APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Wenqing Wang,Fan Wu,Hao Li,Jianming Pan
A photocatalytic self-propelled nanomotor adsorbent was developed for Pd(II) recovery. • Self-propulsion overcomes diffusion-limited adsorption kinetics. • EPR reveals the ROS-mediated mechanism of long-term propulsion. • Selective Pd(II) recovery is achieved in complex acidic wastewater. The recovery of palladium (Pd) from complex acidic industrial wastewater is severely restricted by sluggish interfacial mass transfer and inherent diffusion-limited adsorption kinetics. To address this long-standing bottleneck, asymmetric N/Se-codoped resorcinol-formaldehyde nanomotors (Se-RF@NMs) were rationally fabricated via an emulsion-confined anisotropic growth strategy for photocatalytic self-propulsion-boosted Pd(II) recovey. Under light irradiation, the photoresponsive resin framework enables continuous in-situ H 2 O 2 generation. Meanwhile, the adsorption-induced in-situ reduction of Pd(II) further accelerates catalytic H 2 O 2 decomposition to generate oxygen microbubbles, endowing nanomotors with sustainable autonomous motion and dynamically promoting interfacial ion transport. EPR characterization confirms that photogenerated holes and reactive oxygen species sustain the cyclic H 2 O 2 generation-decomposition system, effectively stabilizing the self-propulsion behavior of Se-RF@NMs. Benefiting from the synergistic coupling of photocatalytic self-propulsion and N/Se-based selective coordination adsorption, the optimized Se-RF@NMs achieve a superior Pd(II) adsorption capacity of 196.75 mg g −1 , as well as excellent selectivity in multi-metal competitive systems and practical industrial wastewater matrices. This work elucidates a photocatalysis-driven active mass transfer enhancement mechanism, establishing a feasible paradigm to break the intrinsic diffusion limitation of conventional adsorption. It provides new insights into the rational design of intelligent self-propelled catalytic adsorbents for high-efficiency precious metal recovery in complex and harsh water environments. Download: Download high-res image (152KB) Download: Download full-size image
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JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Dan Yang,Yang Luo,Shang Wei Yuan,Li Xia Chen,Pei Hua Ma,Zhu Tao,Xin Xiao
In recent years, most of the constructions on cucurbit[ n ]uril-based supramolecular polymers have been based on host–guest chemistry, however, this limits the choice of host and guest. Herein, we present a newly designed supramolecular polymer, namely Q[8]@PEG-HPTS formed by utilizing outer surface Q[8] interactions. In aqueous solution, the supramolecular polymer Q[8]@PEG-HPTS was obtained quickly and simply by mixing Q[8] with PEG-HPTS, where after, a variety of characterization techniques were employed to confirm the structure of the Q[8]@PEG-HPTS. The ability of this system to selectively recognize metal ions as well as pesticide molecules was also investigated; selectivity was observed for Fe 3+ and paraquat. The biocompatibility and excellent fluorescence properties associated with the constituents of the supramolecular polymer allowed for the imaging of HeLa cells. This system could image and trace the nucleus through the cytoplasm, indicating that it could enter and internalize HeLa cells. Finally, by continuously adjusting the ratio between Q[8] and PEG-HPTS, a Q[8]@PEG-HPTS hydrogel was obtained. This hydrogel exhibited a stimulated temperature response, and opens up further possibilities for exploring the applications of such supramolecular polymers.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 26
·7741-7751
·
IF 4.478
Liu Yuqian,Hu Xianyun,Liang Fangyuan,Cao Yajing
Exploring sensors based on Förster resonance energy transfer (FRET) systems enables the continuous development of biological sensing technologies. Herein, we report the construction of a FRET sensor with dual-emissive quantum dots (QDs) and meso -tetra(4-sulfonatophenyl) porphine (TSPP). The sensor is composed of mesial green-emissive QDs with a thick silica shell (gQD@SiO 2 ) and circumjacent blue-emissive QDs coated with ultra-thin silica spacer, on which is linked TSPP (bQD@SiO 2 -TSPP). The gQD@SiO 2 endows the sensor with a fluorescent background. Due to the ultra-thin silica spacing, coupled with the superior resonance effect of bQD fluorescence and the Soret-band absorption of TSPP, the FRET efficiency