GREEN CHEMISTRY
·
2021
·Vol. 24
·期 1
·384-393
·
IF 10.182
Qi Zhang,Shouxin Liu,Xia Tian,Yidong Liu,Shiming Fan,Baibiao Huang,Andrew Whiting
A highly selective, green and sustainable chlorination of aliphatic C–H bonds is reported using MCln under the co-catalysis of visible light and nano-Cu@CuCl, which was synthesised via a one-step, hydrothermal strategy using copper(II) sulfate and D-glucose as the reducing agent in a KCl solution. A novel cascade method of producing Cl2 occurs in situ chlorinating C(sp3)–Hs, achieved through nano-Cu@CuCl catalysis using inorganic chloride MCln as a chlorine source under visible light and without the need for a strong oxidant. The reaction was applied to the chlorination of different alkylarene α-Hs and cyclic hydrocarbons C–HS and was developed for use in a photocatalytic serial reactor system which accomplished the chlorination of toluene α-Hs to give 92% conversion, 90% yield and 98% selectivity. Electron spin resonance (ESR) studies of DMPO-Cl. revealed that the reaction mechanism belonged to a free radical process.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Qihui Wang,Qianyuan Zhang,Chunli Li,Pinggui Tang,Yongjun Feng
Recycling precious metal active components and supports from spent catalysts is critical for resource utilization and environmental sustainability. Herein, we developed a hydroxyl/cyanide radicals oxidation strategy to achieve efficient recovery of Pd and Ag from spent acetylene hydrogenation catalysts while maximizing alumina support retention. Key parameters influencing Pd/Ag leaching efficiencies and support preservation were systematically investigated, and the underlying leaching mechanisms of the precious metals were elucidated. Under the synergistic action of multiple reactive species (•OH, •CN, O₂• − , and 1 O₂) from H₂O₂ and acetonitrile, Pd and Ag leaching efficiencies reached 100.00 % and 90.91 %, respectively. Kinetic analysis revealed that Pd and Ag leaching was dominated by chemical reaction control. Characterization of the recycled alumina (R-Al 2 O 3 ) confirmed that its crystal structure, surface acid-base properties, and elemental composition were largely preserved. Notably, R-Al 2 O 3 exhibited 96 % retention of crushing strength, 83.79 % retention of average pore size, and 88.24 % retention of total pore volume. This strategy not only enables effective precious metal recovery but also maintains the structural integrity of the carrier, providing a sustainable route for the industrial reuse of spent catalysts.
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JOURNAL OF FLUORESCENCE
·
2022
·Vol. 33
·期 1
·91-101
·
IF 2.525
Li Zhigang,Zhao Bing,Kan Wei,Bu Fanqiang,Qi Xin,Wang Liyan,Song Bo,Ding Limin
A reactive fluorescent “turn-on” probe ( di-PIP ) with imine-linked dual phenanthro[9,10- d ]imidazole luminophore have been conveniently prepared as an Al 3+ and H + dual functional receptor. di-PIP displayed high selectivity and sensitivity towards Al 3+ ion in DMF/HEPES accompanied by fluorescence blue-shift and a good linear relationship as well as a low detection limit of 30.5 nmol·L –1 , which can root from the synergetic functions of the decomposition reaction of di-PIP promoted by acidic Al 3+ and the coordination effect between decomposition product and Al 3+ . Intriguingly, it was found that hydrogen ion H + can be sufficient for simulating the fluorescence enhancing of di-PIP . 1 H NMR titration and MS analyses for elucidation of the intermediate structure further revealed that the acid-triggered decomposition reaction resulted in the rapid, and sensitive sensing to Al 3+ and H + . In addition, the probe di-PIP could be successfully applied to the detection of Al 3+ in real water samples, and also utilized to visualize Al 3+ and H + in the living cells.
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JOURNAL OF ORGANIC CHEMISTRY
·
2024
·
IF 3.3
Jun-Feng Yang,Yun-Fei Liu,Lin-Lin Wei,Kai-Kai Qiao,Yan-Qiu Zhao,Lei Shi
The Minisci-type dehydrogenative coupling of N-heteroaromatic rings with inert C–H or Si–H partners via visible-light-catalyzed hydrogen atom transfer has been reported. This methodology allows the coupling reactions to be carried out in water as a solvent under air atmospheric conditions with visible-light illumination. A wide range of inert C–H and Si–H partners could be directly coupled with various N-aromatic heterocycles to deliver products in good to excellent yields.
