Prof. Yuxuan Wang | Publications & Academic Profile | SinoGreenTech

Research Publications & English Decoded Briefs

Showing 3 publications

Chinese Journal of Environmental Engineering•2026•DOI: 10.12030/j.cjee.202511002

Adsorption and High-Temperature Nitrogen Desorption Performance and Mechanism of Granular Activated Carbon for Large-Air-Volume Low-Concentration PCE-Containing Waste Gas

To treat large-air-volume, low-concentration volatile organic compounds (VOCs) containing tetrachloroethylene (PCE) generated from rubber-metal bonding, this study systematically investigated the adsorption-desorption behavior and interaction mechanisms of PCE, toluene, and methyl isobutyl ketone (MIBK) on granular activated carbon (GAC). Static adsorption experiments showed that PCE adsorption capacity reached 556.6 mg·g−1, while dynamic multi-component adsorption capacity was 179.6 mg·g−1. Kinetic analysis indicated that PCE adsorption was controlled by both intraparticle diffusion and external surface adsorption, whereas toluene and MIBK were primarily intraparticle diffusion-limited. During high-temperature nitrogen desorption, PCE underwent dechlorination, hydrogenation, and recombination, producing trichloroethylene, 1,2-dichloroethane, 1,2-dichloropropane, and HCl, with HCl accounting for 3.61% of the chlorine molar content in adsorbed PCE. After four adsorption-desorption cycles, the iodine value of GAC dropped below the industry standard of 600 mg·g−1; however, water washing and alkali immersion extended the cycle life to 8 and 9 cycles, respectively. The HCl generation pattern in co-adsorption systems was consistent with single-PCE systems. A regeneration process combining alkali immersion and water washing was proposed and integrated into an engineering strategy. Compared to conventional activated carbon adsorption coupled with RTO incineration, the proposed classification strategy reduced annual costs by 49.5×10⁴ CNY. This work provides a cost-effective and safe solution for Cl-VOCs treatment.

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SCIENCE CHINA Materials•2025•DOI: 10.1007/s40843-025-3397-0

Regulating the orbital hybridization to induce asymmetrical catalysis for efficient reversible sodium conversion storage

Carbon-supported single-atom catalysts (C-SACs) have been demonstrated as a strategy to promote the reversible conversion reaction of metal sulfide anodes in sodium-ion batteries (SIBs). However, the design principle of promising C-SACs remains lacking for obtaining highly reversible metal sulfide anodes. We designed a phosphorus-doped carbon-supported single-atom Mn catalyst (PC-SAMn) with an asymmetrical dual active center. The sulfiphilic Mn and sodiophilic P active centers adsorb discharged Na2S through Mn–S d-p and P–Na s-p orbital hybridizations. The asymmetrical dual active center induced the asymmetrical adsorption configuration of Na2S, which efficiently weakened Na–S bond strength and facilitated the decomposition of Na2S during charging. As a result, the designed catalyst enables typical MoS2 with a record-high compositional reversible degree of 89.61% and a low capacity decay ratio of only 0.18% per 100 cycles during 2000 cycles. The research establishes the “orbital hybridization–molecular structure–catalytic activity” relationship for guiding the design of highly reversible conversion-type materials.

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SCIENCE CHINA Materials•2025•DOI: 10.1007/s40843-025-3624-y

Heterointerface engineering via controlled nitridation enables GHz-to-THz broadband electromagnetic wave absorption in Mo1.33B2Tx nanosheets

MBene materials, as emerging two-dimensional transition metal borides, exhibit exceptional potential for electromagnetic (EM) wave absorption due to their high conductivity and tunable surface properties. However, their structural instability and limited EM absorption efficiency in the gigahertz (GHz) or terahertz (THz) band remain critical challenges. Controlled nitridation enables the construction of heterogeneous interfaces, providing an effective strategy for precisely tailoring EM absorption properties. Herein, through NH3 annealing of exfoliated Mo1.33B2Tx nanosheets, we engineered a hierarchical nanoflower morphology with MoN/MoB heterointerfaces, which synergistically enhanced dielectric loss and impedance matching. The optimized Mo1.33B2Tx-650 absorber achieved a record minimum reflection loss (RLmin) of −61.4 dB and a broad effective absorption bandwidth across key GHz frequencies. Notably, monolayer Mo1.33B2Tx nanosheets simultaneously exhibited ultrahigh THz wave absorption (94.54% at 0.5–3.8 THz) and near-perfect visible transparency (99.12%), unlocking unprecedented potential for transparent optoelectronic devices. Combined with superior thermal and mechanical properties, this study establishes a generalizable paradigm for designing multifunctional MBene-based absorbers operating across GHz to THz spectra.

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