Facile Liquid Research Articles

Isotope Exchange-Based 18F-Labeling Methods.

18F-Labeling methods for the preparation of 18F-labeled molecular probes can be classified into electrophilic fluorination, nucleophilic fluorination, metal-F coordination, and 18F/19F isotope exchange. Isotope exchange-based 18F-labeling methods demonstrate mild conditions featuring water resistance and facile high-performance liquid chromatography-free purification in direct 18F-labeling of substrates. This paper systematically reviews isotope exchange-based 18F-labeling methods sorted by the adjacent atom bonding with F, i.e., carbon and noncarbon atoms (Si, B, P, S, Ga, Fe, etc.). The respective isotope exchange mechanism, radiolabeling condition, radiochemical yield, molar activity, and stability of the 18F-product are mainly discussed for each isotope exchange-based 18F-labeling method as well as the cutting-edge application of the corresponding 18F-labeled molecular probes.

Oxygen-vacancy-rich Ag/Bi5O7Br nanosheets enable improved photocatalytic NO removal and oxygen evolution under visible light exposure

Photocatalytic NO removal is a green and sustainable alternative to the conventional thermocatalysis in the conversion of NO to nitrates. However, the efficiency of photocatalytic NO removal is restricted by weak NO adsorption and high charge recombination on photocatalyst. Herein, we report on one-step synthesis of Ag/Bi5O7Br nanosheets with rich oxygen vacancies (OVs) by a facile liquid phase reduction method. Under visible light irradiation on oxygen-vacancy-rich Ag/Bi5O7Br for 50 min the photocatalytic NO removal ratio is up to 64.65%, which is about 1.6 times higher than that by using pristine Bi5O7Br. The average oxygen production rate is 823 μmol·g−1·h−1, which is nearly 10 times higher than that of Bi5O7Br. Density functional theory (DFT) calculations reveal that OVs incorporation and plasmonic Ag can synergistically strengthen NO adsorption on Bi5O7Br. This work highlights the great potential of defects and plasmonic metals on synergistic enhancement in photocatalytic NO removal and oxygen evolution.

Integration of filter membrane and Ca2Nb3O10 nanosheets for high performance flexible UV photodetectors

• We first report the integration of filter membrane and Ca 2 Nb 3 O 10 nanosheets UV photodetectors (FM@CNO UV PDs). • The FM@CNO PD shows high responsivity (0.08 AW −1 ), high detectivity (1.1 × 10 12 Jones), high UV/visible rejection ratio (3.86 × 10 3 ) and fast speed (0.12/1.24 ms) under 300 nm light illumination. • The FM@CNO PD exhibits excellent flexibility after many bending cycles. And the FM@CNO array device can be used as a pixel array detector for UV imaging. We report that the integration of filter membrane and Ca 2 Nb 3 O 10 nanosheets (FM@CNO) UV photodetector (UV PD) shows high performance and excellent flexibility. The Ca 2 Nb 3 O 10 nanosheets were prepared by a facile solid-state reaction and liquid exfoliation process. The Ca 2 Nb 3 O 10 nanosheets can be integrated into the pores of a filter membrane via a simple vacuum filtration method. The FM@CNO UV PD shows high performance under 300 nm light illumination at 5 V bias, including high responsivity (0.08 AW −1 ), high detectivity (1.1 × 10 12 Jones), high UV/visible rejection ratio (3.86 × 10 3 ) and fast speed (0.12/1.24 ms). Furthermore, the FM@CNO device exhibits excellent flexibility after many bending cycles. In addition, the FM@CNO array device was used as a pixel array detector for UV imaging. This work provides a novel approach to achieve high performance flexible PDs based on filter membrane and two dimensional materials.

Preparation of ultrathin graphene film via capillary liquid bridge for uniform lithium nucleation in anode free lithium metal battery

Construction of graphene nanosheet films (GNF) with different thickness is highly important for their various applications. Construction of uniform GNF with defined thickness in nanoscale and large size remains challenge. Herein, a facile liquid bridge of capillary array is firstly designed to facilitate the oriented self-assembly of GNF. It is found that the self-assembly of GNF can be well controlled by Marangoni coefficient, in which the characteristic length (R) of liquid bridge for rapid spreading of trace solution on the Cu foil can be a controllable factor. As a result, the GNF with large-area (m2 level) and high-precision thickness (tens of nanometers) has been prepared. Taking the GNF on Cu substrate as lithium deposition electrode, the uniform Li nucleation and orientation growth can be realized to eliminate the growth of lithium dendrites, ascribing to the high lithiophilic of graphene. In the anode-free Li-LiFePO4 battery, the Coulombic efficiency (CE) of the first cycle can reach 88% at a cathode loading of 3 mg cm–2 and a current of 1 C, while the average CE can reach 99.1% within 100 cycles.

