ADVANCED MATERIALS
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2023
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IF 29.4
Ruofei Xing,Ziqing Li,Wenxiao Zhao,Dong Wang,Ranran Xie,Yanxue Chen,Limin Wu,Xiaosheng Fang
Metal halide perovskite films have gained significant attention because of their remarkable optoelectronic performances. However, their poor stability upon the severe environment appears to be one of the main facets that impedes their further commercial applications. Herein, a method to improve the stability of flexible photodetectors under water and humidity environment without encapsulation is reported. The devices are fabricated using the physical vapor deposition method (Pulse Laser Deposition & Thermal Evaporation) under high-vacuum conditions. An amorphous organic Rubrene film with low molecular polarity and high elastic modulus serves as both a protective layer and hole transport layer. After immersed in water for 6000 min, the photoluminescence intensity attenuation of films only decreased by a maximum of 10%. The demonstrator device, based on Rubrene/CsPbBr 3 /ZnO heterojunction confirms that the strategy not only enhances device moisture and mechanical stability but also achieves high sensitivity in optoelectronic detection. In self-powered mode, it has a fast response time of 79.4 µs /207.6 µs and a responsivity 124 mA W −1 . Additionally, the absence of encapsulation simplifies the fabrication of complex electrodes, making it suitable for various applications. This study highlights the potential use of amorphous organic films in improving the stability of perovskite-based flexible devices.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2016
·Vol. 18
·期 40
·27848-27857
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IF 4.449
Xiaofang Li,Changqian Wang,Bo Li,Yu Shao,Danzhen Li
Efficient light harvesting was observed over CdS photodeposited on In2O3 photonic crystals during the photocatalytic hydrogenation of 4-nitroaniline to p-phenylenediamine. The highest conversion of 4-nitroaniline and selectivity of p-phenylenediamine over the In2O3 photonic crystal supported CdS were ∼93% and ∼99%, respectively, which were better than that achieved for commercial hexagonal CdS. The existence of the photonic crystal structure was responsible for the higher efficiency of In2O3 photonic crystal supported CdS. The ordered structure facilitated the mass transport. The elaborate tuning of the photonic band gap activated the slow photon enhancement effect on the blue edge for intensifying the light harvesting efficiency of CdS. Moreover, CdS supported on In2O3 photonic crystals exhibited higher photocatalytic stability than that on the In2O3 nanocrystals. The mechanism of photocatalytic hydrogenation over In2O3 photonic crystal supported CdS was discussed. Our results provided guidance for efficiently utilizing light for photocatalysis by applying photonic crystals as support.
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ACS Omega
·
2021
·
IF 3.512
Jingwen Ba,Yandong Han,Xiaoyu Zhang,Lijuan Zhang,Shuhan Hui,Zhenzhen Huang,Wensheng Yang
In this work, we demonstrated a facile approach for fabrication of Au nanoflowers (Au NFs) using an amino-containing organosilane, 3-aminopropyltriethoxysilane (APTES), as a shape-directing agent. In this approach, the morphology of the Au particles evolved from sphere-like to flower-like with increasing the concentration of APTES, accompanied by a red shift in the localized surface plasmon resonance peak from 520 to 685 nm. It was identified that the addition of APTES is profitable to direct the preferential growth of the (111) plane of face-centered cubic gold and promote the formation of anisotropic Au NFs. The as-prepared Au NFs, with APTES on their surface, presented effective catalytic and surface-enhanced Raman scattering (SERS) performances, as evidenced by their applications in catalyzing the dimerization of p-aminothiophenol and monitoring the reaction process via in situ SERS analysis.