is highly sensitive to the chelation state of TSPP. Relying on the absorbance transition of TSPP complexed with Fe(III), the FRET sensor is applied for ultra-sensitive Fe(III) detection. In aqueous solution, the sensor is demonstrated to linearly detect Fe(III) in the range of 0–1 μM, with a limit of detection (LOD) of 40 nM. More importantly, reliable Fe(III) detection can be achieved via the specific complexation of Fe(III) by TSPP and the ratiometric fluorescent response. As such, the inter-/intra-day precisions in standard samples, as well as the recovery rate in biological matrices, are fully validated. The excellent analytical performance, in combination with the excellent biocompatibility of the FRET sensor, allows semi-quantitative Fe(III) imaging in living cells. Graphical abstract
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Chemical Biology & Drug Design
·
2022
·Vol. 100
·期 3
·305-312
·
IF 2.873
Shiyang Zhou,Xiaofeng Zhou,Gangliang Huang
In order to explore the potential anti-tumor activity functional molecules, a series of Fissitungfine B derivatives were designed and synthesized. Their anti-tumor activity effects on Hela, MCF-7 and A-549 cell lines were evaluated in vitro. The results showed that some of these Fissitungfine B derivatives exhibited moderate to good anti-tumor activities. Especially, compound 4 g with the highest inhibitory activities against all tested cell lines with the Hela was IC 50 = 3.82 ± 0.56 μM, MCF-7 was IC 50 = 5.53 ± 0.68 μM, and A-549 was IC 50 = 4.55 ± 0.53 μM. Furthermore, the compounds 4 g have higher inhibitory effects on TDP2 in vitro . In vivo, the biological activities assay results showed that the target compound 4 g had a good inhibitory effect on tumor growth . The target compound 4 g could inhibit tumor growth well, which might be use as a candidate drug or lead compound for further research and development anti-tumor agents.
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高影响因子
CHEMISTRY & BIODIVERSITY
·
2022
·Vol. 19
·期 4
·e202101039
·
IF 2.745
Zhiping Che,Yuanhao Li,Xiaolong Guo,Jiaxuan He,Song Zhang,Lina Zhu,Yibo Liu,Ruxue Wei,Yingjun Yang,Xiaobo Huang,Shengming Liu,Genqiang Chen,Yuee Tian
In order to discover highly active fungicides, sixteen novel sulfonate derivatives of Fenjuntong were synthesized by structural modification of 2′-hydroxybutyrophenone, and their anti-oomycete activity against Phytophthora capsici Leonian was determined in this study. Among all tested compounds, compound 3b displayed more significant anti-oomycete activity than the precursor Fenjuntong against P. capsici , and the EC 50 values of 3b and Fenjuntong were 84.50 and 517.25 mg/L, respectively. By comparing the anti-oomycete activity of compounds 3a – p , I-a – p , and II-a – p , the following conclusions were drawn: (1) Hydroxy group is well tolerated, and sulfonylation of hydroxy group enhances its anti-oomycete activity. (2) The proper length of the ketone carbonyl chain is very important for their anti-oomycete activity. (3) The presence of a site methoxy group in the structural skeleton is closely related to the anti-oomycete activity. These important results will pave the way for further modification of Fenjuntong to develop potential new fungicides. Graphical
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 14
·6636-6645
·
IF 3.925
Huiting He,Min Zheng,Qiang Liu,Jian Liu,Juan Zhao,Yuting Zhuang,Xianxiang Liu,Qiong Xu,Steven R. Kirk,Dulin Yin
Through the amidation reaction with 2-methylimidazole, organic basic groups were introduced into the carboxyl sites of activated carbon to obtain imidazolyl activated carbon. H3+xPW12−xVxO40 (x = 0, 1, 2, or 3) was chemically bonded to the surface, which was used to catalyze the oxidation of perillyl alcohol by hydrogen peroxide. After reaction at 60 °C for 5 h, AC-COIMIH+[H4PW10V2]− could catalyze almost complete oxidation of the substrate, where the conversion reached 97.4%, the selectivity for the 1,2-epoxide was 80.0%, and the stereo configuration of the epoxide product was RR/SS = 5 : 3. In addition, the catalyst could be easily recovered via centrifugation and reused five times without any significant deactivation. By calculating the Fukui function of perillyl alcohol, we consider a proper explanation for the main product from the oxidation of the allyl alcohol. A cooperative epoxidation mechanism with electrostatic adsorption of a double bond, and hydrogen-bonded adsorption of hydroxyl was proposed.
