related proteins was detected by TUNEL and western blot, respectively. ng What’s more, glycosaminoglycan (GAG) level was detected using GAG kits. CCL22 and CCR4 expression increased noticeably in LPS-stimulated ATDC5 chondrocytes. CCL22 inhibition could suppress the expression of CCR4 in LPS-induced ATDC5 cells. Likewise, CCL22 inhibition could revive the activation of LPS-induced ATDC5 cells by regulating CCR4. In addition, CCL22 knockdown alleviated inflammatory response and cell apoptosis through CCR4. Furthermore, the cartilage degradation of ADTC5 cells could be relieved by CCL22 silence via regulating CCR4. CCL22/CCR4 expression was increased in osteoarthritic cartilage injury and participated in the inflammation and cartilage degradation of chondrocytes.
研究领域:
风湿病学
·
细胞生物学
·
分子生物学
·
免疫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2025
·
IF 5.1
Yingkai Liu,Lei Liu,Dafei Chen,Fan Mu,Yan Yang,Yifei Huang,Haiqiang Huang,Lujun Yang,Hui Zhang
Transition metal dichalcogenides have garnered growing attention in optoelectronic applications owing to their unique physicochemical properties and efficient carrier transport capabilities. However, their atomic-scale thickness severely limits light absorption efficiency. Herein, we fabricated a van der Waals stacked heterostructure conveniently and efficiently via transferring a CdS nanobelt onto a bilayer WSe2 nanosheet. Benefiting from the formation of a type-II band alignment between WSe2 and CdS, the CdS/WSe2 photodetector achieves a high responsivity of 643.9/1315.5 A/W and an outstanding specific detectivity of 2.89 × 1013/5.91 × 1013 Jones under weak 450 /520 nm light irradiation, respectively. Moreover, the p-n junction formed between p-type WSe2 and n-type CdS effectively suppresses dark current, leading to a 1591.5× (194.5×) enhancement in the on/off ratio compared to the pure CdS (pure WSe2 ) control devices. This work demonstrates the great potential of vdW stacked heterostructures for high-performance photodetectors and provides new insights into the development of advanced optoelectronic devices.
研究领域:
凝聚态物理
·
纳米光电子学
·
半导体器件
·
二维材料
·
光电探测技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2019
·Vol. 10
·期 1
·53
·
IF 4.034
Yuanyuan Li,Xiaofang Tian,Yaoqiong Wang,Qimei Yang,Yue Diao,Bin Zhang,Dingfeng Yang
Using solar energy to remove antibiotics from aqueous environments via photocatalysis is highly desirable. In this work, a novel type-II heterojunction photocatalyst, MgSn(OH)6/SnO2,was successfully prepared via a facile one-pot in situ hydrothermal method at 220 °C for 24 h. The obtained heterojunctions were characterized via powder X-ray diffraction, Fourier-transform infrared spectroscopy, transmission electron microscopy, and ultraviolet-visible diffuse reflectance spectroscopy. The photocatalytic performance was evaluated for photodegradation of tetracycline solution under ultraviolet irradiation. The initial concentration of tetracycline solution was set to be 20 mg/L. The prepared heterojunctions exhibited superior photocatalytic activity compared with the parent MgSn(OH)6and SnO2compounds. Among them, the obtained MgSn(OH)6/SnO2heterojunction with MgCl2·6H2O:SnCl4·5H2O = 4:5.2 (mmol) displayed the highest photocatalytic performance and the photodegradation efficiency conversion of 91% could be reached after 60 min under ultraviolet irradiation. The prepared heterojunction maintained its performance after four successive cycles of use. Active species trapping experiments demonstrated that holes were the dominant active species. Hydroxyl radicals and superoxide ions had minor effects on the photocatalytic oxidation of tetracycline. Photoelectrochemical measurements were used to investigate the photocatalytic mechanism. The enhancement of photocatalytic activity could be assigned to the formation of a type-II junction photocatalytic system, which was beneficial for efficient transfer and separation of photogenerated electrons and holes. This research provides an in situ growth strategy for the design of highly efficient photocatalysts for environmental restoration.