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RSC Advances
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2022
·Vol. 12
·期 8
·4836-4842
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IF 4.036
Yingxin Chen,Chunli Yang,Xiaotong Huang,Lu Li,Na Yu,Huan Xie,Zebin Zhu,Yong Yuan,Lihua Zhou
A composite of cuttlefish ink-based carbon quantum dots@Ag/MXene (CQD@Ag/MXene) was firstly synthesized by solvothermal method as a catalyst for reduction of p-nitrophenol (PNP) to p-aminophenol (PAP). CQD@Ag/MXene was characterized by scanning electron microscopy (SEM), field emission transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman. The results show that loading on 2D material MXene can prevent the aggregation of CQD@Ag and expose more active sites, which contributes to a superior catalytic activity with a pseudo-first-order rate constant k (2.28 × 10−2 s−1) and mass-normalized rate constant km (5700 s−1 g−1), nearly 2 times higher than CQD@Ag without MXene (k = 1.09 × 10−2 s−1 and km = 2725 s−1 g−1). Besides, CQD@Ag/MXene showed excellent reusability which even retained about 65% activity in successive 10 cycles. The high adsorption rate to PNP and the promotion of forming H radicals may be the reason for the outstanding catalytic activity of CQD@Ag/MXene. CQD@Ag/MXene can be a potential candidate in the removal of environmental pollutants due to its facile synthesis and high catalytic efficiency.
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LANGMUIR
·
2023
·
IF 3.9
Fang Chen,Li Yin,Teng He,Tao Chen,Hangbo Yue,Chufen Yang
To enhance the stability of the polymeric micelles and optimize their drug-controlled release ability, three disulfide-linked polyethylene glycol methyl ether methacrylate–disulfide–poly(ε-caprolactone-co-γ-amine−ε-caprolactone) (PPEGMA-SS-P(CL-co-ACL)) polymers were synthesized and characterized by 1H NMR, GPC, and FT-IR successfully, and their dual pH/reduction-responsive cross-linked polymeric micelles were prepared for paclitaxel (PTX) delivery by using 2,3-dimethylmaleic anhydride (DMMA) as the cross-linking agent. The PTX loading capacity (LC) and encapsulation efficiency (EE) values of the cross-linked micelles formed by PPEGMA8-SS-P(CL47-co-ACL15) achieved were 23.96% and 71.58%, slightly higher than those of un-cross-linked micelles. Both particle sizes of blank micelles and in vitro drug release of PTX-loaded micelles confirmed that compared with those un-cross-linked micelles, the cross-linked micelles were more stable at pH 7.4 + 0 mM DTT, with a PTX cumulative release of 13% at 120 h, while the PTX cumulative release of the cross-linked micelles at pH 5.0 + 10 mM DTT were close to that of un-cross-linked micelles after 60 h, indicating the successful reversible cross-linking and smooth drug release of the cross-linked micelles. The cytotoxicity assay showed that PPEGMA8-SS-P(CL47-co-ACL15) and its cross-linked micelles had low cell cytotoxicity, and both PTX-loaded micelles revealed a certain inhibitory effect on HepG2 cells. These results revealed that the dual pH/reduction-responsive cross-linked polymeric micelles prepared from PPEGMA8-SS-P(CL47-co-DCL15) were a promising candidate for PTX delivery.
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Surfaces and Interfaces
·
2023
·
IF 6.2
Jing Xu,Qian Li,Xinyu Liu,Qian Yang
S-type heterojunction is a new type of photocatalytic heterojunction that can efficiently enhance the performance of photocatalytic hydrogen-producing. In this paper, NiAl-LDH/P-MoO 3 composite catalysts were prepared, NiAl-LDH, P-MoO 3 and NiAl-LDH/P-MoO 3 were characterized, tested and analyzed from the aspects of morphology, structure and spectrum. The 5 h hydrogen-producing amount of NiAl-LDH/P-MoO 3 reaches 298.72 μmol, which is 160 times and 16 times that of MoO 3 and NiAl-LDH under the visible light , respectively. The doping of P narrows the band gap of MoO 3 and is more helpful to the electronic transmission. The irregular P-MoO 3 nanorods with a diameter of about 200 nm are attached to 3-4 μml NiAl-LDH nanoflower . The construction of S-type heterojunction changes the electronic transmission pathway of NiAl-LDH/P-MoO 3 while improving the electron-hole pair separation ratio of NiAl-LDH/P-MoO 3 . The strong oxidizing ability of P-MoO 3 and the strong reducing ability of NiAl-LDH are retained. Effective control of electronic transmission path improves the photocatalytic hydrogen-producing activity and stability of NiAl-LDH/P-MoO 3 , which provides a certain theoretical support for the realization of photocatalytic high-efficiency HER by constructing heterojunction.