Constructing 1 T-2 H TaS2 nanosheets with architecture and defect engineering for enhance hydrogen evolution reaction

Tailoring tantalum disulfide (TaS2) electrocatalysts with tunable stacking architecture and phase structure is of great importance for advancement of hydrogen evolution reaction (HER). In this work, stacking architecture- and phase- modulated tantalum disulfide nanosheets are reported through a facile liquid phase synthesis strategy. Accordion-like nanosheets, vertical nanosheets and ultrathin nanosheets are named according to their obvious stacking architecture, and 1 T-2 H mixed phase structures containing different degrees of 2 H phases are realized. High-resolution transmission electron microscopy shows that there are obvious lattice defects in the nanosheets. Tantalum disulfide nanosheets synergistically integrate multiple advantages of nanostructure engineering, phase engineering and defect engineering. In the HER process, the ultrathin tantalum disulfide nanosheet structure is conducive to the in-plane electron transfer, and its close contact with the electrode surface makes the charge transfer faster and has the best HER activity. The overpotential of the ultrathin nanosheet electrocatalyst at 10 mA cm−2 is 280 mV. After 10,000 CV cycles and over 40 h of i-t test, the catalyst still has high stability in acidic media. Theoretical calculations show that the addition of 2 H phase structure and rich defects improves the intrinsic activity and active sites, and jointly promotes the improvement of HER performance. Our work integrates a variety of optimal regulation methods into TaS2 nanosheets, providing a new idea for the construction of advanced electrocatalysts for water electrolysis.

Layer-by-Layer Heterostructure of MnO2@Reduced Graphene Oxide Composites as High-Performance Electrodes for Supercapacitors.

In this paper, δ-MnO2 with layered structure was prepared by a facile liquid phase method, and exfoliated MnO2 nanosheet (e-MnO2) was obtained by ultrasonic exfoliation, whose surface was negatively charged. Then, positive charges were grafted on the surface of MnO2 nanosheets with a polycation electrolyte of polydiallyl dimethylammonium chloride (PDDA) in different concentrations. A series of e-MnO2@reduced graphene oxide (rGO) composites were obtained by electrostatic self-assembly combined with hydrothermal chemical reduction. When PDDA was adjusted to 0.75 g/L, the thickness of e-MnO2 was ~1.2 nm, and the nanosheets were uniformly adsorbed on the surface of graphene, which shows layer-by-layer morphology with a specific surface area of ~154 m2/g. On account of the unique heterostructure, the composite exhibits good electrochemical performance as supercapacitor electrodes. The specific capacitance of e-MnO2-0.75@rGO can reach 456 F/g at a current density of 1 A/g in KOH electrolyte, which still remains 201 F/g at 10 A/g. In addition, the capacitance retention is 98.7% after 10000 charge-discharge cycles at 20 A/g. Furthermore, an asymmetric supercapacitor (ASC) device of e-MnO2-0.75@rGO//graphene hydrogel (GH) was assembled, of which the specific capacitance achieves 94 F/g (1 A/g) and the cycle stability is excellent, with a retention rate of 99.3% over 10000 cycles (20 A/g).

Nanocellulose interface enhanced all-cellulose foam with controllable strength via a facile liquid phase exchange route

The development of sustainable, biodegradable, non-toxic biomass foams with outstanding physical properties to replace traditional petroleum-based foams is urgent. In this work, we proposed a simple, efficient, and scalable approach to fabricate nanocellulose (NC) interface enhanced all-cellulose foam through ethanol liquid phase exchange and subsequent ambient drying. In this process, NCs served as reinforcer and binder were integrated with pulp fiber to improve cellulose interfibrillar bonding and interface adhesion between NCs and pulp microfibrils. The resultant all-cellulose foam displayed stable microcellular structure (porosity of 91.7–94.5 %), low apparent density (0.08–0.12 g/cm3), and high compression modulus (0.49–2.96 MPa) by regulating the content and size of NCs. Further, the strengthening mechanism of the structure and property of all-cellulose foam were investigated in detail. This proposed process enabled ambient drying, and is simple and feasible for low-cost, practicable, and scalable production of biodegradable, green bio-based foam without special apparatuses and other chemicals.