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Science China-Chemistry
·
2022
·Vol. 66
·期 2
·548-561
·
IF 10.138
Zhao Ying-Han,Li Wenhao,Shen Tao,Zhao Yan,Liu Yunqi,Wang Yang
The development of readily accessible high-mobility n-type semiconducting polymers is in great demand for realizing high-performance p-n junction-based organic electronics. In this study, we demonstrate that with the combination of dual-acceptor strategy and C-H direct arylation polymerization (DArP), unipolar n-type semiconducting polymers can be conveniently synthesized. By tuning the monomer concentration, three dual-acceptor polymers, namely, poly(naphthalene diimide- alt -dithiophenyl pyrrolopyrrole-dione) (PNDI-DPP), poly(naphthalene diimide- alt -dithiophenyl isoindigo) (PNDI-IID), and poly (naphthalene diimide- alt -dithiophenyl bezothiadiazole) (PNDI-BT) can be obtained via C-H activation with decent number average molecular weight of ∼10 to 30 kg mol −1 and relatively narrow polydispersity index of ∼2. In addition, these polymers are defect-free in nature as evidenced by the nuclear magnetic resonance. Moreover, we attribute the different molar masses of the three copolymers under the same DArP condition to the different α-C-H acidity, which may stem from different electron-withdrawing capability of the hydrogenated acceptor units. Furthermore, the influence of the hydrogenated acceptor monomers on the optical, electrochemical and charge transporting properties is comprehensively studied. Among the three dual-acceptor polymers, PNDI-BT demonstrates the highest electron mobilities of up to 0.6 cm 2 V −1 s −1 in unipolar n-type organic transistors because of its relatively planar backbone, larger overlaps of the lowest unoccupied molecular orbital and strong H-aggregation. Note that the transistor performance of PNDI-BT synthesized via C-H activation in this study is at least comparable to the one made by conventional C(sp 2 )-C(sp 2 ) Stille or Suzuki cross-coupling polymerization. This study demonstrates the presented protocol can be a useful platform for sustainable and convenient synthesis of high-performance n-type semiconducting polymers.
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APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yangqing He,Na Xu,Lucas Binnah Junior,Xing Hao,Binghua Yao,Qian Yang,Dongjie Liu,Zhanying Ma
Construction of semiconductor-assisted noble metal nanocomposites has been approved as an efficient strategy to achieve promising photocatalysts. In this paper, highly efficient AuNPs/h-BN nanocomposites have been fabricated by loading gold nanoparticles (AuNPs) as interfacial electron transfer mediators onto the hexagonal boron nitride nanosheets (h-BN). The SEM and HRTEM images, together with XPS analysis revealed that AuNPs were successfully deposited onto the surface of h-BN and the layered heterojunctions were generated between AuNPs and h-BN. The optimum 15%AuNPs/h-BN nanocomposites exhibit dramatically enhanced photocatalytic performance for degradation of levofloxacin hydrochloride with 84.4% removal rate, and hydrogen evolution of 61.15 μmol within 5 h. It is almost 4 and 61 times higher than that of pure h-BN, respectively. In addition, this is the first time using h-BN based material to evaluate the elimination efficiency of levofloxacin hydrochloride. The corresponding enhanced mechanism for 15%AuNPs/h-BN can be attributed to the effective interfacial electron-hole pairs separation and migration between h-BH and AuNPs and its surface Plasmon absorption (SPA). Moreover, the possible decomposition pathways for levofloxacin hydrochloride are proposed according to the UPLC-MS analysis. Herein, we have provided a good example for removing antibiotic residues by using h-BN-based metal nanocomposites towards environmental remediation.