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APPLIED CATALYSIS A-GENERAL
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2023
·
IF 5.5
Chengming Wu,Hongbo Chen,Jifan Li,Chun-Ling Liu,Wen-Sheng Dong
Efficient production of renewable p -xylene (PX) from bio-based 2,5-dimethylfuran (DMF) and ethylene is challenging. Herein, novel nanoflake-like zirconium-tin phosphate catalysts were synthesized, and their catalytic performance was evaluated in the conversion of DMF and ethylene to PX. The DMF conversion, PX selectivity and PX yield reached up to 99%, 95.2% and 94.2%, respectively over Zr 0.6 Sn 0.4 P under relatively mild conditions. The PX productivity was 61.1 mmol PX ·g cat −1 ·h −1 , which is better than that of previously reported catalysts. By combining characterization with activity test, it was found that enhanced DMF and ethylene adsorption is beneficial to promoting the reaction between DMF and ethylene. Precise regulation of acid sites is crucial for inhibiting the occurrence of side reactions and improving the selectivity of PX. The kinetic analysis revealed that Zr 0.6 Sn 0.4 P had a relatively low apparent activation energy (39 kJ·mol −1 ) for this reaction than previously reported catalysts. In addition, the Zr 0.6 Sn 0.4 P catalyst exhibited an excellent reusability.
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Materials Today Chemistry
·
2023
·
IF 7.3
Yibo Niu,Yu Wang,Linli He,Yujie Wang,Huizhen Ma,Nan Li,Danli Xie,Jianshan Ye,Ying Ma
Cathodic photoelectrochemical (PEC) bioanalysis has been attracting great interest due to its excellent anti-interference capability. As a p-type wide energy band gap semiconductor, CuI is regarded as an ideal material for the construction of photocathodes, while its poor stability and narrow light absorption range limit its application as a photoelectrode in PEC sensing. Herein, we report a simple in-situ growth strategy to synthesize CuI/Porphyrin-based graphdiyne (PDY) p-n heterojunction as a photocathode. CuI crystals were firstly deposited on the ITO glass surface via the electrochemical deposition , and CuI could catalyze the in-situ Glaser coupling reaction of 5,10,15,20-tetra(4-ethynylphenyl) porphyrin (TEPP), allowing the growth of PDY film on the CuI crystal surface and forming the p-n heterojunction photocathode. The as-prepared PDY film plays a crucial role in the significant enhancement of PEC performance because of its intense light absorption, and the formation of CuI/PDY p-n heterojunction can efficiently promote the transportation of photogenerated carriers between CuI and PDY thanks to the excellent electrical conductivity and high carrier mobility of highly π-conjugated PDY. After the growth of PDY, the photocurrent response of PDY/CuI/ITO is almost seven folds higher compared to that of CuI/ITO. Owing to the selective Cu–S bond interaction between l -cysteine (L-Cys) and Cu + , a PEC sensor for the L-Cys determination is developed with a broad linear range from 0.05 to 1.2 μM and a limit of detection (LOD) of 0.03 μM.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
·
IF 4.2
Weiting Yu,Dezheng Yang,Rendan Zhu,Luzhen Liu,Yan Yu,Juntao Tang,Zhiqiao He,Jiexu Ye,Shuang Song
The photoassisted electrochemical CO2 reduction reaction (CO2RR) toward CO is considered one of the most promising routes of CO2 utilization. In this work, 2,6-diaminopyridine (2,6-DAP) with both the pyridine ring and the –NH2 functional group is utilized for the first time to functionalize the surface of the electrode. The p-Si/Ag/2,6-DAP electrode has been identified as a good catalyst with relatively high activity and CO selectivity at a low overpotential as well as good stability. The Faradaic efficiency of CO is 84.56% at an optimized potential of −0.9 V vs reversible hydrogen electrode (RHE). A synergistic mechanism has been proposed for the enhanced catalytic performance of p-Si/Ag/2,6-DAP in the CO2RR. Ag facilitates the reduction of CO2 to produce CO. 2,6-DAP helps CO2 adsorption and inhibits the competitive hydrogen evolution reaction accompanying the CO2RR under low potentials.