Catalyst regulated interfacial synthesis of self-standing covalent organic framework membranes at room temperature for molecular separation

Covalent organic framework (COF) membranes have shown enormous potential for molecular separation due to their large surface areas and pre-designable structures. However, the mild and convenient preparation of COF membranes with high crystallinity has remained a significant challenge. In this work, we reported on a facile liquid–liquid interfacial polymerization method to fabricate self-standing imine-based COF membranes with excellent crystallinity and a tunable thickness at room temperature. Polymerization was confined at the immiscible organic solvent–water interface when the monomers in the dichloromethane met the catalyst aqueous solution. This unique design concept exploited the rapid formation of COF monolayers at the liquid–liquid interface to control catalyst diffusion and structural rearrangement, achieving high crystallinity of the COF membrane. Moreover, the thickness of the self-standing COF membranes could be regulated from 50 nm to 1 μm through the flexible regulation of the growth process. Benefiting from the large surface area of the COF membranes (378 m2/g) and the intensive π–π conjugate effect between the COFs and organic dyes, the obtained COF membranes exhibited high adsorption capacities toward Chrome Black T and Rose Bengal. This work may open a viable avenue to easily and mildly prepare COF membranes for water treatment.

Constructing Robust Solid Electrolyte Interface via ZrO2 Coating Layer for Hard Carbon Anode in Sodium-Ion Batteries

Hard carbon (HC) has attracted extensive attention due to its rich material source, environmental non-toxicity, superior sodium storage capacity, and lower sodium storage potential, and is considered most likely to be a commercial anode material for sodium-ion batteries (SIBs). Nevertheless, the limited initial Coulombic efficiency (ICE) of HC is the main bottleneck hindering its practical application. To alleviate this issue, herein, a ZrO2 coating was skillfully constructed by using a facile liquid phase coating method. The ZrO2 coating can act as a physical barrier to prevent direct contact between the HC surface and the electrolyte, thus effectively reducing irreversible sodium adsorption and inhibiting the continuous decomposition of the electrolyte. Meanwhile, this fresh interface can contribute to the generation of a thinner solid electrolyte interface (SEI) with high ionic conductivity. As a result, the ICE of the ZrO2-coated HC electrode can be optimized up to 79.2% (64.4% for pristine HC). Furthermore, the ZrO2-coated HC electrode delivers outstanding cyclic stability so that the capacity retention rate can reach 82.6% after 2000 cycles at 1 A g−1 (55.8% for pristine HC). This work provides a flexible and versatile surface modification method to improve the electrochemical property of HC, and hopefully accelerate the practical application of HC anodes for SIBs.

Fabrication of amorphous PdNiCuP nanoparticles as efficient bifunctional and highly durable electrocatalyst for methanol and formic acid oxidation

• We utilize a facile laser liquid ablation method to synthesize amorphous PdNiCuP. • The amorphous PdNiCuP is highly efficient and stable for both MOR and FAOR. • The amorphous PdNiCuP displays superior anti-poisoning ability. Highly active and durable electrocatalytic materials towards small molecules electro-oxidation reaction are critical to the large-scale commercial applications of direct liquid fuel cells. Unfortunately, current nanocrystalline electrocatalysts normally suffer from low catalytic efficiency, severe CO poisoning and rapid activity decay. Herein, we report a novel amorphous PdNiCuP catalyst synthesized with laser liquid ablation as a potential settlement to this issue. The as-obtained amorphous PdNiCuP catalyst exhibits enhanced electrocatalytic performance with the mass activity of 1.61 A mg −1 and 737.8 mA mg −1 towards methanol oxidation reaction (MOR) and formic acid oxidation reaction (FAOR), respectively. Moreover, amorphous PdNiCuP displays excellent operation stability and CO-poisoning resistance in both alkaline and acidic medium. P was proposed to play the decisive role for forming the amorphous structure and maintaining the catalytic stability in MOR and FAOR processes. This work provided insights for the ration design of active and durable amorphous electrocatalysts applied in direct liquid fuel cells.

Development and Validation of a UHPLC-MS/MS Method for Quantitation of Almonertinib in Rat Plasma: Application to an in vivo Interaction Study Between Paxlovid and Almonertinib.