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Materials Advances
·
2022
·Vol. 3
·期 5
·2505-2514
·
IF 0
Wenzhu Yin,Dechun Xuan,Bihua Deng,Mingxu Zhou,Fang Ma,Jinqiu Zhang,Yu Lu
Adjuvants have proven to be integral components in most vaccines for promoting appropriate immune responses at both innate and adaptive levels. Imiquimod (IMQ, R837), an agonist for Toll-like receptors 7 (TLR7), is a potent molecular activator of the innate immune system and has been developed as an adjuvant for immunotherapy. However, due to its pharmacokinetic profile, IMQ may induce strong local and systemic inflammatory reactions and is poorly tolerated. To overcome these hurdles, herein, we conjugate IMQ and lauryl alcohol (LA) to the backbone of biodegradable poly (γ-glutamic acid) (γ-PGA) to prepare an amphiphilic polymer (shortened to γ-PGA-IMQ-LA) with improved stability and biodistribution of IMQ. In order to investigate the distribution of the amphiphilic polymer in vitro and in vivo, fluorescein was grafted to the lateral chain to synthesize fluorescent-labeled γ-PGA-IMQ-LA-FL (shortened to FIP). The novel amphiphilic FIP polymer was characterized via1H NMR, FI-IR, UV-vis, fluorescence spectra and zeta potential. Using ovalbumin (OVA) as a model antigen and FIP as an adjuvant for immunization, the formulations of FIP + OVA in different dosages could significantly promote the production of OVA-specific IgG in mice and prolong immune responses with acceptable safety.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xinsheng Tang,Xiong Liu,Fangfei Liu,Tursun Abdiryim,Ruxangul Jamal,Nawrzhan Serkjan,Shuyue Xie,Cong Xue,Qian Cheng
Pyro-phototronic effect plays an important role in improving the photodetection performance of ultraviolet (UV) photodetectors (PDs). Here, a novel pyro-phototronic effect between TiO 2 nanoarrays (TiO 2 NRs) and the conducting polymer poly(3,4-ethylenedioxy selenophene) (PEDOS) is applied to fabricate a self-powered UV PD with the enhanced photodetection ability. The self-powered p-n heterojunction UV PD is fabricated by a face-to-face hybrid of acid (HCl and H 2 SO 4 )-treated TiO 2 NRs with PEDOS. Interestingly, a pyro-phototronic effect is found between TiO 2 NRs/FTO and PEDOS/FTO, and the acid treatment of TiO 2 NRs can dramatically enhance the pyro-phototronic effect. H 2 SO 4 treatment can improve the p-n heterojunction, while HCl treatment can increase carrier concentration due to the introduction of surface oxygen vacancies on the surface of TiO 2 NRs. Under UV light illumination and 0 bias voltage, the rise time (T rise ) and fall time (T fall ) of UV PD from the face-to-face hybrid of PEDOS/FTO with TiO 2 (HCl)/FTO are 0.080 s and 0.079 s, while the responsivity (R) and detectivity (D*) are 58.706 mA/W and 3.627 × 10 11 Jones, respectively. The face-to-face fabrication of UV PDs and the matching of the energy levels between PEDOS and TiO 2 NRs cause the pyro-phototronic effect due to temperature change and pyroelectric effect of TiO 2 NRs under the UV light illumination. This work gives a new idea to generate pyro-phototronic effect between TiO 2 NRs and conducting polymers for application in UV PDs field.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xinsheng Tang,Tursun Abdiryim,Ruxangul Jamal,Xiong Liu,Fangfei Liu,Feng Xu,Abdukeyum Abdurexit,Qian Cheng,Nawrzhan Serkjan,Shuyue Xie,Yiming Liu
TiO 2 -based ultraviolet (UV) photodetectors (PDs) with broadband optical detection range are widely used in commercial and military applications. Nevertheless, the self-powered UV PDs of TiO 2 nanoarrays (NRs) have relatively low response rates and slow response times. Here, a high responsivity self-powered p-n heterojunction UV PD based on TiO 2 NRs: CQDs/FTO and PEDOS/FTO is fabricated by a simple face-to-face assembly process. The pyroelectric effect of TiO 2 NRs is enhanced by sensitizing TiO 2 NRs with CQDs, which would reduce the bandgap value of TiO 2 NR, broaden the range of photoresponse, and reduce recombination of electron-hole. Furthermore, the pyro-phototronic effect of CQDs, the energy level matching from CQDs to PEDOS and the interaction between –OH in CQDs and ethylene oxide groups in PEDOS enhance the performance of the prepared UV PDs. The TiO 2 NRs: CQDs//PEDOS UV PDs achieve a high photo-responsivity and photo-detectivity of 150.95 mA/W and 3.73 × 10 11 Jones at 0 bias (365 nm), respectively, which are better than those at wavelengths of 380 nm. We also found that the photocurrent induced via the pyro-phototronic effect increases with the light power intensity. This work points the way for photovoltaic and photo-induced pyro-phototronic effects to improve the performance of TiO 2 NRs-based UV PDs.