研究领域:
材料科学
·
环境催化
·
光催化
·
水处理
·
纳米材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Junfeng Yang,Jinsong Lu,Liangsheng Xie,Jingfeng Wu,Yu Wen,Qin Zhang
Herein, the SrTiO 3 -TiO 2 -CaTiO 3 /Cu 2 O quaternary composite has been designed and prepared via one-step hydrothermal process followed by a NaBH 4 reduction treatment. By comparing the H 2 production rate (HPR) of Sr-Ti-Ca/Cu samples prepared by different Cu sources, it is found that Sr-Ti-Ca/Cu has the best H 2 production performance when CuCl 2 is as Cu source. As expected, the highest HPR of Sr-Ti-Ca/Cu sample is up to 5.088 mmol g −1 h −1 , which is 195.7 times as higher as that of the Sr-Ti-Ca sample (0.026 mmol g −1 h −1 ) under the same conditions. Moreover, the HPR reached 0.692, 0.530 and 0.647 mmol g −1 h −1 in tap water, lake water and river water, indicating that the photocatalyst has high practicability in natural water sources. In addition, the experiment of the tap water composition effect on H 2 production performance shows that NO 3 − and SO 4 2− ions have great negative influence on the HPR. Compared with Sr-Ti-Ca, the light absorption of Sr-Ti-Ca/Cu extends over the entire visible region, the interface resistance decreases, and the photocurrent density increases. These results suggest that the well-designed dual p-n heterojunctions and dual type-II heterojunctions in Sr-Ti-Ca/Cu sample can enhance the light absorption in the ultraviolet region and realize the rapid separation and migration of photogenerated charge, thereby accelerating the production of H 2 . This work shows the strong advantage and potential of non-precious metal efficient photocatalyst system for producing H 2 from deionized water and natural fresh water.
研究领域:
材料科学
·
化学
·
环境科学
·
能源
✓ 已验证
产品关联
DOI
高影响因子
Acta Pharmaceutica Sinica B
·
2025
·
IF 14.6
Wenxiang Hong,Hongbo Ma,Zhaoxu Yang,Jiaying Wang,Bowen Peng,Longling Wang,Yiwen Du,Lijun Yang,Lijiang Zhang,Zhibin Li,Han Huang,Difeng Zhu,Bo Yang,Qiaojun He,Jiajia Wang,Qinjie Weng
Dendritic cells (DCs) serve as the primary antigen-presenting cells in autoimmune diseases, like rheumatoid arthritis (RA), and exhibit distinct signaling profiles due to antigenic diversity. Type II collagen (CII) has been recognized as an RA-specific antigen; however, little is known about CII-stimulated DCs, limiting the development of RA-specific therapeutic interventions. In this study, we show that CII-stimulated DCs display a preferential gene expression profile associated with migration, offering a new perspective for targeting DC migration in RA treatment. Then, saikosaponin D (SSD) was identified as a compound capable of blocking CII-induced DC migration and effectively ameliorating arthritis. Optineurin (OPTN) is further revealed as a potential SSD target, with Optn deletion impairing CII-pulsed DC migration without affecting maturation. Function analyses uncover that OPTN prevents the proteasomal transport and ubiquitin-dependent degradation of C–C chemokine receptor 7 (CCR7), a pivotal chemokine receptor in DC migration. Optn -deficient DCs exhibit reduced CCR7 expression, leading to slower migration in CII-surrounded environment, thus alleviating arthritis progression. Our findings underscore the significance of antigen-specific DC activation in RA and suggest OPTN is a crucial regulator of CII-specific DC migration. OPTN emerges as a promising drug target for RA, potentially offering significant value for the therapeutic management of RA.
研究领域:
免疫学
·
风湿病学
·
药理学
·
细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainable Materials and Technologies
·
2024
·
IF 8.6
Lei Guo,Yan-He Chen,Li-Mei Xu,Xiao-Lu Chen,Jin-Qiu Shen,Jian-Yong Zhang,Zhen-Jiang Liu
Herein, a fern-like p-n heterojunction by anchoring Ni 3 Fe-LDH nanoplates onto Co 3 O 4 nanoneedles have been optionally constructed. Essentially, p-n heterojunction ensured to induce strong built-in electric field, and inherit interfacial electron redistribution. Based on their compatible and well-matched electronic band structures, a staggered type-II photo-generated electron/holes transfer pathway have been elaborated by density functional theory calculation (DFT), in situ irradiation X-ray photoelectron spectroscopy (XPS), and fluorescent decay. This band bending and charge migrating module conferred the architecture with strong redox ability, sufficient exciton dissociation, and admirable optoelectronic characteristics. Moreover, the heterostructure acquired broad absorption spectrum to exhibit outperforming photocatalytic effect. Totally, this electron redistribution at the hierarchical interface, a type-II scheme charge-transfer pathway and the oxygen defects would lead to high efficiency in solar light assisted N 2 reduction. Typically, Co@Ni 3 Fe-2 catalyst exhibited the highest NH 3 production rate of 16.15 μg h −1 mg cat. −1 and Faraday efficiency (FE) of 31.57% at −0.6 V vs. RHE in 0.1 M Na 2 SO 4 solution. Fortunately, with light exposure, the NH 3 production rate and FE could increase by 27.9% and 18.1% than that under dark. This work would provide a plausible attitude towards the design of high efficient photocatalyst for artificial photosynthesis with multi-functionalized coupling effect.
研究领域:
材料科学
·
催化
·
光化学
·
理论化学
✓ 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）