Almonertinib was approved for the first-line treatment of advanced NSCLC patients with EGFR-TKI-sensitive genetic mutations by National Medical Products Administration (NMPA) in 2021.The purpose of this study was to establish and validate a fast, accurate, stable and facile ultra-performance liquid chromatography-tandem mass spectrometry method for the quantification of almonertinib in rat plasma, it was employed to explore the effect of Paxlovid on the pharmacokinetics of almonertinib in rats. Zanubrutinib was used as an internal standard (IS), and the plasma samples were prepared by the protein precipitation method using acetonitrile. Chromatographic separation was carried out on a Shimadzu LC-20AT ultra-performance liquid chromatography system using a Shim-pack velox C18 (2.1× 50 mm, 2.7 μM) column. The mobile phase consisted of methanol and 0.1% formic acid-water. Mass spectrum analysis was executed using Shimadzu 8040 Triple quadrupole mass spectrometry. The precursor and product ions of the analyte and internal standard were detected in multiple reaction monitoring (MRM) mode. The typical fragment ions were m/z 526.20 → 72.10 for almonertinib and m/z 472.15 → 290.00 for zanubrutinib (IS). The method was validated to have good linearity for quantifying almonertinib in rat plasma from 0.1–1000 ng/ml (R2 = 0.999), and the LLOQ was 0.1 ng/ml. The validity of this method was sufficiently verified for selectivity, specificity, extraction recovery, matrix effect, accuracy, precision and stability. The validated UHPLC–MS/MS method was successfully applied to the drug interaction study of almonertinib with Paxlovid in rats. Paxlovid significantly inhibits the metabolism of almonertinib and increased the exposure of almonertinib. This study can help us to understand the metabolic profile of almonertinib better, and further human trials should be conducted to validate the results.

A new sodium ion preintercalated and oxygen vacancy-enriched vanadyl phosphate cathode for aqueous zinc-ion batteries

At present, layered vanadium–oxygen structures have attracted wide attention for multivalent metal ion storage, especially in aqueous zinc-ion batteries (AZIBs), due to the attractive layered structure and large specific capacity based on V5+/V3+ double electron transfer. However, in addition to a large specific capacity, a high output voltage is necessary to achieve a high specific energy density. Vanadium oxide and vanadate usually feature low working voltages, serious structural degradation and limited practical. To alleviate these problems, some cathode modification strategies have been proposed that improve the operating voltage, structural stability and diffusion kinetics of multivalent metal ions. In this paper, vanadyl phosphate (Nay(VO1−x)3(PO4)2) nanosheets preintercalated with sodium ions and modified with oxygen vacancies were prepared via a facile one-step liquid phase treatment. The Nay(VO1−x)3(PO4)2 nanosheet cathode for AZIBs delivered a high specific capacity of 75.3 mAh g−1 at 0.1 A g−1 and retained 27.5 mAh g−1 after 4000 cycles at 2 A g−1. Subsequently, the as-prepared Nay(VO1−x)3(PO4)2 nanosheets were physically and electrochemically characterized, and a possible mechanism of Zn2+ insertion/extraction and structural decomposition was proposed based on ex situ XRD and XPS characterizations. Our work provides a simple method for simultaneously introducing sodium ion preintercalation and oxygen vacancies into vanadyl phosphate structures, and provides some insights into the zinc storage mechanism.

Effect of ZnO seed layer annealing temperature on the growth of ZnO nanorods and its catalytic application

This paper reports the effect of ZnO seed layer annealing temperature on the growth of ZnO nanorods. ZnO nanorods were grown on fluorine-tin oxide (FTO) substrate via simple and facile liquid phase deposition (LPD) at low temperature. High density homogeneous ZnO nanorods have successfully been synthesized directly on the substrate at 60 °C for 4 h reaction time. It was observed that average diameter and length of ZnO nanorod increased, when the annealing temperature increased from 300 °C to 500 °C. Field emission scanning electron microscope (FESEM) images reveal that by increasing the annealing temperature, the homogeneity, particle size, orientation and morphological shape of ZnO nanostructure have been modified. The photoluminescence (PL) spectra reveal the decrease in green emission as the annealing temperature was increased. The UV–Visible characterization confirms the decrease in the transmittance as the annealing temperature was increased.