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LWT-FOOD SCIENCE AND TECHNOLOGY
·
2026
·
IF 7.1
Di Wang,Wenqi Wang,Bijun Zhao,Jiayun Liang,Lingzhu Song,Yixuan Chen,Wushuang Bai
A novel electrochemical–visual colorimetric AFB1 biosensing method was proposed. • The sensing method achieves spatial separation of AFB1 recognition and detection. • The electrochemical mode achieves low LOD of 4.2 × 10 −7 ng/mL and wide linear range. • The colorimetric modal achieves low LOD of 3.4 × 10 −7 ng/mL and wide linear range. • This work proposes a general dual-mode trace-level targets biosensing strategy. Aflatoxin B1 (AFB1) can be present in moldy grains, nuts, oil crops, and their processed by-products, posing a threat to food safety and human health. Therefore, sensitive and efficient detection of trace AFB1 is of great significance for early intervention in protection of food safety. In this research, an aptamer was used as the recognition agent for AFB1, a novel magnetically controlled electrochemical-visual colorimetric dual-mode AFB1 biosensing strategy was developed. H-shaped device consisting of a left cell and a right cell was designed, with the anodic aluminum oxide (AAO) membrane nanochannel in between. Under magnetic control, specific recognition of AFB1 by the aptamer in the left cell triggers DNA hybridization chain reaction (HCR) in the right cell, forming a glucose oxidase and peroxidase-like DNA G-quadruplex cascade catalytic structure, enabling the determination of AFB1 via glucose catalysis. This method incorporates dual signal amplification technology (HCR and enzyme cascade catalytic) and achieves spatial separation between AFB1 recognition and detection, thereby effectively reducing background interference and improving sensitivity. Using the electrochemical mode (Differential pulse voltammetry), the method achieved low limit of detection (LOD) of 4.2 × 10 −7 ng/mL, wide linear range of 10 −6 -10 2 ng/mL, excellent selectivity and anti-interference performance. Using the visual colorimetric mode, the LOD was as low as 3.4 × 10 −7 ng/mL and the linear range was 10 −6 -10 4 ng/mL. This work proposes a general dual-mode biosensing strategy and provides a promising approach for highly sensitive and efficient detection of trace-level targets in complex samples.
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Polymer Chemistry
·
2020
·Vol. 11
·期 34
·5463-5474
·
IF 5.342
Wuhou Fan,Yong Jin,Liangjie Shi
Achieving the room-temperature self-healing of polymer materials with mechanically robust and tough features is a challenging project due to their conflicting attributes. Herein, a novel design concept of dynamic but mechanically robust and tough polymer networks was proposed derived from dynamic diselenide bonds and dual H-bonds, in which flexible fluorinated siloxane units and H-bonded urethane and urea groups are embedded simultaneously. Through adjustment of the mass fraction of fluorinated siloxane units incorporated, waterborne polyurethanes with good mechanical performances (tensile strength: 16.31 MPa; toughness: 69.8 MJ m−3) could be constructed. Meanwhile, this optimized sample could also be healed at room-temperature within 2 h under visible light. Therefore, the fast room-temperature self-healing of our elaborated polymers with mechanically robust and tough features is achieved, which has never been achieved for the contemporary polymer materials. The reconstruction of dual H-bonding interactions of urethane and urea moieties is responsible for the prophase healing after reconnecting the fracture surfaces, and macromolecular chains containing fluorinated siloxane units with excellent flexibility could promote the visible-light-triggered diselenide metathesis in a highly efficient manner subsequently. Moreover, much improved water resistance properties could also be achieved. The elaborated strategy will provide inspiration for developing mechanically robust and tough water-dispersed polymer materials with fast room-temperature self-repairing performance and desirable water resistance properties, which are of vital importance to the next generation of smart materials.
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APPLIED CATALYSIS A-GENERAL
·
2020
·
IF 5.006
Feng Lin,Yulong Ma,Yonggang Sun,Xiuqin Men,Yingbo Zhu,Tingting Gao,Kanghe Zhao
Strategies for catalytic lignin depolymerization to yield ethylbenzene chemicals are green, sustainable and environmentally friendly methods. In this study, a series of Ni-CeO 2 /H-ZSM-5 catalysts were prepared via the precipitation method, which catalytically degraded the β-O-4 chemical bonding structure to yield ethylbenzene chemicals. The 2-(2-methoxy-phenoxy)-1-phenylethanol substance (β-O-4) was selected as a typical lignin model compound for the investigation of the intrinsic depolymerization mechanism and the catalytic performance. The results demonstrated that the introduced CeO 2 active phase can effectively promote the catalytic conversion of the β-O-4 chemical bonding structure to ethylbenzene chemicals. Physicochemical data demonstrate that the reaction pathways and hydrogenation selectivity were effectively regulated and controlled by the tuning of the dehydration and hydrogenolysis processes via the introduction of CeO 2 , which realized the selective adjustment of the redox properties and the surface valence states of active species in the catalytic process due to its excellent oxygen transfer performance.