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Advanced Healthcare Materials
·
2023
·
IF 10
Yupeng Guan,Hanqi Lei,Chengyuan Xing,Binyuan Yan,Bingbiao Lin,Xiangwei Yang,Hai Huang,Yang Kang,Jun Pang
Chemotherapy remains the most essential treatment for prostate cancer, but multidrug resistance (MDR) contributes to chemotherapy failure and tumor-related deaths. The overexpression of P-glycoprotein (P-gp) is one of the main mechanisms behind MDR. Here, we report a multimodal nanoplatform with a reactive oxygen species (ROS) cascade for gas therapy/ferroptosis/chemotherapy in reversing MDR. The nanoplatform disassembles when responding to intracellular ROS and exerts three main functions: First, NO-targeted delivery could reverse MDR by downregulating P-gp expression and inhibiting mitochondrial function. Second, ferrocene-induced ferroptosis breaks the redox balance in the tumor intracellular microenvironment and synergistically acts against the tumor. Third, the release of paclitaxel is precisely controlled in situ in the tumor for chemotherapy that avoids damage to normal tissues. Excitingly, this multimodal nanoplatform is a promising weapon for reversing MDR and may provide a pioneering paradigm for synergetic cancer therapy. This article is protected by copyright. All rights reserved
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiayou Liu,Xiaoxiang Huang,Lizhen Hu,Penglei Liu,Liuhu Jia,Keiko Sasaki,Zhongchao Tan,Hesheng Yu
Simultaneous avoidance of secondary air pollution and catalyst deactivation remains a challenge for existing photocatalytic removal of nitric oxide (NO). Herein, a photocatalysis-adsorption (P-A) heterojunction is synthesized for eco-friendly NO removal by facilely grinding Pd single atoms (Pd 1 ) anchored g-C 3 N 4 (48CN/Pd) with UiO-66-NH 2 (UION). Under visible-light irradiation, the 40UION-CN/Pd composite shows 93.91 % of NO removal efficiency with only 2.73 % of NO 2 emissions and negligible catalyst deactivation. The DeNO x index increases remarkably from −0.66 for 48CN/Pd to 0.86 for 40UION-CN/Pd. Furthermore, the synthesized P-A heterojunction efficiently removes NO from real flue gases produced by a domestic coal-fired stove and from SO 2 -rich flue gases. The mechanism exploration based on experimental investigations and density functional theory (DFT) calculations reveals that UION captures the NO 2 selectively produced by 48CN/Pd, simultaneously suppressing NO 2 emissions and refreshing active sites for NO photooxidation. Moreover, the results of X-ray photoelectron spectroscopy (XPS), charge density difference calculation, energy-resolved distribution of electron traps (ERDT) and in-situ Kelvin probe force microscopy (KPFM) reveal that the built-in electric field and Type-II heterojunction formed between 48CN/Pd and UION promote the separation of photogenerated carriers, enhancing the catalytic activity of the composite. This work provides an innovative strategy to avoid NO 2 emission and catalyst deactivation during photocatalytic NO removal.
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ANALYTICAL BIOCHEMISTRY
·
2023
·
IF 2.9
Ye Sun,Guangda Xu,Yue Wang,Peng Song,Yao Zhang,Lixin Xia
Herein, we developed a concise, time-efficient, and high selective assay for detecting Fe 2+ through its triggered surface plasmon-assisted reduction reaction of p -nitrothiophenol (PNTP) to p,p ′-dimercaptoazobenzene (DMAB) on the surface of gold nanoparticles (AuNPs) based on surface-enhanced Raman scattering (SERS) spectroscopy. When Fe 2+ was added to the PNTP-AuNPs system, the appearance of three characteristic peaks at 1142, 1392, and 1440 cm −1 attributed to DMAB demonstrated that Fe 2+ induced the catalytic coupling reaction of PNTP. The Raman intensity ratio of the peak at 1142 cm −1 to the peak at 1336 cm −1 and the concentration of Fe 2+ presented a good linear response from 10 to 100 μM with a limit of detection (LOD) of 0.35 μM. More importantly, the entire detection process can be completed within 2 min and further successfully used for the detection of Fe 2+ in river water.
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