Nano-Graphene Layer from Facile, Scalable and Eco-Friendly Liquid Phase Exfoliation Strategy as Effective Barrier Layer for High-Performance and Durable Direct Liquid Alcohol Fuel Cells.

Graphene, in spite of exceptional physio-chemical properties, still faces great limitations in its use and industrial scale-up as highly selective membranes (enhanced ratio of proton conductivity to fuel cross-over) in liquid alcohol fuel cells (LAFCs), due to complexity and high cost of prevailing production methods. To resolve these issues, a facile, low-cost and eco-friendly approach of liquid phase exfoliation (bath sonication) of graphite to obtain graphene and spray depositing the prepared graphene flakes, above anode catalyst layer (near the membrane in the membrane electrode assembly (MEA)) as barrier layer at different weight percentages relative to the base membrane Nafion 115 was utilized in this work. The 5 wt.% nano-graphene layer raises 1 M methanol/oxygen fuel cell power density by 38% to 91 mW·cm−2, compared to standard membrane electrode assembly (MEA) performance of 63 mW·cm−2, owing to less methanol crossover with mild decrease in proton conductivity, showing negligible voltage decays over 20 h of operation at 50 mA·cm−2. Overall, this work opens three prominent favorable prospects: exploring the usage of nano-materials prepared by liquid phase exfoliation approach, their effective usage in ion-transport membrane region of MEA and enhancing fuel cell power performance.

Atomic-level modulation of local coordination environment at Fe single-atom sites for enhanced oxygen reduction

Single-atom catalysts (SACs) have aroused extensive attention due to their ultrahigh activity and selectivity. However, precisely regulating and designing the coordination microenvironment of SACs to optimize the catalytic efficiency remains a great challenge. Here, a facile ionic liquid (IL) modification strategy is creatively proposed to obtain N and P dual-coordinated Fe single atoms with N unsaturated coordination on pre-designed FeSAC-N4/C sites. The using a hydrophobic IL can alter the binding affinity of O2, maintain a higher O2 concentration at the catalyst interface, and protect Fe single atom sites from surface oxidation and methanol toxicity. Theoretical calculation indicates that this unique coordination and the N vacancy can tailor the electronic structure of the metal atoms and alter the charge distribution at the coordination structures, thus improving the oxygen reduction reaction performance. This study offers an effective approach for accurately controlling the coordination electronic structure and interface environment of SACs at room temperature.

A Facile Liquid Alloy Wetting Enhancing Strategy on Super‐Hydrophobic Lotus Leaves for Plant‐Hybrid System Implementation

AbstractPlant‐hybrid systems have demonstrated exciting opportunities in plant health sensing, climate monitoring, and energy harvesting, endowing great prospects for connecting plants to man‐made digitalized world. Due to its intrinsic softness/stretchability, biocompatibility, and non‐invasion, liquid alloy has shown great advantages in plant‐hybrid system implementation. However, many widely seen plant organisms having micro‐nano surface structures and waxy layer, e.g., lotus leaves, showing super‐hydrophobic behavior, prevent the liquid alloy adhesion and further its implementation of plant‐hybrid systems. By introducing a low‐concentration soap solution as an intermediate layer onto super‐hydrophobic leaves, the authors thereby propose a facile liquid alloy wetting enhancing strategy and well print liquid alloy circuits on the leaves to form plant‐hybrid systems. Surfactants (in the soap) enhance the wetting ability of solution on the lotus leaf surface, and subsequently the attracted water on the leaf surface contributes to make liquid alloy adhered on super‐hydrophobic leaves. Furthermore, the authors demonstrate the liquid alloy plant‐hybrid implementation based on the lotus leaves for the perception of human body, and set a system as a home intrusion alarm. This work presents an excellent example of digitalized integration on super‐hydrophobic plant organisms, which provides a new tool technology for plant‐hybrid implementations and broadens the digitalized application range of plants.

Synthesis and characterization of Sb2O3 nanoparticles by liquid phase method under acidic condition

Antimony trioxide (Sb2O3) nanoparticles were successfully synthesized via a facile and practical liquid phase method under acidic condition. The structure, composition and surface morphology of the as-prepared products have been characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy (EDS), scanning electronic microscopy (SEM) and high resolution transmission electron microscopy (HRTEM). The as-obtained products revealed a cubic phase of Sb2O3 (JCPDS No. 05–0534) with a preferred plane of (222) and lattice spacing of a = 11.180 Å. Besides, Sb2O3 octahedra, spherical and polyhedral nanoparticles, coral-like nanorod and paddy-like nanosheets have also been synthesized by the modulating reaction time and solution pH value under acidic condition. According to the results of the time-dependent and pH-dependent experiments, the possible formation mechanisms for Sb2O3 nanocrystals with diverse morphologies have been proposed, which could be a favorable suggestion for the synthesis of other metal-oxide nanomaterials with morphology control.

