ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Rihong Xiao,Jianping Yang,Yili Zhang,Zhuo Xiong,Junying Zhang,Yongchun Zhao
Industrial flue gas mercury emissions account for 30% of global atmospheric mercury emissions. While selenium-based materials show potential in reducing mercury emissions, the aspect of mercury recovery is neglected amidst the pressing need for mercury resources. Unlike conventional adsorbent regeneration cycles, elemental selenium anchoring mercury directly yields valuable by-products such as HgSe, a semiconductor with a narrow bandgap, considered ideal for optoelectronic devices. Amorphous selenium (α-Se) exhibits high mercury removal efficiency at room temperature but converts to less active trigonal selenium (t-Se) in high-temperature industrial flue gas. The literature on the mercury removal behavior of t-Se is limited. To address this issue, rod-shaped selenium (Se-rod) with specific exposed active crystal facets (101) and vacancy defects is synthesized, achieving an exceptional mercury adsorption capacity of 430.10 mg g −1 . Moreover, the optical performance of self-produced HgSe surpasses those of commercial samples. Se-rod can be utilized for mercury removal while also bridging the gap in mercury resource supply.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Suhui Wang,Xu Zhang,Tengxiao Guo,Shuya Cao
Quantum dot (QD) passive filters present a simple and low-cost strategy for the micromation of spectrometers. In this field, the consistency between ultranarrow band gap QD fabrication and the precise control of its absorption characteristics is the key-challenge to extend QD spectrometers into the long-wave infrared (LWIR) region. Here, we show the model-based, practically precise fabrication of HgSe QDs as well as their specific spectral responses. Both the theoretical and experimental models of the HgSe QDs r–λ are formulated, which reveals the variation of transmission spectrum with the size of HgSe QDs. Then, the HgSe QDs synthesis parameter–spectral response hyperplane model and neural network model were obtained by using traditional polynomial fitting and machine learning, respectively. We also demonstrate the model-based precise fabrication of HgSe QDs with transmission characteristic peaks within 14 μm. The further simulation also shows that the 255─element QD filter array has the signal-to-noise ratio up to 14.57 dB with detection resolution about 5 cm–1.
研究领域:
材料科学
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光学工程
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机器学习
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Rihong Xiao,Yili Zhang,Shuzhou Wei,Xing Chuai,Xiangzheng Cui,Zhuo Xiong,Junying Zhang,Yongchun Zhao
Massive Hg emissions from coal-fired units cause serious environmental pollution and result in a substantial waste of Hg resources. In this study, the prepared millimeter-grade Se/SiO 2 adsorbent was applied as a filler to adsorb mercury in a fixed-bed reactor to obtain the high value-added product HgSe, which solved the problem of short contact time and secondary pollution caused by the traditional injection mercury removal adsorbents. Experimental Hg removal showed that the 25 % Se-loaded adsorbent exhibited excellent Hg removal performance at 150 °C, with a saturation adsorption capacity of mercury was as high as 101.04 mg/g, nearly 300 times that of commercial activated carbons. Additionally, the influence of the flue gas composition on the Hg removal performance of Se/SiO 2 was studied. The results showed that O 2 , NO, and HCl increased the efficiency of Hg removal and SO 2 and SO 3 had trivial impact on the Hg removal performance. The Hg temperature-programmed desorption test results showed that the adsorbed Hg appeared predominantly as HgSe on the sample surface. DFT calculations verified that Se loading improved Hg removal performance and defined the adsorption mechanism. Moreover, the prepared Se/SiO 2 adsorbent carrier was soluble SiO 2 , which provided a good condition for the subsequent high-purity collection of HgSe. Finally, the technological process of Hg removal via Se-loaded adsorbents and the recovery of HgSe were proposed, which could offer a new way to achieve the resource utilization of Hg.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Nature Communications
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2024
·Vol. 15
·期 1
·1-15
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IF 14.7
Li Hailong,Meng Fanyue,Zhu Penglin,Zu Hongxiao,Yang Zequn,Qu Wenqi,Yang Jianping
Highly efficient decontamination of elemental mercury (Hg 0 ) remains an enormous challenge for public health and ecosystem protection. The artificial conversion of Hg 0 into mercury chalcogenides could achieve Hg 0 detoxification and close the global mercury cycle. Herein, taking inspiration from the bio-detoxification of mercury, in which selenium preferentially converts mercury from sulfoproteins to HgSe, we propose a biomimetic approach to enhance the conversion of Hg 0 into mercury chalcogenides. In this proof-of-concept design, we use sulfur-rich polyphenylene sulfide (PPS) as the Hg 0 transporter. The relatively stable, sulfur-linked aromatic rings result in weak adsorption of Hg 0 on the PPS rather than the formation of metastable HgS. The weakly adsorbed mercury subsequently migrates to the adjacent selenium sites for permanent immobilization. The sulfur-selenium pair affords an unprecedented Hg 0 adsorption capacity and uptake rate of 1621.9 mg g −1 and 1005.6 μg g −1 min −1 , respectively, which are the highest recorded values among various benchmark materials. This work presents an intriguing concept for preparing Hg 0 adsorbents and could pave the way for the biomimetic remediation of diverse pollutants.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2024
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IF 6.7
Suhui Wang,Yi Wang,Tengxiao Guo,Shuya Cao
In this work, a long-wave infrared (LWIR) quantum dot (QD) spectrometer was constructed for the first time by integrating a 255-element HgSe QD filter array with an LWIR array detector. The filter array was fabricated using a combination inkjet printing strategy with eight types of T-dodecyl mercaptan-terminated HgSe QD inks. The stability and morphology of the QDs were improved by optimizing the purification methodology and ligand modification. Combined with the compressive-sensing-based least-squares linear regression (CS-LS) algorithm, the LWIR QD spectrometer achieved a spectral resolution of 5.4 cm–1 over a wide spectral range of 8 to 14 μm, enabling the detection of the chemical warfare agent simulant dimethyl methylphosphonate. This technology is expected to facilitate the development of smaller volumes and more accurate identification of various targets in the future. This paper offers an approach to fabricating low-cost LWIR spectrometers and promoting the scale-up applications of QD devices.