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MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2021
·Vol. 222
·期 15
·2100103
·
IF 2.527
Xiaofei Shen,Hailong Huang,Hao Qian,Longxiang Tang,Yan Zhang,Min Xu,Huiqing Wang,Zhongkai Wang
Chiral property of cellulose can be transferred to final materials, here artificial helical polymer, right-handed helical poly(phenyl isocyanide) (PPI) is grafted onto ethyl cellulose (EC) with expecting to enhance the chiral effect of PPI. EC-2,3-g-PPI n copolymers are prepared via “click” chemistry of copper-catalyzed alkyne-azide cycloaddition, and confirmed by high-resolution 1 H and 13 C NMR, Fourier transform infrared spectroscopy (FTIR), and gel permeation chromatography (GPC). The resulting EC-2,3-g-PPI n copolymer takes a right-handed helical structure with super circular dichroism intensity which is 302% higher than that of PPI, which indicates that EC backbone promotes the right-handed chirality of PPI n . Furthermore, EC-2,3-g-PPI n exhibits good chiral recognition ability of the D/L-Ala-DNSP fluorescent probe, and induces a uniquely visible blue shift for L-Ala-DNSP. Therefore, a novel facile strategy is provided to highly improve chiral property and chiral recognition ability of artificial helical polymers by grafting onto EC.
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SYNTHETIC METALS
·
2018
·
IF 2.526
Sumin Wang,Lu Li,Qiguan Wang,Yaru Fan,Jingwen Shen,Kai Zhang,Lei Yang,Wenzhi Zhang
The surface of graphene (Gr) was covalently attached by an aniline oligomer, from the coupling of graphene oxide with aniline tetramer, followed by reduction process. After linked by tetramer aniline, the graphene materials showed remarkably enhanced electrochemical performances. The conductivity of the graphene was increased from 5.8 S cm −1 to 41.7 S cm ‒1 , under the strong doping effect between Gr and tetramer aniline by means of the π‒π interactions, which was analyzed by FT‒IR, UV–vis and XPS spectra. In addition, the aniline oligomer attached to reduced graphene oxide (AOAG) showed a remarkable energy-storage behavior due to the synergistic effect. The capacitance of AOAGs can be 370 F g −1 , while it is 114 F g −1 and 129 F g −1 for graphene oxide and tetramer aniline respectively. Because the covalent bonding between graphene and aniline oligomer can effectively combine the excellent mechanical strength of graphene and the large faradic pseudocapacitance of aniline oligomer, the AOAGs showed quite high charge-discharge cycle stability besides remarkable capacitance. In addition, the ease of electron motion mediated by the covalent bonding in AOAGs supports the sample significant electrochemical catalysis towards nifedipine. Compared with graphene and tetramer aniline, the oxidative current of nifedipine on AOAG showed five-fold increase.
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Polymers
·
2018
·Vol. 10
·期 11
·1253
·
IF 2.935
Quanling Xie,Shishen Zhang,Hanjun Ma,Wenyao Shao,Xiao Gong,Zhuan Hong
In order to develop a high-performance thin-film nanocomposite (TFN) nanofiltration (NF) membrane, the functionalized graphene-based nanomaterial (GO-HBE-COOH) was synthesized by combining two-dimensional graphene oxide (GO) with a three-dimensional hyperbranched polymer, which was used as the novel nanofiller and successfully embedded into the polypiperazine-amide (PPA) active layers on polysulfone (PSU) substrates via interfacial polymerization (IP) process. The resultant NF membranes were characterized using ATR-FTIR, SEM, and AFM, while their performance was evaluated in terms of water flux, salt rejection, antifouling ability, and chlorine resistance. The influence of GO-HBE-COOH concentration on the morphologies, properties, and performance of TFN NF membranes was investigated. With the addition of 60 ppm GO-HBE-COOH, the TFN-GHC-60 NF membrane exhibited the optimal water flux without a sacrifice of the salt rejection. It was found that the introduction of GO-HBE-COOH nanosheets favored the formation of a thinner and smoother nanocomposite active layer with an enhanced hydrophilicity and negative charge. As a result, TFN NF membranes demonstrated a superior permeaselectivity, antifouling ability, and chlorine resistance over the conventional PPA thin-film composite (TFC) membranes.Keywords:nanofiltration;thin-film nanocomposite;graphene oxide;hyperbranched polyester;carboxylation
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