Nontraditional oil sorbents: Hydrophilic sponges with hydrophobic skin layer for efficient oil spill remediation

Advances in the use of porous materials for oil-water separation offer a promising avenue for solving oil spill problems. Conventionally, to realize selective oil absorption, porous sorbents need to be fully hydrophobized with low-surface-energy chemicals. However, such exhaustive hydrophobization brings about problems of excessive chemical consumption, high cost and increased environmental hazards, hindering the practical applications of sorbents. Here, an innovative type of oil sorbent is developed via a facile liquid film-based dip coating technique. Unlike conventional fully-hydrophobized sorbents, only the outmost layer of our sorbent is modified with hydrophobic polydimethylsiloxane (PDMS) coating while the inner part remains hydrophilic, thus achieving 80% reduction in low-surface-energy chemical consumption. The prepared sorbent allows highly selective oil absorption from oil-water mixture, as the hydrophobic skin layer blocks water entrance and the hydrophilic inner part drives oil absorption. More importantly, our sorbent significantly speeds up oil absorption, and compared with conventional hydrophobic sponges, the absorption time is reduced by 36% for absorption of the same mass of crude oil, attributed to the strong capillary absorption of its hydrophilic inner channels. This sorbent also shows larger specific absorption capacity than its fully hydrophobized counterpart. Our study provides a general strategy to develop cost-effective and environmental-benign sorbents with enhanced oil spill absorption performances.

A general and facile solution approach for deposition of high-quality metal oxide charge transport layers

Metal oxide charge transport layers (CTLs) are significant components for fabricating high-performance thin film solar cells. Generally, sol-gel methods have been widely used to deposit high-quality metal oxide CTLs, but they usually suffer from the choices of solvents, ligands and metal precursors. Here we report a general and facile ionic liquid (n-butylammonium butyrate) approach to prepare V2O5, MoO3, WO3, NiO, ZnO and SnO2 thin films, which exhibits strong dissolving ability and good film-forming property. The thermal volatilization of ionic liquid is mild, which provides a slow and stable decomposition process of metal compounds and favors the formation of smooth and compact CTLs. All thin films are highly transparent in the visual range from the optical transmittance spectra and suitable to be CTLs in photovoltaic devices. Encouragingly, we have received the efficiencies of 15.06% and 13.38% based on the area of 0.09 and 1.21 cm2 (NiO as the hole transport layer), and 19.13% and 16.71% based on the area of 0.09 and 1.21 cm2 (SnO2 as the electron transport layer), which are obviously higher than those of devices prepared by traditional sol-gel methods.

Hierarchical CoTiO3 microrods on Ti3C2Tx MXene heterostructure as an efficient sonocatalyst for bisphenol A degradation

One-dimensional CoTiO3 microrods decorated on two-dimensional layered MXene nanosheets (CoT@MX) were synthesized via a facile liquid self-assembly method for use in bisphenol A (BPA) degradation. Different characterization techniques were adopted to investigate their structure, chemical state, morphology, and optical properties. The results revealed that the CoT@MX heterostructure was successfully fabricated with strong interface contact and an intimate interaction between CoTiO3 and MXene, which significantly boosted the sonocatalytic activity compared to that of sole CoTiO3 and MXene. In particular, the CoT@MX (1:0.5) nanocomposite displayed an excellent sonocatalytic performance, and its removal efficiency for BPA was 96.9% within 90 min. The influence of various reaction factors, including the catalyst dosage, initial concentration of BPA, operational pH, ultrasonic power, water matrix, and effects of coexisting ions, during BPA degradation was investigated systemically. The MXene nanosheets could provide new surface-active sites, which were conducive to the interaction between the catalyst and BPA pollutant molecules. Furthermore, the quenching tests and electron spin resonance analysis revealed that OH and O2− jointly contributed to BPA degradation. Finally, the feasible sonocatalytic reaction mechanism of CoT@MX was elucidated.