研究领域:
光学
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材料科学
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光谱学
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化学传感
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
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2022
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IF 8.943
Peicheng Huang,Weichun Yang,Varney Edwin Johnson,Mengying Si,Feiping Zhao,Qi Liao,Changqing Su,Zhihui Yang
The contamination of soils by mercury (Hg) seriously threatens the local ecological environment and public health. S-functionalized amendments are common remediation technology , yet, Hg re-activation often occurs in the commonly used immobilization remediation by S-functionalized amendments, resulting in an unsatisfactory remediation effect. In this study, a novel FeS–Se functionalized biochar composite (FeS-Se-BC) amendment was prepared and applied for the efficient remediation of Hg-polluted soil. An immobilization efficiency of 99.62% and 99.22% for H 2 O-extractable Hg and TCLP solution-extractable Hg was achieved with the application of FeS-Se-BC (0.05) after 180 d. The analyses of XPS, Hg-TPD, SEM-EDS demonstrated that excellent remediation performance by FeS-Se-BC resulted from the synergistic effect of FeS and Se to form HgS and HgSe concurrently. In comparison to the treatments of biochar and FeS-functionalized biochar (FeS-BC), FeS-Se-BC promoted the transformation of exchangeable, carbonate-bound, and Fe–Mn oxides-bound Hg fractions into organic material-bound, and residual fractions, effectively reducing the risk of Hg-contaminated soil from a highly dangerous level to a low risk. Furthermore, the introduction of Se clearly inhibited the re-activation of Hg and reduced the release of Hg by 81.12% compared to FeS-BC when the ratio of S 2− to Hg was 5: 1 due to the formation of extremely stable HgSe. These results suggest that FeS-Se-BC has good potential for remediation of Hg-polluted soils which provides a new inhibitory idea for Hg re-activation after immobilization.
研究领域:
环境科学
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土壤修复
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化学工程
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2026
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IF 7.8
Hong Mingdong,Yang Shengyi,Zou Guanzhen,Ge Zhenhua,Zhu Mengchun,Liu Mingzhu,Zou Bingsuo,Jiang Yurong,Tang Libing
Mercury chalcogenides (HgX) colloidal quantum dots (CQDs), particularly mercury selenide (HgSe) CQDs, have emerged as a promising candidate for long-wave infrared (LWIR, 8–14 μm) photodetectors due to their exceptional bandgap tunability by solution processing. Nevertheless, the intrinsic limitations of bare HgSe CQDs—high surface defect density and oxidation susceptibility—severely compromise their optoelectronic performance. In this paper, a simple two-step method to grow high-quality HgSe/PbS core-shell CQDs in the LWIR region by synergistically optimizing the thickness of the PbS shell for surface passivation and the oxidation resistance of the HgSe cores is presented. Further, its applications in LWIR detection are explored using a simple metal–semiconductor–metal (MSM) based photodetector Au/(HgSe/PbS)/Au. As a result, a high responsivity of 42 mA/W with a high specific detectivity of 2.41 × 10 9 Jones under a 25 mW/cm 2 , 10 μm illumination is obtained from the LWIR photodetector Au/[HgSe(13 nm)/PbS(5 nm)](1 μm)/Au at room-temperature. Therefore, such a simple two-step method of core-shell engineering approach establishes a versatile platform for developing next-generation LWIR optoelectronics.
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DOI
PubMed
高影响因子
ACS ES&T Engineering
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2026
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IF 6.3
Rihong Xiao,Yili Zhang,Wei Yang,Daorong Sun,Changxin Luo,Xiangzheng Cui,Zhuo Xiong,Junying Zhang,Yongchun Zhao
Modified magnetospheres (MAG) as a regenerable adsorbent offer a promising alternative to conventional activated carbon injection (ACI) for mercury removal from flue gas. However, large-scale application faces challenges in achieving uniform flue gas dispersion and in high-value recovery of desorbed mercury vapor from spent MAG rich in mercury. In this study, a dual strategy combining swirl injection and value-added HgSe recovery was developed. The swirl injection model was validated at a 315 MW coal-fired power plant, reducing mercury in flue gas to 0.035 μg/m3, with swirl pressure identified as a key factor. An in situ selenium-based recovery agent (I–Se/SiO2) selectively stabilized desorbed Hg0, and DFT calculations indicated that it had significantly higher selectivity toward Hg0 than HgCl2 under flue gas conditions. Continuous field operation achieved 100% mercury recovery as pure HgSe (99.97%) with superior optical properties. Economic analysis showed that system investment and operating costs were only 32% and 19% of those for ACI, with a payback period under one year. This work establishes a new paradigm integrating end-of-pipe mercury abatement with resource recovery in coal-fired power plants.
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DOI
高影响因子
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