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Chemical Engineering Journal Advances
·
2020
·
IF 0
Jiuhu Zhao,Zhengzhong Wen,Rongshu Zhu,Zhi Li,Ran Ding,Yongji Zhu,Tingkun Gu,Rong Yang,Zhenye Zhu
In this paper, In-metal oxide/H-Beta catalysts were synthesized by ion exchange method and In-Co 3 O 4 /H-Beta exhibited the highest catalytic activity for the selective catalytic reduction of NO x with CH 4 in presence of H 2 O and SO 2 . Thus, the synthesis conditions of In-Co 3 O 4 /H-Beta were optimized. The results showed that In-Co 3 O 4 /H-Beta exhibited excellent catalytic performance and high CH 4 selectively when the synthesis was carried out by ion exchange method, the ratio of Si and Al in H-Beta was 25, the ratio of Co 3 O 4 and H-Beta was 5:40, the concentration of ion exchange liquid was 0.033 M and calcination temperature was 500 °C. The NO x removal efficiency was about 87.6 % and N 2 selectivity could reach 96.3% in the presence of H 2 O and SO 2 . Through a series of characterizations, it was concluded that In-Co 3 O 4 /H-Beta owned stable catalyst structure, abundant Brønsted acid sites and the highest ratio of InO + /In 2 O 3 under the optimal synthesis conditions. In addition, the doped of Co 3 O 4 could inhibit the adsorption of sulfate species on the surface of In/H-Beta catalyst, leading to the excellent H 2 O and SO 2 resistance property.
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FOOD CHEMISTRY
·
2026
·
IF 9.8
Shuo Yang,Jinglong Qu,Yang Qin,Shuaibing An,Kaiqiang Huang,Yaling Wei,Jun Xi
Ara h 3, a prevalent peanut allergy, presents a considerable risk to public health. Preventing exposure to food allergens is the paramount method for safeguarding those with allergies. Consequently, we devised a polydopamine (PDA)-modulated gold self-coupling technique to fabricate plasmonic blackbodies (AuNBs@PDA) featuring multibranched configurations. High-performance SERS labels are possible using AuNBs@PDA's PDA coating and multi-branched design. It detects Ara h 3 ultra-sensitively in lateral flow immunochromatographic test strips (LFIA). SERS-LFIA has outstanding specificity, stability, and reproducibility, with a test strip shelf life of over a year and a LOD of 72.2 pg/mL, 295 times higher than standard AuNPs-LFIA. Implementing this technology accurately detects food samples. This sensitive and reliable platform for Ara h 3 detection has great potential for food allergy monitoring.
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Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 26
·20610-20619
·
IF 9.5
Yutong Xia,Gege Wang,Jing Wu,Xiaowei Chi,Yu Liu
Aqueous zinc metal batteries (AZMBs) have garnered significant attention owing to the inherent safety of aqueous electrolytes and the zinc anode's high theoretical specific capacity (820 mA h g−1). However, interfacial instability arising from rampant zinc dendrite growth and parasitic side reactions at the electrolyte/anode interface critically hinders practical implementation. Herein, we report an in situ solid electrolyte interphase (SEI) engineering strategy via frustrated Lewis pair (FLP)-mediated polymerization of 2-acrylamido-2-methylpropane sulfonic acid (AMPS), where FLP catalysis is achieved through synergistic interactions between metallic zinc and Zn2+ cations at the electrolyte/anode interface. In contrast to conventional electrolyte additives that rely on physical adsorption or chemical passivation, the polymerized AMPS (PAMPS) establishes a dual-functional interface: (i) rapid Zn2+ ion transport channels through sulfonic acid groups, and (ii) robust chemical bonding with zinc via acrylamide moieties. This unique architecture enables simultaneous regulation of Zn2+ flux homogeneity and interfacial stabilization. Accordingly, Zn‖Zn symmetric cells with the AMPS-containing electrolyte show stable cycling for 6500 h at 1 mA cm−2. Notably, under extreme conditions (10 mA cm−2, 10 mA h cm−2), the PAMPS-enabled anode achieves a coulombic efficiency of 99.7% and an unprecedented cumulative areal capacity of 12 A h cm−2—a fourfold improvement over state-of-the-art benchmarks. Additionally, the MnO2‖Zn full cells with the AMPS-containing electrolyte exhibit a high specific capacity of 300 mA h g−1 at 500 mA g−1 and long cycling stability of 10 000 cycles at 1.58 A g−1. This work offers a facile, economical and effective approach for designing a high-performance aqueous zinc metal battery for practical applications.
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